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: 612K CSC VOICE, LLC

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
325-701 4 Abilene TX   550   2006-07-31   
325-701 7 Abilene TX   550   2010-09-18   
325-701 8 Abilene TX   550   2014-07-30   
325-701 9 Abilene TX   550   2013-04-14   
325-703 A San Angelo TX SANGTXXAXDX  961      
325-703 1 San Angelo TX   961   2013-12-29   
325-703 2 San Angelo TX   961   2013-12-29   
325-703 3 San Angelo TX   961   2013-12-29   
325-703 4 San Angelo TX   961   2013-12-29   
325-703 5 San Angelo TX   961   2013-12-29   
325-703 6 San Angelo TX   961   2013-12-29   
325-704 A Abilene TX ABLNTXORXKX  550      
325-704 1 Abilene TX   550   2014-01-16   
325-704 2 Abilene TX   550   2014-01-16   
325-704 3 Abilene TX   550   2014-01-16   
325-704 4 Abilene TX   550   2014-01-16   
325-704 5 Abilene TX   550   2014-01-16   
325-704 6 Abilene TX   550   2014-01-16   
325-747 A San Angelo TX SANGTXXAXDX  961      
325-910 8 Brady TX   961   2024-04-07   
325-933 4 Sweetwater TX   550   2006-07-31   
325-933 5 Sweetwater TX   550   2005-02-18   
325-933 6 Sweetwater TX   550   2014-03-20   
325-936 7 Roscoe TX   550   2022-12-13   
329-241 A Poughkeepsie NY PGHKNYSHX4Z  133   2026-01-01   
329-241 4 Poughkeepsie NY PGHKNYSHX4Z  133   2026-01-01   
330-709 A Mantua OH AKRNOH2557Z  325      
330-709 1 Mantua OH   325   2024-05-12   
330-902 9 Ravenna OH   325   2024-04-07   
332-298 A New York City Zone 01 NY NYCMNYBXX1X  132   2025-09-26   
332-298 4 New York City Zone 01 NY NYCMNYBXX1X  132   2025-09-26   
346-548 8 Baytown TX   560   2022-05-20   
346-734 4 Beach City TX   560   2024-03-04   
346-910 6 Mont Belvieu TX   560   2022-05-20   
347-202 4 New York City Zone 05 NY WHPLNYGR1MD  132   2006-03-14   
347-202 5 New York City Zone 05 NY WHPLNYGR1MD  132   2006-03-14   
347-202 7 New York City Zone 05 NY WHPLNYGR1MD  132   2006-03-30   
347-202 8 New York City Zone 05 NY WHPLNYGR1MD  132   2006-03-30   
347-202 9 New York City Zone 05 NY WHPLNYGR1MD  132   2006-03-30   
347-221 0 New York City Zone 06 NY WHPLNYGR1MD  132   2007-01-22   
347-221 1 New York City Zone 06 NY WHPLNYGR1MD  132   2007-01-22   
347-240 A New York City Zone 06 NY WHPLNYGR1MD  132      
347-240 0 New York City Zone 06 NY WHPLNYGR1MD  132   2007-02-10   
347-240 1 New York City Zone 06 NY WHPLNYGR1MD  132   2007-02-10   
347-240 2 New York City Zone 06 NY WHPLNYGR1MD  132   2007-02-10   
347-240 3 New York City Zone 06 NY WHPLNYGR1MD  132   2007-02-10   
347-240 4 New York City Zone 06 NY WHPLNYGR1MD  132   2007-02-10   
347-240 5 New York City Zone 06 NY WHPLNYGR1MD  132   2007-02-10   
347-240 6 New York City Zone 06 NY WHPLNYGR1MD  132   2007-02-10   
347-240 7 New York City Zone 06 NY WHPLNYGR1MD  132   2007-02-10   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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