Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4IS callsign genealogy
Currently held by COOKSON, ROBERT D
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 KM4IS's current licensee, walking backwards.
- Cookson, Robert DNCgranted 2002-09-12cancelled 2002-10-04
Successor callsigns
Callsigns held now by people who previously held KM4IS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KM4IS, oldest first.
- COOKSON, ROBERT D VA1988-10-18 → cancelled 2000-10-19
- Cookson, Robert D NC2012-08-02 → cancelled 2024-10-05