Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 956 [Rate centres in NPA 956] [Dial plan for NPA 956]

NXX: 319

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-319 A Laredo TX LARDTXAC1MD  7421 AT&T - LOCAL 566      
956-319 0 Laredo TX   4290 STPCS JOINT VENTURE, LLC 566   2005-02-06   
956-319 1 Laredo TX   4290 STPCS JOINT VENTURE, LLC 566   2007-07-13   
956-319 2 Laredo TX   4290 STPCS JOINT VENTURE, LLC 566   2007-07-13   
956-319 3 Laredo TX   4290 STPCS JOINT VENTURE, LLC 566   2007-07-13   
956-319 4 Laredo TX   4290 STPCS JOINT VENTURE, LLC 566   2005-04-02   
956-319 5 Laredo TX   4290 STPCS JOINT VENTURE, LLC 566   2005-07-17   
956-319 6 Laredo TX   4290 STPCS JOINT VENTURE, LLC 566   2005-08-22   
956-319 7 Laredo TX   4290 STPCS JOINT VENTURE, LLC 566   2005-12-16   
956-319 8 Laredo TX   4290 STPCS JOINT VENTURE, LLC 566   2005-06-12   
956-319 9 Laredo TX   7421 AT&T - LOCAL 566      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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