Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4UU callsign genealogy
Currently held by Pianko, Jacob
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 KK4UU's current licensee, walking backwards.
- Pianko, JacobFLgranted 2014-02-11cancelled 2017-03-17
Successor callsigns
Callsigns held now by people who previously held KK4UU.
- Pianko, JacobFLgranted 2020-09-26
All historical holders
Every license row we've seen with the callsign KK4UU, oldest first.
- AYCOTH, ROBERT D NC1998-10-05 → cancelled 2010-10-06
- Pianko, Jacob FL2017-03-17 → cancelled 2020-09-26