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: 667 [Rate centres in NPA 667] [Dial plan for NPA 667]

NXX: 308

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-308 A Towson MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      
667-308 0 Towson MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2021-07-20   
667-308 1 Towson MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2013-08-15   
667-308 2 Towson MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2013-07-24   
667-308 3 Towson MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-01   
667-308 4 Towson MD BLTMMDCHFMD  5562 METROPCS, INC. 238   2013-08-15   
667-308 5 Towson MD BLTMMDCHFMD  5562 METROPCS, INC. 238   2013-09-06   
667-308 6 Towson MD BLTMMDCHFMD  5562 METROPCS, INC. 238   2013-09-06   
667-308 7 Towson MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS LLC 238   2013-10-01   
667-308 8 Towson MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-01-11   
667-308 9 Towson MD BLTQMD010MD  082H LOCAL ACCESS LLC - MD 238   2013-09-06   

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.