Area code 240 was first put in service June 01, 1997. Area code 240 is in USA (Maryland). 1-800-database has 1508 records on file with a phone number in the area code of (240) and 171 comments.
The carriers providing phone numbers in 240 area code are: 365 Wireless, Allegiance Telecom, AT&T Local, Atx Telecommunications Services, Ltd, Baltimore-washington Telephone (bwt), Bandwidth.com Clec, Broadvox-clec - DC, Broadwing Communications. LLC, Cavalier East LLC, Cavalier Telephone Mid-atlantic, Cellco Partnership DBA Verizon Wireless, Centurylink Communications LLC, Comcast Phone Of Northern Maryland, Core Communications, Dslnet Communications Va, Global Crossing Local Services-md, Global Naps South, Halo Wireless Services, Leap Wireless Intl DBA Cricket Comm, Level 3 Communications, Lightwave Communications, Local Access LLC, Lumos Networks Inc. - VA, Mci Worldcom Communications, Metro PCS, Mte DBA Mte Paging Network, New Cingular Wireless PCS - DC, Omnipoint Communications Cap Operations, Paetec Communications, Paetec Communications - DC, Peerless Network Of Maryland, Peerless Network Of The District Of Columbia, Dc, Shentel Communications, Sprint Spectrum L.p., Starpower Communications, Telcove Operations, Teleport Communications America, Teleport Communications America - DC, Tw Telecom Of Maryland LLC, Uscoc Of Cumberland DBA United States Cel Md, Us Lec Of Maryland, Verizon Maryland, Xo Maryland, Ymax Communications Corp..
Counties located in area code 240 are: ALLEGANY, ANNE ARUNDEL, BALTIMORE CITY, CHARLES, DISTRICT OF COLUMBIA, FREDERICK, GARRETT, HOWARD, MINERAL, MONTGOMERY, PRINCE GEORGES, SAINT MARYS, WASHINGTON.
Largest city: Germantown
In service since: 06/01/1997
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