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.

Switch: TULSOKTBX6Z

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
918-888 7 Catoosa OK 508J CENTURYLINK COMMUNICATIONS, LLC 538   2017-02-16   
918-890 7 Drumright OK 508J CENTURYLINK COMMUNICATIONS, LLC 538   2017-04-07   
918-956 7 Cleveland OK 508J CENTURYLINK COMMUNICATIONS, LLC 538   2017-04-06   
918-957 7 Broken Arrow OK 508J CENTURYLINK COMMUNICATIONS, LLC 538   2017-04-06   
918-965 7 Claremore OK 508J CENTURYLINK COMMUNICATIONS, LLC 538   2017-02-16   
918-972 7 Dewey OK 508J CENTURYLINK COMMUNICATIONS, LLC 538   2017-04-07   
918-974 7 Poteau OK 508J CENTURYLINK COMMUNICATIONS, LLC 538   2017-04-08   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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