Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1CSF callsign genealogy
Currently held by LAPIER, ELBRIDGE 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 W1CSF's current licensee, walking backwards.
- Filiau, CameronMAgranted 2018-01-05cancelled 2018-01-23
Successor callsigns
Callsigns held now by people who previously held W1CSF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1CSF, oldest first.
- LAPIER, ELBRIDGE A NY2004-12-14 → cancelled 2016-12-17
- Filiau, Cameron S MA2018-01-23 active