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: CLMAMOXAX4X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
573-228 6 Columbia MO 593K MCC TELEPHONY LLC 521   2011-07-18   
573-228 9 Columbia MO 593K MCC TELEPHONY LLC 521   2010-06-13   
573-397 6 Columbia MO 593K MCC TELEPHONY LLC 521   2012-04-23   
573-476 6 Columbia MO 593K MCC TELEPHONY LLC 521   2016-10-01   
573-488 8 Ashland MO 593K MCC TELEPHONY LLC 521   2022-09-29   
573-507 6 Columbia MO 593K MCC TELEPHONY LLC 521   2019-10-10   
573-514 7 Columbia MO 593K MCC TELEPHONY LLC 521   2012-11-23   
573-607 9 Columbia MO 593K MCC TELEPHONY LLC 521   2017-08-23   
573-818 1 Columbia MO 593K MCC TELEPHONY LLC 521   2018-05-20   

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

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