Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6SPK callsign genealogy
Currently held by Markham, Spike
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 K6SPK's current licensee, walking backwards.
- Markham, SpikeCAgranted 2025-02-19cancelled 2025-04-01
Successor callsigns
Callsigns held now by people who previously held K6SPK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6SPK, oldest first.
- MC CLAIN, HUBERT R CA2005-01-14 → cancelled 2017-02-10
- Markham, Spike CA2025-04-01 active