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.

Brownsville, TX

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
956-826 5   4290 STPCS JOINT VENTURE, LLC 568   2026-01-26   
956-826 6   4290 STPCS JOINT VENTURE, LLC 568   2026-01-26   
956-826 7   4290 STPCS JOINT VENTURE, LLC 568   2026-01-26   
956-826 8   4290 STPCS JOINT VENTURE, LLC 568   2026-01-26   
956-826 9   4290 STPCS JOINT VENTURE, LLC 568   2026-01-26   
956-829 A   4290 STPCS JOINT VENTURE, LLC 568   2026-01-23   
956-829 0   4290 STPCS JOINT VENTURE, LLC 568   2026-01-26   
956-829 1   4290 STPCS JOINT VENTURE, LLC 568   2026-01-26   
956-829 2   4290 STPCS JOINT VENTURE, LLC 568   2026-01-26   
956-829 3   4290 STPCS JOINT VENTURE, LLC 568   2026-01-26   
956-829 4   4290 STPCS JOINT VENTURE, LLC 568   2026-01-26   
956-829 8   4290 STPCS JOINT VENTURE, LLC 568   2026-01-23   
956-829 9   4290 STPCS JOINT VENTURE, LLC 568   2026-01-23   
956-831 A BWVLTXTERS0  9533 SOUTHWESTERN BELL 568      
956-832 A BWVLTXTERS0  9533 SOUTHWESTERN BELL 568      
956-832 0 BWVLTXTERS0  9533 SOUTHWESTERN BELL 568      
956-832 1 BWVLTXTERS0  9533 SOUTHWESTERN BELL 568      
956-832 2 HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568   2005-07-30   
956-832 3 HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568   2005-07-30   
956-832 4 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568   2006-05-01   
956-832 5 HRLNTXHGBMD  319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 568   2005-05-19   
956-832 6 BWVLTXTERS0  9533 SOUTHWESTERN BELL 568      
956-832 7 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568   2006-06-08   
956-832 8 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568   2006-04-09   
956-832 9 HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568   2006-09-25   
956-838 A BWVLTXTERS0  9533 SOUTHWESTERN BELL 568      
956-838 0 BWVLTXTERS0  9533 SOUTHWESTERN BELL 568      
956-838 1 BWVLTXTERS0  9533 SOUTHWESTERN BELL 568      
956-838 2 BWVLTXTERS0  9533 SOUTHWESTERN BELL 568      
956-838 3 BWVLTXTERS0  9533 SOUTHWESTERN BELL 568      
956-838 4 BWVLTXTERS0  9533 SOUTHWESTERN BELL 568      
956-838 5 BWVLTXTERS0  9533 SOUTHWESTERN BELL 568      
956-838 6 BWVLTXTERS0  9533 SOUTHWESTERN BELL 568      
956-838 7 BWVLTXTERS0  9533 SOUTHWESTERN BELL 568      
956-838 8 BWVLTXTERS0  9533 SOUTHWESTERN BELL 568      
956-838 9 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568   2014-12-01   
956-839 A   4290 STPCS JOINT VENTURE, LLC 568   2025-11-17   
956-839 0   4290 STPCS JOINT VENTURE, LLC 568   2025-11-18   
956-839 1   4290 STPCS JOINT VENTURE, LLC 568   2025-11-18   
956-839 2   4290 STPCS JOINT VENTURE, LLC 568   2025-11-18   
956-839 3   4290 STPCS JOINT VENTURE, LLC 568   2025-11-18   
956-839 4   4290 STPCS JOINT VENTURE, LLC 568   2025-11-18   
956-839 5   4290 STPCS JOINT VENTURE, LLC 568   2025-11-17   
956-839 6   4290 STPCS JOINT VENTURE, LLC 568   2025-11-17   
956-839 7   4290 STPCS JOINT VENTURE, LLC 568   2025-11-17   
956-839 8   4290 STPCS JOINT VENTURE, LLC 568   2025-11-17   
956-839 9   4290 STPCS JOINT VENTURE, LLC 568   2025-11-17   
956-840 A HRLNTXHGXXX  318J COMCAST IP PHONE, LLC 568      
956-840 0 HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568   2023-07-11   
956-840 1 HRLNTXHGXXX  318J COMCAST IP PHONE, LLC 568   2023-07-10   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 >>

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.