Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4KSR callsign genealogy
Currently held by MEASURES, 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 KD4KSR's current licensee, walking backwards.
- Measures, Robert BTNgranted 2012-11-26cancelled 2016-01-01
Successor callsigns
Callsigns held now by people who previously held KD4KSR.
- MEASURES, ROBERT BTNgranted 2000-08-08cancelled 2012-08-09
All historical holders
Every license row we've seen with the callsign KD4KSR, oldest first.
- MEASURES, ROBERT B TN1993-05-04 → cancelled 2000-08-08
- Measures, Robert B TN2016-01-01 active