Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5AMU callsign genealogy
Currently held by John, Michael M
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 K5AMU's current licensee, walking backwards.
- John, Michael MTXgranted 2013-05-24cancelled 2013-07-06
Successor callsigns
Callsigns held now by people who previously held K5AMU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5AMU, oldest first.
- CHANCE, JACK S TX1999-10-02 → cancelled 2005-09-01
- John, Michael M TX2023-05-31 active