Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6SFB callsign genealogy
Currently held by Johnson, Michael T
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 W6SFB's current licensee, walking backwards.
- Johnson, Michael TCAgranted 2006-01-27cancelled 2006-02-25
Successor callsigns
Callsigns held now by people who previously held W6SFB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6SFB, oldest first.
- PAGEN, WILLIAM R CA1990-03-20 → cancelled 2002-03-21
- Johnson, Michael T CA2016-07-26 active