Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA4HBO callsign genealogy
Currently held by GILLAM, MICHAEL F
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 WA4HBO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held WA4HBO.
- GILLAM, MICHAEL FVAgranted 2003-07-18cancelled 2005-07-26
All historical holders
Every license row we've seen with the callsign WA4HBO, oldest first.
- GILLAM, MICHAEL F VA1998-05-01 → cancelled 2003-07-18
- GILLAM, MICHAEL F VA2005-07-26 → cancelled 2017-07-27