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: CLMAMOWB0MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
573-285 A Clarksburg MO 4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521      
573-355 A Columbia MO 4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521      
573-415 A Jefferson City MO 4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521      
573-417 A Linn MO 4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521      
573-464 A California MO 4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521      
573-506 A Tebbetts MO 4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521      
573-520 A Russellville MO 4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521      
573-595 A Eugene MO 4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521      
573-622 A Clarksburg MO 4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521      
573-750 A Eugene MO 4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521      
573-809 A Mokane MO 4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521      

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

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