Local Calling Guide

Switch search

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

Switch: GRTWOHCK

Switch (link to prefixes) Switch name Company
GRTWOHCK0MD   601G HORIZON SERVICES, INC. - OH 

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.