Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4YOQ callsign genealogy
Currently held by CALLANAN, MICHAEL E
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 KD4YOQ's current licensee, walking backwards.
- CALLANAN, MICHAEL EFLgranted 2012-07-10cancelled 2012-11-14
Successor callsigns
Callsigns held now by people who previously held KD4YOQ.
- CALLANAN, MICHAEL EFLgranted 2012-07-10cancelled 2012-11-14
All historical holders
Every license row we've seen with the callsign KD4YOQ, oldest first.
- CALLANAN, MICHAEL E NY1997-12-15 → cancelled 2002-08-03
- CALLANAN, MICHAEL E FL2023-02-28 active