Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1WSM callsign genealogy
Currently held by McCallum III, William S
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 W1WSM's current licensee, walking backwards.
- McCallum III, William SMAgranted 2020-06-16cancelled 2020-10-06
Successor callsigns
Callsigns held now by people who previously held W1WSM.
No current licensee on record previously held this callsign.