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: 404 [Rate centres in NPA 404] [Dial plan for NPA 404]

NXX: 770

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
404-770 A Atlanta GA ATLNGABU05Z  624H ONVOY SPECTRUM, LLC 438      
404-770 0 Atlanta GA   624H ONVOY SPECTRUM, LLC 438   2023-09-15   
404-770 1 Atlanta GA   624H ONVOY SPECTRUM, LLC 438   2023-09-15   
404-770 2 Atlanta GA   624H ONVOY SPECTRUM, LLC 438   2023-09-15   
404-770 3 Atlanta GA   624H ONVOY SPECTRUM, LLC 438   2023-09-15   
404-770 4 Atlanta GA   624H ONVOY SPECTRUM, LLC 438   2023-09-15   
404-770 5 Atlanta GA   624H ONVOY SPECTRUM, LLC 438   2023-09-15   
404-770 6 Atlanta GA   624H ONVOY SPECTRUM, LLC 438   2023-09-15   
404-770 7 Atlanta GA   624H ONVOY SPECTRUM, LLC 438   2023-09-15   
404-770 8 Atlanta GA   624H ONVOY SPECTRUM, LLC 438   2023-09-15   
404-770 9 Atlanta GA   624H ONVOY SPECTRUM, LLC 438   2023-09-15   

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.