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.

Havre de Grace, MD

1 2 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-939 A HDGRMDHVDS0  9212 VERIZON MARYLAND, INC. 238      
410-942 A HDGRMDHVDS0  9212 VERIZON MARYLAND, INC. 238      
410-942 0 HDGRMDHVDS0  9212 VERIZON MARYLAND, INC. 238      
410-942 1 HDGRMDHVDS0  9212 VERIZON MARYLAND, INC. 238      
410-942 2 BLTMMDCHAMD  1958 ATX TELECOMMUNICATIONS SERVICES, LTD. 238   2004-03-27   
410-942 3   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-03-29   
410-942 4 BLTMMDCH08Z  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 238   2004-02-14   
410-942 5 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2020-10-16   
410-942 6 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-09-09   
410-942 7 HDGRMDHVDS0  9212 VERIZON MARYLAND, INC. 238      
410-942 8 HDGRMDHVDS0  9212 VERIZON MARYLAND, INC. 238      
410-942 9 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-03-03   
443-209 A BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-209 0 BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-209 1 BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-209 2 BLTMMDCHXMX  506J TWILIO INTERNATIONAL, INC. 238   2020-12-26   
443-209 3 BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-209 4 BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-209 5 PIVLMDPKFMD  5966 LIGHTWAVE COMMUNICATIONS, LLC - MD 238   2005-10-07   
443-209 6 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2020-10-16   
443-209 7 BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2009-03-02   
443-209 8 BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-209 9 BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-502 A BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-502 0 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-502 1 CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238   2004-02-05   
443-502 2 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2005-03-10   
443-502 3   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-502 5 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2007-06-29   
443-502 6 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-28   
443-502 7 BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-25   
443-502 8 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2002-02-25   
443-502 9 BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-526 A BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-526 0 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-06-02   
443-526 1 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-02-13   
443-526 2 BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-526 3 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-24   
443-526 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-24   
443-526 5 BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-26   
443-526 6 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2015-08-18   
443-526 7 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2015-08-01   
443-526 8 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2015-08-01   
443-526 9 BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2015-06-13   
443-843 A HDGRMDHVDS0  9212 VERIZON MARYLAND, INC. 238      
443-843 0 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-07   
443-843 1 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-843 2 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-843 3 BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238   2011-12-16   
443-843 4   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   

1 2 >>

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.