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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 350 [Rate centres in NPA 350] [Dial plan for NPA 350]

<< 1 2 3 4 5 6 7

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
350-955 0 Waterford: Don Pedro DA CA SKTNCA01XKZ  624H ONVOY SPECTRUM, LLC 738   2024-01-19   
350-955 1 Waterford: Don Pedro DA CA SKTNCA01XIZ  073H TELNYX LLC 738   2024-01-20   
350-955 9 Waterford: Don Pedro DA CA   145J TERRA NOVA TELECOM INC. 738   2025-10-09   
350-960 A Waterford: Main DA CA SKTNCA01XKZ  624H ONVOY SPECTRUM, LLC 738   2024-01-19   
350-960 0 Waterford: Main DA CA SKTNCA01XKZ  624H ONVOY SPECTRUM, LLC 738   2024-01-19   
350-960 1 Waterford: Main DA CA SKTNCA01XFY  649C ONVOY, LLC - CA 738   2024-06-07   
350-960 7 Waterford: Main DA CA SKTNCAGSGT0  6010 NEW CINGULAR WIRELESS PCS, LLC 738   2024-09-09   
350-960 8 Waterford: Main DA CA SKTNCA01XFY  649C ONVOY, LLC - CA 738   2024-07-27   
350-960 9 Waterford: Main DA CA SKTNCACZDS2  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 738   2024-02-20   
350-999 A Gustine CA SKTNCACZ7MD  145J TERRA NOVA TELECOM INC. 738      
350-999 0 Gustine CA SKTNCACZ4MD  939H COMMIO, LLC 738   2022-12-05   
350-999 1 Gustine CA SKTNCA01XKZ  624H ONVOY SPECTRUM, LLC 738   2023-12-11   
350-999 2 Gustine CA SKTNCAGSGT0  6010 NEW CINGULAR WIRELESS PCS, LLC 738   2025-01-12   
350-999 3 Gustine CA SKTNCAGSGT0  6010 NEW CINGULAR WIRELESS PCS, LLC 738   2025-01-12   
350-999 7 Gustine CA SKTNCA01XPZ  318J COMCAST IP PHONE, LLC 738   2022-12-05   
350-999 8 Gustine CA SKTNCACZDS2  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 738   2022-12-05   
350-999 9 Gustine CA   145J TERRA NOVA TELECOM INC. 738   2022-12-04   

<< 1 2 3 4 5 6 7

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.