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.
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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
210-437 0 San Antonio TX   566   2004-11-18   
210-437 1 San Antonio TX   566   2004-08-30   
210-437 2 San Antonio TX   566   2004-08-30   
210-437 3 San Antonio TX   566   2004-08-30   
210-437 4 San Antonio TX   566   2004-08-30   
210-442 8 San Antonio TX   566   2006-04-12   
210-444 9 San Antonio TX   566   2006-04-07   
210-447 7 San Antonio TX   566   2005-03-07   
210-451 0 San Antonio TX   566   2007-09-10   
210-451 5 San Antonio TX   566   2007-09-10   
210-451 7 San Antonio TX   566   2007-09-10   
210-451 8 San Antonio TX   566   2007-09-10   
210-451 9 San Antonio TX   566   2007-09-10   
210-455 A San Antonio TX   566      
210-455 0 San Antonio TX   566   2005-04-09   
210-455 2 San Antonio TX   566   2005-04-09   
210-455 3 San Antonio TX   566   2005-04-09   
210-455 4 San Antonio TX   566   2005-04-09   
210-455 5 San Antonio TX   566   2005-04-09   
210-455 6 San Antonio TX   566   2005-04-09   
210-455 7 San Antonio TX   566   2005-04-09   
210-455 8 San Antonio TX   566   2005-04-09   
210-455 9 San Antonio TX   566   2005-04-09   
210-462 1 San Antonio TX   566   2006-03-24   
210-462 7 San Antonio TX   566   2006-04-21   
210-462 9 San Antonio TX   566   2005-03-07   
210-463 9 San Antonio TX   566   2005-03-07   
210-465 7 San Antonio TX   566   2006-04-21   
210-465 9 San Antonio TX   566   2006-04-21   
210-467 5 San Antonio TX   566   2005-03-07   
210-467 9 San Antonio TX   566   2005-03-07   
210-474 0 San Antonio TX   566   2007-09-10   
210-476 5 San Antonio TX   566   2006-09-25   
210-481 4 San Antonio TX   566   2006-04-21   
210-481 8 San Antonio TX   566   2006-04-21   
210-507 2 San Antonio TX   566   2006-05-10   
210-507 7 San Antonio TX   566   2006-03-24   
210-530 1 San Antonio TX   566   2007-04-02   
210-530 4 San Antonio TX   566   2007-09-10   
210-530 8 San Antonio TX   566   2007-04-02   
210-538 5 San Antonio TX   566   2004-08-30   
210-538 8 San Antonio TX   566   2004-11-18   
210-541 4 San Antonio TX   566   2007-04-16   
210-541 5 San Antonio TX   566   2006-09-25   
210-549 A San Antonio TX   566      
210-549 0 San Antonio TX   566   2010-12-20   
210-549 1 San Antonio TX   566   2010-12-20   
210-549 2 San Antonio TX   566   2010-12-20   
210-549 3 San Antonio TX   566   2010-12-20   
210-549 4 San Antonio TX   566   2010-11-06   
210-549 5 San Antonio TX   566   2011-02-11   
210-562 3 San Antonio TX   566   2007-09-10   
210-564 9 San Antonio TX   566   2007-09-24   
210-580 1 San Antonio TX   566   2017-09-28   
210-580 2 San Antonio TX   566   2017-09-28   
210-580 9 San Antonio TX   566   2018-07-30   
210-592 1 San Antonio TX   566   2007-06-25   
210-592 6 San Antonio TX   566   2007-06-25   
210-592 7 San Antonio TX   566   2007-06-25   
210-592 8 San Antonio TX   566   2007-06-25   
210-592 9 San Antonio TX   566   2007-07-09   
210-595 1 San Antonio TX   566   2004-11-18   
210-595 3 San Antonio TX   566   2004-11-18   
210-595 6 San Antonio TX   566   2004-11-18   
210-595 7 San Antonio TX   566   2004-11-18   
210-595 8 San Antonio TX   566   2004-11-18   
210-598 A San Antonio TX   566      
210-598 0 San Antonio TX   566   2011-05-05   
210-598 1 San Antonio TX   566   2011-05-05   
210-598 2 San Antonio TX   566   2011-05-15   
210-598 3 San Antonio TX   566   2011-05-29   
210-598 4 San Antonio TX   566   2011-05-29   
210-600 3 San Antonio TX   566   2015-10-15   
210-600 4 San Antonio TX   566   2015-10-15   
210-616 2 San Antonio TX   566   2006-06-30   
210-616 4 San Antonio TX   566   2007-09-10   
210-617 7 San Antonio TX   566   2007-09-24   
210-626 8 San Antonio TX   566   2005-10-20   
210-627 6 San Antonio TX   566   2006-09-25   
210-634 A San Antonio TX   566      
210-634 6 San Antonio TX   566   2016-05-20   
210-634 7 San Antonio TX   566   2016-05-20   
210-634 9 San Antonio TX   566   2016-05-20   
210-635 0 San Antonio TX   566   2007-09-24   
210-637 9 San Antonio TX   566   2007-09-24   
210-642 4 San Antonio TX   566   2016-09-20   
210-642 5 San Antonio TX   566   2016-09-20   
210-647 6 San Antonio TX   566   2006-08-03   
210-667 4 San Antonio TX   566   2007-09-24   
210-670 7 San Antonio TX   566   2006-10-20   
210-686 9 San Antonio TX   566   2018-07-30   
210-688 4 San Antonio TX   566   2007-09-24   
210-688 5 San Antonio TX   566   2007-09-24   
210-721 7 San Antonio TX   566   2014-09-16   
210-750 9 San Antonio TX   566   2019-09-30   
210-761 0 San Antonio TX   566   2018-12-14   
210-761 1 San Antonio TX   566   2018-12-14   
210-761 9 San Antonio TX   566   2019-09-30   
210-781 4 San Antonio TX   566   2007-03-13   
210-845 A San Antonio TX   566      

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Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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