Area Code 240

240 is the North American Telephone Area Code For Maryland in United States.
District of Maryland area codes: 240
Country United States
State/Province Maryland
Major City Baltimore
Time Zone Eastern

Phone directory with area code 240

Prefix County Primary City Company
240-312 Prince Georges Capitol Heights, MD Cavalier Telephone Mid-atlantic
240-313 Washington Hagerstown, MD Verizon Maryland
240-314 Montgomery Rockville, MD Verizon Maryland
240-315 Frederick Frederick, MD Verizon Maryland
240-316 Montgomery Chevy Chase, MD Sprint Spectrum L.p.
240-317 Saint Marys Callaway, MD Starpower Communications
240-318 Prince Georges Clinton, MD Verizon Maryland
240-319 Howard Columbia, MD Cellco Partnership DBA Verizon Wireless
240-320 Charles Waldorf, MD Cavalier East LLC
240-321 Garrett Oakland, MD Uscoc Of Cumberland DBA United States Cel Md
240-322 Allegany Mccoole, MD Core Communications
240-323 Frederick Emmitsburg, MD Core Communications
240-324 Howard Clarksville, MD Ymax Communications Corp.
240-325 Montgomery Damascus, MD Core Communications
240-326 Prince Georges Upper Marlboro, MD Cavalier Telephone Mid-atlantic
240-327 Montgomery Gaithersburg, MD Core Communications
240-328 Montgomery Rockville, MD Verizon Maryland
240-329 Washington Hagerstown, MD Level 3 Communications
240-330 Montgomery Cabin John, MD Sprint Spectrum L.p.
240-331 Prince Georges Mount Rainier, MD Peerless Network Of Maryland
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There are 522 prefixes, In the code area, the major cities are Aspen Hill, MD;Bethesda, MD;Bowie, MD;Chillum, MD;. The major city is Baltimore.

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