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: 377

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
401-377 A Westerly RI ASWYRIYBRS1  9102 VERIZON NEW ENGLAND INC. 130      
401-377 0 Westerly RI   145J TERRA NOVA TELECOM INC. 130   2025-05-07   
401-377 1 Westerly RI   145J TERRA NOVA TELECOM INC. 130   2023-06-22   
401-377 2 Westerly RI ASWYRIYBRS1  9102 VERIZON NEW ENGLAND INC. 130      
401-377 3 Westerly RI EPRVRINB6MD  145J TERRA NOVA TELECOM INC. 130   2024-02-12   
401-377 4 Westerly RI ASWYRIYBRS1  9102 VERIZON NEW ENGLAND INC. 130      
401-377 6 Westerly RI   145J TERRA NOVA TELECOM INC. 130   2022-04-08   
401-377 7 Westerly RI ASWYRIYBRS1  9102 VERIZON NEW ENGLAND INC. 130      
401-377 8 Westerly RI ASWYRIYBRS1  9102 VERIZON NEW ENGLAND INC. 130      
401-377 9 Westerly RI ASWYRIYBRS1  9102 VERIZON NEW ENGLAND INC. 130      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.