Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WI7S callsign genealogy
Currently held by TATMAN, JOHN E
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 WI7S's current licensee, walking backwards.
- Kallio, Ilkka IWAgranted 2010-06-29cancelled 2019-12-10
Successor callsigns
Callsigns held now by people who previously held WI7S.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WI7S, oldest first.
- TATMAN, JOHN E WA2007-08-29 → cancelled 2019-11-22
- Kallio, Ilkka J WA2019-12-10 active