Local Calling Guide

Area code/prefix search

Search by area code/prefix (NPA/NXX) or OCN

  • 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.

Last updated: Sat, 30 Aug 2014 11:47:04 UTC

How to use this page

NPA: 203 [Rate centres in NPA 203] [Dial plan for NPA 203]

NXX: 654

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA Eff date Disc date Map
203-654 A New Haven CT NHVNCT00RS0 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920 map
203-654 0 New Haven CT 4036 NEW CINGULAR WIRELESS PCS, LLC - DC [link] 920 2006-03-07
203-654 1 New Haven CT 4036 NEW CINGULAR WIRELESS PCS, LLC - DC [link] 920 2003-04-05
203-654 2 New Haven CT 3863 CTC COMMUNICATIONS CORP. - CT [link] 920 2007-12-04
203-654 3 New Haven CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT [link] 920 2014-01-03
203-654 4 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-654 5 New Haven CT 6664 SPRINT SPECTRUM L.P. [link] 920 2005-07-07
203-654 6 New Haven CT 4036 NEW CINGULAR WIRELESS PCS, LLC - DC [link] 920 2004-03-17
203-654 7 New Haven CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT [link] 920 2004-09-03
203-654 8 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-654 9 New Haven CT 199F BANDWIDTH.COM CLEC, LLC - CT [link] 920 2010-04-01



Sponsored by: Callcentric - VoIP Internet phone service