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.
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NPA: 620 [Rate centres in NPA 620] [Dial plan for NPA 620]

NXX: 406

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
620-406 A Treece KS TULSOKTBXIZ  478J NUSO, LLC 538      
620-406 1 Treece KS TULSOKTBXIZ  478J NUSO, LLC 538      
620-406 2 Treece KS TULSOKTBXFY  986E BANDWIDTH.COM CLEC, LLC - KS 538      
620-406 3 Treece KS TULSOKTBXIZ  478J NUSO, LLC 538      

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

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