Local Calling Guide

Area code/prefix search

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NPA: 817 [Rate centres in NPA 817] [Dial plan for NPA 817]

NXX: 402

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
817-402 A Alvarado TX FTWOTXEDX1Z  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
817-402 0 Alvarado TX   903C ONVOY, LLC - TX 552   2016-10-30   
817-402 1 Alvarado TX   903C ONVOY, LLC - TX 552   2016-10-30   
817-402 2 Alvarado TX   903C ONVOY, LLC - TX 552   2010-06-15   
817-402 3 Alvarado TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2011-03-13   
817-402 4 Alvarado TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2016-04-23   
817-402 5 Alvarado TX   516C AT&T CORP. 552   2010-11-29   
817-402 6 Alvarado TX   7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552   2010-03-12   
817-402 7 Alvarado TX   903C ONVOY, LLC - TX 552   2013-12-09   
817-402 8 Alvarado TX   903C ONVOY, LLC - TX 552   2013-12-09   
817-402 9 Alvarado TX   073H TELNYX LLC 552   2017-06-12   

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

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