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: 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: 508

NPA-NXX-X Rate Centre Region Switch OCN LATA Eff date Disc date Map
203-508 New Haven CT NWHNCT030MD 3863 CTC COMMUNICATIONS CORP. - CT [link] 920 2004-04-04 map
203-508-0 New Haven CT 6624 OMNIPOINT COMMUNICATIONS, INC. - CT [link] 920 2004-06-13 map
203-508-1 New Haven CT 3863 CTC COMMUNICATIONS CORP. - CT [link] 920 2004-04-04
203-508-2 New Haven CT 6624 OMNIPOINT COMMUNICATIONS, INC. - CT [link] 920 2004-07-16
203-508-3 New Haven CT 6624 OMNIPOINT COMMUNICATIONS, INC. - CT [link] 920 2004-07-16
203-508-4 New Haven CT 6624 OMNIPOINT COMMUNICATIONS, INC. - CT [link] 920 2005-05-29
203-508-5 New Haven CT 6624 OMNIPOINT COMMUNICATIONS, INC. - CT [link] 920 2005-01-01
203-508-6 New Haven CT 3083 PAETEC COMMUNICATIONS, INC. - CT [link] 920 2004-07-22
203-508-7 New Haven CT 3083 PAETEC COMMUNICATIONS, INC. - CT [link] 920 2004-07-22
203-508-8 New Haven CT 3083 PAETEC COMMUNICATIONS, INC. - CT [link] 920 2004-07-22
203-508-9 New Haven CT 3083 PAETEC COMMUNICATIONS, INC. - CT [link] 920 2004-07-22


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