Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4MRK callsign genealogy
Currently held by Helms, Mark 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 W4MRK's current licensee, walking backwards.
- Helms, Mark RVAgranted 2023-05-10cancelled 2023-06-06
Successor callsigns
Callsigns held now by people who previously held W4MRK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4MRK, oldest first.
- WOODRUFF, MARK W AR2009-07-22 → cancelled 2021-04-22
- Helms, Mark R VA2023-06-06 active