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 1 Buchanan GA   067D ONVOY, LLC - GA 438   2025-10-12   
770-600 2 Buchanan GA   067D ONVOY, LLC - GA 438   2026-01-10   
770-600 3 Buchanan GA   067D ONVOY, LLC - GA 438   2026-02-20   
770-600 4 Buchanan GA   067D ONVOY, LLC - GA 438   2026-03-22   
770-600 5 Buchanan GA   8392 TELEPORT COMMUNICATIONS AMERICA, LLC - GA 438   2026-04-09   
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   
770-600 9 Buchanan GA   067D ONVOY, LLC - GA 438   2025-11-28   

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.