Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N3AXR callsign genealogy
Currently held by KOLLMANN JR, JOHN G
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 N3AXR's current licensee, walking backwards.
- Costabile, James CMDgranted 2015-05-01cancelled 2018-12-21
Successor callsigns
Callsigns held now by people who previously held N3AXR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N3AXR, oldest first.
- KOLLMANN JR, JOHN G MD1994-08-15 → cancelled 2006-08-16
- Costabile, James C MD2018-12-21 active