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: 508 [Rate centres in NPA 508] [Dial plan for NPA 508]

NXX: 389

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
508-389 A Westboro MA WSBOMASUDS1  9102 VERIZON NEW ENGLAND INC. 128      
508-389 0 Westboro MA   9102 VERIZON NEW ENGLAND INC. 128      
508-389 1 Westboro MA   9102 VERIZON NEW ENGLAND INC. 128      
508-389 2 Westboro MA   9102 VERIZON NEW ENGLAND INC. 128      
508-389 3 Westboro MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2018-06-15   
508-389 4 Westboro MA   073H TELNYX LLC 128   2017-04-26   
508-389 5 Westboro MA   9102 VERIZON NEW ENGLAND INC. 128      
508-389 6 Westboro MA   9102 VERIZON NEW ENGLAND INC. 128      
508-389 7 Westboro MA   9102 VERIZON NEW ENGLAND INC. 128      
508-389 8 Westboro MA   9102 VERIZON NEW ENGLAND INC. 128      
508-389 9 Westboro MA   9102 VERIZON NEW ENGLAND INC. 128      

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.