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: 290

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-290 A Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
956-290 0 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2011-03-04   
956-290 1 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2011-03-04   
956-290 2 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2011-03-07   
956-290 3 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2011-03-07   
956-290 4 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2011-03-07   
956-290 5 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2011-03-07   
956-290 6 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2011-03-07   
956-290 7 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2011-03-07   
956-290 8 Laredo TX SNANTXDIRMD  903C ONVOY, LLC - TX 566   2011-11-22   
956-290 9 Laredo TX SNANTXCA34Z  004F BANDWIDTH.COM CLEC, LLC - TX 566   2012-08-18   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.