Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KZ7S callsign genealogy
Currently held by OLSON, ROBERT J
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 KZ7S's current licensee, walking backwards.
- Merrill, Ryan AUTgranted 2013-12-13cancelled 2014-03-08
Successor callsigns
Callsigns held now by people who previously held KZ7S.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KZ7S, oldest first.
- OLSON, ROBERT J OR2003-09-30 → cancelled 2012-02-14
- Merrill, Ryan A UT2024-02-29 active