Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4FO callsign genealogy
Currently held by LOEWY, JOSEPH
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 KB4FO's current licensee, walking backwards.
- Loewy, JonNCgranted 2023-05-31cancelled 2023-06-22
Successor callsigns
Callsigns held now by people who previously held KB4FO.
- LOEWY, JOSEPHNCgranted 2018-06-27
All historical holders
Every license row we've seen with the callsign KB4FO, oldest first.
- Loewy, Jon NC2023-06-22 active
- LOEWY, JOSEPH— → cancelled 1998-07-22