Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4AO callsign genealogy
Currently held by TOWNSEND, ROBERT 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 KD4AO's current licensee, walking backwards.
- TOWNSEND, ROBERT BFLgranted 2013-11-22cancelled 2018-01-23
Successor callsigns
Callsigns held now by people who previously held KD4AO.
- TOWNSEND, ROBERT BFLgranted 2013-11-22cancelled 2018-01-23
All historical holders
Every license row we've seen with the callsign KD4AO, oldest first.
- TOWNSEND, ROBERT B FL2003-11-26 → cancelled 2013-11-22
- TOWNSEND, ROBERT B FL2018-01-23 active