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: 750

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-750 A Danbury CT HRFRCT0344Z  866H BARR TEL USA, INC. - CT 920      
475-750 0 Danbury CT BLFDCTAP2MD  6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2023-02-05   
475-750 1 Danbury CT HRFRCT0344Z  866H BARR TEL USA, INC. - CT 920   2022-04-23   
475-750 2 Danbury CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2022-12-30   
475-750 3 Danbury CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2022-12-30   
475-750 4 Danbury CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2022-12-30   
475-750 5 Danbury CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2022-12-30   
475-750 6 Danbury CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2024-02-04   
475-750 7 Danbury CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2023-08-11   
475-750 8 Danbury CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2023-08-11   
475-750 9 Danbury CT HRFRCTBCDS1  639C ONVOY, LLC - CT 920   2023-08-11   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.