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]

NXX: 221

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
821-221 A Greenville SC GNVLSCMCXWX  616J LEAP TELECOM, LLC 430   2025-02-09   
821-221 0 Greenville SC GNVLSCMCXWX  616J LEAP TELECOM, LLC 430   2025-02-09   
821-221 1 Greenville SC   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 430   2026-09-18   
821-221 2 Greenville SC GNVLSCDT43Z  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 430   2025-05-16   
821-221 3 Greenville SC GNVLSCDT43Z  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 430   2025-05-16   
821-221 4 Greenville SC   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 430   2026-09-18   
821-221 5 Greenville SC GNVLSCDT43Z  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 430   2025-04-11   
821-221 6 Greenville SC GNVLSCDT43Z  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 430   2025-04-11   
821-221 7 Greenville SC GNVLSCDT43Z  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 430   2025-04-11   
821-221 8 Greenville SC GNVLSCDT43Z  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 430   2025-04-05   
821-221 9 Greenville SC GNVLSCDT43Z  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 430   2025-04-05   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.