Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB2SBZ callsign genealogy
Currently held by Nicholson, 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 KB2SBZ's current licensee, walking backwards.
- Nicholson, Mark SNYgranted 2011-09-29cancelled 2016-04-09
Successor callsigns
Callsigns held now by people who previously held KB2SBZ.
- Nicholson, Mark SNYgranted 2016-12-06
All historical holders
Every license row we've seen with the callsign KB2SBZ, oldest first.
- NICHOLSON, MARK S NY1997-07-08 → cancelled 2006-10-25
- Nicholson, Mark S NY2016-04-09 → cancelled 2016-12-06