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: 256 [Rate centres in NPA 256] [Dial plan for NPA 256]

NXX: 203

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
256-203 A Huntsville AL HNVIALUNXJY  508J CENTURYLINK COMMUNICATIONS, LLC 477      
256-203 0 Huntsville AL HNVIALUNXIX  072F BANDWIDTH.COM CLEC, LLC - AL 477      
256-203 1 Huntsville AL HNVIALUNXIX  072F BANDWIDTH.COM CLEC, LLC - AL 477      
256-203 2 Huntsville AL HNVIALUNX7Z  318J COMCAST IP PHONE, LLC 477      
256-203 3 Huntsville AL HNVIALUNXIX  072F BANDWIDTH.COM CLEC, LLC - AL 477      
256-203 4 Huntsville AL HNVIALUNXIX  072F BANDWIDTH.COM CLEC, LLC - AL 477      
256-203 5 Huntsville AL HNVIALUNXIX  072F BANDWIDTH.COM CLEC, LLC - AL 477      
256-203 6 Huntsville AL HNVIALUNXIX  072F BANDWIDTH.COM CLEC, LLC - AL 477      
256-203 7 Huntsville AL HNVIALUNXJY  508J CENTURYLINK COMMUNICATIONS, LLC 477      
256-203 8 Huntsville AL HNVIALUNX0X  5255 LEVEL 3 COMMUNICATIONS, LLC - AL 477      
256-203 9 Huntsville AL HNVIALUNXIX  072F BANDWIDTH.COM CLEC, LLC - AL 477      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.