Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA3TQD callsign genealogy
Currently held by O BRIEN, CHRISTIAN C
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 KA3TQD's current licensee, walking backwards.
- KB3BOIcancelledWALDORF REPEATER SUPPORT GROUPMDgranted 1996-04-15cancelled 2001-06-19
Successor callsigns
Callsigns held now by people who previously held KA3TQD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA3TQD, oldest first.
- WALDORF REPEATER SUPPORT GROUP MD2021-03-29 active
- O BRIEN, CHRISTIAN C— → cancelled 1998-01-21