Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7HFJ callsign genealogy
Currently held by Schildknecht, Mark C
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 K7HFJ's current licensee, walking backwards.
- Schildknecht, Mark CWAgranted 2008-07-31cancelled 2010-11-05
Successor callsigns
Callsigns held now by people who previously held K7HFJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7HFJ, oldest first.
- SCHILDKNECHT, MARK C WA1988-02-02 → cancelled 2000-02-03
- Schildknecht, Mark C WA2020-11-05 active