Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1GDM callsign genealogy
Currently held by Shanahan, Daniel P
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 W1GDM's current licensee, walking backwards.
- Shanahan, Daniel PHIgranted 2021-09-01cancelled 2021-10-02
Successor callsigns
Callsigns held now by people who previously held W1GDM.
No current licensee on record previously held this callsign.