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
860-417 3 Watertown CT   920   2003-06-30   
860-417 6 Watertown CT   920   2006-08-10   
860-484 4 Thomaston CT   920   2003-07-01   
860-618 0 Torrington CT   920   2005-04-21   
860-618 2 Torrington CT   920   2004-10-28   
860-618 3 Torrington CT   920   2003-06-25   
860-618 5 Torrington CT   920   2004-10-06   
860-618 7 Torrington CT   920   2012-11-12   
860-619 8 Washington CT   920   2003-12-23   
860-880 8 Thomaston CT   920   2011-10-30   
862-464 A Newark NJ   224   2025-09-26   
862-464 4 Newark NJ   224   2025-09-26   
959-209 A Watertown CT   920      
959-209 4 Watertown CT   920   2016-08-28   

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Last updated: Mon, 15 Sep 2025 02:24:40 UTC

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