Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA4DPF callsign genealogy
Currently held by Hobby, Bobby 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 KA4DPF's current licensee, walking backwards.
- Branch, Ben HGAgranted 2010-01-15cancelled 2010-07-09
Successor callsigns
Callsigns held now by people who previously held KA4DPF.
- Hobby, Bobby LGAgranted 2018-03-22
All historical holders
Every license row we've seen with the callsign KA4DPF, oldest first.
- Hobby, Bobby L GA2006-06-08 → cancelled 2008-06-10
- Branch, Ben H GA2020-06-01 active