Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA7ZRO callsign genealogy
Currently held by Embree, Todd 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 KA7ZRO's current licensee, walking backwards.
- Mondragon, IsaacORgranted 2021-02-23cancelled 2024-01-26
Successor callsigns
Callsigns held now by people who previously held KA7ZRO.
- Mondragon, IsaacORgranted 2024-07-26
All historical holders
Every license row we've seen with the callsign KA7ZRO, oldest first.
- Embree, Todd J CA1996-10-10 → cancelled 2008-10-11
- Mondragon, Isaac OR2024-01-26 → cancelled 2024-07-26