Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0ABD callsign genealogy
Currently held by RICH, MARK 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 K0ABD's current licensee, walking backwards.
- RICH, MARK MMAgranted 2018-02-23cancelled 2018-03-16
Successor callsigns
Callsigns held now by people who previously held K0ABD.
No current licensee on record previously held this callsign.