Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD0TOY callsign genealogy
Currently held by McMackin, Karen 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 KD0TOY's current licensee, walking backwards.
- McMackin, Karen MMOgranted 2023-11-09cancelled 2026-02-03
Successor callsigns
Callsigns held now by people who previously held KD0TOY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD0TOY, oldest first.
- JOHNSON, DAVE K MN2012-11-06 → cancelled 2024-12-04
- McMackin, Karen M MO2026-02-03 active