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: 989 [Rate centres in NPA 989] [Dial plan for NPA 989]

NXX: 558

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
989-558 A Saginaw MI SGNWMIACBMD  197D VONAGE AMERICA LLC 344      
989-558 0 Saginaw MI SGNWMIACBMD  197D VONAGE AMERICA LLC 344   2018-04-30   
989-558 1 Saginaw MI SGNWMIACDS1  933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 344   2019-10-28   
989-558 3 Saginaw MI SGNWMIECXQX  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 344   2019-08-10   
989-558 4 Saginaw MI SGNWMIFAX7X  5562 METROPCS, INC. 344   2023-02-03   
989-558 5 Saginaw MI SGNWMIFAX7X  5562 METROPCS, INC. 344   2023-02-03   
989-558 6 Saginaw MI SGNWMIFAXNX  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 344   2019-06-20   
989-558 8 Saginaw MI SGNWMIFAXWY  624H ONVOY SPECTRUM, LLC 344   2021-10-22   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.