Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 605 [Rate centres in NPA 605] [Dial plan for NPA 605]

NXX: 634

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-634 A Cavour SD SXFLSDPSCMD  516J TON80 COMMUNICATIONS, LLC 640      
605-634 0 Cavour SD   162G ONVOY, LLC - SD 640   2023-08-20   
605-634 1 Cavour SD   5180 LEVEL 3 COMMUNICATIONS, LLC - SD 640   2023-01-07   
605-634 2 Cavour SD   516J TON80 COMMUNICATIONS, LLC 640   2022-03-16   
605-634 3 Cavour SD   624H ONVOY SPECTRUM, LLC 640   2024-12-20   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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