Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KK0TT callsign genealogy
Currently held by EHLEN, MARK J
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 KK0TT's current licensee, walking backwards.
- EHLEN, MARK JNDgranted 2019-07-16cancelled 2019-08-23
- KB0BLYno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KK0TT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KK0TT, oldest first.
- Collins, Lloyd C KS2006-01-07 → cancelled 2018-01-09
- EHLEN, MARK J ND2019-08-23 active