ZIP Codes in Maryland

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ZIP Codes in Maryland

Here is the most complete and accurate database of postal codes in Maryland or zip codes in Maryland. Information of postal/zip codes of Maryland is presented on the basis of the latest versions of the postcode database shared by the authorities via the internet. We would like to note that, unlike other sites with zip codes / postal codes databases, we only have tried to shared on real operating indexes/codes, there is no outdated information, and you can be absolutely sure that the index found on our website will be exactly valid and correspond to the selected address. Postal Code / Zip Codes in Maryland.

ZIP Code	Type	Cities	County	Area Codes
20588	Unique	Dhs, Camp Springs, Cheltenham, Columbia	Howard County	Area Code 410
20601	Standard	Waldorf	Charles County	Area Code 240
20602	Standard	Waldorf, Saint Charles	Charles County	Area Code 240
20603	Standard	Waldorf, Saint Charles	Charles County	Area Code 240
20604	PO Box	Waldorf, Saint Charles	Charles County	Area Code 240
20606	Standard	Abell	St. Mary’s County	Area Code 301
20607	Standard	Accokeek	Prince George’s County	Area Code 301
20608	Standard	Aquasco, Eagle Harbor	Prince George’s County	Area Code 240
20609	Standard	Avenue	St. Mary’s County	Area Code 301
20610	PO Box	Barstow	Calvert County	Area Code 410
20611	Standard	Bel Alton	Charles County	Area Code 240
20612	PO Box	Benedict	Charles County	Area Code 240
20613	Standard	Brandywine	Prince George’s County	Area Code 240
20615	Standard	Broomes Island, Broomes Is	Calvert County	Area Code 410
20616	Standard	Bryans Road	Charles County	Area Code 301
20617	Standard	Bryantown	Charles County	Area Code 240
20618	Standard	Bushwood	St. Mary’s County	Area Code 301
20619	Standard	California	St. Mary’s County	Area Code 301
20620	Standard	Callaway	St. Mary’s County	Area Code 301
20621	Standard	Chaptico, Maddox	St. Mary’s County	Area Code 301
20622	Standard	Charlotte Hall, Charlott Hall	Charles County	Area Code 240
20623	Standard	Cheltenham	Prince George’s County	Area Code 240
20624	Standard	Clements	St. Mary’s County	Area Code 240
20625	PO Box	Cobb Island	Charles County	Area Code 240
20626	Standard	Coltons Point	St. Mary’s County	Area Code 240
20627	PO Box	Compton	St. Mary’s County	Area Code 240
20628	Standard	Dameron	St. Mary’s County	Area Code 240
20629	PO Box	Dowell	Calvert County	Area Code 410
20630	Standard	Drayden	St. Mary’s County	Area Code 301
20632	Standard	Faulkner	Charles County	Area Code 240
20634	Standard	Great Mills	St. Mary’s County	Area Code 240
20635	PO Box	Helen	St Mary’s County	Area Code 240
20636	Standard	Hollywood	St. Mary’s County	Area Code 301
20637	Standard	Hughesville	Charles County	Area Code 240
20639	Standard	Huntingtown	Calvert County	Area Code 410
20640	Standard	Indian Head, Pisgah	Charles County	Area Code 240
20643	PO Box	Ironsides	Charles County	Area Code 240
20645	Standard	Issue, Swan Point	Charles County	Area Code 240
20646	Standard	La Plata, Dentsville	Charles County	Area Code 240
20650	Standard	Leonardtown	St. Mary’s County	Area Code 240
20653	Standard	Lexington Park, Lexington Pk	St. Mary’s County	Area Code 240
20656	Standard	Loveville	St. Mary’s County	Area Code 301
20657	Standard	Lusby	Calvert County	Area Code 410
20658	Standard	Marbury, Rison	Charles County	Area Code 240
20659	Standard	Mechanicsville, Mechanicsvlle	St. Mary’s County	Area Code 240
20660	PO Box	Morganza	St. Mary’s County	Area Code 240
20661	PO Box	Mount Victoria, Mt Victoria	Charles County	Area Code 240
20662	Standard	Nanjemoy	Charles County	Area Code 240
20664	Standard	Newburg	Charles County	Area Code 301
20667	Standard	Park Hall	St. Mary’s County	Area Code 240
20670	Standard	Patuxent River, Patuxent Rvr	St. Mary’s County	Area Code 240
20674	Standard	Piney Point	St. Mary’s County	Area Code 301
20675	Standard	Pomfret	Charles County	Area Code 301
20676	Standard	Port Republic	Calvert County	Area Code 443
20677	Standard	Port Tobacco	Charles County	Area Code 240
20678	Standard	Prince Frederick, Dares Beach, Prnc Frederck	Calvert County	Area Code 410
20680	Standard	Ridge	St. Mary’s County	Area Code 240
20682	PO Box	Rock Point	Charles County	Area Code 240
20684	Standard	Saint Inigoes	St. Mary’s County	Area Code 240
20685	Standard	Saint Leonard	Calvert County	Area Code 410
20686	PO Box	Saint Marys City, Saint Marys, St Marys City	St. Mary’s County	Area Code 240
20687	Standard	Scotland	St. Mary’s County	Area Code 240
20688	Standard	Solomons, Dowell	Calvert County	Area Code 410
20689	Standard	Sunderland	Calvert County	Area Code 410
20690	Standard	Tall Timbers	St. Mary’s County	Area Code 240
20692	Standard	Valley Lee	St. Mary’s County	Area Code 301
20693	Standard	Welcome	Charles County	Area Code 240
20695	Standard	White Plains	Charles County	Area Code 301
20697	Unique	Southern Md Facility, Sthrn Md Fac	Prince George’s County	Area Code 240
20701	Standard	Annapolis Junction, Annapolis Jct	Howard County	Area Code 410
