Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3HMK callsign genealogy
Currently held by Kocher, Howard M
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 W3HMK's current licensee, walking backwards.
- Hartzel, Edward WPAgranted 2014-10-03cancelled 2014-10-24
Successor callsigns
Callsigns held now by people who previously held W3HMK.
- Kocher, Howard MPAgranted 2020-05-01
All historical holders
Every license row we've seen with the callsign W3HMK, oldest first.
- SILVANEY, GEORGE A PA1988-03-01 → cancelled 2000-03-02
- Kocher, Howard M PA2008-07-18 → cancelled 2010-07-27
- Hartzel, Edward W PA2024-09-10 active