Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NF9O callsign genealogy
Currently held by HAMLOW, GERALD L
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 NF9O's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held NF9O.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NF9O, oldest first.
- HAMLOW, GERALD L IL1995-04-11 → cancelled 2004-01-18
- GREEN, G L WI2022-02-02 active