Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WW6B callsign genealogy
Currently held by ZAVISLAK, MARK J
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 WW6B's current licensee, walking backwards.
- ZAVISLAK, MARK JCAgranted 2013-05-01cancelled 2022-10-07
Successor callsigns
Callsigns held now by people who previously held WW6B.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WW6B, oldest first.
- CHRISTIAN, ALAN C CA2010-07-30 → cancelled 2022-09-20
- ZAVISLAK, MARK J CA2022-10-07 active