Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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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 0 Treece KS TULSOKTBXXZ  624H ONVOY SPECTRUM, LLC 538   2025-01-22   
620-406 1 Treece KS TULSOKTBXIZ  478J NUSO, LLC 538   2020-10-27   
620-406 2 Treece KS TULSOKTBXFY  986E BANDWIDTH.COM CLEC, LLC - KS 538   2021-07-18   
620-406 3 Treece KS TULSOKTBXIZ  478J NUSO, LLC 538   2023-12-22   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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