uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-12

K2CPF callsign genealogy

Currently held by O BRIEN, THOMAS 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 K2CPF's current licensee, walking backwards.

  1. AC4HW
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held K2CPF.

No current licensee on record previously held this callsign.

← Back to K2CPF License history →