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: 734 [Rate centres in NPA 734] [Dial plan for NPA 734]

NXX: 600

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
734-600 A Newport MI SFLDMITODS2  543C ONVOY, LLCV - MI 340      
734-600 0 Newport MI   991E BANDWIDTH.COM CLEC, LLC - MI 340   2019-01-03   
734-600 2 Newport MI   543C ONVOY, LLCV - MI 340   2020-02-08   
734-600 3 Newport MI   543C ONVOY, LLCV - MI 340   2020-02-08   
734-600 4 Newport MI   543C ONVOY, LLCV - MI 340   2021-01-31   
734-600 5 Newport MI   543C ONVOY, LLCV - MI 340   2021-01-31   
734-600 6 Newport MI   543C ONVOY, LLCV - MI 340   2018-11-24   
734-600 7 Newport MI   543C ONVOY, LLCV - MI 340   2021-01-31   
734-600 8 Newport MI   543C ONVOY, LLCV - MI 340   2020-09-12   
734-600 9 Newport MI   543C ONVOY, LLCV - MI 340   2020-09-12   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.