Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB6TLB callsign genealogy
Currently held by SORENSEN, MARK F
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 WB6TLB's current licensee, walking backwards.
- Sorensen, Mark FCAgranted 2016-09-23cancelled 2016-10-18
Successor callsigns
Callsigns held now by people who previously held WB6TLB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB6TLB, oldest first.
- SORENSEN, MARK F CA1988-04-19 → cancelled 2000-04-20
- Sorensen, Mark F CA2026-08-12 active