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: 406 [Rate centres in NPA 406] [Dial plan for NPA 406]

NXX: 413

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-413 A Billings MT BLNGMTMADS1  9636 QWEST CORPORATION 650      
406-413 0 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2018-04-09   
406-413 1 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2018-04-09   
406-413 2 Billings MT BLNGMTMADS1  9636 QWEST CORPORATION 650   2015-06-11   
406-413 3 Billings MT BLNGMTMADS1  9636 QWEST CORPORATION 650   2015-06-11   
406-413 4 Billings MT BLNGMTMADS1  9636 QWEST CORPORATION 650   2015-06-11   
406-413 5 Billings MT BLNGMTMAMMD  6010 NEW CINGULAR WIRELESS PCS, LLC 650   2016-11-18   
406-413 6 Billings MT BLNGMTWEBMD  771G TELEPORT COMMUNICATIONS AMERICA MT - LLC 650   2017-08-21   
406-413 7 Billings MT BLNGMTMALMD  994E BANDWIDTH.COM CLEC, LLC - MT 650   2022-08-13   
406-413 8 Billings MT BLNGMTWEIMD  6564 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 650   2018-04-09   
406-413 9 Billings MT BLNGMT93DS0  588H AIRUS, INC. - MT 650   2017-04-06   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.