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: 779 [Rate centres in NPA 779] [Dial plan for NPA 779]

NXX: 400

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
779-400 A De Kalb IL DKLBILRSMMD  259E YMAX COMMUNICATIONS CORP. - IL 364      
779-400 0 De Kalb IL DKLBILRSMMD  259E YMAX COMMUNICATIONS CORP. - IL 364      
779-400 1 De Kalb IL DKLBILRSMMD  259E YMAX COMMUNICATIONS CORP. - IL 364      
779-400 2 De Kalb IL DKLBILRSMMD  259E YMAX COMMUNICATIONS CORP. - IL 364      
779-400 3 De Kalb IL DKLBILRSMMD  259E YMAX COMMUNICATIONS CORP. - IL 364      
779-400 4 De Kalb IL DKLBILRSMMD  259E YMAX COMMUNICATIONS CORP. - IL 364      
779-400 5 De Kalb IL DKLBILRSNMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 364      
779-400 6 De Kalb IL DKLBILXAXBX  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 364      
779-400 8 De Kalb IL   224C ONVOY, LLC 364      
779-400 9 De Kalb IL DKLBILXAXBX  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 364      

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.