Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1DKR callsign genealogy
Currently held by SCHRAMM JR, MARTIN W
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 K1DKR's current licensee, walking backwards.
- Salahuddin, K YusufMDgranted 2008-04-24cancelled 2008-05-13
Successor callsigns
Callsigns held now by people who previously held K1DKR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1DKR, oldest first.
- SCHRAMM JR, MARTIN W MA1995-05-02 → cancelled 2007-05-03
- Salahuddin, K Yusuf MD2008-05-13 → cancelled 2020-05-14