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
252-833 A Washington NC RCMTNCXAX6Z  951      
252-833 0 Washington NC   951   2010-12-22   
252-833 4 Washington NC   951   2007-03-02   
252-999 5 Greenville NC   951   2019-07-04   
254-264 4 Eastland TX   552   2024-03-04   
254-438 A Florence TX WACOTX01XQY  556      
254-438 6 Florence TX   556   2021-07-16   
254-438 7 Florence TX   556   2021-07-16   
254-469 A Cisco TX DLLSTXRIXYY  552      
254-469 1 Cisco TX   552   2024-04-08   
254-549 1 Breckenridge TX   552   2021-12-10   
254-549 3 Breckenridge TX   552   2021-12-10   
254-903 3 Ranger TX   552   2024-03-07   
281-399 7 Splendora EMS TX   560   2009-07-28   
281-462 6 Crosby TX   560   2009-12-16   
281-503 2 Porter Heights TX   560   2014-02-28   
281-577 3 Porter TX   560   2014-02-28   
281-577 4 Porter TX   560   2014-02-28   
281-601 6 Porter TX   560   2007-05-11   
281-601 8 Porter TX   560   2014-04-11   
281-608 7 Humble TX   560   2014-06-30   
281-706 9 Humble TX   560   2014-06-30   
281-713 1 Humble TX   560   2014-06-30   
281-713 2 Humble TX   560   2007-12-20   
281-713 8 Humble TX   560   2008-08-15   
281-747 2 Porter TX   560   2009-07-28   
281-913 6 Humble TX   560   2009-07-28   
281-973 1 Humble TX   560   2007-03-07   
304-200 2 Williamstown WV   254   2014-02-17   
304-205 4 Charleston Zone 1 WV   254   2007-01-26   
304-205 5 Charleston Zone 1 WV   254   2007-12-04   
304-205 7 Charleston Zone 1 WV   254   2007-12-04   
304-220 2 Charleston Zone 4 WV   254   2014-02-14   
304-223 A Flat Top WV CHTNWVLE7MD  254      
304-223 2 Flat Top WV   254   2014-02-15   
304-236 3 Williamson WV   254   2014-02-17   
304-236 5 Williamson WV   254   2007-01-26   
304-272 2 Wayne WV   254   2014-02-17   
304-275 7 Elizabeth WV   254   2007-01-26   
304-299 5 St Marys WV   254   2007-01-26   
304-301 A Athens WV BLFDWVXAXHX  932      
304-301 2 Athens WV   932   2014-02-17   
304-301 4 Athens WV   932   2008-09-13   
304-305 6 Belmont WV   254   2014-02-13   
304-306 A Charleston Zone 7 WV CHTNWVLE7MD  254      
304-306 4 Charleston Zone 7 WV   254   2007-01-26   
304-306 5 Charleston Zone 7 WV   254   2014-02-14   
304-306 6 Charleston Zone 7 WV   254   2014-02-14   
304-307 2 Madison WV   254   2014-02-16   
304-307 4 Madison WV   254   2007-01-26   

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

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