Local Calling Guide

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Switch: SLKDUTYI

Switch (link to prefixes) Switch name Company
SLKDUTYI3MD   3231 LEVEL 3 COMMUNICATIONS, LLC - UT 
SLKDUTYI4MD   073H TELNYX LLC 
SLKDUTYI5MD   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 
SLKDUTYIAMD   597F VOIP INNOVATIONS, LLC 

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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