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: 300

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
475-300 A New Haven CT HRFRCT03CMD  197D VONAGE AMERICA LLC 920      
475-300 0 New Haven CT   197D VONAGE AMERICA LLC 920   2016-08-01   
475-300 1 New Haven CT   5562 METROPCS, INC. 920   2018-07-24   
475-300 2 New Haven CT   318J COMCAST IP PHONE, LLC 920   2018-06-29   
475-300 3 New Haven CT   5562 METROPCS, INC. 920   2017-09-22   
475-300 4 New Haven CT   5562 METROPCS, INC. 920   2018-04-09   
475-300 5 New Haven CT   5562 METROPCS, INC. 920   2017-11-02   
475-300 6 New Haven CT   5562 METROPCS, INC. 920   2018-04-10   
475-300 7 New Haven CT   5562 METROPCS, INC. 920   2018-04-10   
475-300 8 New Haven CT   6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2016-12-10   
475-300 9 New Haven CT   5562 METROPCS, INC. 920   2018-07-24   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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