20703	PO Box	Lanham, Lanham Seabrook	Prince George’s County	Area Code 240
20704	PO Box	Beltsville	Prince George’s County	Area Code 240
20705	Standard	Beltsville, Calverton	Prince George’s County	Area Code 240
20706	Standard	Lanham, Glenarden, Lanham Seabrook, Seabrook	Prince George’s County	Area Code 240
20707	Standard	Laurel	Prince George’s County	Area Code 240
20708	Standard	Laurel, Montpelier	Prince George’s County	Area Code 240
20709	PO Box	Laurel, Montpelier	Prince George’s County	Area Code 240
20710	Standard	Bladensburg	Prince George’s County	Area Code 240
20711	Standard	Lothian	Anne Arundel County	Area Code 240
20712	Standard	Mount Rainier	Prince George’s County	Area Code 301
20714	Standard	North Beach, Holland Point, Rose Haven	Calvert County	Area Code 301
20715	Standard	Bowie	Prince George’s County	Area Code 301
20716	Standard	Bowie, Mitchellville	Prince George’s County	Area Code 301
20717	PO Box	Bowie, Mitchellville	Prince George’s County	Area Code 240
20718	PO Box	Bowie	Prince George’s County	Area Code 240
20719	PO Box	Bowie	Prince George’s County	Area Code 240
20720	Standard	Bowie	Prince George’s County	Area Code 240
20721	Standard	Bowie, Mitchellville	Prince George’s County	Area Code 301
20722	Standard	Brentwood, Colmar Manor, Cottage City, N Brentwood,…	Prince George’s County	Area Code 240
20723	Standard	Laurel, Scaggsville	Howard County	Area Code 240
20724	Standard	Laurel, Maryland City, Md City, Russett	Anne Arundel County	Area Code 240
20725	PO Box	Laurel	Prince George’s County	Area Code 240
20726	PO Box	Laurel	Prince George’s County	Area Code 240
20731	PO Box	Capitol Heights, Capitol Hgts	Prince George’s County	Area Code 240
20732	Standard	Chesapeake Beach, Chesapeak Bch	Calvert County	Area Code 410
20733	Standard	Churchton	Anne Arundel County	Area Code 410
20735	Standard	Clinton	Prince George’s County	Area Code 301
20736	Standard	Owings	Calvert County	Area Code 410
20737	Standard	Riverdale, Riverdale Park, Riverdale Pk	Prince George’s County	Area Code 240
20738	PO Box	Riverdale	Prince George’s County	Area Code 240
20740	Standard	College Park, Berwyn Heights, Berwyn Hts	Prince George’s County	Area Code 301
20741	PO Box	College Park	Prince George’s County	Area Code 240
20742	Unique	College Park	Prince George’s County	Area Code 240
20743	Standard	Capitol Heights, Capitol Hgts, Fairmount Heights, Fairmou…	Prince George’s County	Area Code 240
20744	Standard	Fort Washington, Ft Washington	Prince George’s County	Area Code 240
20745	Standard	Oxon Hill, Forest Heights, Forest Hts	Prince George’s County	Area Code 301
20746	Standard	Suitland, Camp Springs, Hillcrest Hgts, Hillcrest …	Prince George’s County	Area Code 301
20747	Standard	District Heights, District Hts, Forestville	Prince George’s County	Area Code 240
20748	Standard	Temple Hills, Camp Springs, Hillcrest Heights, Hillcre…	Prince George’s County	Area Code 240
20749	PO Box	Fort Washington, Ft Washington	Prince George’s County	Area Code 240
20750	PO Box	Oxon Hill	Prince George’s County	Area Code 240
20751	Standard	Deale	Anne Arundel County	Area Code 410
20752	PO Box	Suitland	Prince George’s County	Area Code 240
20753	PO Box	District Heights, District Hts	Prince George’s County	Area Code 240
20754	Standard	Dunkirk	Calvert County	20755
20755	Standard	Fort George G Meade, Fort Meade	Anne Arundel County	Area Code 410
20757	PO Box	Temple Hills	Prince George’s County	Area Code 240
20758	Standard	Friendship	Anne Arundel County	Area Code 410
20759	Standard	Fulton	Howard County	Area Code 410
20762	Standard	Andrews Air Force Base, Andrews AFB, Jb Andrews	Prince George’s County	Area Code 240
20763	Standard	Savage	Howard County	Area Code 410
20764	Standard	Shady Side	Anne Arundel County	Area Code 410
20765	PO Box	Galesville	Anne Arundel County	Area Code 410
20768	PO Box	Greenbelt	Prince George’s County	Area Code 240
20769	Standard	Glenn Dale	Prince George’s County	Area Code 240
20770	Standard	Greenbelt	Prince George’s County	Area Code 240
20771	Unique	Greenbelt	Prince George’s County	Area Code 240
20772	Standard	Upper Marlboro, Uppr Marlboro	Prince George’s County	Area Code 240
20773	PO Box	Upper Marlboro, Uppr Marlboro	Prince George’s County	Area Code 240
20774	Standard	Upper Marlboro, Glenarden, Kettering, Largo, Springdale,…	Prince George’s County	Area Code 240
20775	PO Box	Upper Marlboro, Uppr Marlboro	Prince George’s County	Area Code 240
20776	Standard	Harwood	Anne Arundel County	Area Code 410
20777	Standard	Highland	Howard County	Area Code 240
20778	Standard	West River	Anne Arundel County	Area Code 410
20779	Standard	Tracys Landing, Tracys Lndg	Anne Arundel County	Area Code 410
20781	Standard	Hyattsville	Prince George’s County	Area Code 240
20782	Standard	Hyattsville, Chillum, University Pa, University Park,…	Prince George’s County	Area Code 240
20783	Standard	Hyattsville, Adelphi	Prince George’s County	Area Code 301
20784	Standard	Hyattsville, Cheverly, Landover Hills, Landover Hls, …	Prince George’s County	Area Code 301
