Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4GRB callsign genealogy
Currently held by Sweeney Jr, Fred L
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 W4GRB's current licensee, walking backwards.
- SWEENEY JR, FRED LGAgranted 2012-02-09cancelled 2020-05-01
Successor callsigns
Callsigns held now by people who previously held W4GRB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4GRB, oldest first.
- Black, Glen R TN2002-03-21 → cancelled 2014-03-22
- Sweeney Jr, Fred L GA2020-05-01 active