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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Switch: YBCYCATU0MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
279-228 A Sacramento: Main DA CA 973E RACE TELECOMMUNICATIONS, INC. - CA 726      
279-228 1 Sacramento: Main DA CA 973E RACE TELECOMMUNICATIONS, INC. - CA 726   2022-12-03   
530-476 8 Arbuckle CA 973E RACE TELECOMMUNICATIONS, INC. - CA 726   2022-10-29   
530-619 1 Colusa CA 973E RACE TELECOMMUNICATIONS, INC. - CA 726   2022-10-24   
530-817 A Nevada City CA 973E RACE TELECOMMUNICATIONS, INC. - CA 726      
530-817 1 Nevada City CA 973E RACE TELECOMMUNICATIONS, INC. - CA 726   2022-10-29   
530-874 A Williams CA 973E RACE TELECOMMUNICATIONS, INC. - CA 726      
530-874 1 Williams CA 973E RACE TELECOMMUNICATIONS, INC. - CA 726   2022-12-03   
530-920 A Grass Valley: Main DA CA 973E RACE TELECOMMUNICATIONS, INC. - CA 726      
530-920 1 Grass Valley: Main DA CA 973E RACE TELECOMMUNICATIONS, INC. - CA 726   2022-12-03   
530-930 A Marysville CA 973E RACE TELECOMMUNICATIONS, INC. - CA 726      
530-930 1 Marysville CA 973E RACE TELECOMMUNICATIONS, INC. - CA 726   2022-11-14   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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