Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W7SBM callsign genealogy
Currently held by Liljenquist, Michael D
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 W7SBM's current licensee, walking backwards.
- Liljenquist, Michael DWAgranted 2018-02-05cancelled 2018-03-06
Successor callsigns
Callsigns held now by people who previously held W7SBM.
No current licensee on record previously held this callsign.