20785	Standard	Hyattsville, Cheverly, Landover, N Englewood, North E…	Prince George’s County	Area Code 240
20787	PO Box	Hyattsville, Langley Park	Prince George’s County	Area Code 240
20788	PO Box	Hyattsville, W Hyattsville	Prince George’s County	Area Code 240
20790	Unique	Capitol Heights, Capitol Hgts	Prince George’s County	Area Code 240
20791	PO Box	Capitol Heights, Capitol Hgts	Prince George’s County	Area Code 240
20792	PO Box	Upper Marlboro, Largo, Uppr Marlboro	Prince George’s County	Area Code 240
20794	Standard	Jessup	Howard County	Area Code 410
20797	Unique	Southern Md Facility, Sthrn Md Fac	Prince George’s County	Area Code 240
20799	Unique	Capitol Heights, Capitol Hgts	Prince George’s County	Area Code 240
20810	Unique	Bethesda	Montgomery County	Area Code 240
20811	Unique	Bethesda	Montgomery County	Area Code 240
20812	Standard	Glen Echo	Montgomery County	Area Code 240
20813	PO Box	Bethesda	Montgomery County	Area Code 240
20814	Standard	Bethesda	Montgomery County	Area Code 301
20815	Standard	Chevy Chase, Bethesda, Chevy Chase Village, Chevy Chs…	Montgomery County	Area Code 240
20816	Standard	Bethesda	Montgomery County	Area Code 301
20817	Standard	Bethesda, Westlake	Montgomery County	Area Code 240
20818	Standard	Cabin John	Montgomery County	Area Code 301
20824	PO Box	Bethesda	Montgomery County	Area Code 240
20825	PO Box	Chevy Chase, Bethesda	Montgomery County	Area Code 240
20827	PO Box	Bethesda, W Bethesda, Westlake	Montgomery County	Area Code 240
20830	PO Box	Olney	Montgomery County	Area Code 240
20832	Standard	Olney	Montgomery County	Area Code 240
20833	Standard	Brookeville	Montgomery County	20837
20837	Standard	Poolesville	Montgomery County	Area Code 240
20838	Standard	Barnesville	Montgomery County	Area Code 240
20839	Standard	Beallsville	Montgomery County	Area Code 240
20841	Standard	Boyds	Montgomery County	Area Code 240
20842	Standard	Dickerson	Montgomery County	20847
20847	PO Box	Rockville	Montgomery County	Area Code 240
20848	PO Box	Rockville	Montgomery County	Area Code 240
20849	PO Box	Rockville	Montgomery County	Area Code 240
20850	Standard	Rockville, Potomac	Montgomery County	Area Code 240
20851	Standard	Rockville	Montgomery County	Area Code 240
20852	Standard	Rockville, N Bethesda, North Bethesda	Montgomery County	Area Code 240
20853	Standard	Rockville	Montgomery County	Area Code 240
20854	Standard	Potomac, Rockville	Montgomery County	Area Code 301
20855	Standard	Derwood, Rockville	Montgomery County	Area Code 240
20857	Unique	Rockville	Montgomery County	Area Code 240
20859	PO Box	Potomac, Rockville	Montgomery County	Area Code 240
20860	Standard	Sandy Spring	Montgomery County	Area Code 240
20861	Standard	Ashton	Montgomery County	Area Code 240
20862	Standard	Brinklow	Montgomery County	Area Code 240
20866	Standard	Burtonsville	Montgomery County	Area Code 301
20868	Standard	Spencerville	Montgomery County	Area Code 301
20871	Standard	Clarksburg, Hyattstown	Montgomery County	Area Code 301
20872	Standard	Damascus	Montgomery County	Area Code 240
20874	Standard	Germantown, Darnestown	Montgomery County	Area Code 240
20875	PO Box	Germantown	Montgomery County	Area Code 240
20876	Standard	Germantown	Montgomery County	Area Code 240
20877	Standard	Gaithersburg, Montgomery Village, Montgomry Vlg	Montgomery County	Area Code 301
20878	Standard	Gaithersburg, Darnestown, N Potomac, No Potomac, North…	Montgomery County	Area Code 240
20879	Standard	Gaithersburg, Montgomery Village, Montgomry Vlg	Montgomery County	Area Code 240
20880	PO Box	Washington Grove, Washingtn Grv	Montgomery County	Area Code 240
20882	Standard	Gaithersburg, Brookeville, Laytonsville	Montgomery County	Area Code 240
20883	PO Box	Gaithersburg	Montgomery County	Area Code 240
20884	PO Box	Gaithersburg	Montgomery County	Area Code 240
20885	PO Box	Gaithersburg	Montgomery County	Area Code 240
20886	Standard	Montgomery Village, Gaithersburg, Montgomry Vlg	Montgomery County	Area Code 240
20889	Unique	Bethesda	Montgomery County	Area Code 240
20891	PO Box	Kensington	Montgomery County	Area Code 240
20892	Unique	Bethesda	Montgomery County	Area Code 240
20894	Unique	Bethesda	Montgomery County	Area Code 240
20895	Standard	Kensington	Montgomery County	Area Code 301
20896	PO Box	Garrett Park	Montgomery County	Area Code 240
20897	Unique	Suburb Maryland Fac, Subn Md Fac	Montgomery County	Area Code 240
20898	PO Box	Gaithersburg	Montgomery County	Area Code 240
20899	Unique	Gaithersburg	Montgomery County	Area Code 240
20901	Standard	Silver Spring, Takoma Park	Montgomery County	Area Code 240
20902	Standard	Silver Spring, Wheaton	Montgomery County	Area Code 240
20903	Standard	Silver Spring	Montgomery County	Area Code 301
20904	Standard	Silver Spring, Colesville	Montgomery County	Area Code 301
20905	Standard	Silver Spring, Colesville, Sandy Spring	Montgomery County	Area Code 301
20906	Standard	Silver Spring, Aspen Hill	Montgomery County	Area Code 301
20907	PO Box	Silver Spring	Montgomery County	Area Code 240
20908	PO Box	Silver Spring	Montgomery County	Area Code 240
