Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WK1W callsign genealogy
Currently held by Shapiro, Ivan 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 WK1W's current licensee, walking backwards.
- Libanio, SilvioCTgranted 2022-06-30cancelled 2024-12-17
Successor callsigns
Callsigns held now by people who previously held WK1W.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WK1W, oldest first.
- COBURN, RONALD W NH2000-08-03 → cancelled 2012-10-10
- Shapiro, Ivan L ME2012-11-06 → cancelled 2024-12-04
- Libanio, Silvio CT2024-12-17 active