Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4OFD callsign genealogy
Currently held by Colvin, Robert W
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 K4OFD's current licensee, walking backwards.
- Colvin, Robert WTNgranted 2025-02-21cancelled 2025-04-18
Successor callsigns
Callsigns held now by people who previously held K4OFD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4OFD, oldest first.
- ROCKWELL, RICHARD F VA2004-09-08 → cancelled 2016-09-09
- Colvin, Robert W TN2025-04-18 active