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.

Jarrettsville, MD

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-692 A JRVLMDJERS0  9212 VERIZON MARYLAND, INC. 238      
410-692 0 JRVLMDJERS0  9212 VERIZON MARYLAND, INC. 238      
410-692 1 BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2015-06-18   
410-692 2 JRVLMDJERS0  9212 VERIZON MARYLAND, INC. 238      
410-692 3   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-03-29   
410-692 4 BLTMMDCH47Z  420C ARMSTRONG TELECOMMUNICATIONS, INC. - MD 238   2008-09-08   
410-692 5 JRVLMDJERS0  9212 VERIZON MARYLAND, INC. 238      
410-692 6 JRVLMDJERS0  9212 VERIZON MARYLAND, INC. 238      
410-692 7 JRVLMDJERS0  9212 VERIZON MARYLAND, INC. 238      
410-692 8 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-09-04   
410-692 9 JRVLMDJERS0  9212 VERIZON MARYLAND, INC. 238      
443-499 A BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-499 2 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-03-12   
443-499 3 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-03-31   
443-499 4 BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-499 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2023-10-22   
443-499 6 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-22   
443-499 7 BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-12   
443-499 8 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-22   
443-499 9 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-07   
443-533 A BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-533 0 BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-26   
443-533 1 CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238   2003-03-02   
443-533 2 BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238   2010-05-18   
443-533 3 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2018-10-08   
443-533 4 BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-02-15   
443-533 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-04   
443-533 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-04   
443-533 7   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-22   
443-533 8   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-22   
443-533 9 BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-644 A BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-644 1 BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-644 2   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-22   
443-644 3   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-644 4   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-644 6   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-22   
443-644 7   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-22   
443-719 A HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-719 0 HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-719 1 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-03-04   
443-719 4   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-30   
443-719 5   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
443-719 6   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
443-719 7   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
443-719 8 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-719 9 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
667-576 A BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
667-576 1 BLTQMD019MD  490J DISH WIRELESS, LLC 238   2022-09-08   
667-576 2 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-07-11   
667-576 3 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-07-11   
667-576 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2023-11-24   
667-576 5 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-05-23   
667-576 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-05-22   
667-576 7 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-02-03   
667-576 8 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-02-03   
667-576 9 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-01-03   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.