Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N0SUK callsign genealogy
Currently held by Whipple, Mark 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 N0SUK's current licensee, walking backwards.
- Dauwalder, MonroeAPgranted 2025-09-04cancelled 2025-09-23
Successor callsigns
Callsigns held now by people who previously held N0SUK.
- Whipple, Mark SAZgranted 2017-03-14cancelled 2018-12-28
All historical holders
Every license row we've seen with the callsign N0SUK, oldest first.
- Whipple, Mark S AZ2017-02-14 → cancelled 2017-03-14
- Dauwalder, Monroe AP2025-09-23 active