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.

Marmaduke, AR

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
870-597 A MRMDARXARS0  1144 BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 528      
870-597 0 MRMDARXARS0  1144 BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 528      
870-597 1 MRMDARXARS0  1144 BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 528      
870-597 2 MRMDARXARS0  1144 BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 528      
870-597 3 LTRKARFRXLY  348F ONVOY, LLC - AR 528   2022-12-12   
870-597 4 MRMDARXARS0  1144 BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 528      
870-597 5 LTRKARWTBMD  5179 LEVEL 3 COMMUNICATIONS, LLC - AR 528   2017-10-15   
870-597 6 MRMDARXARS0  1144 BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 528      
870-597 7   624H ONVOY SPECTRUM, LLC 528   2025-02-10   
870-597 8 MRMDARXARS0  1144 BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 528      
870-597 9 MRMDARXARS0  1144 BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 528      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.