Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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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
510-373 5 Oakland: Alameda DA CA   722   2001-09-03   
510-380 1 Oakland: Main-Piedmont DA CA   722      
510-401 A Fremont-Newark: Greenleaf DA CA SNJSCAYB0MD  722      
510-401 2 Fremont-Newark: Greenleaf DA CA   722      
510-401 5 Fremont-Newark: Greenleaf DA CA   722   2001-07-30   
510-401 6 Fremont-Newark: Greenleaf DA CA   722      
510-401 8 Fremont-Newark: Greenleaf DA CA   722      
510-403 A Fremont-Newark: Oliver DA CA SNJSCAYB0MD  722      
510-403 2 Fremont-Newark: Oliver DA CA   722      
510-403 3 Fremont-Newark: Oliver DA CA   722      
510-403 7 Fremont-Newark: Oliver DA CA   722   2007-12-27   
510-413 2 Fremont-Newark: Oliver DA CA   722   2010-04-04   
510-431 5 Fremont-Newark: Greenleaf DA CA   722   2001-09-03   
510-433 8 Oakland: Main-Piedmont DA CA   722   2011-08-28   
510-439 3 Richmond CA   722   2003-02-28   
510-439 4 Richmond CA   722   2001-07-30   
510-441 4 Fremont-Newark: Greenleaf DA CA   722   2007-03-15   
510-456 A Fremont-Newark: Main DA CA SNJSCAYB0MD  722      
510-456 1 Fremont-Newark: Main DA CA   722      
510-456 2 Fremont-Newark: Main DA CA   722      
510-456 3 Fremont-Newark: Main DA CA   722      
510-456 4 Fremont-Newark: Main DA CA   722      
510-456 7 Fremont-Newark: Main DA CA   722      
510-456 9 Fremont-Newark: Main DA CA   722      
510-463 A Oakland: Main-Piedmont DA CA SNJSCAYB0MD  722      
510-463 2 Oakland: Main-Piedmont DA CA   722      
510-463 5 Oakland: Main-Piedmont DA CA   722      
510-463 6 Oakland: Main-Piedmont DA CA   722      
510-485 5 Oakland: Fruitvale DA CA   722   2003-02-28   
510-485 7 Oakland: Fruitvale DA CA   722   2001-07-30   
510-496 A Oakland: Main-Piedmont DA CA SNJSCAYB0MD  722      
510-496 2 Oakland: Main-Piedmont DA CA   722      
510-496 5 Oakland: Main-Piedmont DA CA   722      
510-496 7 Oakland: Main-Piedmont DA CA   722      
510-496 8 Oakland: Main-Piedmont DA CA   722      
510-542 2 Oakland: Berkeley DA CA   722   2009-11-23   
510-544 4 Oakland: Trinidad DA CA   722      
510-544 5 Oakland: Trinidad DA CA   722      
510-550 8 Oakland: Main-Piedmont DA CA   722   2006-09-29   
510-585 A Fremont-Newark: Main DA CA SNJSCAYB0MD  722      
510-585 2 Fremont-Newark: Main DA CA   722      
510-588 2 Oakland: Main-Piedmont DA CA   722      
510-588 8 Oakland: Main-Piedmont DA CA   722   2011-12-17   
510-601 2 Oakland: Main-Piedmont DA CA   722   2015-03-21   
510-607 A Oakland: Main-Piedmont DA CA SNJSCAYB0MD  722      
510-607 3 Oakland: Main-Piedmont DA CA   722   2018-05-12   
510-607 4 Oakland: Main-Piedmont DA CA   722   2018-05-12   
510-662 3 El Sobrante-Pinole CA   722   2001-07-30   
510-662 5 El Sobrante-Pinole CA   722   2003-02-28   
510-674 2 Hayward CA   722   2015-11-19   

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

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