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: MRQTMIMNDS1

Remotes:

Switch Switch name Switch type
CHMPMIMNRSA  CHAMPION  DE5 
CHNGMICRRSA  CHANNING  DE5 
CRFLMIMNRSA  CRYSTAL FALLS  DE5 
GWNNMIMNRSA  GWINN  DE5 
HRVYMIMNRSA  HARVEY  DLU 
ISHPMIMNRSA  ISHPEMING  DE5 
MCHGMIMNRSA  MICHIGAMME  DE5 
NGNEMIMNRSA  NEGAUNEE  DE5 
RPBLMIMNRSA  REPUBLIC  DE5 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
906-345 A Big Bay MI 9323 MICHIGAN BELL TEL CO 342      
906-345 0 Big Bay MI 9323 MICHIGAN BELL TEL CO 342      
906-345 9 Big Bay MI 9323 MICHIGAN BELL TEL CO 342      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.