Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 475 [Rate centres in NPA 475] [Dial plan for NPA 475]

NXX: 522

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-522 A Madison CT HRFRCT0379Z  199F BANDWIDTH.COM CLEC, LLC - CT 920      
475-522 0 Madison CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2015-06-21   
475-522 1 Madison CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2015-06-21   
475-522 2 Madison CT   639C ONVOY, LLC - CT 920   2019-08-09   
475-522 3 Madison CT   639C ONVOY, LLC - CT 920   2020-07-05   
475-522 4 Madison CT   639C ONVOY, LLC - CT 920   2021-03-04   
475-522 5 Madison CT   639C ONVOY, LLC - CT 920   2021-03-04   
475-522 6 Madison CT   318J COMCAST IP PHONE, LLC 920   2019-09-22   
475-522 7 Madison CT   624H ONVOY SPECTRUM, LLC 920   2021-03-12   
475-522 8 Madison CT   073H TELNYX LLC 920   2018-05-02   
475-522 9 Madison CT   639C ONVOY, LLC - CT 920   2015-06-29   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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