Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: RBNSCAXGRS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-738 A Robbins CA 4420 FRONTIER CALIFORNIA INC. 726      
530-738 4 Robbins CA 4420 FRONTIER CALIFORNIA INC. 726      

Last updated: Sat, 15 Nov 2025 03:38:44 UTC

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