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: 771

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-771 A Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
956-771 0 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2008-01-28   
956-771 1 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2008-01-28   
956-771 2 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2008-01-28   
956-771 3 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2008-02-19   
956-771 4 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2008-02-19   
956-771 5 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2008-02-19   
956-771 6 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2008-02-19   
956-771 7 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2008-02-19   
956-771 8 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2008-08-02   
956-771 9 Laredo TX SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2008-08-02   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.