Local Calling Guide

Area code/prefix search

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NPA: 240 [Rate centres in NPA 240] [Dial plan for NPA 240]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-361 4 Gaithersburg MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-361 5 Gaithersburg MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-361 6 Gaithersburg MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-361 7 Gaithersburg MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2006-01-28   
240-361 8 Gaithersburg MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2006-01-28   
240-361 9 Gaithersburg MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-362 A Cumberland MD CSTWMDCRDS0  9212 VERIZON MARYLAND, INC. 240      
240-362 0 Cumberland MD   9212 VERIZON MARYLAND, INC. 240      
240-362 1 Cumberland MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240   2005-01-31   
240-362 2 Cumberland MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240   2005-01-31   
240-362 3 Cumberland MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240   2005-01-31   
240-362 4 Cumberland MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240   2005-01-31   
240-362 5 Cumberland MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240   2005-01-31   
240-362 6 Cumberland MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240   2006-07-03   
240-362 7 Cumberland MD   228C IDT AMERICA CORP - MD 240   2006-10-06   
240-362 8 Cumberland MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240   2007-03-13   
240-362 9 Cumberland MD   071F BANDWIDTH.COM CLEC, LLC - MD 240   2004-11-27   
240-363 A Washington Zone 11 MD VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-364 A Gaithersburg MD WASJDCDBDS1  4820 CAVALIER EAST LLC - MD 236      
240-364 0 Gaithersburg MD   4820 CAVALIER EAST LLC - MD 236      
240-364 1 Gaithersburg MD   4820 CAVALIER EAST LLC - MD 236      
240-364 2 Gaithersburg MD   4820 CAVALIER EAST LLC - MD 236      
240-364 3 Gaithersburg MD   4820 CAVALIER EAST LLC - MD 236      
240-364 4 Gaithersburg MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2007-10-17   
240-364 5 Gaithersburg MD   4820 CAVALIER EAST LLC - MD 236      
240-364 6 Gaithersburg MD   4820 CAVALIER EAST LLC - MD 236      
240-364 7 Gaithersburg MD   4820 CAVALIER EAST LLC - MD 236      
240-364 8 Gaithersburg MD   4820 CAVALIER EAST LLC - MD 236      
240-364 9 Gaithersburg MD   4820 CAVALIER EAST LLC - MD 236      
240-365 A Damascus MD VINNVACB2MD  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236      
240-366 A Williamsport MD MNRVMDMODS1  7421 AT&T LOCAL 240      
240-366 0 Williamsport MD   876D ONVOY, LLC - MD 240   2016-09-13   
240-366 1 Williamsport MD   071F BANDWIDTH.COM CLEC, LLC - MD 240   2010-09-04   
240-366 2 Williamsport MD   876D ONVOY, LLC - MD 240   2016-09-13   
240-366 3 Williamsport MD   2589 US LEC OF MARYLAND, INC. 240   2011-09-19   
240-366 4 Williamsport MD   7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 240   2014-07-15   
240-366 5 Williamsport MD   071F BANDWIDTH.COM CLEC, LLC - MD 240   2015-06-06   
240-366 6 Williamsport MD   071F BANDWIDTH.COM CLEC, LLC - MD 240   2016-09-19   
240-366 7 Williamsport MD   071F BANDWIDTH.COM CLEC, LLC - MD 240   2008-12-04   
240-366 8 Williamsport MD   071F BANDWIDTH.COM CLEC, LLC - MD 240   2006-08-22   
240-366 9 Williamsport MD   7421 AT&T LOCAL 240      
240-367 A Frederick MD FRDRMDFRCMD  6664 SPRINT SPECTRUM L.P. 240      
240-367 0 Frederick MD   6664 SPRINT SPECTRUM L.P. 240   2003-07-23   
240-367 1 Frederick MD   6664 SPRINT SPECTRUM L.P. 240   2005-04-22   
240-367 2 Frederick MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240   2005-10-01   
240-367 3 Frederick MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240   2007-01-11   
240-367 4 Frederick MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2006-03-24   
240-367 5 Frederick MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2006-03-24   
240-367 6 Frederick MD   6664 SPRINT SPECTRUM L.P. 240      
240-367 7 Frederick MD   6664 SPRINT SPECTRUM L.P. 240   2003-04-09   

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Last updated: Sun, 04 Apr 2021 19:28:27 UTC

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