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.

Jamesport, MO

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
660-684 A PRTNMOXADS0  1888 GRAND RIVER MUTUAL TEL CO 524      
660-684 0   1888 GRAND RIVER MUTUAL TEL CO 524      
660-684 1   1888 GRAND RIVER MUTUAL TEL CO 524      
660-684 2   1888 GRAND RIVER MUTUAL TEL CO 524      
660-684 3   1888 GRAND RIVER MUTUAL TEL CO 524      
660-684 4   1888 GRAND RIVER MUTUAL TEL CO 524      
660-684 5   1888 GRAND RIVER MUTUAL TEL CO 524      
660-684 6   1888 GRAND RIVER MUTUAL TEL CO 524      
660-684 7   4932 LEVEL 3 COMMUNICATIONS, LLC - MO 524   2026-04-15   
660-684 9   1888 GRAND RIVER MUTUAL TEL CO 524      

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.