Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K8TDF callsign genealogy
Currently held by OLDFIELD, ROBERT S
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 K8TDF's current licensee, walking backwards.
- KC2ZCOcancelledDaffodil Amateur Radio ClubNYgranted 2010-09-03cancelled 2010-09-28
Successor callsigns
Callsigns held now by people who previously held K8TDF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K8TDF, oldest first.
- OLDFIELD, ROBERT S MI1994-08-23 → cancelled 2006-08-24
- Daffodil Amateur Radio Club NY2020-07-03 active