Maryland number prefixes
- Accident
- Accokeek
- Adamstown
- Adelphi
- Andrews AFB
- Antietam
- Aquasco
- Ashton-Sandy Spring
- Aspen Hill
- Baden
- Bagtown
- Bakersville
- Ballenger Creek
- Barnesville
- Barrelville
- Barton
- Bartonsville
- Beaver Creek
- Bel Air
- Beltsville
- Benedict
- Bensville
- Berwyn Heights
- Bethesda
- Bier
- Big Pool
- Big Spring
- Bladensburg
- Bloomington
- Boonsboro
- Bowie
- Bowling Green
- Bowmans Addition
- Braddock Heights
- Brandywine
- Breathedsville
- Brentwood
- Brock Hall
- Brookeville
- Brookmont
- Brownsville
- Brunswick
- Bryans Road
- Bryantown
- Buckeystown
- Burkittsville
- Burtonsville
- Cabin John
- California
- Calverton
- Camp Springs
- Capitol Heights
- Carlos
- Cavetown
- Cearfoss
- Cedarville
- Charlotte Hall
- Charlton
- Cheverly
- Chevy Chase
- Chevy Chase
- Chevy Chase Section Five
- Chevy Chase Section Three
- Chevy Chase View
- Chevy Chase Village
- Chewsville
- Chillum
- Clarksburg
- Clarysville
- Clear Spring
- Clinton
- Cloverly
- Cobb Island
- Colesville
- College Park
- Colmar Manor
- Coral Hills
- Corriganville
- Cottage City
- Crellin
- Cresaptown
- Croom
- Cumberland
- Damascus
- Danville
- Dargan
- Darnestown
- Dawson
- Deer Park
- Derwood
- Detmold
- District Heights
- Downsville
- Dunkirk
- Eagle Harbor
- Eakles Mill
- East Riverdale
- Eckhart Mines
- Edgemont
- Edmonston
- Ellerslie
- Emmitsburg
- Ernstville
- Fairland
- Fairmount Heights
- Fairplay
- Fairview
- Fairwood
- Finzel
- Flintstone
- Forest Glen
- Forest Heights
- Forestville
- Fort Ritchie
- Fort Washington
- Fountainhead-Orchard Hills
- Four Corners
- Franklin
- Frederick
- Friendly
- Friendship Heights Village
- Friendsville
- Frostburg
- Fulton
- Funkstown
- Gaithersburg
- Gapland
- Garrett Park
- Garretts Mill
- Germantown
- Gilmore
- Glassmanor
- Glenarden
- Glen Echo
- Glenmont
- Glenn Dale
- Golden Beach
- Gorman
- Grahamtown
- Grantsville
- Greenbelt
- Greensburg
- Hagerstown
- Halfway
- Hancock
- Highfield-Cascade
- Highland
- Hillandale
- Hillcrest Heights
- Hughesville
- Hutton
- Hyattsville
- Indian Head
- Indian Springs
- Jefferson
- Jennings
- Jugtown
- Keedysville
- Kemp Mill
- Kemps Mill
- Kensington
- Kettering
- Kitzmiller
- Klondike
- Konterra
- Lake Arbor
- Landover
- Landover Hills
- Langley Park
- Lanham
- La Plata
- Largo
- Laurel
- La Vale
- Layhill
- Laytonsville
- Leisure World
- Leitersburg
- Leonardtown
- Lexington Park
- Libertytown
- Linganore
- Little Orleans
- Loch Lynn Heights
- Lonaconing
- Luke
- McCoole
- Mapleville
- Marlboro Meadows
- Marlboro Village
- Marlow Heights
- Marlton
- Martin's Additions
- Maryland City
- Maugansville
- Mechanicsville
- Melwood
- Mercersville
- Middleburg
- Middletown
- Midland
- Midlothian
- Mitchellville
- Monrovia
- Montgomery Village
- Morningside
- Moscow
- Mount Aetna
- Mountain Lake Park
- Mount Airy
- Mount Briar
- Mount Lena
- Mount Rainier
- Mount Savage
- Myersville
- National
- National Harbor
- New Carrollton
- New Market
- Nikep
- North Bethesda
- North Brentwood
- North Chevy Chase
- North Kensington
- North Laurel
- North Potomac
- Oakland
- Ocean
- Oldtown
- Olney
- Oxon Hill
- Paramount-Long Meadow
- Pecktonville
- Peppermill Village
- Pinesburg
- Piney Point
- Pleasant Grove
- Point of Rocks
- Pomfret
- Pondsville
- Poolesville
- Port Tobacco Village
- Potomac
- Potomac Heights
- Potomac Park
- Queen Anne
- Queenland
- Rawlings
- Redland
- Reid
- Ringgold
- Riverdale Park
- Robinwood
