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: Fri, 17 May 2013 01:26:12 UTC

How to use this page

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

NXX: 787

NPA-NXX-X Rate Centre Region Switch OCN LATA Eff date Disc date Map
203-787 New Haven CT NWHNCT03DS3 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920 map
203-787-0 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920 map
203-787-1 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-787-2 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-787-3 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-787-4 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-787-5 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-787-6 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-787-7 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-787-8 New Haven CT 199F BANDWIDTH.COM CLEC, LLC - CT [link] 920 2010-07-03
203-787-9 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920


Sponsored by: Execulink Telecom