Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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OCN: 516C AT&T CORP.

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
510-274 5 Hayward CA SNFCCA01XGX  722   2006-07-07   
510-283 5 El Sobrante-Pinole CA SNFCCA01XGX  722   2007-02-19   
510-320 5 Fremont-Newark: Main DA CA SNFCCA01XGX  722   2013-10-29   
510-327 4 Hercules-Rodeo CA SNFCCA01XGX  722   2007-02-19   
510-328 1 Oakland: Fruitvale DA CA SNFCCA01XGX  722   2013-09-03   
510-374 6 Richmond CA SNFCCA01XGX  722   2006-06-30   
510-398 8 Hayward CA SNFCCA01XGX  722   2012-11-08   
510-431 3 Fremont-Newark: Greenleaf DA CA SNFCCA01XGX  722   2006-06-30   
510-455 9 Crockett CA SNFCCA01XGX  722   2011-05-16   
510-460 9 Hayward CA SNFCCA01XGX  722   2010-06-21   
510-479 3 Oakland: Fruitvale DA CA SNFCCA01XGX  722   2006-06-30   
510-529 4 Oakland: Berkeley DA CA SNFCCA01XGX  722   2006-06-30   
510-565 1 Fremont-Newark: Main DA CA SNFCCA01XGX  722   2007-09-14   
510-567 3 Oakland: Trinidad DA CA SNFCCA01XGX  722   2010-07-06   
510-640 0 El Sobrante-Pinole CA SNFCCA01XGX  722   2015-06-18   
510-674 9 Hayward CA SNFCCA01XGX  722   2015-05-07   
510-679 5 Oakland: Berkeley DA CA SNFCCA01XGX  722   2015-07-13   
510-680 5 Richmond CA SNFCCA01XGX  722   2013-11-04   
510-686 A Oakland: Trinidad DA CA SNFCCA01XGX  722      
510-686 1 Oakland: Trinidad DA CA SNFCCA01XGX  722      
510-696 1 Oakland: Fruitvale DA CA SNFCCA01XGX  722   2016-06-14   
510-817 4 Oakland: Main-Piedmont DA CA SNFCCA01XGX  722   2006-06-30   
510-823 2 Oakland: Main-Piedmont DA CA SNFCCA01XGX  722   2014-05-16   
510-850 5 Oakland: Trinidad DA CA SNFCCA01XGX  722   2015-06-27   
510-876 A Hayward CA SNFCCA01XGX  722      
510-876 5 Hayward CA SNFCCA01XGX  722   2014-04-26   
510-878 1 Oakland: Trinidad DA CA SNFCCA01XGX  722   2014-04-11   
510-952 0 Fremont-Newark: Greenleaf DA CA SNFCCA01XGX  722   2014-10-14   
512-229 4 Elgin TX AUSTTXGR25Z  558   2007-02-15   
512-305 A Austin TX AUSTTXGR25Z  558      
512-305 3 Austin TX AUSTTXGR25Z  558      
512-337 A Leander TX AUSTTXGR25Z  558      
512-337 5 Leander TX AUSTTXGR25Z  558   2010-06-15   
512-337 7 Leander TX AUSTTXGR25Z  558   2006-06-30   
512-352 0 Taylor TX AUSTTXGR25Z  558   2011-07-01   
512-362 8 Austin TX AUSTTXGR25Z  558   2011-09-14   
512-368 5 Austin TX AUSTTXGR25Z  558   2010-05-17   
512-412 6 Bastrop TX AUSTTXGR25Z  558   2009-10-28   
512-518 3 Austin TX AUSTTXGR25Z  558   2010-09-22   
512-520 4 Austin TX AUSTTXGR25Z  558   2010-12-30   
512-520 5 Austin TX AUSTTXGR25Z  558   2010-12-30   
512-543 5 Rockdale TX AUSTTXGR25Z  558   2011-06-07   
512-551 2 Austin TX AUSTTXGR25Z  558   2009-11-13   
512-551 3 Austin TX AUSTTXGR25Z  558   2009-04-24   
512-551 8 Austin TX AUSTTXGR25Z  558   2009-07-03   
512-551 9 Austin TX AUSTTXGR25Z  558   2009-07-03   
512-564 5 Lampasas TX AUSTTXGR25Z  558   2011-11-09   
512-575 A Smithville TX AUSTTXGR25Z  558      
512-575 7 Smithville TX AUSTTXGR25Z  558   2011-10-26   
512-645 0 Austin TX AUSTTXGR25Z  558   2014-10-28   

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

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