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.

NPA: 660 [Rate centres in NPA 660] [Dial plan for NPA 660]

NXX: 837

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
660-837 A Arrow Rock MO ARRKMOXADS0  1917 OTELCO MID-MISSOURI LLC 524      
660-837 2 Arrow Rock MO KSCZMODR3MD  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 524   2017-12-15   
660-837 3 Arrow Rock MO ARRKMOXADS0  1917 OTELCO MID-MISSOURI LLC 524      
660-837 4 Arrow Rock MO   145J TERRA NOVA TELECOM INC. 524   2025-07-24   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.