Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1OWO callsign genealogy
Currently held by Hamburger, Michael L
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 W1OWO's current licensee, walking backwards.
- Hamburger, Michael LCTgranted 2026-02-27cancelled 2026-04-03
Successor callsigns
Callsigns held now by people who previously held W1OWO.
No current licensee on record previously held this callsign.