Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1DNA callsign genealogy
Currently held by YU, ALDER 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 W1DNA's current licensee, walking backwards.
- YU, AMY MMAgranted 2008-12-09cancelled 2011-09-30
Successor callsigns
Callsigns held now by people who previously held W1DNA.
No current licensee on record previously held this callsign.