Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1UDP callsign genealogy
Currently held by St Andre, George O
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 K1UDP's current licensee, walking backwards.
- MILLER, CHRISTOPHER PNCgranted 2020-02-18cancelled 2020-03-31
Successor callsigns
Callsigns held now by people who previously held K1UDP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1UDP, oldest first.
- St Andre, George O MA2007-11-30 → cancelled 2020-02-25
- MILLER, CHRISTOPHER P NC2020-03-31 active