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.

Last updated: Fri, 27 Feb 2015 03:29:43 UTC

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

NXX:

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 TELCO DBA FRONTIER COMM OF CT [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 TELCO DBA FRONTIER COMM OF CT [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 TELCO DBA FRONTIER COMM OF CT [link] 920      
203-654 9 New Haven CT   199F BANDWIDTH.COM CLEC, LLC - CT [link] 920 2010-04-01     

Sponsored by: VoIP Much Phone Company