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.

Switch: FRMTMIMNRSA

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
231-924 A Fremont MI 9323 MICHIGAN BELL TEL CO 348      
231-928 A Fremont MI 9323 MICHIGAN BELL TEL CO 348      
231-928 0 Fremont MI 9323 MICHIGAN BELL TEL CO 348      
231-928 1 Fremont MI 9323 MICHIGAN BELL TEL CO 348      
231-928 2 Fremont MI 9323 MICHIGAN BELL TEL CO 348      
231-928 3 Fremont MI 9323 MICHIGAN BELL TEL CO 348      
231-928 4 Fremont MI 9323 MICHIGAN BELL TEL CO 348      

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

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