Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4ZOU callsign genealogy
Currently held by JOHNSON, HEIDI C
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 KC4ZOU's current licensee, walking backwards.
- Johnson, Heidi CTNgranted 2015-11-23cancelled 2015-12-11
Successor callsigns
Callsigns held now by people who previously held KC4ZOU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC4ZOU, oldest first.
- JOHNSON, HEIDI C TN2003-08-08 → cancelled 2015-08-14
- Johnson, Heidi C TN2015-12-11 active