Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4IWF callsign genealogy
Currently held by SCHAAP, JOSEPH R
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 K4IWF's current licensee, walking backwards.
- Roberts, Blake AFLgranted 2022-03-17cancelled 2022-04-15
Successor callsigns
Callsigns held now by people who previously held K4IWF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4IWF, oldest first.
- SCHAAP, JOSEPH R FL2012-01-06 → cancelled 2020-04-28
- Roberts, Blake A FL2022-04-15 active