Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4PSD callsign genealogy
Currently held by MACLACHLAN, ROBERT
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 K4PSD's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K4PSD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4PSD, oldest first.
- MACLACHLAN, ROBERT VA1997-03-12 → cancelled 2009-03-13
- DOUGLAS, PATRICK S KY2023-06-08 active