Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0HJ callsign genealogy
Currently held by JACOBSON, HAROLD 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 K0HJ's current licensee, walking backwards.
- Spronk, Delmar EIAgranted 2005-12-14cancelled 2007-07-27
Successor callsigns
Callsigns held now by people who previously held K0HJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0HJ, oldest first.
- JACOBSON, HAROLD W ND1996-11-04 → cancelled 2004-07-02
- Spronk, Delmar E IA2017-05-02 active