Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AK4TD callsign genealogy
Currently held by Hartman SR, Michael 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 AK4TD's current licensee, walking backwards.
- Hartman SR, Michael CALgranted 2010-08-18cancelled 2012-04-18
Successor callsigns
Callsigns held now by people who previously held AK4TD.
- Hartman SR, Michael CALgranted 2022-05-14