Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4KF callsign genealogy
Currently held by Saff, Donald
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 KB4KF's current licensee, walking backwards.
- Saff, DonaldMDgranted 2020-10-19cancelled 2020-11-06
Successor callsigns
Callsigns held now by people who previously held KB4KF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB4KF, oldest first.
- SAFF, DONALD J MD1998-08-03 → cancelled 2010-08-04
- Saff, Donald MD2020-11-06 active