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: 323

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-323 A Newtown CT BLFDCTAP2MD  6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920      
475-323 0 Newtown CT BLFDCTAP2MD  6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2016-11-27   
475-323 1 Newtown CT HRFRCT03HMD  073H TELNYX LLC 920   2018-05-02   
475-323 2 Newtown CT WLMNCT132MD  792K CHARTER IP ENABLED SERVICES, LLC 920   2016-03-14   
475-323 3 Newtown CT BLFDCTAP2MD  6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2018-09-21   
475-323 4 Newtown CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2019-08-09   
475-323 5 Newtown CT   145J TERRA NOVA TELECOM INC. 920   2022-10-07   
475-323 6 Newtown CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2019-08-09   
475-323 7 Newtown CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2017-10-21   
475-323 8 Newtown CT MDTWCTNIBMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2016-02-08   
475-323 9 Newtown CT BLFDCTAP2MD  6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2015-09-27   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.