Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB1ARZ callsign genealogy
Currently held by Rubin, Mark S
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 WB1ARZ's current licensee, walking backwards.
- Rubin, Mark SMAgranted 2001-12-04cancelled 2002-04-03
Successor callsigns
Callsigns held now by people who previously held WB1ARZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB1ARZ, oldest first.
- BOTELHO SR, RICHARD CT1988-03-15 → cancelled 2000-03-16
- Rubin, Mark S MA2022-12-13 active