20910	Standard	Silver Spring	Montgomery County	Area Code 240
20911	PO Box	Silver Spring	Montgomery County	Area Code 240
20912	Standard	Takoma Park, Silver Spring	Montgomery County	Area Code 240
20913	PO Box	Takoma Park, Silver Spring	Montgomery County	Area Code 240
20914	PO Box	Silver Spring, Colesville	Montgomery County	Area Code 240
20915	PO Box	Silver Spring, Wheaton	Montgomery County	Area Code 240
20916	PO Box	Silver Spring, Aspen Hill	Montgomery County	Area Code 240
20918	PO Box	Silver Spring	Montgomery County	Area Code 240
20993	Unique	Silver Spring	Montgomery County	Area Code 240
20997	Unique	Silver Spring	Montgomery County	Area Code 240
21001	Standard	Aberdeen	Harford County	Area Code 410
21005	Standard	Aberdeen Proving Ground, Aber Prov Grd	Harford County	Area Code 443
21009	Standard	Abingdon	Harford County	Area Code 410
21010	Standard	Gunpowder, Aber Prov Grd, Aberdeen Proving Ground	Harford County	Area Code 410
21012	Standard	Arnold	Anne Arundel County	Area Code 410
21013	Standard	Baldwin	Baltimore County	21014
21014	Standard	Bel Air	Harford County	Area Code 410
21015	Standard	Bel Air	Harford County	Area Code 410
21017	Standard	Belcamp	Harford County	Area Code 410
21018	PO Box	Benson	Harford County	Area Code 410
21020	PO Box	Boring	Baltimore County	Area Code 410
21022	PO Box	Brooklandville, Brooklandvl	Baltimore County	Area Code 410
21023	PO Box	Butler	Baltimore County	Area Code 410
21027	PO Box	Chase	Baltimore County	Area Code 410
21028	Standard	Churchville	Harford County	Area Code 410
21029	Standard	Clarksville	Howard County	Area Code 240
21030	Standard	Cockeysville, Cockysvil, Hunt Valley	Baltimore County	Area Code 410
21031	Standard	Hunt Valley	Baltimore County	Area Code 443
21032	Standard	Crownsville	Anne Arundel County	Area Code 410
21034	Standard	Darlington	Harford County	Area Code 410
21035	Standard	Davidsonville	Anne Arundel County	Area Code 410
21036	Standard	Dayton	Howard County	Area Code 240
21037	Standard	Edgewater	Anne Arundel County	Area Code 301
21040	Standard	Edgewood	Harford County	Area Code 410
21041	PO Box	Ellicott City	Howard County	Area Code 410
21042	Standard	Ellicott City	Howard County	Area Code 410
21043	Standard	Ellicott City, Daniels, Ilchester, Oella	Howard County	Area Code 410
21044	Standard	Columbia	Howard County	Area Code 240
21045	Standard	Columbia	Howard County	Area Code 240
21046	Standard	Columbia	Howard County	Area Code 301
21047	Standard	Fallston	Harford County	Area Code 410
21048	Standard	Finksburg, Patapsco	Carroll County	Area Code 443
21050	Standard	Forest Hill	Harford County	Area Code 410
21051	Standard	Fork	Baltimore County	Area Code 410
21052	PO Box	Fort Howard	Baltimore County	Area Code 410
21053	Standard	Freeland	Baltimore County	Area Code 410
21054	Standard	Gambrills	Anne Arundel County	Area Code 240
21056	PO Box	Gibson Island	Anne Arundel County	Area Code 410
21057	Standard	Glen Arm	Baltimore County	Area Code 410
21060	Standard	Glen Burnie	Anne Arundel County	Area Code 443
21061	Standard	Glen Burnie	Anne Arundel County	Area Code 410
21062	Unique	Glen Burnie	Anne Arundel County	Area Code 410
21065	Unique	Hunt Valley, Cockys Ht Vly	Baltimore County	Area Code 410
21071	PO Box	Glyndon	Baltimore County	Area Code 410
21074	Standard	Hampstead, Greenmount	Carroll County	Area Code 410
21075	Standard	Elkridge	Howard County	Area Code 240
21076	Standard	Hanover	Anne Arundel County	Area Code 443
21077	Standard	Harmans	Anne Arundel County	Area Code 443
21078	Standard	Havre De Grace, Hvre De Grace	Harford County	Area Code 667
21082	Standard	Hydes	Baltimore County	Area Code 410
21084	Standard	Jarrettsville	Harford County	Area Code 410
21085	Standard	Joppa	Harford County	Area Code 443
21087	Standard	Kingsville, Bradshaw	Baltimore County	21088
21088	PO Box	Lineboro, Manchester	Carroll County	Area Code 410
21090	Standard	Linthicum Heights, Linthicum, Linthicum Hts	Anne Arundel County	Area Code 443
21092	PO Box	Long Green	Baltimore County	Area Code 410
21093	Standard	Lutherville Timonium, Lutherville, Luthvle Timon, Timonium	Baltimore County	Area Code 410
21094	PO Box	Lutherville Timonium, Lutherville, Luthvle Timon, Timonium	Baltimore County	Area Code 410
21098	Unique	Hanover, Household Bank	Anne Arundel County	Area Code 410
21102	Standard	Manchester, Lineboro, Millers	Carroll County	Area Code 410
21104	Standard	Marriottsville, Henryton, Marriottsvl, Woodstock	Carroll County	21105
21105	PO Box	Maryland Line	Baltimore County	Area Code 410
21106	PO Box	Mayo	Anne Arundel County	Area Code 410
21108	Standard	Millersville	Anne Arundel County	Area Code 410
21111	Standard	Monkton, Hereford	Baltimore County	21113
21113	Standard	Odenton	Anne Arundel County	Area Code 240
21114	Standard	Crofton	Anne Arundel County	Area Code 240
21117	Standard	Owings Mills, Garrison	Baltimore County	Area Code 410
21120	Standard	Parkton, Bentley Spgs, Bentley Springs	Baltimore County	Area Code 410
21122	Standard	Pasadena, Lake Shore, Riviera Beach	Anne Arundel County	Area Code 410