- Rock Point
- Rockville
- Rohrersville
- Rosaryville
- Rosemont
- Sabillasville
- St. George Island
- St. James
- Sandy Hook
- San Mar
- Savage
- Scaggsville
- Seabrook
- Seat Pleasant
- Shaft
- Sharpsburg
- Silver Hill
- Silver Spring
- Smithsburg
- Somerset
- South Kensington
- South Laurel
- Spencerville
- Springdale
- Spring Gap
- Spring Ridge
- Suitland
- Summerfield
- Swanton
- Takoma Park
- Tall Timbers
- Temple Hills
- Thurmont
- Tilghmanton
- Travilah
- Trego-Rohrersville Station
- University Park
- Upper Marlboro
- Urbana
- Vale Summit
- Waldorf
- Walker Mill
- Walkersville
- Washington Grove
- Westernport
- West Laurel
- Westphalia
- Wheaton
- White Oak
- Williamsport
- Wilson-Conococheague
- Woodland
- Woodlawn
- Woodmore
- Woodsboro
- Yarrowsburg
- Zihlman
- Aberdeen
- Aberdeen Proving Ground
- Algonquin
- Allen
- Annapolis
- Annapolis Neck
- Arbutus
- Arden on the Severn
- Arnold
- Baltimore
- Baltimore Highlands
- Barclay
- Bel Air
- Bel Air North
- Bel Air South
- Berlin
- Betterton
- Bishopville
- Bivalve
- Bowleys Quarters
- Brooklyn Park
- Brookview
- Broomes Island
- Butlertown
- Calvert Beach
- Cambridge
- Cape St. Claire
- Carney
- Catonsville
- Cecilton
- Centreville
- Chance
- Charlestown
- Chesapeake Beach
- Chesapeake City
- Chesapeake Ranch Estates
- Chester
- Chestertown
- Choptank
- Church Creek
- Church Hill
- Cockeysville
- Columbia
- Cordova
- Crisfield
- Crofton
- Crownsville
- Dames Quarter
- Darlington
- Deale
- Deal Island
- Delmar
- Denton
- Drum Point
- Dundalk
- East New Market
- Easton
- Eden
- Edesville
- Edgemere
- Edgewater
- Edgewood
- Eldersburg
- Eldorado
- Elkridge
- Elkton
- Ellicott City
- Elliott
- Essex
- Fairlee
- Fairmount
- Fallston
- Federalsburg
- Ferndale
- Fishing Creek
- Fort Meade
- Frenchtown-Rumbly
- Friendship
- Fruitland
- Galena
- Galestown
- Galesville
- Gambrills
- Garrison
- Georgetown
- Girdletree
- Glen Burnie
- Goldsboro
- Grasonville
- Greensboro
- Hampstead
- Hampton
- Havre de Grace
- Hebron
- Henderson
- Herald Harbor
- Highland Beach
- Hillsboro
- Huntingtown
- Hurlock
- Ilchester
- Jarrettsville
- Jessup
- Jesterville
- Joppatowne
- Kennedyville
- Kent Narrows
- Kingstown
- Kingsville
- Lake Shore
- Lansdowne
- Linthicum
- Lochearn
- Long Beach
- Lusby
- Lutherville
- Madison
- Manchester
- Mardela Springs
- Marydel
- Mayo
- Mays Chapel
- Middle River
- Milford Mill
- Millington
- Mount Vernon
- Nanticoke
- Nanticoke Acres
- Naval Academy
- Newark
- New Windsor
- North Beach
- North East
- Ocean Pines
- Odenton
- Overlea
- Owings
- Owings Mills
- Oxford
- Parkville
- Parole
- Parsonsburg
- Pasadena
- Perry Hall
- Perryman
- Perryville
- Pikesville
- Pittsville
- Pleasant Hills
- Pocomoke City
- Port Deposit
- Powellville
- Preston
- Prince Frederick
- Princess Anne
- Pylesville
- Quantico
- Queen Anne
- Queenstown
- Randallstown
- Reisterstown
- Ridgely
- Rising Sun
- Riva
- Riverside
- Riviera Beach
- Rock Hall
- Rosedale
- Rossville
- St. Leonard
- St. Michaels
- Salisbury
- Secretary
- Severn
- Severna Park
- Shady Side
- Sharptown
- Smith Island
- Snow Hill
- Solomons
- Stevensville
- Stockton
- Sudlersville
- Sykesville
- Taneytown
- Taylors Island
- Templeville
- Tilghman Island
- Timonium
- Tolchester
- Towson
- Trappe
- Tyaskin
- Union Bridge
- Vienna
- Waterview
- West Denton
- Westminster
- West Ocean City
- West Pocomoke
- Whaleyville
- Whitehaven
- White Marsh
- Willards
- Williston
- Woodlawn
- Worton