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: 770 [Rate centres in NPA 770] [Dial plan for NPA 770]

NXX: 600

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
770-600 A Buchanan GA   624H ONVOY SPECTRUM, LLC 438   2025-08-24   
770-600 0 Buchanan GA   624H ONVOY SPECTRUM, LLC 438   2025-08-24   
770-600 6 Buchanan GA   624H ONVOY SPECTRUM, LLC 438   2025-08-25   
770-600 7 Buchanan GA   624H ONVOY SPECTRUM, LLC 438   2025-08-25   
770-600 8 Buchanan GA   624H ONVOY SPECTRUM, LLC 438   2025-08-25   

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.