Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K2DHR callsign genealogy
Currently held by O BRIEN, A GERARD
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 K2DHR's current licensee, walking backwards.
- O BRIEN, A GERARDNYgranted 2012-01-03cancelled 2015-05-09
- KB2HCUno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held K2DHR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K2DHR, oldest first.
- O BRIEN, KENNETH G NY2000-09-14 → cancelled 2012-12-12
- O BRIEN, A GERARD NY2025-04-15 active