Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5GEO callsign genealogy
Currently held by Lilly, Marc A
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 W5GEO's current licensee, walking backwards.
- Shield, Mark STXgranted 2024-02-22cancelled 2024-03-19
Successor callsigns
Callsigns held now by people who previously held W5GEO.
All historical holders
Every license row we've seen with the callsign W5GEO, oldest first.
- Wilson, Douglas H TX2000-08-29 → cancelled 2008-03-25
- Lilly, Marc A TX2015-05-02 → cancelled 2021-06-11
- Shield, Mark S TX2024-03-19 active