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: Sat, 20 Sep 2014 21:25:14 UTC

How to use this page

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

NXX: 584

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA Eff date Disc date Map
203-584 A New Haven CT WLFRCTAICM3 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
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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