Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N9JAK callsign genealogy
Currently held by CITKOWSKI, ROBERT E
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 N9JAK's current licensee, walking backwards.
- Sanderson Sr, Jack TWIgranted 2018-04-17cancelled 2018-06-26
Successor callsigns
Callsigns held now by people who previously held N9JAK.
- CITKOWSKI, ROBERT EWIgranted 2019-10-08
All historical holders
Every license row we've seen with the callsign N9JAK, oldest first.
- CITKOWSKI, ROBERT E WI1998-04-29 → cancelled 1999-12-28
- Sanderson Sr, Jack T WI2018-06-26 active