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

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      
410-942 3   2593 CORE COMMUNICATIONS, INC.- MD 238      
410-942 4 BLTMMDCH08Z  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 238      
410-942 5 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
410-942 6 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
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      
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 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      
443-209 6 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-209 7 BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
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      
443-502 1 CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-502 2 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-502 3   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-502 5 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-502 6 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-502 7 BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238      
443-502 8 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
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      
443-526 1 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-526 2 BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-526 3 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-526 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-526 5 BLTMMDCHX7X  073H TELNYX LLC 238      
443-526 6 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-526 7 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-526 8 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-526 9 BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238      
443-843 A HDGRMDHVDS0  9212 VERIZON MARYLAND, INC. 238      
443-843 0 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-843 1 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      
443-843 2 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      
443-843 3 BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-843 4   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-843 5 HDGRMDHVDS0  9212 VERIZON MARYLAND, INC. 238      
443-843 6 HDGRMDHVDS0  9212 VERIZON MARYLAND, INC. 238      
443-843 7 HDGRMDHVDS0  9212 VERIZON MARYLAND, INC. 238      
443-843 8 HDGRMDHVDS0  9212 VERIZON MARYLAND, INC. 238      
443-843 9   2593 CORE COMMUNICATIONS, INC.- MD 238      
667-466 A BLTQMD01BMD  516J TON80 COMMUNICATIONS, LLC 238      
667-466 1 BLTQMD019MD  490J DISH WIRELESS, LLC 238      
667-466 3 BLTQMD01BMD  516J TON80 COMMUNICATIONS, LLC 238      
667-466 9   568G PEERLESS NETWORK OF MARYLAND, LLC 238      
667-567 A BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
667-567 0 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
667-567 1 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
667-567 2 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
667-567 3 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
667-567 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
667-567 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
667-567 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
667-567 7 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
667-567 8 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
667-567 9 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.