Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K3RUP callsign genealogy
Currently held by Montrose, James M
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 K3RUP's current licensee, walking backwards.
- Montrose, James MMDgranted 2007-08-13cancelled 2007-09-05
Successor callsigns
Callsigns held now by people who previously held K3RUP.
No current licensee on record previously held this callsign.