Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4RTU callsign genealogy
Currently held by Upright, RICHARD T
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 K4RTU's current licensee, walking backwards.
- Upright, Richard TTNgranted 2008-03-24cancelled 2008-06-18
Successor callsigns
Callsigns held now by people who previously held K4RTU.
No current licensee on record previously held this callsign.