Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD7JMB callsign genealogy
Currently held by Kajkowski, Charles F
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 KD7JMB's current licensee, walking backwards.
- Kajkowski, Charles FIDgranted 2017-07-11cancelled 2017-08-01
Successor callsigns
Callsigns held now by people who previously held KD7JMB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD7JMB, oldest first.
- Kajkowski, Charles F NV2000-06-20 → cancelled 2012-06-21
- Kajkowski, Charles F ID2017-08-01 active