Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1LFI callsign genealogy
Currently held by Wilfing, David A
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 W1LFI's current licensee, walking backwards.
- Wilfing, David ANHgranted 2026-05-14cancelled 2026-06-19
Successor callsigns
Callsigns held now by people who previously held W1LFI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1LFI, oldest first.
- KLAR, JOHN MA2006-02-08 → cancelled 2018-03-22
- Wilfing, David A NH2026-06-19 active