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.

OCN: 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
510-940 A Hayward CA SNJSCAYB0MD  722      
510-940 0 Hayward CA SNJSCAYB0MD  722      
510-940 1 Hayward CA SNJSCAYB0MD  722      
510-940 2 Hayward CA SNJSCAYB0MD  722      
510-940 4 Hayward CA SNJSCAYB0MD  722      
510-940 7 Hayward CA SNJSCAYB0MD  722      
510-953 7 Fremont-Newark: Main DA CA SNJSCAYB0MD  722   2014-09-30   
510-964 5 El Sobrante-Pinole CA SNJSCAYB0MD  722   2003-09-30   
510-965 6 Richmond CA SNJSCAYB0MD  722   2001-09-03   
510-982 7 Oakland: Berkeley DA CA SNJSCAYB0MD  722   2001-09-03   
510-982 8 Oakland: Berkeley DA CA SNJSCAYB0MD  722   2001-09-03   
510-995 A Oakland: Alameda DA CA SNJSCAYB0MD  722      
510-995 1 Oakland: Alameda DA CA SNJSCAYB0MD  722      
510-995 2 Oakland: Alameda DA CA SNJSCAYB0MD  722      
510-995 3 Oakland: Alameda DA CA SNJSCAYB0MD  722      
510-995 4 Oakland: Alameda DA CA SNJSCAYB0MD  722      
510-995 5 Oakland: Alameda DA CA SNJSCAYB0MD  722      
510-995 9 Oakland: Alameda DA CA SNJSCAYB0MD  722      
512-213 3 Lockhart TX AUSTTXEE7MD  558   2010-12-23   
512-229 A Elgin TX AUSTTXEE7MD  558      
512-229 2 Elgin TX AUSTTXEE7MD  558   2007-07-13   
512-309 3 Taylor TX AUSTTXEE7MD  558   2010-12-23   
512-337 0 Leander TX AUSTTXEE7MD  558   2007-07-13   
512-381 A Austin TX AUSTTXEE7MD  558      
512-515 4 Liberty Hill EACS TX AUSTTXEE7MD  558   2010-12-23   
512-678 A Bastrop TX AUSTTXEE7MD  558      
512-678 2 Bastrop TX AUSTTXEE7MD  558      
512-678 4 Bastrop TX AUSTTXEE7MD  558      
512-678 7 Bastrop TX AUSTTXEE7MD  558      
512-702 A Austin TX AUSTTXEE7MD  558      
512-702 3 Austin TX AUSTTXEE7MD  558   2022-07-24   
512-702 4 Austin TX AUSTTXEE7MD  558   2022-07-24   
512-702 8 Austin TX AUSTTXEE7MD  558   2022-07-24   
512-735 A Austin TX AUSTTXEE7MD  558      
512-798 5 Smithville TX AUSTTXEE7MD  558   2010-12-23   
512-880 A Bastrop TX AUSTTXEE7MD  558      
512-880 5 Bastrop TX AUSTTXEE7MD  558   2022-07-24   
512-880 7 Bastrop TX AUSTTXEE7MD  558   2022-07-24   
512-953 4 Austin TX AUSTTXEE7MD  558   2015-05-04   
512-960 8 Austin TX AUSTTXEE7MD  558   2014-06-20   
530-203 A Elk Creek CA CHICCA01XQX  724      
530-203 3 Elk Creek CA CHICCA01XQX  724   2013-07-13   
530-207 5 Woodland CA SCRMCA0121Z  726   2005-04-29   
530-215 2 Redding CA CHICCA01XQX  724   2012-09-09   
530-237 8 Marysville CA SCRMCA0121Z  726      
530-239 6 Mount Shasta CA CHICCA01XQX  724   2011-05-14   
530-259 8 Chester CA CHICCA01XQX  724   2021-05-03   
530-284 2 Greenville CA CHICCA01XQX  724   2021-05-06   
530-314 5 South Tahoe CA SCRMCA0121Z  726   2011-04-22   
530-327 5 Paradise CA CHICCA01XQX  724   2010-11-28   

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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