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: 231

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
660-231 A Deepwater MO KSCZMODR3MD  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 524      
660-231 0 Deepwater MO KSCZMODR3MD  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 524      
660-231 1 Deepwater MO KSCYMO55XSY  073H TELNYX LLC 524   2020-07-31   
660-231 4 Deepwater MO WRBGMO150MD  5607 CHARTER FIBERLINK - MISSOURI, LLC - MO 524   2025-01-19   
660-231 7 Deepwater MO KSCAMO961MD  508J CENTURYLINK COMMUNICATIONS, LLC 524   2013-10-31   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.