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: GYMNOKXAAMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
580-754 A Guymon OK 5257 LEVEL 3 COMMUNICATIONS, LLC - OK 546      
580-754 2 Guymon OK 5257 LEVEL 3 COMMUNICATIONS, LLC - OK 546   2017-10-01   
580-754 4 Guymon OK 5257 LEVEL 3 COMMUNICATIONS, LLC - OK 546   2022-08-08   
580-787 A Boise City OK 5257 LEVEL 3 COMMUNICATIONS, LLC - OK 546      
580-787 1 Boise City OK 5257 LEVEL 3 COMMUNICATIONS, LLC - OK 546   2023-03-30   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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