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: 529

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
319-529 A Waterloo IA CDRRIADTX9X  6570 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 635      
319-529 0 Waterloo IA CDRRIADTX9X  6570 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 635   2010-10-31   
319-529 1 Waterloo IA CDRRIADTX9X  6570 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 635   2010-12-18   
319-529 2 Waterloo IA   6529 T-MOBILE USA, INC. 635   2010-12-16   
319-529 3 Waterloo IA CDRRIADTX9X  6570 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 635   2011-01-21   
319-529 4 Waterloo IA CDRRIADTFMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 635   2011-04-15   
319-529 5 Waterloo IA CDRRIAAX7MD  6529 T-MOBILE USA, INC. 635   2012-03-08   
319-529 6 Waterloo IA   6529 T-MOBILE USA, INC. 635   2011-04-06   
319-529 7 Waterloo IA CDRRIADTX9X  6570 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 635   2011-04-28   
319-529 8 Waterloo IA   6529 T-MOBILE USA, INC. 635   2011-06-13   
319-529 9 Waterloo IA CDRRIADTNMD  985E BANDWIDTH.COM CLEC, LLC - IA 635   2011-06-22   

Last updated: Fri, 10 Jul 2026 02:55:48 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.