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Maryland Area Codes

The state of Maryland, USA is currently served by a total of 6 area codes:

Overlaying area codes

These Maryland area codes overlay (cover the same geographic area). The first code listed is the parent code. Overlay area codes are added when no more phone numbers are available in an existing Numbering Plan Area.

  • 301/240/227
  • 410/443/667

Larger Maryland cities and their area codes

City CountyArea code(s)
AnnapolisAnne Arundel410/443/667
BaltimoreBaltimore City410/443/667
BethesdaMontgomery301/240/227
BowiePrince George's301/240/227
CatonsvilleBaltimore410/443/667
ClintonPrince George's301/240/227
College ParkPrince George's301/240/227
ColumbiaHoward410/443/667
DundalkBaltimore410/443/667
Ellicott CityHoward410/443/667
EssexBaltimore410/443/667
FrederickFrederick301/240/227
GaithersburgMontgomery301/240/227
GermantownMontgomery301/240/227
Glen BurnieAnne Arundel410/443/667
HagerstownWashington301/240/227
Montgomery VillageMontgomery301/240/227
OdentonAnne Arundel410/443/667
OlneyMontgomery301/240/227
Owings MillsBaltimore410/443/667
ParkvilleBaltimore410/443/667
PikesvilleBaltimore410/443/667
PotomacMontgomery301/240/227
RandallstownBaltimore410/443/667
RockvilleMontgomery301/240/227
SalisburyWicomico410/443/667
SevernAnne Arundel410/443/667
Severna ParkAnne Arundel410/443/667
Silver SpringMontgomery301/240/227
TowsonBaltimore410/443/667
WaldorfCharles301/240/227