Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 501 [Rate centres in NPA 501] [Dial plan for NPA 501]

NXX: 643

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
501-643 A Little Rock AR LTRKARFRXKZ  506J TWILIO INTERNATIONAL, INC. 528      
501-643 6 Little Rock AR LTRKARFRXKZ  506J TWILIO INTERNATIONAL, INC. 528   2021-07-21   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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