Local Calling Guide

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Switch: OTTMIATC

Switch (link to prefixes) Switch name Company
OTTMIATC0MD   2842 LOCAL TELEPHONE DATA SERVICES CORP. 
OTTMIATCDS0 OTTUMWA  9631 QWEST CORPORATION 

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: ISP Telecom

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