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: CHYNWYMAXKX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
208-998 A Tygee Valley ID 478J NUSO, LLC 654      
208-998 1 Tygee Valley ID 478J NUSO, LLC 654      
208-998 6 Tygee Valley ID 478J NUSO, LLC 654      
208-998 7 Tygee Valley ID 478J NUSO, LLC 654      
406-574 5 Silvertip MT 478J NUSO, LLC 654      
406-574 6 Silvertip MT 478J NUSO, LLC 654      
406-574 8 Silvertip MT 478J NUSO, LLC 654      
435-281 A Coalville UT 478J NUSO, LLC 660      
435-281 1 Coalville UT 478J NUSO, LLC 660      
970-489 9 South Cheyenne CO 478J NUSO, LLC 654      
970-802 0 South Cheyenne CO 478J NUSO, LLC 654      
970-802 6 South Cheyenne CO 478J NUSO, LLC 654      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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