Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB1RTX callsign genealogy
Currently held by Molak, John 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 KB1RTX's current licensee, walking backwards.
- Salmon, Robert ETXgranted 2020-08-31cancelled 2020-11-24
Successor callsigns
Callsigns held now by people who previously held KB1RTX.
- Molak, John JFLgranted 2019-03-19
All historical holders
Every license row we've seen with the callsign KB1RTX, oldest first.
- Molak, John J NH2009-02-05 → cancelled 2009-03-31
- Salmon, Robert E TX2020-11-24 active