Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N1OS callsign genealogy
Currently held by Buliszak, 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 N1OS's current licensee, walking backwards.
- Buliszak, Mark JMAgranted 1996-01-12cancelled 2002-07-12
Successor callsigns
Callsigns held now by people who previously held N1OS.
No current licensee on record previously held this callsign.