Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K3CFI callsign genealogy
Currently held by Donahue, Michael L
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 K3CFI's current licensee, walking backwards.
- Donahue, Michael LMDgranted 2001-11-19cancelled 2003-02-05
Successor callsigns
Callsigns held now by people who previously held K3CFI.
- Donahue, Michael LMDgranted 2018-03-07