Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF0XX callsign genealogy
Currently held by KELLGREN, FRANK L
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 KF0XX's current licensee, walking backwards.
- Fox, Bennett EKSgranted 2014-12-01cancelled 2015-01-10
Successor callsigns
Callsigns held now by people who previously held KF0XX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF0XX, oldest first.
- KELLGREN, FRANK L MO2002-01-23 → cancelled 2014-04-15
- Fox, Bennett E KS2025-05-22 active