Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4HSN callsign genealogy
Currently held by Aitchison, Dale R
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 KD4HSN's current licensee, walking backwards.
- Aitchison, Dale RFLgranted 2018-04-12cancelled 2018-05-01
Successor callsigns
Callsigns held now by people who previously held KD4HSN.
- Tyson, Joseph RSCgranted 2018-08-28
All historical holders
Every license row we've seen with the callsign KD4HSN, oldest first.
- TYSON, JOSEPH R SC2002-09-04 → cancelled 2007-12-14
- Aitchison, Dale R FL2018-05-01 active