21123	PO Box	Pasadena, Lake Shore, Riviera Beach	Anne Arundel County	Area Code 410
21128	Standard	Perry Hall	Baltimore County	Area Code 410
21130	PO Box	Perryman	Harford County	Area Code 410
21131	Standard	Phoenix, Jacksonville	Baltimore County	Area Code 410
21132	Standard	Pylesville	Harford County	Area Code 410
21133	Standard	Randallstown, Mcdonogh Run	Baltimore County	Area Code 410
21136	Standard	Reisterstown, Glyndon	Baltimore County	Area Code 410
21139	PO Box	Riderwood	Baltimore County	Area Code 410
21140	Standard	Riva	Anne Arundel County	Area Code 301
21144	Standard	Severn	Anne Arundel County	Area Code 410
21146	Standard	Severna Park	Anne Arundel County	Area Code 410
21150	PO Box	Simpsonville	Howard County	Area Code 410
21152	Standard	Sparks Glencoe, Glencoe, Sparks, Sparks Glenco	Baltimore County	Area Code 410
21153	PO Box	Stevenson	Baltimore County	Area Code 410
21154	Standard	Street	Harford County	Area Code 410
21155	Standard	Upperco, Fowbelsburg	Baltimore County	21156
21156	Standard	Upper Falls	Baltimore County	Area Code 410
21157	Standard	Westminster	Carroll County	Area Code 410
21158	Standard	Westminster	Carroll County	Area Code 410
21160	Standard	Whiteford, Cardiff	Harford County	Area Code 410
21161	Standard	White Hall	Harford County	21162
21162	Standard	White Marsh	Baltimore County	Area Code 443
21163	Standard	Woodstock, Granite	Howard County	21201
21201	Standard	Baltimore	Baltimore city	Area Code 410
21202	Standard	Baltimore, East Case	Baltimore city	Area Code 301
21203	PO Box	Baltimore	Baltimore City	Area Code 410
21204	Standard	Towson, Baltimore, Eudowood, Loch Raven, Ruxton	Baltimore County	Area Code 410
21205	Standard	Baltimore	Baltimore city	Area Code 410
21206	Standard	Baltimore, Raspeburg	Baltimore city	Area Code 410
21207	Standard	Gwynn Oak, Baltimore, Pikesville, Woodlawn	Baltimore County	Area Code 667
21208	Standard	Pikesville, Baltimore	Baltimore County	Area Code 410
21209	Standard	Baltimore, Mount Washington, Mt Washington	Baltimore County	Area Code 410
21210	Standard	Baltimore, Roland Park	Baltimore city	Area Code 443
21211	Standard	Baltimore	Baltimore city	Area Code 410
21212	Standard	Baltimore, Govans	Baltimore city	Area Code 410
21213	Standard	Baltimore, Clifton	Baltimore city	Area Code 410
21214	Standard	Baltimore	Baltimore city	Area Code 443
21215	Standard	Baltimore, Arlington	Baltimore city	Area Code 410
21216	Standard	Baltimore	Baltimore city	Area Code 410
21217	Standard	Baltimore, Druid	Baltimore city	Area Code 410
21218	Standard	Baltimore	Baltimore city	Area Code 443
21219	Standard	Sparrows Point, Baltimore, Edgemere, Sparrows Pt	Baltimore County	Area Code 410
21220	Standard	Middle River, Baltimore	Baltimore County	Area Code 410
21221	Standard	Essex, Baltimore	Baltimore County	Area Code 410
21222	Standard	Dundalk, Baltimore	Baltimore County	Area Code 410
21223	Standard	Baltimore, Franklin	Baltimore city	Area Code 667
21224	Standard	Baltimore, Highlandtown	Baltimore city	Area Code 410
21225	Standard	Brooklyn, Baltimore, Brooklyn Park	Baltimore city	Area Code 410
21226	Standard	Curtis Bay, Baltimore, Carvel Beach, Chestnut Hill C…	Anne Arundel County	Area Code 410
21227	Standard	Halethorpe, Arbutus, Baltimore, Lansdowne	Baltimore County	Area Code 240
21228	Standard	Catonsville, Baltimore	Baltimore County	Area Code 410
21229	Standard	Baltimore, Carroll	Baltimore city	Area Code 410
21230	Standard	Baltimore	Baltimore city	Area Code 410
21231	Standard	Baltimore	Baltimore city	Area Code 410
21233	Standard	Baltimore	Baltimore City	Area Code 410
21234	Standard	Parkville, Baltimore	Baltimore County	Area Code 410
21235	Unique	Baltimore	Baltimore City	Area Code 410
21236	Standard	Nottingham, Baltimore	Baltimore County	Area Code 410
21237	Standard	Rosedale, Baltimore	Baltimore County	Area Code 410
21239	Standard	Baltimore, Idlewylde, Loch Hill, Northwood	Baltimore city	Area Code 443
21240	Standard	Baltimore, Millersville	Anne Arundel County	Area Code 240
21241	Unique	Baltimore	Baltimore City	Area Code 410
21244	Standard	Windsor Mill, Baltimore	Baltimore County	Area Code 410
21250	Unique	Baltimore	Baltimore County	Area Code 410
21251	Unique	Baltimore	Baltimore city	Area Code 410
21252	Unique	Towson, Baltimore	Baltimore County	Area Code 410
21260	Standard	Baltimore	Baltimore City	Area Code 410
21261	Standard	Baltimore, Essex	Baltimore City	Area Code 410
21263	Unique	Baltimore	Baltimore City	Area Code 410
21264	Unique	Baltimore	Baltimore City	Area Code 410
21265	Unique	Baltimore	Baltimore City	Area Code 410
21268	Unique	Baltimore	Baltimore City	Area Code 410
21270	PO Box	Baltimore	Baltimore City	Area Code 410
21273	Unique	Baltimore	Baltimore City	Area Code 410
21274	Unique	Baltimore	Baltimore City	Area Code 410
21275	Unique	Baltimore	Baltimore City	Area Code 410
21278	Unique	Baltimore	Baltimore City	Area Code 410
21279	Unique	Baltimore	Baltimore City	Area Code 410
21280	Unique	Baltimore	Baltimore City	Area Code 410
21281	PO Box	Baltimore	Baltimore City	Area Code 410
