Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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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   9533 SOUTHWESTERN BELL 552      
817-790 1   903C ONVOY, LLC - TX 552   2020-05-26   
817-790 2   9533 SOUTHWESTERN BELL 552      
817-790 3   9533 SOUTHWESTERN BELL 552      
817-790 4   903C ONVOY, LLC - TX 552   2020-05-26   
817-790 5   9533 SOUTHWESTERN BELL 552      
817-790 6   9533 SOUTHWESTERN BELL 552      
817-790 7   9533 SOUTHWESTERN BELL 552      
817-790 8   9533 SOUTHWESTERN BELL 552      
817-790 9   903C ONVOY, LLC - TX 552   2020-05-18   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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