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.
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Last updated: Sat, 25 Oct 2014 11:08:09 UTC

How to use this page

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

NXX: 407

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA Eff date Disc date Map
203-407 A New Haven CT HMDNCT00DS0 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920 map
203-407 0 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-407 1 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-407 2 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-407 3 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-407 4 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-407 5 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-407 6 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-407 7 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-407 8 New Haven CT 9147 SOUTHERN NEW ENGLAND TELEPHONE CO. [link] 920
203-407 9 New Haven CT 6624 OMNIPOINT COMMUNICATIONS, INC. - CT [link] 920 2005-11-07



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