Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4TOO callsign genealogy
Currently held by SPROSTY, MICHELLE M
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 W4TOO's current licensee, walking backwards.
- SPROSTY, MICHELLE MTNgranted 2021-05-10cancelled 2021-06-25
Successor callsigns
Callsigns held now by people who previously held W4TOO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4TOO, oldest first.
- HINKLE JR, RAY C FL2005-08-19 → cancelled 2017-08-22
- SPROSTY, MICHELLE M TN2021-06-25 active