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: 337 [Rate centres in NPA 337] [Dial plan for NPA 337]

NXX: 346

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
337-346 A Franklin LA LFYTLA18X1X  6505 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 488      
337-346 0 Franklin LA LFYTLA18X1X  6505 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 488      
337-346 2 Franklin LA LKCHLADTSMD  153F BANDWIDTH.COM CLEC, LLC - LA 488   2012-08-24   
337-346 3 Franklin LA LKCHLADTSMD  153F BANDWIDTH.COM CLEC, LLC - LA 488   2015-09-28   
337-346 4 Franklin LA LKCHLADTSMD  153F BANDWIDTH.COM CLEC, LLC - LA 488   2018-04-30   
337-346 5 Franklin LA LKCHLADTSMD  153F BANDWIDTH.COM CLEC, LLC - LA 488   2018-04-30   
337-346 6 Franklin LA LKCHLADTSMD  153F BANDWIDTH.COM CLEC, LLC - LA 488   2018-07-08   
337-346 7 Franklin LA LFYTLAMAXUY  508J CENTURYLINK COMMUNICATIONS, LLC 488   2014-09-11   
337-346 8 Franklin LA LFYTLA18X1X  6505 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 488   2022-01-22   
337-346 9 Franklin LA LFYTLAMAX7Z  624H ONVOY SPECTRUM, LLC 488   2023-07-22   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.