Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3DOF callsign genealogy
Currently held by Cramer, Eric E
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 W3DOF's current licensee, walking backwards.
- Cramer, Eric EMDgranted 2025-02-21cancelled 2025-03-29
Successor callsigns
Callsigns held now by people who previously held W3DOF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3DOF, oldest first.
- HALVORSON, ROBERT L CO2006-06-03 → cancelled 2018-06-12
- Cramer, Eric E MD2025-03-29 active