Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KX4U callsign genealogy
Currently held by STEENBURN, MARIE P
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 KX4U's current licensee, walking backwards.
- HARNDEN, CRAIG AFLgranted 2008-05-29cancelled 2016-11-01
Successor callsigns
Callsigns held now by people who previously held KX4U.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KX4U, oldest first.
- STEENBURN, MARIE P AL2004-10-13 → cancelled 2016-10-14
- HARNDEN, CRAIG A FL2026-08-18 active