Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9RP callsign genealogy
Currently held by NICHOLSON, CHRISTOPHER S
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 W9RP's current licensee, walking backwards.
- NICHOLSON, CHRISTOPHER SINgranted 2011-04-12cancelled 2015-12-19
Successor callsigns
Callsigns held now by people who previously held W9RP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9RP, oldest first.
- TREMONT, ROLLIN I IL2003-10-09 → cancelled 2015-12-01
- NICHOLSON, CHRISTOPHER S IN2025-11-27 active