Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7TR callsign genealogy
Currently held by Singh, Ravinder
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 K7TR's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K7TR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7TR, oldest first.
- Johnsen, Robert J AZ2017-03-30 → cancelled 2018-05-13
- Singh, Ravinder WA2020-06-01 active