Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K7RKR callsign genealogy
Currently held by Ridd, Ryan K
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 K7RKR's current licensee, walking backwards.
- Ridd, Ryan KORgranted 2015-10-01cancelled 2016-04-29
Successor callsigns
Callsigns held now by people who previously held K7RKR.
- GRANICA, MARTIN PWYgranted 2012-07-20cancelled 2016-11-26
All historical holders
Every license row we've seen with the callsign K7RKR, oldest first.
- GRANICA, MARTIN P CO2002-04-19 → cancelled 2002-10-11
- Ridd, Ryan K OR2016-04-29 active
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