Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD1HD callsign genealogy
Currently held by MacMartin, Robert D
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 AD1HD's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AD1HD.
- MacMartin, Robert DNHgranted 2024-11-22