Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9UO callsign genealogy
Currently held by MASTERSON, DAVID B
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 W9UO's current licensee, walking backwards.
- MASTERSON, DAVID BINgranted 1994-10-20cancelled 2000-09-06
Successor callsigns
Callsigns held now by people who previously held W9UO.
- MINEAR, MARION WAZgranted 2016-08-08