Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9TNR callsign genealogy
Currently held by MARK, STEVE L
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 K9TNR's current licensee, walking backwards.
- MARK, STEVE LAZgranted 2018-02-20cancelled 2018-03-13
Successor callsigns
Callsigns held now by people who previously held K9TNR.
- MARK, STEVEN LAZgranted 2020-08-29
All historical holders
Every license row we've seen with the callsign K9TNR, oldest first.
- DUNCAN, RAE K IL1994-07-15 → cancelled 2006-07-18
- MARK, STEVE L AZ2018-03-13 → cancelled 2020-08-29