Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1DDR callsign genealogy
Currently held by Rosengrant, David D
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 K1DDR's current licensee, walking backwards.
- Rosengrant, David DTXgranted 2014-10-24cancelled 2014-12-09
Successor callsigns
Callsigns held now by people who previously held K1DDR.
- RYAN, DREW DNYgranted 2010-01-22cancelled 2022-01-25
All historical holders
Every license row we've seen with the callsign K1DDR, oldest first.
- RYAN, DREW D NY2004-12-10 → cancelled 2010-01-22
- Rosengrant, David D TX2024-11-27 active