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: 983 [Rate centres in NPA 983] [Dial plan for NPA 983]

NXX: 223

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
983-223 A Longmont CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2026-03-20   
983-223 0 Longmont CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2026-03-20   
983-223 1 Longmont CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2026-03-20   
983-223 2 Longmont CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2026-03-20   
983-223 3 Longmont CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2026-03-20   
983-223 4 Longmont CO   078F BANDWIDTH.COM CLEC, LLC - CO 656   2026-08-08   
983-223 5 Longmont CO   026D ONVOY, LLC - CO 656   2026-08-21   
983-223 6 Longmont CO   026D ONVOY, LLC - CO 656   2026-08-21   
983-223 7 Longmont CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2026-05-31   
983-223 8 Longmont CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2026-05-31   
983-223 9 Longmont CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2026-05-31   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.