Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD6IV callsign genealogy
Currently held by CHEN, MARK T
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 AD6IV's current licensee, walking backwards.
- CHEN, MARK Tcancelled 1999-06-09
Successor callsigns
Callsigns held now by people who previously held AD6IV.
- CHEN, MARK TCAgranted 1999-11-18cancelled 2011-11-19