Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6GSL callsign genealogy
Currently held by ROOT, W ARTHUR
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 W6GSL's current licensee, walking backwards.
- Mack, William JCAgranted 2015-12-18cancelled 2016-01-19
Successor callsigns
Callsigns held now by people who previously held W6GSL.
- Mack, William JIDgranted 2026-02-14
All historical holders
Every license row we've seen with the callsign W6GSL, oldest first.
- ROOT, W ARTHUR CA1994-05-31 → cancelled 2006-06-01
- Mack, William J CA2016-01-19 → cancelled 2016-11-01