21282	PO Box	Pikesville, Baltimore	Baltimore City	Area Code 410
21283	Unique	Baltimore, Shared Firm Zip Code	Baltimore City	Area Code 410
21284	PO Box	Towson, Baltimore, Loch Raven	Baltimore City	Area Code 410
21285	PO Box	Towson, Baltimore	Baltimore City	Area Code 410
21286	Standard	Towson, Baltimore, Loch Raven	Baltimore County	Area Code 667
21287	Standard	Baltimore	Baltimore City	Area Code 410
21288	Unique	Baltimore	Baltimore City	Area Code 410
21289	Unique	Baltimore	Baltimore City	Area Code 410
21290	Unique	Baltimore	Baltimore City	Area Code 410
21297	PO Box	Baltimore	Baltimore City	Area Code 410
21298	Unique	Baltimore	Baltimore City	Area Code 410
21401	Standard	Annapolis, Cape Saint Claire, Cpe St Claire	Anne Arundel County	Area Code 410
21402	Standard	Annapolis, N Severn Vlg, Naval Academy, North Sever…	Anne Arundel County	Area Code 410
21403	Standard	Annapolis, Highland Bch	Anne Arundel County	Area Code 301
21404	PO Box	Annapolis	Anne Arundel County	Area Code 410
21405	Standard	Annapolis, Sherwood Forest, Sherwood Frst	Anne Arundel County	Area Code 301
21409	Standard	Annapolis	Anne Arundel County	Area Code 443
21411	Unique	Annapolis	Anne Arundel County	Area Code 410
21412	Standard	Annapolis	Anne Arundel County	Area Code 410
21501	PO Box	Cumberland	Allegany County	Area Code 240
21502	Standard	Cumberland, Cresaptown, Lavale	Allegany County	Area Code 240
21503	PO Box	Cumberland	Allegany County	Area Code 240
21504	PO Box	Cumberland, Lavale	Allegany County	Area Code 240
21505	PO Box	Cumberland, Cresaptown	Allegany County	Area Code 240
21520	Standard	Accident	Garrett County	Area Code 301
21521	Standard	Barton	Allegany County	21522
21522	Standard	Bittinger	Garrett County	Area Code 301
21523	Standard	Bloomington	Garrett County	Area Code 240
21524	PO Box	Corriganville	Allegany County	Area Code 240
21528	PO Box	Eckhart Mines	Allegany County	Area Code 240
21529	PO Box	Ellerslie	Allegany County	Area Code 240
21530	Standard	Flintstone	Allegany County	Area Code 240
21531	Standard	Friendsville	Garrett County	Area Code 301
21532	Standard	Frostburg	Allegany County	Area Code 240
21536	Standard	Grantsville, Jennings	Garrett County	Area Code 240
21538	Standard	Kitzmiller, Shallmar	Garrett County	Area Code 301
21539	Standard	Lonaconing	Allegany County	Area Code 301
21540	Standard	Luke, Westernport	Allegany County	Area Code 301
21541	Standard	Mc Henry, Sang Run	Garrett County	Area Code 301
21542	PO Box	Midland	Allegany County	Area Code 240
21543	PO Box	Midlothian	Allegany County	Area Code 240
21545	Standard	Mount Savage	Allegany County	Area Code 301
21550	Standard	Oakland, Crellin, Deer Park, Hutton, Loch Lyn Hgh…	Garrett County	Area Code 240
21555	Standard	Oldtown	Allegany County	Area Code 301
21556	PO Box	Pinto	Allegany County	Area Code 240
21557	Standard	Rawlings	Allegany County	Area Code 240
21560	PO Box	Spring Gap	Mineral County	Area Code 240
21561	Standard	Swanton	Garrett County	Area Code 301
21562	Standard	Westernport, Mccoole	Allegany County	Area Code 301
21601	Standard	Easton	Talbot County	Area Code 410
21606	Unique	Easton, First Fulfillment & Mgr Co	Talbot County	Area Code 410
21607	Standard	Barclay	Queen Anne’s County	Area Code 410
21609	PO Box	Bethlehem	Caroline County	Area Code 410
21610	Standard	Betterton	Kent County	Area Code 410
21612	Standard	Bozman	Talbot County	Area Code 410
21613	Standard	Cambridge	Dorchester County	Area Code 410
21617	Standard	Centreville	Queen Anne’s County	Area Code 410
21619	Standard	Chester	Queen Anne’s County	Area Code 410
21620	Standard	Chestertown	Kent County	Area Code 410
21622	Standard	Church Creek	Dorchester County	Area Code 410
21623	Standard	Church Hill	Queen Anne’s County	Area Code 410
21624	PO Box	Claiborne	Talbot County	Area Code 410
21625	Standard	Cordova	Talbot County	Area Code 410
21626	Standard	Crapo	Dorchester County	Area Code 410
21627	Standard	Crocheron	Dorchester County	Area Code 410
21628	PO Box	Crumpton	Queen Anne’s County	Area Code 410
21629	Standard	Denton	Caroline County	Area Code 410
21631	Standard	East New Market, E New Market	Dorchester County	Area Code 410
21632	Standard	Federalsburg	Caroline County	Area Code 410
21634	Standard	Fishing Creek	Dorchester County	Area Code 410
21635	Standard	Galena, Golts	Kent County	Area Code 410
21636	Standard	Goldsboro	Caroline County	Area Code 410
21638	Standard	Grasonville	Queen Anne’s County	Area Code 410
21639	Standard	Greensboro	Caroline County	Area Code 410
21640	Standard	Henderson	Caroline County	Area Code 410
21641	PO Box	Hillsboro	Caroline County	Area Code 410
21643	Standard	Hurlock	Dorchester County	Area Code 410
21644	Standard	Ingleside	Queen Anne’s County	Area Code 410
21645	Standard	Kennedyville	Kent County	Area Code 410
21647	Standard	Mcdaniel	Talbot County	Area Code 410
21648	Standard	Madison	Dorchester County	Area Code 410
21649	Standard	Marydel	Caroline County	Area Code 410
21650	Standard	Massey	Kent County	Area Code 410
21651	Standard	Millington	Kent County	Area Code 410
21652	PO Box	Neavitt	Talbot County	Area Code 410
