Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF5EMP callsign genealogy
Currently held by SCHAAF, JOHN W
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 KF5EMP's current licensee, walking backwards.
- SCHAAF, CHRISTOPHER ANMgranted 2018-01-12cancelled 2020-05-05
Successor callsigns
Callsigns held now by people who previously held KF5EMP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF5EMP, oldest first.
- SCHAAF, JOHN W NM2010-01-07 → cancelled 2018-05-17
- Schaaf, Christopher A TX2020-05-05 active