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.
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Assumption, IL

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
217-226 A ASMPILXCRS0  1037 ILLINOIS CONSOLIDATED TEL. CO. 976      
217-910 A MTONILXC1MD  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 976      
217-910 0 MTONILXCX7X  073H TELNYX LLC 976   2022-08-07   
217-910 3 MTONILXC1MD  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 976   2017-09-11   
217-910 4 TYVLIL35DS0  197H COMPUTER TECHNIQUES, INC. - IL 976   2023-12-07   

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

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