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.

NPA: 475 [Rate centres in NPA 475] [Dial plan for NPA 475]

NXX: 253

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-253 A Wallingford CT HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920      
475-253 0 Wallingford CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920   2019-04-29   
475-253 1 Wallingford CT HRFRCT03HMD  073H TELNYX LLC 920   2019-05-13   
475-253 2 Wallingford CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2019-03-18   
475-253 3 Wallingford CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2019-03-18   
475-253 4 Wallingford CT HRFRCTASDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 920   2019-06-13   
475-253 5 Wallingford CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2020-06-21   
475-253 6 Wallingford CT HRFRCTCR3MD  318J COMCAST IP PHONE, LLC 920   2019-05-20   
475-253 7 Wallingford CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2020-02-28   
475-253 8 Wallingford CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2020-02-28   
475-253 9 Wallingford CT HRFRCT0380Z  539F PEERLESS NETWORK OF CONNECTICUT, LLC - CT 920   2018-12-15   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.