Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5PHO callsign genealogy
Currently held by MESSINA, MICHAEL R
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 K5PHO's current licensee, walking backwards.
- MESSINA, MICHAEL RTXgranted 2019-06-18cancelled 2019-07-20
Successor callsigns
Callsigns held now by people who previously held K5PHO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5PHO, oldest first.
- COSTA, CHARLES K TX1988-01-19 → cancelled 2000-01-20
- MESSINA, MICHAEL R TX2019-07-20 active