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: 366

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
319-366 A Cedar Rapids IA CDRRIADTDS0  9631 QWEST CORPORATION 635      
319-366 0 Cedar Rapids IA   9631 QWEST CORPORATION 635      
319-366 1 Cedar Rapids IA   9631 QWEST CORPORATION 635      
319-366 2 Cedar Rapids IA   9631 QWEST CORPORATION 635      
319-366 3 Cedar Rapids IA   9631 QWEST CORPORATION 635      
319-366 4 Cedar Rapids IA   9631 QWEST CORPORATION 635      
319-366 5 Cedar Rapids IA   9631 QWEST CORPORATION 635      
319-366 6 Cedar Rapids IA   9631 QWEST CORPORATION 635      
319-366 7 Cedar Rapids IA   9631 QWEST CORPORATION 635      
319-366 8 Cedar Rapids IA   9631 QWEST CORPORATION 635      
319-366 9 Cedar Rapids IA   508J CENTURYLINK COMMUNICATIONS, LLC 635      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.