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.

Switch: SNFCCA01XGX

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
707-900 5 Lakeport CA 516C AT&T CORP. 722   2011-05-26   
707-901 5 Boonville CA 516C AT&T CORP. 722   2011-09-26   
831-217 5 Boulder Creek CA 516C AT&T CORP. 722   2011-09-26   
831-226 A Santa Cruz CA 516C AT&T CORP. 722      
831-226 5 Santa Cruz CA 516C AT&T CORP. 722   2015-08-15   
831-508 5 Felton CA 516C AT&T CORP. 722   2011-09-26   
831-515 7 Santa Cruz CA 516C AT&T CORP. 722   2006-07-07   
831-532 5 Ben Lomond CA 516C AT&T CORP. 722   2011-09-26   
831-536 5 Watsonville CA 516C AT&T CORP. 722   2007-02-26   
831-708 4 Aptos CA 516C AT&T CORP. 722   2008-08-22   
831-726 5 Watsonville CA 516C AT&T CORP. 722   2015-06-23   
925-230 8 Dublin-San Ramon CA 516C AT&T CORP. 722   2006-06-30   
925-257 7 Orinda CA 516C AT&T CORP. 722   2006-07-08   
925-267 0 Pittsburg CA 516C AT&T CORP. 722   2016-07-16   
925-267 2 Pittsburg CA 516C AT&T CORP. 722   2006-06-30   
925-304 2 Clayton CA 516C AT&T CORP. 722   2006-06-30   
925-384 A Antioch CA 516C AT&T CORP. 722      
925-384 5 Antioch CA 516C AT&T CORP. 722   2015-01-04   
925-385 7 Lafayette CA 516C AT&T CORP. 722   2008-08-29   
925-387 5 Martinez CA 516C AT&T CORP. 722   2007-02-19   
925-390 7 East Contra Costa CA 516C AT&T CORP. 722   2016-11-25   
925-392 8 East Contra Costa CA 516C AT&T CORP. 722   2006-06-30   
925-415 3 Bishop Ranch CA 516C AT&T CORP. 722   2006-07-07   
925-425 7 Pleasanton CA 516C AT&T CORP. 722   2006-07-07   
925-446 4 Concord CA 516C AT&T CORP. 722   2013-08-06   
925-448 8 Walnut Creek CA 516C AT&T CORP. 722   2014-06-13   
925-476 5 Walnut Creek CA 516C AT&T CORP. 722   2006-06-30   
925-560 8 Dublin-San Ramon CA 516C AT&T CORP. 722   2010-05-05   
925-568 5 Sunol CA 516C AT&T CORP. 722   2012-01-30   
925-583 5 Livermore CA 516C AT&T CORP. 722   2007-02-19   
925-626 5 East Contra Costa CA 516C AT&T CORP. 722   2014-02-19   
925-643 5 Pittsburg West CA 516C AT&T CORP. 722   2007-02-19   
925-667 9 Livermore CA 516C AT&T CORP. 722   2015-05-16   
925-679 7 East Contra Costa CA 516C AT&T CORP. 722   2010-04-30   
925-718 5 Danville CA 516C AT&T CORP. 722   2005-05-09   
925-732 3 Antioch CA 516C AT&T CORP. 722   2012-02-27   
925-791 5 Danville CA 516C AT&T CORP. 722   2013-02-04   
925-794 6 Moraga CA 516C AT&T CORP. 722   2005-09-14   
925-822 3 Concord CA 516C AT&T CORP. 722   2006-07-07   
925-978 4 Antioch CA 516C AT&T CORP. 722   2006-07-07   

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Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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