Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N7IFF callsign genealogy
Currently held by CASTLEMAN, FREDERICK 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 N7IFF's current licensee, walking backwards.
- Castleman, Frederick LIDgranted 2026-02-27cancelled 2026-05-22
Successor callsigns
Callsigns held now by people who previously held N7IFF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N7IFF, oldest first.
- CASTLEMAN, FREDERICK L ID1999-01-18 → cancelled 2011-01-19
- Castleman, Frederick L ID2026-05-22 active