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301 Area Code Phone Directory

Phone Prefixes in the 301 Area Code

(301) 2XX (301) 3XX (301) 4XX (301) 5XX (301) 6XX (301) 7XX (301) 8XX (301) 9XX

Information for Area Code 301

State: MD

Largest City in Area: SILVER SPRING

Where is Area Code 301?

Area code (301) is in the state of MD. Below, are the major cities in the area code (301).

Area Codes Starting with 3

Major Cities in 301

SILVER SPRING, MD (1,090,831)

WASHINGTON, DC (778,444)

ROCKVILLE, MD (636,049)

GAITHERSBURG, MD (566,826)

HYATTSVILLE, MD (560,589)

LAUREL, MD (445,527)

FREDERICK, MD (428,228)

BALTIMORE, MD (398,969)

BOWIE, MD (397,104)

UPPER MARLBORO, MD (394,559)

Zip Codes in 301

20601

20602

20603

20604

20606

20607

20608

20609

20611

20612

20613

20616

20617

20618

20619

20620

20621

20622

20623

20624

20625