Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD0DY callsign genealogy
Currently held by WELTER, MARK 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 AD0DY's current licensee, walking backwards.
- WELTER, MARK LMNgranted 2004-12-21cancelled 2013-05-01
Successor callsigns
Callsigns held now by people who previously held AD0DY.
- WELTER, MARK LMNgranted 2025-06-11