Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4YUM callsign genealogy
Currently held by Coulter, Brian
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 KD4YUM's current licensee, walking backwards.
- Coulter, BrianTNgranted 2021-01-07cancelled 2024-08-13
Successor callsigns
Callsigns held now by people who previously held KD4YUM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4YUM, oldest first.
- Pharis, Mark S TN2002-12-16 → cancelled 2015-03-10
- Coulter, Brian TN2024-08-13 active