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.

Alvarado EMS, TX

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
817-790 A ALVDTXTIRS0  9533 SOUTHWESTERN BELL 552      
817-790 0 ALVDTXTIRS0  9533 SOUTHWESTERN BELL 552      
817-790 1 DLLSTXALDS4  903C ONVOY, LLC - TX 552      
817-790 2 ALVDTXTIRS0  9533 SOUTHWESTERN BELL 552      
817-790 3 ALVDTXTIRS0  9533 SOUTHWESTERN BELL 552      
817-790 4 DLLSTXALDS4  903C ONVOY, LLC - TX 552      
817-790 5 ALVDTXTIRS0  9533 SOUTHWESTERN BELL 552      
817-790 6 ALVDTXTIRS0  9533 SOUTHWESTERN BELL 552      
817-790 7 ALVDTXTIRS0  9533 SOUTHWESTERN BELL 552      
817-790 8 ALVDTXTIRS0  9533 SOUTHWESTERN BELL 552      
817-790 9 DLLSTXALDS4  903C ONVOY, LLC - TX 552      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.