Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4CKO callsign genealogy
Currently held by Skramstad, Robert C
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 W4CKO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W4CKO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4CKO, oldest first.
- Casey, Michael A CA2004-08-17 → cancelled 2016-08-18
- Skramstad, Robert C MA2026-09-11 active