Local Calling Guide

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  • Enter full or partial CLLI code to see all matching switches.

Switch: SPFDILSL

Switch (link to prefixes) Switch name Company
SPFDILSLDS0 SPRINGFIELD LAKE DS0  9329 ILLINOIS BELL TEL CO 
SPFDILSLRS0 SPRINGFIELD LAKE RS0  9329 ILLINOIS BELL TEL CO 

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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