Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

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

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-304 8 Washington Zone 5 MD   6664 SPRINT SPECTRUM L.P. 236   2002-10-17   
240-304 9 Washington Zone 5 MD   6664 SPRINT SPECTRUM L.P. 236   2004-02-16   
240-305 A Washington Zone 3 MD WASHDCSWXCZ  6664 SPRINT SPECTRUM L.P. 236      
240-306 A Gaithersburg MD WASHDCRKDS3  8992 ALLEGIANCE TELECOM, INC. - MD 236      
240-306 0 Gaithersburg MD   8992 ALLEGIANCE TELECOM, INC. - MD 236      
240-306 1 Gaithersburg MD   8992 ALLEGIANCE TELECOM, INC. - MD 236      
240-306 2 Gaithersburg MD   8992 ALLEGIANCE TELECOM, INC. - MD 236      
240-306 3 Gaithersburg MD   8992 ALLEGIANCE TELECOM, INC. - MD 236      
240-306 4 Gaithersburg MD   8992 ALLEGIANCE TELECOM, INC. - MD 236      
240-306 5 Gaithersburg MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2017-09-19   
240-306 6 Gaithersburg MD   5562 METRO PCS, INC. 236   2018-07-24   
240-306 7 Gaithersburg MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2019-10-22   
240-306 8 Gaithersburg MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2019-10-22   
240-306 9 Gaithersburg MD   8992 ALLEGIANCE TELECOM, INC. - MD 236      
240-307 A Emmitsburg MD MNRVMDMOX2X  7421 AT&T LOCAL 240      
240-307 0 Emmitsburg MD   071F BANDWIDTH.COM CLEC, LLC - MD 240   2017-10-19   
240-307 1 Emmitsburg MD   071F BANDWIDTH.COM CLEC, LLC - MD 240   2012-07-15   
240-307 2 Emmitsburg MD   071F BANDWIDTH.COM CLEC, LLC - MD 240   2015-08-10   
240-307 3 Emmitsburg MD   7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 240   2008-07-01   
240-307 4 Emmitsburg MD   876D ONVOY, LLC - MD 240   2016-09-12   
240-307 5 Emmitsburg MD   876D ONVOY, LLC - MD 240   2016-09-12   
240-307 6 Emmitsburg MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 240   2014-04-20   
240-307 7 Emmitsburg MD   7575 CENTURYLINK COMMUNICATIONS LLC 240   2016-10-26   
240-307 8 Emmitsburg MD   073H TELNYX LLC 240   2017-08-08   
240-307 9 Emmitsburg MD   7421 AT&T LOCAL 240   2003-06-02   
240-308 A Damascus MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-308 0 Damascus MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-308 1 Damascus MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-308 2 Damascus MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-308 3 Damascus MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2013-07-12   
240-308 4 Damascus MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2014-05-11   
240-308 5 Damascus MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2016-03-11   
240-308 6 Damascus MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-12-05   
240-308 7 Damascus MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2007-05-15   
240-308 8 Damascus MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-05-20   
240-308 9 Damascus MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-309 A Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-309 0 Leonardtown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2014-07-17   
240-309 1 Leonardtown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2014-08-15   
240-309 2 Leonardtown MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2012-12-04   
240-309 3 Leonardtown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2014-05-01   
240-309 4 Leonardtown MD   228C IDT AMERICA CORP - MD 236   2013-02-10   
240-309 5 Leonardtown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2013-12-28   
240-309 6 Leonardtown MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2012-12-04   
240-309 7 Leonardtown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2014-09-15   
240-309 8 Leonardtown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2015-05-05   
240-309 9 Leonardtown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2015-06-30   
240-310 A Hagerstown MD FRDRMDFRNMD  4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
240-310 0 Hagerstown MD   4720 USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 240      
240-310 1 Hagerstown MD   2589 US LEC OF MARYLAND, INC. 240   2008-02-11   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 >>

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.