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: 319 [Rate centres in NPA 319] [Dial plan for NPA 319]

NXX: 237

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
319-237 A Burlington IA BURLIABD2MD  2842 LOCAL TELEPHONE DATA SERVICES CORP. 634      
319-237 0 Burlington IA BURLIABD2MD  2842 LOCAL TELEPHONE DATA SERVICES CORP. 634      
319-237 1 Burlington IA BURLIABD2MD  2842 LOCAL TELEPHONE DATA SERVICES CORP. 634      
319-237 2 Burlington IA DVNPIA80XPX  6529 T-MOBILE USA, INC. 634   2011-11-28   
319-237 3 Burlington IA DVNPIAEADMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 634   2008-01-25   
319-237 4 Burlington IA DVNPIADTX5X  985E BANDWIDTH.COM CLEC, LLC - IA 634   2014-11-30   
319-237 5 Burlington IA MNPLIAXCJMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 634   2015-03-11   
319-237 6 Burlington IA MNPLIAXCJMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 634   2015-09-18   
319-237 7 Burlington IA DVNPIADTGMD  221F ONVOY, LLC - IA 634   2013-04-04   
319-237 8 Burlington IA BURLIABD2MD  2842 LOCAL TELEPHONE DATA SERVICES CORP. 634      
319-237 9 Burlington IA DVNPIADTXNX  073H TELNYX LLC 634   2020-05-25   

Last updated: Tue, 07 Oct 2025 16:47:53 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.