Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 530 [Rate centres in NPA 530] [Dial plan for NPA 530]

NXX: 738

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
530-738 A Robbins CA RBNSCAXGRS1  4420 FRONTIER CALIFORNIA INC. 726      
530-738 0 Robbins CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 726   2023-12-15   
530-738 1 Robbins CA   981E BANDWIDTH.COM CLEC, LLC - CA 726   2011-06-23   
530-738 2 Robbins CA   649C ONVOY, LLC - CA 726   2012-12-31   
530-738 3 Robbins CA   649C ONVOY, LLC - CA 726   2013-03-14   
530-738 4 Robbins CA   4420 FRONTIER CALIFORNIA INC. 726      
530-738 5 Robbins CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 726   2005-07-10   
530-738 6 Robbins CA   649C ONVOY, LLC - CA 726   2010-07-22   
530-738 7 Robbins CA   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 726   2013-03-28   
530-738 8 Robbins CA   649C ONVOY, LLC - CA 726   2013-11-29   
530-738 9 Robbins CA   649C ONVOY, LLC - CA 726   2013-11-29   

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

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