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: 331 [Rate centres in NPA 331] [Dial plan for NPA 331]

NXX: 226

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-226 A Naperville IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-226 0 Naperville IL CHCGIL24DS6  224C ONVOY, LLC 358   2017-06-22   
331-226 1 Naperville IL CHCGIL24DS6  224C ONVOY, LLC 358   2017-06-22   
331-226 2 Naperville IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2017-06-06   
331-226 3 Naperville IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2017-05-18   
331-226 4 Naperville IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2017-05-18   
331-226 5 Naperville IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2017-05-18   
331-226 6 Naperville IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2017-05-18   
331-226 7 Naperville IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2017-05-18   
331-226 8 Naperville IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2017-05-18   
331-226 9 Naperville IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2017-05-18   

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.