Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5FO callsign genealogy
Currently held by FALK, JAY S
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 K5FO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K5FO.
- ADAMS, CHARLES NAZgranted 2019-05-21cancelled 2022-01-14
All historical holders
Every license row we've seen with the callsign K5FO, oldest first.
- FALK, JAY S TX2021-06-23 active
- ADAMS, CHARLES N— → cancelled 1999-07-27