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: 331 [Rate centres in NPA 331] [Dial plan for NPA 331]

NXX: 324

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-324 A Yorkville IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-05-04   
331-324 0 Yorkville IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-05-04   
331-324 1 Yorkville IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-05-04   
331-324 8 Yorkville IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-06-30   
331-324 9 Yorkville IL CHCGIL24DS6  224C ONVOY, LLC 358   2025-01-06   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.