Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB9CJ callsign genealogy
Currently held by Maassen, John P
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 AB9CJ's current licensee, walking backwards.
- Maassen, John PINgranted 2001-06-11cancelled 2001-06-19
Successor callsigns
Callsigns held now by people who previously held AB9CJ.
- Maassen, John PKYgranted 2022-04-14