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.

OCN: 793K TWC IP ENABLED SERVICES, LLC

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
956-513 1 Edinburg TX HRLNTXHGXYX  568   2014-11-27   
956-513 8 Edinburg TX HRLNTXHGXYX  568   2016-03-04   
956-516 4 Laredo TX   566   2016-08-27   
956-516 5 Laredo TX   566   2016-08-27   
956-516 7 Laredo TX   566   2014-10-24   
956-518 7 Brownsville TX HRLNTXHGXYX  568   2014-01-16   
956-520 7 Weslaco TX HRLNTXHGXYX  568   2014-12-28   
956-520 8 Weslaco TX HRLNTXHGXYX  568   2014-11-27   
956-524 8 Port Isabel TX HRLNTXHGXYX  568   2011-01-14   
956-525 7 Brownsville TX HRLNTXHGXYX  568   2014-11-24   
956-540 7 McAllen TX HRLNTXHGXYX  568   2017-08-31   
956-545 A Brownsville TX HRLNTXHGXYX  568   2025-02-11   
956-545 0 Brownsville TX HRLNTXHGXYX  568   2011-04-23   
956-558 1 McAllen TX HRLNTXHGXYX  568   2020-10-15   
956-561 4 Brownsville TX HRLNTXHGXYX  568   2014-11-13   
956-567 2 Edcouch TX HRLNTXHGXYX  568   2011-01-14   
956-568 A Laredo TX   566      
956-591 A Mission TX HRLNTXHGXYX  568   2025-02-11   
956-591 0 Mission TX HRLNTXHGXYX  568   2020-11-06   
956-598 5 Mission TX HRLNTXHGXYX  568   2014-01-18   
956-598 6 Mission TX HRLNTXHGXYX  568   2015-01-15   
956-598 7 Mission TX HRLNTXHGXYX  568   2014-07-10   
956-598 8 Mission TX HRLNTXHGXYX  568   2014-11-14   
956-599 9 Mission TX HRLNTXHGXYX  568   2012-07-03   
956-600 7 Mission TX HRLNTXHGXYX  568   2011-01-14   
956-600 8 Mission TX HRLNTXHGXYX  568   2016-03-04   
956-601 A Pharr TX HRLNTXHGXYX  568   2025-02-11   
956-601 0 Pharr TX HRLNTXHGXYX  568   2015-01-17   
956-601 1 Pharr TX HRLNTXHGXYX  568   2015-02-20   
956-601 2 Pharr TX HRLNTXHGXYX  568   2015-04-13   
956-602 A Laredo TX   566      
956-602 0 Laredo TX   566   2014-12-19   
956-602 1 Laredo TX   566   2014-12-19   
956-602 8 Laredo TX   566   2015-01-15   
956-603 2 Edinburg TX HRLNTXHGXYX  568   2016-07-28   
956-608 2 Laredo TX   566   2015-02-20   
956-608 3 Laredo TX   566   2015-03-12   
956-608 4 Laredo TX   566   2015-04-15   
956-609 8 Edinburg TX HRLNTXHGXYX  568   2015-08-27   
956-609 9 Edinburg TX HRLNTXHGXYX  568   2015-03-15   
956-615 A Laredo TX   566      
956-615 0 Laredo TX   566   2015-09-04   
956-615 1 Laredo TX   566   2015-09-04   
956-620 3 Brownsville TX HRLNTXHGXYX  568   2015-11-19   
956-621 A Brownsville TX HRLNTXHGXYX  568   2025-02-11   
956-621 0 Brownsville TX HRLNTXHGXYX  568      
956-621 1 Brownsville TX HRLNTXHGXYX  568      
956-621 2 Brownsville TX HRLNTXHGXYX  568      
956-621 3 Brownsville TX HRLNTXHGXYX  568      
956-621 4 Brownsville TX HRLNTXHGXYX  568      

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Last updated: Sat, 04 Jul 2026 13:07:56 UTC

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