Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1IFS callsign genealogy
Currently held by Lupis, John 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 W1IFS's current licensee, walking backwards.
- Lupis, John MMAgranted 2020-07-07cancelled 2024-04-26
Successor callsigns
Callsigns held now by people who previously held W1IFS.
No current licensee on record previously held this callsign.