Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W7COK callsign genealogy
Currently held by SIMS MEMORIAL REPEATER GROUP
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by W7COK's current licensee, walking backwards.
- KC9IDWcancelledSIMS MEMORIAL REPEATER GROUPILgranted 2005-09-14cancelled 2006-01-06
Successor callsigns
Callsigns held now by people who previously held W7COK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7COK, oldest first.
- SIMS, RALPH E WY1996-02-21 → cancelled 2000-04-03
- SIMS MEMORIAL REPEATER GROUP IL2015-10-20 active