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.

Switch: HRLNTXHGDS0

Remotes:

Switch Switch name Switch type
BWVLTXTERS0  Terminal  DRL 
LSFRTXLFRS0  Los Fresnos  DRL 
PTISTXPIRS0  Port Isabel  DRL 
PTISTXSPRS0  South Padre  DRL 
RHNDTXRHRS0  Rio Hondo  DRL 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
956-228 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-291 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-291 1 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-291 5 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-291 9 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-364 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-364 0 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-364 1 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-364 2 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-364 3 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-364 4 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-364 5 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-364 6 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-364 7 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-364 8 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-365 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-365 0 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-365 1 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-365 3 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-365 4 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-365 5 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-365 6 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-365 7 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-365 8 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-366 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-366 1 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-366 2 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-366 3 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-366 4 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-366 5 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-366 6 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-366 7 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-366 8 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-389 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-389 1 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-389 2 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-389 3 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-389 4 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-389 5 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-389 6 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-389 7 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-389 8 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-392 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-392 5 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-392 6 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-392 7 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-412 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-421 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-423 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-425 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-427 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-428 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-430 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-440 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-440 0 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-440 1 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-440 2 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-440 3 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-440 4 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-440 6 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-440 7 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-440 8 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-440 9 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-444 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-444 0 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-444 1 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-444 3 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-444 5 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-444 7 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-577 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-577 0 Harlingen TX 9533 SOUTHWESTERN BELL 568   2016-03-18   
956-610 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-730 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-730 5 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-752 A Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-752 0 Harlingen TX 9533 SOUTHWESTERN BELL 568      
956-760 A Harlingen TX 9533 SOUTHWESTERN BELL 568      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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