Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF7DS callsign genealogy
Currently held by Singer, Don
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 KF7DS's current licensee, walking backwards.
- Singer, Donald LORgranted 2011-07-14cancelled 2012-04-20
Successor callsigns
Callsigns held now by people who previously held KF7DS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KF7DS, oldest first.
- SPENCER JR, ARTHUR M WA1997-09-22 → cancelled 2009-09-23
- Singer, Don OR2022-02-03 active