301 Area Code Phone Directory

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).

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