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.

Laredo, TX

<< 1 2 3 4 5 6 7 8 9 10 11 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
956-319 9   7421 AT&T - LOCAL 566      
956-324 A SNANTX91X7Y  4290 STPCS JOINT VENTURE, LLC 566      
956-326 A LARDTXDGRS0  9533 SOUTHWESTERN BELL 566      
956-326 0   4290 STPCS JOINT VENTURE, LLC 566   2007-07-31   
956-326 1   9533 SOUTHWESTERN BELL 566      
956-326 2   9533 SOUTHWESTERN BELL 566      
956-326 3   9533 SOUTHWESTERN BELL 566      
956-326 4   9533 SOUTHWESTERN BELL 566      
956-326 5   4290 STPCS JOINT VENTURE, LLC 566   2006-04-06   
956-326 6   4290 STPCS JOINT VENTURE, LLC 566   2006-04-06   
956-326 7   4290 STPCS JOINT VENTURE, LLC 566   2006-04-06   
956-326 8   4290 STPCS JOINT VENTURE, LLC 566   2007-07-31   
956-326 9   4290 STPCS JOINT VENTURE, LLC 566   2007-07-31   
956-333 A SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
956-333 0   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2006-10-27   
956-333 1   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2006-10-27   
956-333 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2006-10-27   
956-333 3   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2006-10-27   
956-333 4   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2006-10-27   
956-333 5   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2006-10-27   
956-333 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2006-10-27   
956-333 7   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2006-10-27   
956-333 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2006-10-27   
956-333 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2006-10-27   
956-334 A SNANTX91X7Y  4290 STPCS JOINT VENTURE, LLC 566      
956-334 0   4290 STPCS JOINT VENTURE, LLC 566      
956-334 1   4290 STPCS JOINT VENTURE, LLC 566      
956-334 2   4290 STPCS JOINT VENTURE, LLC 566      
956-334 3   4290 STPCS JOINT VENTURE, LLC 566      
956-334 4   4290 STPCS JOINT VENTURE, LLC 566      
956-334 5   4290 STPCS JOINT VENTURE, LLC 566      
956-334 6   4290 STPCS JOINT VENTURE, LLC 566      
956-334 7   4290 STPCS JOINT VENTURE, LLC 566      
956-334 8   4290 STPCS JOINT VENTURE, LLC 566      
956-334 9   4290 STPCS JOINT VENTURE, LLC 566      
956-337 A SNANTX91X7Y  4290 STPCS JOINT VENTURE, LLC 566      
956-337 0   4290 STPCS JOINT VENTURE, LLC 566      
956-337 1   4290 STPCS JOINT VENTURE, LLC 566      
956-337 2   4290 STPCS JOINT VENTURE, LLC 566      
956-337 3   4290 STPCS JOINT VENTURE, LLC 566      
956-337 4   4290 STPCS JOINT VENTURE, LLC 566      
956-337 5   4290 STPCS JOINT VENTURE, LLC 566      
956-337 6   4290 STPCS JOINT VENTURE, LLC 566      
956-337 7   4290 STPCS JOINT VENTURE, LLC 566      
956-337 8   4290 STPCS JOINT VENTURE, LLC 566      
956-337 9   4290 STPCS JOINT VENTURE, LLC 566      
956-344 A SNANTXCA50Z  6630 USA MOBILITY WIRELESS, INC. 566      
956-394 A SNANTX78G00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
956-394 0   177F PEERLESS NETWORK OF TEXAS, LLC - TX 566   2019-11-17   
956-394 1   903C ONVOY, LLC - TX 566   2019-11-28   
956-394 2   903C ONVOY, LLC - TX 566   2019-11-28   
956-394 3   732J NUSO, LLC 566   2023-12-10   
956-394 4   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 566   2023-05-08   
956-394 5   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 566   2023-05-08   
956-394 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2019-11-16   
956-394 7   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2019-11-16   
956-394 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2019-11-16   
956-394 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2019-11-16   
956-401 A SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
956-401 0   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2007-05-15   
956-401 1   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2007-05-15   
956-401 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2007-05-15   
956-401 3   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2007-05-15   
956-401 4   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2007-05-15   
956-401 5   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2007-05-15   
956-401 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2007-05-15   
956-401 7   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2007-05-15   
956-401 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2007-05-15   
956-401 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2007-05-15   
956-413 A SNANTX91X7Y  5562 METROPCS, INC. 566      
956-413 0   5562 METROPCS, INC. 566   2013-07-20   
956-413 1   5562 METROPCS, INC. 566   2013-07-20   
956-413 2   5562 METROPCS, INC. 566   2013-07-20   
956-413 3   5562 METROPCS, INC. 566   2013-07-20   
956-413 4   5562 METROPCS, INC. 566   2013-07-20   
956-413 5   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 566   2014-05-03   
956-413 6   004F BANDWIDTH.COM CLEC, LLC - TX 566   2014-05-16   
956-413 7   004F BANDWIDTH.COM CLEC, LLC - TX 566   2014-05-16   
956-413 8   004F BANDWIDTH.COM CLEC, LLC - TX 566   2014-05-16   
956-413 9   5562 METROPCS, INC. 566   2013-07-20   
956-415 A SNANTXCA34Z  004F BANDWIDTH.COM CLEC, LLC - TX 566      
956-415 0   004F BANDWIDTH.COM CLEC, LLC - TX 566   2013-07-19   
956-415 1   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2013-09-12   
956-415 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2013-09-12   
956-415 3   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2014-06-27   
956-415 4   4290 STPCS JOINT VENTURE, LLC 566   2013-09-15   
956-415 5   4290 STPCS JOINT VENTURE, LLC 566   2013-09-15   
956-415 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2020-04-21   
956-415 7   4290 STPCS JOINT VENTURE, LLC 566   2013-09-15   
956-415 8   4290 STPCS JOINT VENTURE, LLC 566   2013-09-15   
956-415 9   7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 566   2013-09-09   
956-436 A SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
956-436 0   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2010-01-16   
956-436 1   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2013-01-31   
956-436 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2013-01-31   
956-436 3   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2013-04-29   
956-436 4   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2013-05-20   
956-436 5   903C ONVOY, LLC - TX 566   2013-11-12   
956-436 6   5562 METROPCS, INC. 566   2009-12-22   
956-436 7   5562 METROPCS, INC. 566   2014-07-08   

<< 1 2 3 4 5 6 7 8 9 10 11 >>

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.