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: 722

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
319-722 A Williamsburg IA WLBGIAXOPS0  1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 635      
319-722 1 Williamsburg IA CDRRIAAX7MD  6529 T-MOBILE USA, INC. 635   2018-04-09   
319-722 2 Williamsburg IA CDRRIAAX7MD  6529 T-MOBILE USA, INC. 635   2018-04-09   
319-722 4 Williamsburg IA IWCYIA7000Z  490J DISH WIRELESS, LLC 635   2023-12-18   
319-722 7 Williamsburg IA CDRRIAAX7MD  5562 METROPCS, INC. 635   2018-07-13   
319-722 8 Williamsburg IA CDRRIADTDMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 635   2018-03-01   
319-722 9 Williamsburg IA WLBGIAXOPS0  1167 WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 635   2015-08-25   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.