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: 322

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-322 A Lombard IL   224C ONVOY, LLC 358   2024-04-12   
331-322 0 Lombard IL   224C ONVOY, LLC 358      
331-322 1 Lombard IL   224C ONVOY, LLC 358      
331-322 2 Lombard IL   224C ONVOY, LLC 358      
331-322 3 Lombard IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
331-322 4 Lombard IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
331-322 5 Lombard IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
331-322 6 Lombard IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
331-322 7 Lombard IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
331-322 8 Lombard IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
331-322 9 Lombard IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358      

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.