Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 806 [Rate centres in NPA 806] [Dial plan for NPA 806]

NXX: 256

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
806-256 A Shamrock TX SHRKTXSRRS0  9533 SOUTHWESTERN BELL 546      
806-256 0 Shamrock TX   073H TELNYX LLC 546   2021-04-08   
806-256 1 Shamrock TX   9533 SOUTHWESTERN BELL 546      
806-256 2 Shamrock TX   9533 SOUTHWESTERN BELL 546      
806-256 3 Shamrock TX   9533 SOUTHWESTERN BELL 546      
806-256 4 Shamrock TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 546   2012-02-19   
806-256 5 Shamrock TX   9533 SOUTHWESTERN BELL 546      
806-256 6 Shamrock TX   903C ONVOY, LLC - TX 546   2018-10-13   
806-256 7 Shamrock TX   903C ONVOY, LLC - TX 546   2019-08-18   
806-256 8 Shamrock TX   903C ONVOY, LLC - TX 546   2019-08-18   
806-256 9 Shamrock TX   624H ONVOY SPECTRUM, LLC 546   2021-12-08   

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

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