Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W5MKD callsign genealogy
Currently held by JOHNSON, JOHN D
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 W5MKD's current licensee, walking backwards.
- DARTER, MICHAEL KTXgranted 2021-02-08cancelled 2021-06-22
Successor callsigns
Callsigns held now by people who previously held W5MKD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W5MKD, oldest first.
- JOHNSON, JOHN D OK1997-12-30 → cancelled 2009-12-31
- DARTER, MICHAEL K TX2021-06-22 active