Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4HLM callsign genealogy
Currently held by MITCHELL JR, HARVEY L
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 W4HLM's current licensee, walking backwards.
- Helm, Adam CFLgranted 2023-03-13cancelled 2023-03-31
Successor callsigns
Callsigns held now by people who previously held W4HLM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4HLM, oldest first.
- MITCHELL JR, HARVEY L NC2010-08-26 → cancelled 2022-09-13
- Helm, Adam C FL2023-03-31 active