Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD4K callsign genealogy
Currently held by ROTH, STEVEN C
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 AD4K's current licensee, walking backwards.
- ROTH, STEVEN CFLgranted 2016-03-29cancelled 2020-11-03
Successor callsigns
Callsigns held now by people who previously held AD4K.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AD4K, oldest first.
- NORDSKOG, SUSAN G NV2008-12-02 → cancelled 2020-10-14
- ROTH, STEVEN C FL2020-11-03 active