Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K8TEC callsign genealogy
Currently held by Caldwell, Terrence 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 K8TEC's current licensee, walking backwards.
- Caldwell, Terrence EOHgranted 2017-05-17cancelled 2019-06-07
Successor callsigns
Callsigns held now by people who previously held K8TEC.
- HARTWIG, RICHARD EOHgranted 2017-10-11
All historical holders
Every license row we've seen with the callsign K8TEC, oldest first.
- HARTWIG, RICHARD E OH2000-03-28 → cancelled 2007-12-21
- Caldwell, Terrence E OH2019-06-07 active