Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
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NPA: 530 [Rate centres in NPA 530] [Dial plan for NPA 530]

NXX: 203

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
530-203 A Elk Creek CA CHICCA01XQX  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 724      
530-203 0 Elk Creek CA   073H TELNYX LLC 724   2018-07-10   
530-203 1 Elk Creek CA   515J IP HORIZON LLC 724      
530-203 2 Elk Creek CA   515J IP HORIZON LLC 724      
530-203 3 Elk Creek CA   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 724   2013-07-13   
530-203 4 Elk Creek CA   073H TELNYX LLC 724   2019-12-04   
530-203 5 Elk Creek CA   649C ONVOY, LLC - CA 724   2017-04-28   
530-203 6 Elk Creek CA   649C ONVOY, LLC - CA 724   2019-08-01   
530-203 7 Elk Creek CA   073H TELNYX LLC 724   2021-03-22   
530-203 8 Elk Creek CA   649C ONVOY, LLC - CA 724   2019-08-01   
530-203 9 Elk Creek CA   649C ONVOY, LLC - CA 724   2021-07-18   

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

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