Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 657 [Rate centres in NPA 657] [Dial plan for NPA 657]

NXX: 800

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-800 A Garden Grove CA LSANCARCD3S  649C ONVOY, LLC - CA 730      
657-800 0 Garden Grove CA   649C ONVOY, LLC - CA 730   2012-05-07   
657-800 1 Garden Grove CA   649C ONVOY, LLC - CA 730   2012-05-08   
657-800 2 Garden Grove CA   649C ONVOY, LLC - CA 730   2012-07-05   
657-800 3 Garden Grove CA   649C ONVOY, LLC - CA 730   2012-07-05   
657-800 4 Garden Grove CA   829J PAETEC ITEL, LLC 730   2013-03-08   
657-800 5 Garden Grove CA   649C ONVOY, LLC - CA 730   2012-07-05   
657-800 6 Garden Grove CA   649C ONVOY, LLC - CA 730   2012-07-05   
657-800 7 Garden Grove CA   649C ONVOY, LLC - CA 730   2012-07-05   
657-800 8 Garden Grove CA   649C ONVOY, LLC - CA 730   2012-05-07   
657-800 9 Garden Grove CA   649C ONVOY, LLC - CA 730   2012-07-05   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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