Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9II callsign genealogy
Currently held by SUMONKA, MARK A
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 N9II's current licensee, walking backwards.
- SUMONKA, MARK ATNgranted 1995-07-26cancelled 2000-11-07
Successor callsigns
Callsigns held now by people who previously held N9II.
- GARSTKA, STANLEY JILgranted 2006-10-17cancelled 2015-01-21