Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 817 [Rate centres in NPA 817] [Dial plan for NPA 817]

NXX: 580

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
817-580 A Atlas TX FTWOTXATRP0  9533 SOUTHWESTERN BELL 552      
817-580 0 Atlas TX   9533 SOUTHWESTERN BELL 552      
817-580 1 Atlas TX   7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2006-04-06   
817-580 3 Atlas TX   903C ONVOY, LLC - TX 552   2023-08-12   
817-580 4 Atlas TX   903C ONVOY, LLC - TX 552   2023-08-12   
817-580 5 Atlas TX   903C ONVOY, LLC - TX 552   2023-08-12   
817-580 6 Atlas TX   7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552   2019-10-11   
817-580 7 Atlas TX   903C ONVOY, LLC - TX 552   2012-05-18   
817-580 8 Atlas TX   903C ONVOY, LLC - TX 552   2023-08-12   
817-580 9 Atlas TX   903C ONVOY, LLC - TX 552   2023-08-12   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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