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: 998

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-998 A Downers Grove IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
331-998 0 Downers Grove IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
331-998 1 Downers Grove IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
331-998 2 Downers Grove IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358      
331-998 3 Downers Grove IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
331-998 4 Downers Grove IL   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
331-998 5 Downers Grove IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
331-998 6 Downers Grove IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-998 7 Downers Grove IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-998 8 Downers Grove IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
331-998 9 Downers Grove 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.