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: 401 [Rate centres in NPA 401] [Dial plan for NPA 401]

NXX: 558

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
401-558 A Greenwich RI PRVDRIWAXZY  4957 CHOICE ONE COMMUNICATIONS OF RHODE ISLAND, INC. 130      
401-558 0 Greenwich RI PRVDRIWAXZY  4957 CHOICE ONE COMMUNICATIONS OF RHODE ISLAND, INC. 130      
401-558 1 Greenwich RI PRVDRIWAXZY  4957 CHOICE ONE COMMUNICATIONS OF RHODE ISLAND, INC. 130      
401-558 2 Greenwich RI PRVDRIWAXZY  4957 CHOICE ONE COMMUNICATIONS OF RHODE ISLAND, INC. 130      
401-558 3 Greenwich RI PRVDRIWAXZY  4957 CHOICE ONE COMMUNICATIONS OF RHODE ISLAND, INC. 130      
401-558 4 Greenwich RI PRVDRIWAXZY  4957 CHOICE ONE COMMUNICATIONS OF RHODE ISLAND, INC. 130      
401-558 5 Greenwich RI EPRVRINB6MD  145J TERRA NOVA TELECOM INC. 130   2020-11-14   
401-558 9 Greenwich RI PRVDRIWAXZY  4957 CHOICE ONE COMMUNICATIONS OF RHODE ISLAND, INC. 130      

Last updated: Tue, 04 May 2021 15:04:27 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.