240 Area Code Phone Directory

Information for Area Code 240

State: MD
Largest City in Area: SILVER SPRING

Where is Area Code 240?

Area code (240) is in the state of MD. Below, are the major cities in the area code (240).

Major Cities in 240

SILVER SPRING, MD (170,781)
WASHINGTON, DC (136,922)
GAITHERSBURG, MD (125,213)
HYATTSVILLE, MD (115,832)
ROCKVILLE, MD (102,957)
LAUREL, MD (90,334)
GERMANTOWN, MD (80,333)
FREDERICK, MD (65,051)
UPPER MARLBORO, MD (65,041)
WALDORF, MD (60,608)

Zip Codes in 240