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: LNNGMIMNDS1

Remotes:

Switch Switch name Switch type
DMDLMIDDRS0  DIMONDALE  RSC 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
517-241 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-253 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-267 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-284 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-335 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-342 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-364 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-373 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-374 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-377 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-481 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-482 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-483 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-484 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-485 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-487 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-702 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-802 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      
517-885 A Lansing MI 9323 MICHIGAN BELL TEL CO 346      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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