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: 500

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-500 A Geneva IL CHCGILWURMD  965H FRACTEL, LLC 358      
331-500 0 Geneva IL CHCGILWURMD  965H FRACTEL, LLC 358      
331-500 1 Geneva IL CHCGIL245MD  073H TELNYX LLC 358      
331-500 2 Geneva IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-500 3 Geneva IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-500 4 Geneva IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-500 5 Geneva IL CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358      
331-500 6 Geneva IL CHCGILMF2MD  6529 T-MOBILE USA, INC. 358      
331-500 7 Geneva IL CHCGILMF2MD  6529 T-MOBILE USA, INC. 358      
331-500 8 Geneva IL   515J IP HORIZON LLC 358      
331-500 9 Geneva IL CHCGIL24DS6  224C ONVOY, LLC 358      

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.