Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N1HMH callsign genealogy
Currently held by SPROLES, WILLIAM 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 N1HMH's current licensee, walking backwards.
- Sproles, William RMAgranted 2023-10-28cancelled 2023-11-17
Successor callsigns
Callsigns held now by people who previously held N1HMH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1HMH, oldest first.
- SPROLES, WILLIAM R MA2010-01-20 → cancelled 2022-04-05
- Sproles, William R MA2023-11-17 active