Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4HCK callsign genealogy
Currently held by Shipman, Michael O
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 W4HCK's current licensee, walking backwards.
- Shipman, Michael OSCgranted 2022-02-22cancelled 2022-03-15
Successor callsigns
Callsigns held now by people who previously held W4HCK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4HCK, oldest first.
- BRYAN SR, FREDERICK C TN2006-10-12 → cancelled 2019-02-12
- Shipman, Michael O SC2022-03-15 active