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: CHYNWYMAEMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
307-200 A Jackson WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-201 A Jackson WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-212 A Rock Springs WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-213 A Cody WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-222 A Cheyenne WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-223 A Laramie WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-224 A Casper WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-257 A Gillette WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-269 A Wheatland WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-271 A Powell WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-278 A Buffalo WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-288 A Evanston WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-298 A Douglas WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-313 A Evanston WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-439 A Casper WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-447 A Saratoga WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-459 A Cheyenne WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-460 A Laramie WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-461 A Sheridan WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-462 A Casper WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-463 A Riverton WY 9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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