Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4TSU callsign genealogy
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 W4TSU's current licensee, walking backwards.
- Cleckler, Eric LALgranted 2021-06-22cancelled 2022-09-09
Successor callsigns
Callsigns held now by people who previously held W4TSU.
- HAYNES JR, WILLIAM AALgranted 2009-05-09cancelled 2017-10-04
All historical holders
Every license row we've seen with the callsign W4TSU, oldest first.
- Cleckler, Eric L AL2022-09-09 active
- —— → cancelled 1999-07-29