Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1MLK callsign genealogy
Currently held by HATCH, HAROLD P
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 W1MLK's current licensee, walking backwards.
- Ketner, Michael LSCgranted 2007-02-02cancelled 2007-03-23
Successor callsigns
Callsigns held now by people who previously held W1MLK.
- Ketner Mr, Michael LOHgranted 2017-03-03
All historical holders
Every license row we've seen with the callsign W1MLK, oldest first.
- HATCH, HAROLD P MA1994-08-23 → cancelled 2006-08-24
- Ketner Mr, Michael L OH2017-02-14 → cancelled 2017-03-03