Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9TIE callsign genealogy
Currently held by Tan, Michael 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 W9TIE's current licensee, walking backwards.
- Tan, Michael RILgranted 2022-01-11cancelled 2022-01-29
Successor callsigns
Callsigns held now by people who previously held W9TIE.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9TIE, oldest first.
- FIRCHAU, ROBERT E IL2006-12-22 → cancelled 2019-02-12
- Tan, Michael R IL2022-01-29 active