Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB1IOJ callsign genealogy
Currently held by Philbrook, Jason A
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 KB1IOJ's current licensee, walking backwards.
- Philbrook, Jason AMEgranted 2026-06-12cancelled 2026-08-21
Successor callsigns
Callsigns held now by people who previously held KB1IOJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB1IOJ, oldest first.
- Philbrook, Jason A ME2012-06-14 → cancelled 2024-06-26
- Philbrook, Jason A ME2026-08-21 active