Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9TNH callsign genealogy
Currently held by Heiser, Therese N
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 W9TNH's current licensee, walking backwards.
- Heiser, Therese NINgranted 2016-09-22cancelled 2016-10-14
Successor callsigns
Callsigns held now by people who previously held W9TNH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9TNH, oldest first.
- VRUBLE, STANLEY P IL1994-01-18 → cancelled 2006-01-19
- Heiser, Therese N IN2016-10-14 active