Area Code 240

All Information about Area Code 240
General Information about Area Code 240
Country United States
State / Province / Territory Maryland
Major City Gaithersburg
Time Zone Eastern (UTC-05:00)

Active Prefixes in Area Code 240

Prefix Primary City County Phone Type
240-319 Columbia Howard Wireless
240-329 Hagerstown Washington Landline
240-882 District Heights Prince Georges Wireless
240-567 Rockville Montgomery Landline
240-533 Brentwood Prince Georges Landline
240-638 Brentwood Prince Georges Landline
240-965 Greenbelt Prince Georges Landline
240-578 Frederick Frederick Wireless
240-938 Ashton Montgomery Wireless
240-408 Rockville Montgomery Wireless
240-463 Silver Spring Montgomery Wireless
240-671 Brentwood Prince Georges Wireless
240-575 Frederick Frederick Landline
240-367 Frederick Frederick Wireless
240-530 Waldorf Charles Landline
240-438 Silver Spring Montgomery Wireless
240-618 Rockville Montgomery Wireless
240-326 Upper Marlboro Prince Georges Landline
240-519 Chevy Chase Montgomery Wireless
240-422 Frederick Frederick Wireless
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