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: 821 [Rate centres in NPA 821] [Dial plan for NPA 821]

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
821-821 A Williamston SC   624H ONVOY SPECTRUM, LLC 430   2025-01-03   
821-821 1 Williamston SC   624H ONVOY SPECTRUM, LLC 430      
821-821 2 Williamston SC   624H ONVOY SPECTRUM, LLC 430      
821-821 8 Williamston SC   624H ONVOY SPECTRUM, LLC 430      
821-864 A Joanna SC   624H ONVOY SPECTRUM, LLC 430   2025-01-03   
821-864 4 Joanna SC   624H ONVOY SPECTRUM, LLC 430      
821-864 6 Joanna SC   624H ONVOY SPECTRUM, LLC 430      
821-864 8 Joanna SC   624H ONVOY SPECTRUM, LLC 430      

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.