Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9TSJ callsign genealogy
Currently held by Johnson, Theodore 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 W9TSJ's current licensee, walking backwards.
- Johnson, Theodore SFLgranted 2025-07-17cancelled 2025-08-05
Successor callsigns
Callsigns held now by people who previously held W9TSJ.
No current licensee on record previously held this callsign.