Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N0CMK callsign genealogy
Currently held by Harger, Spencer 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 N0CMK's current licensee, walking backwards.
- Harger, Spencer LIDgranted 2018-11-13cancelled 2022-11-04
Successor callsigns
Callsigns held now by people who previously held N0CMK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N0CMK, oldest first.
- HARGER, ROBERT E CO1999-05-19 → cancelled 2011-05-20
- Harger, Spencer L ID2022-11-04 active