Confidence: Medium · Source: FCC ULS · As of 2026-09-11
W2GPU callsign genealogy
Currently held by Sherman, Mark 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 W2GPU's current licensee, walking backwards.
- Sherman, Mark LMIgranted 2024-07-25cancelled 2024-08-31
Successor callsigns
Callsigns held now by people who previously held W2GPU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W2GPU, oldest first.
- HUMMERS JR, FRED G VT1991-10-15 → cancelled 1993-09-04
- Sherman, Mark L MI2024-08-31 active