Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5ZZB callsign genealogy
Currently held by MASON, WILBUR W
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 K5ZZB's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K5ZZB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5ZZB, oldest first.
- MASON, WILBUR W OK2006-08-30 → cancelled 2018-11-28
- LANNING, ROBERT O AR2018-12-18 active