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: 7453 U.S. TELEPACIFIC CORP. - CA

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
510-250 8 Oakland: Main-Piedmont DA CA SNRFCA15DS0  722   2007-03-25   
510-279 2 Fremont-Newark: Oliver DA CA SNJSCAYBGT0  722      
510-279 5 Fremont-Newark: Oliver DA CA SNJSCAYBGT0  722      
510-295 1 Oakland: Berkeley DA CA SNJSCAYBGT0  722      
510-295 6 Oakland: Berkeley DA CA SNJSCAYBGT0  722      
510-300 A Hayward CA SNJSCAYBDS1  722      
510-300 0 Hayward CA SNJSCAYBDS0  722      
510-300 1 Hayward CA SNJSCAYBDS0  722      
510-300 2 Hayward CA SNJSCAYBDS1  722      
510-300 3 Hayward CA SNJSCAYBDS0  722      
510-300 6 Hayward CA SNJSCAYBDS0  722      
510-300 8 Hayward CA SNJSCAYBDS1  722      
510-300 9 Hayward CA SNJSCAYBDS0  722      
510-318 5 Oakland: Main-Piedmont DA CA SNJSCAYBDS0  722   2012-10-20   
510-318 6 Oakland: Main-Piedmont DA CA SNJSCAYBDS1  722   2007-03-25   
510-318 7 Oakland: Main-Piedmont DA CA SNJSCAYBDS1  722   2007-03-25   
510-318 8 Oakland: Main-Piedmont DA CA SNJSCAYBDS0  722   2009-12-18   
510-342 7 Hayward CA SNJSCAYBDS0  722      
510-343 2 Oakland: Trinidad DA CA SNJSCAYBDS0  722      
510-345 6 Oakland: Berkeley DA CA SNJSCAYBGT0  722   2016-04-15   
510-372 8 Hayward CA SNJSCAYBGT0  722      
510-380 1 Oakland: Main-Piedmont DA CA SNJSCAYBGT0  722      
510-401 5 Fremont-Newark: Greenleaf DA CA SNJSCAYBDS0  722   2001-07-30   
510-403 7 Fremont-Newark: Oliver DA CA SNJSCAYBDS1  722   2007-12-27   
510-413 2 Fremont-Newark: Oliver DA CA SNJSCAYBDS1  722   2010-04-04   
510-433 8 Oakland: Main-Piedmont DA CA SNJSCAYBDS0  722   2011-08-28   
510-439 3 Richmond CA SNRFCA15DS0  722   2003-02-28   
510-439 4 Richmond CA SNJSCAYBDS0  722   2001-07-30   
510-441 4 Fremont-Newark: Greenleaf DA CA SNJSCAYBDS0  722   2007-03-15   
510-456 A Fremont-Newark: Main DA CA SNJSCAYBDS0  722      
510-456 1 Fremont-Newark: Main DA CA SNJSCAYBDS0  722      
510-456 2 Fremont-Newark: Main DA CA SNJSCAYBDS0  722      
510-456 3 Fremont-Newark: Main DA CA SNJSCAYBDS0  722      
510-456 4 Fremont-Newark: Main DA CA SNJSCAYBDS1  722      
510-456 7 Fremont-Newark: Main DA CA SNJSCAYBDS0  722      
510-456 9 Fremont-Newark: Main DA CA SNJSCAYBDS0  722      
510-463 6 Oakland: Main-Piedmont DA CA SNJSCAYBDS1  722      
510-485 5 Oakland: Fruitvale DA CA SNRFCA15DS0  722   2003-02-28   
510-485 7 Oakland: Fruitvale DA CA SNJSCAYBDS0  722   2001-07-30   
510-496 5 Oakland: Main-Piedmont DA CA SNJSCAYBDS0  722      
510-496 8 Oakland: Main-Piedmont DA CA SNJSCAYBDS0  722      
510-542 2 Oakland: Berkeley DA CA SNJSCAYBDS1  722   2009-11-23   
510-544 4 Oakland: Trinidad DA CA SNJSCAYBGT0  722      
510-544 5 Oakland: Trinidad DA CA SNJSCAYBGT0  722      
510-550 8 Oakland: Main-Piedmont DA CA SNRFCA15DS0  722   2006-09-29   
510-588 2 Oakland: Main-Piedmont DA CA SNJSCAYBGT0  722      
510-588 8 Oakland: Main-Piedmont DA CA SNJSCAYBDS0  722   2011-12-17   
510-601 2 Oakland: Main-Piedmont DA CA SNJSCAYBGT0  722   2015-03-21   
510-607 A Oakland: Main-Piedmont DA CA SNJSCAYBGT0  722      
510-607 2 Oakland: Main-Piedmont DA CA SNJSCAYBGT0  722   2018-05-12   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 >>

Last updated: Tue, 04 May 2021 15:04:27 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.