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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OCN: 612K CSC VOICE, LLC

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
516-765 3 Nassau Zone 9 NY WHPLNYGR1MD  132   2002-06-15   
516-792 1 Nassau Zone 3 NY WHPLNYGR1MD  132   2005-04-10   
516-792 3 Nassau Zone 3 NY WHPLNYGR1MD  132   2005-04-10   
516-792 6 Nassau Zone 3 NY WHPLNYGR1MD  132   2004-09-03   
516-801 0 Nassau Zone 4 NY WHPLNYGR1MD  132      
516-801 1 Nassau Zone 4 NY WHPLNYGR1MD  132      
516-801 2 Nassau Zone 4 NY WHPLNYGR1MD  132      
516-801 3 Nassau Zone 4 NY WHPLNYGR1MD  132      
516-801 4 Nassau Zone 4 NY WHPLNYGR1MD  132      
516-802 0 Nassau Zone 7 NY WHPLNYGR1MD  132   2008-02-24   
516-802 2 Nassau Zone 7 NY WHPLNYGR1MD  132      
516-802 3 Nassau Zone 7 NY WHPLNYGR1MD  132      
516-802 5 Nassau Zone 7 NY WHPLNYGR1MD  132      
516-802 7 Nassau Zone 7 NY WHPLNYGR1MD  132      
516-804 0 Nassau Zone 9 NY WHPLNYGR1MD  132   2002-03-26   
516-804 2 Nassau Zone 9 NY WHPLNYGR1MD  132      
516-804 3 Nassau Zone 9 NY WHPLNYGR1MD  132      
516-804 5 Nassau Zone 9 NY WHPLNYGR1MD  132      
516-804 8 Nassau Zone 9 NY WHPLNYGR1MD  132      
516-804 9 Nassau Zone 9 NY WHPLNYGR1MD  132   2002-03-26   
516-809 5 Nassau Zone 9 NY WHPLNYGR1MD  132   2005-03-11   
516-809 6 Nassau Zone 9 NY WHPLNYGR1MD  132   2005-03-11   
516-809 7 Nassau Zone 9 NY WHPLNYGR1MD  132   2005-03-11   
516-809 9 Nassau Zone 9 NY WHPLNYGR1MD  132   2010-10-29   
516-833 5 Nassau Zone 5 NY WHPLNYGR1MD  132   2006-07-10   
516-833 6 Nassau Zone 5 NY WHPLNYGR1MD  132   2005-04-07   
516-833 7 Nassau Zone 5 NY WHPLNYGR1MD  132   2005-04-07   
516-837 0 Nassau Zone 3 NY WHPLNYGR1MD  132   2005-04-10   
516-837 3 Nassau Zone 3 NY WHPLNYGR1MD  132   2002-06-12   
516-837 9 Nassau Zone 3 NY WHPLNYGR1MD  132   2004-01-18   
516-864 0 Nassau Zone 7 NY WHPLNYGR1MD  132   2010-10-27   
516-871 5 Nassau Zone 8 NY WHPLNYGR1MD  132   2019-01-13   
516-881 7 Nassau Zone 3 NY WHPLNYGR1MD  132   2004-08-19   
516-900 1 Nassau Zone 9 NY WHPLNYGR1MD  132   2012-09-28   
516-918 9 Nassau Zone 1 NY WHPLNYGR1MD  132   2012-08-18   
516-927 8 Farmingdale NY WHPLNYGR1MD  132   2012-11-05   
516-934 0 Nassau Zone 8 NY WHPLNYGR1MD  132   2008-03-10   
516-992 0 Nassau Zone 6 NY WHPLNYGR1MD  132   2004-02-29   
516-992 2 Nassau Zone 6 NY WHPLNYGR1MD  132   2004-02-29   
516-992 5 Nassau Zone 6 NY WHPLNYGR1MD  132      
516-992 8 Nassau Zone 6 NY WHPLNYGR1MD  132   2001-05-07   
530-214 8 Truckee CA   726   2007-05-17   
530-278 3 Grass Valley: South DA CA   726   2007-05-17   
530-392 3 Auburn: Main DA CA   726   2007-04-16   
530-412 8 North Tahoe: Tahoe City DA CA   726   2007-05-17   
