Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4IWK callsign genealogy
Currently held by McCurdy, Danny S
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 K4IWK's current licensee, walking backwards.
- McCurdy, Danny SFLgranted 2023-05-31cancelled 2026-05-30
Successor callsigns
Callsigns held now by people who previously held K4IWK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4IWK, oldest first.
- CERMAK, WILLIAM F FL1989-09-05 → cancelled 2001-09-06
- McCurdy, Danny S FL2026-05-30 active