Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9KMJ callsign genealogy
Currently held by MARSHE, PETER
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 W9KMJ's current licensee, walking backwards.
- Mattison Jr, Kenneth RWIgranted 2011-05-02cancelled 2015-01-23
Successor callsigns
Callsigns held now by people who previously held W9KMJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9KMJ, oldest first.
- MARSHE, PETER IL1988-04-26 → cancelled 2000-04-27
- Mattison Jr, Kenneth R WI2025-01-03 active