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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-567 5 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236   2006-08-26   
240-567 6 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236   2006-08-26   
240-567 7 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236   2006-08-26   
240-567 8 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236   2006-08-26   
240-567 9 Washington Zone 10 MD RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236   2006-08-26   
240-568 A Laurel MD LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
240-569 A Flintstone MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
240-569 0 Flintstone MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2017-11-24   
240-569 1 Flintstone MD HGTWMD530MD  073H TELNYX LLC 240   2018-05-01   
240-569 2 Flintstone MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-06-16   
240-569 3 Flintstone MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-06-16   
240-569 4 Flintstone MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-06-16   
240-569 5 Flintstone MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2020-01-06   
240-569 6 Flintstone MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2019-07-31   
240-569 7 Flintstone MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2017-11-26   
240-569 8 Flintstone MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2020-01-06   
240-569 9 Flintstone MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2019-07-31   
240-570 A Ashton (Baltimore LATA) MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
240-570 0 Ashton (Baltimore LATA) MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
240-570 1 Ashton (Baltimore LATA) MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
240-570 2 Ashton (Baltimore LATA) MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
240-570 3 Ashton (Baltimore LATA) MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
240-570 4 Ashton (Baltimore LATA) MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
240-570 5 Ashton (Baltimore LATA) MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
240-570 6 Ashton (Baltimore LATA) MD BLTMMDCHXVX  321J HD CARRIER LLC 238   2016-05-14   
240-570 7 Ashton (Baltimore LATA) MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-22   
240-570 8 Ashton (Baltimore LATA) MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-22   
240-570 9 Ashton (Baltimore LATA) MD   321J HD CARRIER LLC 238   2016-05-14   
240-571 A Laurel (Baltimore LATA) MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
240-571 0 Laurel (Baltimore LATA) MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2021-03-18   
240-571 1 Laurel (Baltimore LATA) MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2022-01-01   
240-571 2 Laurel (Baltimore LATA) MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-07-11   
240-571 3 Laurel (Baltimore LATA) MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-07-11   
240-571 4 Laurel (Baltimore LATA) MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2021-07-29   
240-571 5 Laurel (Baltimore LATA) MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-05-22   
240-571 6 Laurel (Baltimore LATA) MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2022-01-01   
240-571 7 Laurel (Baltimore LATA) MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2021-07-29   
240-571 8 Laurel (Baltimore LATA) MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2022-06-02   
240-571 9 Laurel (Baltimore LATA) MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2022-06-02   
240-572 A Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-572 0 Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2017-12-30   
240-572 1 Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2018-01-21   
240-572 2 Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2018-08-03   
240-572 3 Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2021-01-19   
240-572 4 Leonardtown MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2018-08-11   
240-572 5 Leonardtown MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2019-01-05   
240-572 6 Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2022-09-02   
240-572 7 Leonardtown MD WASHDC12MMD  516J TON80 COMMUNICATIONS, LLC 236   2021-10-15   
240-572 8 Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2018-01-06   
240-572 9 Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2018-01-06   
240-573 A Washington Zone 15 MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-573 0 Washington Zone 15 MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2025-08-11   
240-573 1 Washington Zone 15 MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2025-10-22   
240-573 2 Washington Zone 15 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2012-04-05   
240-573 6 Washington Zone 15 MD BTVLMD12CMA  5562 METROPCS, INC. 236   2014-12-29   
240-573 7 Washington Zone 15 MD MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2012-06-09   
240-573 8 Washington Zone 15 MD BTVLMD12CMA  5562 METROPCS, INC. 236   2014-12-29   
240-573 9 Washington Zone 15 MD   515J IP HORIZON LLC 236   2016-05-31   
240-574 A Friendsville MD MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240      
240-574 0 Friendsville MD CMLDMDCMUMD  073H TELNYX LLC 240   2021-03-04   
240-574 1 Friendsville MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2022-11-06   
240-574 2 Friendsville MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2023-02-24   
240-574 3 Friendsville MD FRDRMDFRXPX  624H ONVOY SPECTRUM, LLC 240   2021-05-24   
240-574 4 Friendsville MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2021-04-02   
240-574 5 Friendsville MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2021-04-02   
240-574 6 Friendsville MD FRDRMDFRXPX  624H ONVOY SPECTRUM, LLC 240   2021-11-15   
240-574 7 Friendsville MD HGTWMD53EMD  516J TON80 COMMUNICATIONS, LLC 240   2021-11-17   
240-574 8 Friendsville MD FRDRMDFRXPX  624H ONVOY SPECTRUM, LLC 240   2021-11-15   
240-574 9 Friendsville MD MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2020-10-11   
240-575 A Frederick MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240      
240-575 0 Frederick MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240   2007-06-16   
240-575 1 Frederick MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2007-07-03   
240-575 2 Frederick MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2007-07-27   
240-575 3 Frederick MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2007-07-27   
240-575 4 Frederick MD FRDRMDFRXSX  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240   2008-04-04   
240-575 5 Frederick MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2006-02-20   
240-575 6 Frederick MD FRDRMDFRXMD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2006-02-20   
240-575 7 Frederick MD   829J PAETEC ITEL, LLC 240   2008-04-20   
240-575 8 Frederick MD MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2007-08-20   
240-575 9 Frederick MD FRDRMDFRXTX  318J COMCAST IP PHONE, LLC 240   2008-03-19   
240-576 A Hagerstown MD HGTWMD534MD  197D VONAGE AMERICA LLC 240      
240-576 0 Hagerstown MD HGTWMD534MD  197D VONAGE AMERICA LLC 240   2018-02-10   
240-576 1 Hagerstown MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
240-576 2 Hagerstown MD FRDRMDFRXPX  624H ONVOY SPECTRUM, LLC 240   2024-12-05   
240-576 3 Hagerstown MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2019-04-12   
240-576 4 Hagerstown MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2019-04-12   
240-576 5 Hagerstown MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2019-04-12   
240-576 6 Hagerstown MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2019-04-12   
240-576 7 Hagerstown MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
240-576 8 Hagerstown MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
240-576 9 Hagerstown MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-10-22   
240-577 A Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-577 0 Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-10-06   
240-577 1 Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-10-09   
240-577 2 Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2006-12-02   
240-577 3 Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2007-03-05   
240-577 4 Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2007-05-03   
240-577 5 Leonardtown MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2007-06-01   
240-577 6 Leonardtown MD WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2007-07-30   
240-577 7 Leonardtown MD   829J PAETEC ITEL, LLC 236   2006-11-22   

<< 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 >>

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.