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.

OCN: 821C INTRADO COMMUNICATIONS, LLC

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
989-272 6 Saginaw MI   344   2026-09-14   
989-320 A Saginaw MI SGNWMIFAXMY  344      
989-320 0 Saginaw MI SGNWMIFAXMY  344   2020-05-22   
989-320 1 Saginaw MI SGNWMIFAXMY  344   2020-05-22   
989-320 7 Saginaw MI   344   2026-09-14   
989-320 8 Saginaw MI SGNWMIFAXMY  344   2020-05-22   
989-320 9 Saginaw MI SGNWMIFAXMY  344   2020-05-22   
989-451 4 Saginaw MI   344   2026-09-14   

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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