Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N0SLA callsign genealogy
Currently held by Hartmann, Willow R
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 N0SLA's current licensee, walking backwards.
- Hartmann Jr, William CFLgranted 2015-12-31cancelled 2023-11-14
Successor callsigns
Callsigns held now by people who previously held N0SLA.
- Ward, Tyler KWAgranted 2020-08-25
All historical holders
Every license row we've seen with the callsign N0SLA, oldest first.
- MC DONALD, ARDIS R SD1992-05-05 → cancelled 2004-05-06
- Ward, Tyler K WA2019-05-18 → cancelled 2020-08-25
- Hartmann, Willow R FL2023-11-14 active