Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1MKC callsign genealogy
Currently held by Irwin, Daniel M
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 W1MKC's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W1MKC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1MKC, oldest first.
- Nault, Frank J CA2008-06-30 → cancelled 2020-09-02
- Irwin, Daniel M CT2021-01-01 active