Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N0TDO callsign genealogy
Currently held by Harmon Jr, Lloyd 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 N0TDO's current licensee, walking backwards.
- HARMON JR, LLOYD MCOgranted 2002-09-19cancelled 2004-03-31
Successor callsigns
Callsigns held now by people who previously held N0TDO.
All historical holders
Every license row we've seen with the callsign N0TDO, oldest first.
- HARMON JR, LLOYD M CO1992-10-13 → cancelled 2002-09-19
- Harmon Jr, Lloyd M CO2004-03-31 → cancelled 2007-06-23