21653	PO Box	Newcomb	Talbot County	Area Code 410
21654	Standard	Oxford	Talbot County	Area Code 410
21655	Standard	Preston	Caroline County	Area Code 410
21656	PO Box	Price, Church Hill	Queen Anne’s County	Area Code 410
21657	Standard	Queen Anne	Queen Anne’s County	Area Code 410
21658	Standard	Queenstown	Queen Anne’s County	Area Code 410
21659	Standard	Rhodesdale, Brookview, Eldorado, Galestown	Dorchester County	Area Code 410
21660	Standard	Ridgely	Caroline County	Area Code 410
21661	Standard	Rock Hall	Kent County	Area Code 410
21662	Standard	Royal Oak	Talbot County	Area Code 410
21663	Standard	Saint Michaels, St Michaels	Talbot County	Area Code 410
21664	PO Box	Secretary	Dorchester County	Area Code 410
21665	Standard	Sherwood	Talbot County	Area Code 410
21666	Standard	Stevensville	Queen Anne’s County	Area Code 410
21667	Standard	Still Pond	Kent County	Area Code 410
21668	Standard	Sudlersville	Queen Anne’s County	Area Code 410
21669	PO Box	Taylors Island, Taylors Is	Dorchester County	Area Code 410
21670	PO Box	Templeville	Caroline County	Area Code 410
21671	Standard	Tilghman	Talbot County	Area Code 410
21672	Standard	Toddville	Dorchester County	Area Code 410
21673	Standard	Trappe	Talbot County	Area Code 410
21675	Standard	Wingate	Dorchester County	Area Code 410
21676	Standard	Wittman	Talbot County	Area Code 410
21677	Standard	Woolford	Dorchester County	Area Code 410
21678	Standard	Worton, Lynch	Kent County	Area Code 410
21679	Standard	Wye Mills	Talbot County	Area Code 410
21681	Unique	Ridgely	Caroline County	Area Code 410
21682	Unique	Ridgely	Caroline County	Area Code 410
21683	Unique	Ridgely	Caroline County	Area Code 410
21684	Unique	Ridgely	Caroline County	Area Code 410
21685	Unique	Ridgely	Caroline County	Area Code 410
21686	Unique	Ridgely	Caroline County	Area Code 410
21687	Unique	Ridgely	Caroline County	Area Code 410
21688	Unique	Ridgely	Caroline County	Area Code 410
21690	Unique	Chestertown	Kent County	Area Code 410
21701	Standard	Frederick, Lewistown	Frederick County	Area Code 240
21702	Standard	Frederick, Fort Detrick	Frederick County	Area Code 240
21703	Standard	Frederick	Frederick County	Area Code 301
21704	Standard	Frederick, Urbana	Frederick County	Area Code 301
21705	PO Box	Frederick	Frederick County	Area Code 240
21709	Unique	Frederick	Frederick County	Area Code 240
21710	Standard	Adamstown, Doubs	Frederick County	Area Code 240
21711	Standard	Big Pool	Washington County	Area Code 240
21713	Standard	Boonsboro	Washington County	Area Code 240
21714	PO Box	Braddock Heights, Braddock Hts	Frederick County	Area Code 240
21715	PO Box	Brownsville	Washington County	Area Code 240
21716	Standard	Brunswick	Frederick County	Area Code 301
21717	PO Box	Buckeystown	Frederick County	Area Code 240
21718	Standard	Burkittsville	Frederick County	Area Code 240
21719	Standard	Cascade, Fort Ritchie, Highfield	Washington County	Area Code 240
21720	PO Box	Cavetown	Washington County	Area Code 240
21721	PO Box	Chewsville	Washington County	Area Code 240
21722	Standard	Clear Spring, Big Spring	Washington County	Area Code 301
21723	Standard	Cooksville	Howard County	Area Code 410
21727	Standard	Emmitsburg	Frederick County	Area Code 240
21733	Standard	Fairplay, St James	Washington County	Area Code 240
21734	PO Box	Funkstown	Washington County	Area Code 240
21737	Standard	Glenelg	Howard County	Area Code 410
21738	Standard	Glenwood	Howard County	Area Code 410
21740	Standard	Hagerstown	Washington County	Area Code 240
21741	PO Box	Hagerstown	Washington County	Area Code 240
21742	Standard	Hagerstown	Washington County	Area Code 240
21746	Unique	Hagerstown	Washington County	Area Code 240
21747	PO Box	Hagerstown	Washington County	Area Code 240
21748	Unique	Hagerstown	Washington County	Area Code 240
21749	Unique	Hagerstown	Washington County	Area Code 240
21750	Standard	Hancock	Washington County	Area Code 240
21754	Standard	Ijamsville	Frederick County	Area Code 240
21755	Standard	Jefferson	Frederick County	Area Code 240
21756	Standard	Keedysville	Washington County	Area Code 301
21757	Standard	Keymar, Detour, Middleburg	Frederick County	21758
21758	Standard	Knoxville, Brunswick	Frederick County	Area Code 301
21759	PO Box	Ladiesburg	Frederick County	Area Code 240
21762	PO Box	Libertytown	Frederick County	Area Code 240
21765	PO Box	Lisbon	Howard County	Area Code 410
21766	Standard	Little Orleans, Ltl Orleans	Allegany County	Area Code 240
21767	Standard	Maugansville	Washington County	Area Code 240
21769	Standard	Middletown	Frederick County	Area Code 240
21770	Standard	Monrovia	Frederick County	Area Code 240
21771	Standard	Mount Airy	Frederick County	Area Code 240
21773	Standard	Myersville	Frederick County	Area Code 240
21774	Standard	New Market	Frederick County	Area Code 301
21775	PO Box	New Midway	Frederick County	Area Code 240
21776	Standard	New Windsor	Carroll County	Area Code 410
21777	Standard	Point Of Rocks, Pt Of Rocks	Frederick County	Area Code 240
21778	Standard	Rocky Ridge	Frederick County	Area Code 240
