Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9PHI callsign genealogy
Currently held by Masterson, Nicholas J
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 K9PHI's current licensee, walking backwards.
- Masterson, NicholasALgranted 2024-08-21cancelled 2025-04-11
Successor callsigns
Callsigns held now by people who previously held K9PHI.
No current licensee on record previously held this callsign.