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: CSPRWYDN0MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
208-675 A Tygee Valley ID 689F ONVOY, LLC - ID 654      
307-218 A Sheridan WY 450F ONVOY, LLC - WY 654      
307-296 A Cody WY 450F ONVOY, LLC - WY 654      
307-316 A Cheyenne WY 450F ONVOY, LLC - WY 654      
307-417 A Rawlins WY 450F ONVOY, LLC - WY 654      
307-481 A Lusk WY 450F ONVOY, LLC - WY 654      
307-554 A Glenrock WY 450F ONVOY, LLC - WY 654      
307-800 A Kemmerer WY 450F ONVOY, LLC - WY 654      
406-643 A North Parkman MT 453F ONVOY, LLC MT 654      
406-840 A Silvertip MT 453F ONVOY, LLC MT 654      
435-292 A Coalville UT 871E ONVOY, LLC - UT 660      
970-489 A South Cheyenne CO 026D ONVOY, LLC CO 654      
970-499 A South Laramie CO 026D ONVOY, LLC CO 654      

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

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