Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB4SIV callsign genealogy
Currently held by Darnell, Mark 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 WB4SIV's current licensee, walking backwards.
- Darnell, Mark AFLgranted 2021-11-22cancelled 2021-12-11
Successor callsigns
Callsigns held now by people who previously held WB4SIV.
No current licensee on record previously held this callsign.