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: 860 [Rate centres in NPA 860] [Dial plan for NPA 860]

NXX: 431

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
860-431 A Simsbury CT NWHNCT02X5X  7421 AT&T - LOCAL 920      
860-431 0 Simsbury CT   199F BANDWIDTH.COM CLEC, LLC - CT 920   2015-02-14   
860-431 1 Simsbury CT   639C ONVOY, LLC - CT 920   2019-06-17   
860-431 2 Simsbury CT   639C ONVOY, LLC - CT 920   2016-03-24   
860-431 3 Simsbury CT   639C ONVOY, LLC - CT 920   2016-03-24   
860-431 4 Simsbury CT   318J COMCAST IP PHONE, LLC 920   2017-01-28   
860-431 5 Simsbury CT   9147 SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 920   2007-09-07   
860-431 6 Simsbury CT   639C ONVOY, LLC - CT 920   2024-06-07   
860-431 7 Simsbury CT   639C ONVOY, LLC - CT 920   2018-10-31   
860-431 8 Simsbury CT   639C ONVOY, LLC - CT 920   2018-10-31   
860-431 9 Simsbury CT   7421 AT&T - LOCAL 920      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.