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: 940 [Rate centres in NPA 940] [Dial plan for NPA 940]

NXX: 644

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
940-644 A Chico TX CHICTXXARS0  2114 BRIGHTSPEED OF TEXAS, INC. 552      
940-644 0 Chico TX   2114 BRIGHTSPEED OF TEXAS, INC. 552      
940-644 1 Chico TX   2114 BRIGHTSPEED OF TEXAS, INC. 552      
940-644 2 Chico TX   2114 BRIGHTSPEED OF TEXAS, INC. 552      
940-644 3 Chico TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2014-06-18   
940-644 4 Chico TX   903C ONVOY, LLC - TX 552   2020-08-16   
940-644 5 Chico TX   2114 BRIGHTSPEED OF TEXAS, INC. 552      
940-644 6 Chico TX   2114 BRIGHTSPEED OF TEXAS, INC. 552      
940-644 7 Chico TX   903C ONVOY, LLC - TX 552   2017-06-06   
940-644 8 Chico TX   508J CENTURYLINK COMMUNICATIONS, LLC 552   2014-05-19   
940-644 9 Chico TX   903C ONVOY, LLC - TX 552   2020-08-16   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.