Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4NNO callsign genealogy
Currently held by CHAMBLESS II, MARDRE F
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 W4NNO's current licensee, walking backwards.
- CHAMBLESS II, MARDRE FFLgranted 2020-02-25cancelled 2020-03-17
Successor callsigns
Callsigns held now by people who previously held W4NNO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4NNO, oldest first.
- Chambless, Harold R FL2006-12-11 → cancelled 2019-02-12
- CHAMBLESS II, MARDRE F FL2020-03-17 active