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: 584

NPA-NXX-X Rate Centre Region Switch OCN LATA Eff date Disc date Map
203-584 New Haven CT 6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT [link] 920 map
203-584-0 New Haven CT 6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT [link] 920 2010-09-06 map
203-584-1 New Haven CT 6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT [link] 920 2010-09-09
203-584-2 New Haven CT 6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT [link] 920 2010-10-02
203-584-3 New Haven CT 6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT [link] 920 2010-11-08
203-584-4 New Haven CT 4036 NEW CINGULAR WIRELESS PCS, LLC - DC [link] 920 2010-10-26
203-584-5 New Haven CT 4036 NEW CINGULAR WIRELESS PCS, LLC - DC [link] 920 2010-10-26
203-584-6 New Haven CT 4036 NEW CINGULAR WIRELESS PCS, LLC - DC [link] 920 2010-10-26
203-584-7 New Haven CT 199F BANDWIDTH.COM CLEC, LLC - CT [link] 920 2010-12-04
203-584-8 New Haven CT 6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT [link] 920 2010-12-04
203-584-9 New Haven CT 4800 LEVEL 3 COMMUNICATIONS, LLC - CT [link] 920 2010-12-09


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