530-412 9 North Tahoe: Tahoe City DA CA   726   2014-03-03   
530-422 A Colfax: Weimar DA CA SCRMCA01XFZ  726      
530-422 3 Colfax: Weimar DA CA   726   2014-03-23   
530-427 3 Soda Springs CA   726   2009-02-11   
530-427 8 Soda Springs CA   726   2014-03-03   
530-446 A Grass Valley: Main DA CA SCRMCA01XFZ  726      
530-446 3 Grass Valley: Main DA CA   726   2014-04-07   
530-489 A Homewood CA SCRMCA01XFZ  726      
530-489 3 Homewood CA   726   2014-04-07   
530-492 A Auburn: Main DA CA SCRMCA01XFZ  726      
530-492 3 Auburn: Main DA CA   726   2014-04-07   
530-525 8 Homewood CA   726   2007-05-17   
530-536 A Truckee CA SCRMCA01XFZ  726      
530-536 3 Truckee CA   726   2014-01-03   
530-536 4 Truckee CA   726   2014-01-03   
530-536 5 Truckee CA   726   2014-01-03   
530-562 6 Truckee CA   726   2012-08-15   
530-575 4 Grass Valley: Main DA CA   726   2007-05-17   
530-637 7 Colfax: Weimar DA CA   726   2007-05-17   
530-728 A Grass Valley: South DA CA SCRMCA01XFZ  726      
530-728 3 Grass Valley: South DA CA   726   2014-04-07   
530-830 4 Auburn: North DA CA   726   2014-03-03   
539-249 9 Sallisaw OK   538   2024-04-06   
539-254 0 Spiro OK   538   2024-04-13   
539-785 1 Wister OK   538   2024-04-15   
551-224 8 Fair Lawn NJ PRNYNJFPRS1  224   2015-09-18   
551-264 9 Ramsey NJ PRNYNJFPRS1  224   2015-11-07   
551-319 2 Wyckoff NJ PRNYNJFP6MD  224   2018-12-03   
551-413 3 Kearny NJ NWRKNJMDX5X  224   2026-02-21   
551-500 9 Ramsey NJ PRNYNJFPRS1  224   2014-10-24   
572-203 A Noble OK ENIDOKMA7MD  536      
572-203 3 Noble OK   536   2021-11-28   
572-203 4 Noble OK   536   2021-11-28   
572-215 A Wayne OK ENIDOKMA7MD  536      
572-215 5 Wayne OK   536   2021-11-28   
572-356 4 Maysville OK   536   2021-10-24   
572-726 1 Anadarko OK   536   2024-04-06   
573-395 7 Taos MO   521   2024-05-12   
573-520 6 Russellville MO   521   2024-04-22   
573-903 8 Brazito MO   521   2024-05-12   
573-905 6 Jefferson City MO   521   2024-05-12   
573-978 A Centertown MO CLMBMOHRBMD  521      
573-978 5 Centertown MO   521   2024-05-12   
580-208 7 Idabel OK   536   2023-05-26   
580-297 A Enid OK ENIDOKMA7MD  536      
580-297 3 Enid OK   536   2013-12-29   
580-297 4 Enid OK   536   2013-12-29   
580-297 5 Enid OK   536   2013-12-29   
580-302 8 Weatherford OK   536   2014-03-02   
580-327 9 Alva OK   536   2014-06-13   
580-400 1 Lawton OK   536   2022-10-19   
580-412 0 Fairview OK   536   2024-03-31   
580-502 4 Wilson OK   536   2024-04-08   
580-540 4 Enid OK   536   2007-01-10   
580-540 8 Enid OK   536   2009-01-08   

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Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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