Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1JMH callsign genealogy
Currently held by Sapiro, Erwin H
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 K1JMH's current licensee, walking backwards.
- Harding, Justin MMAgranted 2015-11-18cancelled 2016-06-11
Successor callsigns
Callsigns held now by people who previously held K1JMH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1JMH, oldest first.
- Sapiro, Erwin H FL2002-09-06 → cancelled 2014-11-25
- Harding, Justin M MA2026-05-29 active