Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N9HCP callsign genealogy
Currently held by Pfeiffer, Charles 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 N9HCP's current licensee, walking backwards.
- Pfeiffer, Charles HILgranted 2020-01-21cancelled 2020-03-03
Successor callsigns
Callsigns held now by people who previously held N9HCP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9HCP, oldest first.
- KOERNER, ROBERT E WI1988-01-05 → cancelled 2000-01-06
- Pfeiffer, Charles H IL2020-03-03 active