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: 573 [Rate centres in NPA 573] [Dial plan for NPA 573]

NXX: 256

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-256 A Columbia MO CLMAMOXADS0  9784 CENTURYTEL OF MISSOURI LLC (CNTL) DBA CENTURYLINK 521      
573-256 0 Columbia MO CLMAMOXADS0  9784 CENTURYTEL OF MISSOURI LLC (CNTL) DBA CENTURYLINK 521      
573-256 1 Columbia MO CLMAMOXADS0  9784 CENTURYTEL OF MISSOURI LLC (CNTL) DBA CENTURYLINK 521      
573-256 2 Columbia MO CLMAMOXADS0  9784 CENTURYTEL OF MISSOURI LLC (CNTL) DBA CENTURYLINK 521      
573-256 3 Columbia MO CLMAMOXADS0  9784 CENTURYTEL OF MISSOURI LLC (CNTL) DBA CENTURYLINK 521      
573-256 4 Columbia MO CLMAMOXADS0  9784 CENTURYTEL OF MISSOURI LLC (CNTL) DBA CENTURYLINK 521      
573-256 5 Columbia MO CLMAMOXADS0  9784 CENTURYTEL OF MISSOURI LLC (CNTL) DBA CENTURYLINK 521      
573-256 6 Columbia MO CLMAMOXADS0  9784 CENTURYTEL OF MISSOURI LLC (CNTL) DBA CENTURYLINK 521      
573-256 7 Columbia MO CLMAMOXADS0  9784 CENTURYTEL OF MISSOURI LLC (CNTL) DBA CENTURYLINK 521      
573-256 8 Columbia MO CLMAMOXADS0  9784 CENTURYTEL OF MISSOURI LLC (CNTL) DBA CENTURYLINK 521      
573-256 9 Columbia MO CLMAMOXAXCX  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 521   2009-08-20   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.