Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1STU callsign genealogy
Currently held by Armstrong, Stuart B
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 W1STU's current licensee, walking backwards.
- Campbell, Stuart JAZgranted 2025-05-21cancelled 2025-06-10
Successor callsigns
Callsigns held now by people who previously held W1STU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1STU, oldest first.
- Armstrong, Stuart B DC2012-08-08 → cancelled 2024-08-09
- Campbell, Stuart J AZ2025-06-10 active