Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N5MRK callsign genealogy
Currently held by Keller, Matthew R
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 N5MRK's current licensee, walking backwards.
- Keller, Matt ROKgranted 2003-05-30cancelled 2004-10-19
Successor callsigns
Callsigns held now by people who previously held N5MRK.
- BARNHART, WILLIAM TTXgranted 1988-07-26cancelled 2000-07-27