Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 203 [Rate centres in NPA 203] [Dial plan for NPA 203]

NXX: 780

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
203-780 A New Haven CT HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920      
203-780 0 New Haven CT HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2013-04-29   
203-780 1 New Haven CT HRFRCTASBMD  6388 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 920   2013-12-08   
203-780 2 New Haven CT HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2012-11-23   
203-780 3 New Haven CT HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2012-11-23   
203-780 4 New Haven CT HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2012-11-23   
203-780 5 New Haven CT HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2012-11-23   
203-780 6 New Haven CT HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2012-11-23   
203-780 7 New Haven CT NWLNCTCS6MD  508J CENTURYLINK COMMUNICATIONS, LLC 920   2013-09-30   
203-780 8 New Haven CT HRFRCTCR3MD  318J COMCAST IP PHONE, LLC 920   2013-09-12   
203-780 9 New Haven CT   829J PAETEC ITEL, LLC 920   2014-08-14   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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