21779	Standard	Rohrersville, Gapland	Washington County	Area Code 240
21780	Standard	Sabillasville	Frederick County	Area Code 240
21781	PO Box	Saint James	Washington County	Area Code 240
21782	Standard	Sharpsburg	Washington County	Area Code 240
21783	Standard	Smithsburg	Washington County	Area Code 240
21784	Standard	Sykesville, Eldersburg, Gaither	Carroll County	Area Code 410
21787	Standard	Taneytown	Carroll County	Area Code 410
21788	Standard	Thurmont, Graceham	Frederick County	Area Code 240
21790	Standard	Tuscarora	Frederick County	Area Code 240
21791	Standard	Union Bridge, Linwood	Carroll County	Area Code 410
21792	PO Box	Unionville	Frederick County	Area Code 240
21793	Standard	Walkersville	Frederick County	Area Code 301
21794	Standard	West Friendship, W Friendship	Howard County	Area Code 410
21795	Standard	Williamsport	Washington County	Area Code 240
21797	Standard	Woodbine	Howard County	21798
21798	Standard	Woodsboro	Frederick County	Area Code 240
21801	Standard	Salisbury	Wicomico County	Area Code 443
21802	PO Box	Salisbury	Wicomico County	Area Code 410
21803	PO Box	Salisbury	Wicomico County	Area Code 410
21804	Standard	Salisbury	Wicomico County	Area Code 410
21810	PO Box	Allen	Wicomico County	Area Code 410
21811	Standard	Berlin, Ocean Pines, Ocean Pnes	Worcester County	Area Code 410
21813	Standard	Bishopville	Worcester County	Area Code 410
21814	Standard	Bivalve	Wicomico County	Area Code 410
21817	Standard	Crisfield	Somerset County	Area Code 410
21821	Standard	Deal Island, Chance, Dames Quarter, Wenona	Somerset County	Area Code 410
21822	Standard	Eden	Somerset County	21824
21824	Standard	Ewell	Somerset County	Area Code 410
21826	Standard	Fruitland	Wicomico County	Area Code 410
21829	Standard	Girdletree	Worcester County	Area Code 410
21830	Standard	Hebron	Wicomico County	Area Code 410
21835	Standard	Linkwood	Dorchester County	Area Code 410
21836	PO Box	Manokin	Somerset County	Area Code 410
21837	Standard	Mardela Springs, Mardela, Mardela Spgs	Wicomico County	Area Code 410
21838	Standard	Marion Station, Marion, Marion Sta	Somerset County	Area Code 410
21840	Standard	Nanticoke	Wicomico County	Area Code 410
21841	Standard	Newark	Worcester County	Area Code 410
21842	Standard	Ocean City	Worcester County	Area Code 410
21843	PO Box	Ocean City	Worcester County	Area Code 410
21849	Standard	Parsonsburg	Wicomico County	Area Code 410
21850	Standard	Pittsville	Wicomico County	Area Code 410
21851	Standard	Pocomoke City	Worcester County	Area Code 410
21852	PO Box	Powellville	Wicomico County	Area Code 410
21853	Standard	Princess Anne	Somerset County	Area Code 410
21856	Standard	Quantico	Wicomico County	Area Code 410
21857	PO Box	Rehobeth	Somerset County	Area Code 410
21861	PO Box	Sharptown	Wicomico County	Area Code 410
21862	Standard	Showell	Worcester County	Area Code 410
21863	Standard	Snow Hill	Worcester County	Area Code 410
21864	Standard	Stockton	Worcester County	Area Code 410
21865	Standard	Tyaskin	Wicomico County	Area Code 410
21866	PO Box	Tylerton	Somerset County	Area Code 410
21867	PO Box	Upper Fairmount, Fairmount, Upper Fairmt, Upper Hill	Somerset County	Area Code 410
21869	Standard	Vienna	Dorchester County	Area Code 410
21871	Standard	Westover	Somerset County	Area Code 410
21872	Standard	Whaleyville	Worcester County	Area Code 410
21874	Standard	Willards	Wicomico County	Area Code 410
21875	Standard	Delmar	Wicomico County	Area Code 410
21890	Unique	Westover	Somerset County	Area Code 410
21901	Standard	North East	Cecil County	Area Code 410
21902	PO Box	Perry Point	Cecil County	Area Code 410
21903	Standard	Perryville	Cecil County	Area Code 410
21904	Standard	Port Deposit, Bainbridge	Cecil County	Area Code 410
21911	Standard	Rising Sun	Cecil County	Area Code 410
21912	Standard	Warwick	Cecil County	Area Code 410
21913	PO Box	Cecilton	Cecil County	Area Code 410
21914	PO Box	Charlestown	Cecil County	Area Code 410
21915	Standard	Chesapeake City, Chesapeake Cy	Cecil County	Area Code 443
21916	PO Box	Childs	Cecil County	Area Code 410
21917	Standard	Colora	Cecil County	Area Code 410
21918	Standard	Conowingo	Cecil County	Area Code 410
21919	Standard	Earleville	Cecil County	Area Code 410
21920	PO Box	Elk Mills	Cecil County	Area Code 410
21921	Standard	Elkton	Cecil County	Area Code 410
21922	PO Box	Elkton	Cecil County	Area Code 410
21930	PO Box	Georgetown	Cecil County	Area Code 410

In the beginning the Zip code consisted of only two digits, first was used for the city and the second used to tell about the state. But with the increased demand of delivery the digits of Zip code also increased and became five. The United States of America possesses one of the most mature addressing systems in the world with one of the most developed postal code systems- The ZIP code.The ZIP code organizes the vast geography of The United States of America into well- defined areas for the purpose of efficient mail delivery. The ZIP code grew beyond its use as a mail delivery facilitator into improving the national infrastructure.