Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AB0JT callsign genealogy
Currently held by Markham, Paul L
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 AB0JT's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AB0JT.
- Markham, Paul LCOgranted 2019-12-10
All historical holders
Every license row we've seen with the callsign AB0JT, oldest first.
- Markham, Paul L CO1998-06-04 → cancelled 2000-02-26
- Markham, Brian P TX2024-01-06 active