Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB5MBL callsign genealogy
Currently held by Mattson, William B
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 WB5MBL's current licensee, walking backwards.
- Mattson, William BTXgranted 2021-05-24cancelled 2021-06-12
Successor callsigns
Callsigns held now by people who previously held WB5MBL.
No current licensee on record previously held this callsign.