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: 231 [Rate centres in NPA 231] [Dial plan for NPA 231]

NXX: 401

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-401 A Traverse City MI TRCYMIMNVMD  116F PENINSULA FIBER NETWORK, LLC - MI 348      
231-401 0 Traverse City MI TRCYMIMNVMD  116F PENINSULA FIBER NETWORK, LLC - MI 348      
231-401 1 Traverse City MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      
231-401 2 Traverse City MI GDRPMIBL36Z  624H ONVOY SPECTRUM, LLC 348      
231-401 3 Traverse City MI GDRPMIBL36Z  624H ONVOY SPECTRUM, LLC 348      
231-401 7 Traverse City MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      
231-401 8 Traverse City MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      
231-401 9 Traverse City MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.