Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • 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: Sun, 24 May 2015 22:14:35 UTC

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

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA Eff date Disc date Map
203-848 A New Haven CT NWHNCTGODS0  3722 CONVERSENT COMMUNICATIONS OF CONNECTICUT, LLC [link] 920     map
203-848 0 New Haven CT   4036 NEW CINGULAR WIRELESS PCS, LLC - DC [link] 920 2004-03-06     
203-848 1 New Haven CT   3722 CONVERSENT COMMUNICATIONS OF CONNECTICUT, LLC [link] 920 2002-11-08     
203-848 2 New Haven CT   3722 CONVERSENT COMMUNICATIONS OF CONNECTICUT, LLC [link] 920 2002-11-24     
203-848 3 New Haven CT   3722 CONVERSENT COMMUNICATIONS OF CONNECTICUT, LLC [link] 920 2004-08-05     
203-848 4 New Haven CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT [link] 920 2005-01-04     
203-848 5 New Haven CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT [link] 920 2005-01-04     
203-848 6 New Haven CT   3722 CONVERSENT COMMUNICATIONS OF CONNECTICUT, LLC [link] 920      
203-848 7 New Haven CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT [link] 920 2005-04-01     
203-848 8 New Haven CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT [link] 920 2004-12-02     
203-848 9 New Haven CT   6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT [link] 920 2005-05-09     

Sponsored by: VoIP Much Phone Company