Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K3HM callsign genealogy
Currently held by MARK, HOWARD B
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 K3HM's current licensee, walking backwards.
- Smith, William FPAgranted 2021-05-26cancelled 2022-08-02
Successor callsigns
Callsigns held now by people who previously held K3HM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K3HM, oldest first.
- MARK, HOWARD B NV2010-07-17 → cancelled 2022-07-15
- Smith, William F PA2022-08-02 active