Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC5RZY callsign genealogy
Currently held by GRUBB, JOSEPH A
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 KC5RZY's current licensee, walking backwards.
- Grubb, Joseph AKSgranted 2020-08-06cancelled 2020-08-25
Successor callsigns
Callsigns held now by people who previously held KC5RZY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC5RZY, oldest first.
- GRUBB, JOSEPH A TX2005-09-08 → cancelled 2017-12-08
- Grubb, Joseph A TX2020-08-25 active