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: LAMRMOOVRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
417-681 A Lamar MO 9533 SOUTHWESTERN BELL 522      
417-681 0 Lamar MO 9533 SOUTHWESTERN BELL 522      
417-681 1 Lamar MO 9533 SOUTHWESTERN BELL 522      
417-681 3 Lamar MO 9533 SOUTHWESTERN BELL 522      
417-681 4 Lamar MO 9533 SOUTHWESTERN BELL 522      
417-681 5 Lamar MO 9533 SOUTHWESTERN BELL 522      
417-682 A Lamar MO 9533 SOUTHWESTERN BELL 522      

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

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