Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N2OSO callsign genealogy
Currently held by Gruver, Philip 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 N2OSO's current licensee, walking backwards.
- Gruver, Philip LNYgranted 2016-02-16cancelled 2016-06-03
Successor callsigns
Callsigns held now by people who previously held N2OSO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N2OSO, oldest first.
- GRUVER, PHILIP L NY1991-12-10 → cancelled 2003-12-11
- Gruver, Philip L NY2026-07-07 active