Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ6DDH callsign genealogy
Currently held by Harlow, Douglas A
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 KJ6DDH's current licensee, walking backwards.
- Harlow, Douglas ACAgranted 2017-09-19cancelled 2017-10-11
Successor callsigns
Callsigns held now by people who previously held KJ6DDH.
All historical holders
Every license row we've seen with the callsign KJ6DDH, oldest first.
- MADEWELL, MARGARET E CA2009-10-30 → cancelled 2009-11-20
- Harlow, Douglas A CA2017-10-11 → cancelled 2018-03-23