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: 956 [Rate centres in NPA 956] [Dial plan for NPA 956]

NXX: 937

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-937 A Laredo TX SNANTXCA88Z  516J TON80 COMMUNICATIONS, LLC 566      
956-937 0 Laredo TX SNANTXCA34Z  004F BANDWIDTH.COM CLEC, LLC - TX 566   2021-08-23   
956-937 1 Laredo TX SNANTXCA34Z  004F BANDWIDTH.COM CLEC, LLC - TX 566   2021-08-23   
956-937 2 Laredo TX SNANTXCA34Z  004F BANDWIDTH.COM CLEC, LLC - TX 566   2021-08-23   
956-937 3 Laredo TX SNANTXCA34Z  004F BANDWIDTH.COM CLEC, LLC - TX 566   2021-08-23   
956-937 4 Laredo TX SNANTXCA88Z  516J TON80 COMMUNICATIONS, LLC 566   2021-06-03   
956-937 5 Laredo TX SNANTXCA34Z  004F BANDWIDTH.COM CLEC, LLC - TX 566   2021-09-24   
956-937 6 Laredo TX SNANTXCA34Z  004F BANDWIDTH.COM CLEC, LLC - TX 566   2021-09-24   
956-937 7 Laredo TX SNANTXCA34Z  004F BANDWIDTH.COM CLEC, LLC - TX 566   2021-09-24   
956-937 8 Laredo TX SNANTXCA34Z  004F BANDWIDTH.COM CLEC, LLC - TX 566   2021-09-24   
956-937 9 Laredo TX SNANTXCA34Z  004F BANDWIDTH.COM CLEC, LLC - TX 566   2021-09-24   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.