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: 390

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
779-390 A Lockport IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2024-05-11   
779-390 0 Lockport IL CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2024-05-15   
779-390 1 Lockport IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2024-05-13   
779-390 2 Lockport IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2024-05-13   
779-390 3 Lockport IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2024-12-12   
779-390 4 Lockport IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2024-12-12   
779-390 5 Lockport IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2024-12-12   
779-390 8 Lockport IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2024-05-11   
779-390 9 Lockport IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2024-05-11   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.