Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9GH callsign genealogy
Currently held by Hollander, George 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 K9GH's current licensee, walking backwards.
- Masinter, JohnCOgranted 2017-06-19cancelled 2019-10-05
Successor callsigns
Callsigns held now by people who previously held K9GH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9GH, oldest first.
- Hollander, George A WI2007-07-02 → cancelled 2019-09-11
- Masinter, John CO2019-10-05 active