Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WB4CKI callsign genealogy
Currently held by Black, Donald R
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 WB4CKI's current licensee, walking backwards.
- Black, Donald RFLgranted 2019-09-26cancelled 2019-10-18
Successor callsigns
Callsigns held now by people who previously held WB4CKI.
No current licensee on record previously held this callsign.