Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NL7AF callsign genealogy
Currently held by BERTHOLF JR, CHARLES M
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 NL7AF's current licensee, walking backwards.
- LANDIS, JONATHAN DAKgranted 2018-02-13cancelled 2018-05-04
Successor callsigns
Callsigns held now by people who previously held NL7AF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NL7AF, oldest first.
- BERTHOLF JR, CHARLES M AK1988-02-23 → cancelled 2000-02-24
- LANDIS, JONATHAN D AK2018-05-04 active