Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NB4A callsign genealogy
Currently held by Anderson Co Contest Group
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 NB4A's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held NB4A.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NB4A, oldest first.
- SWICEGOOD, THOMAS M SC2013-05-28 → cancelled 2025-08-12
- Anderson Co Contest Group KY2025-08-29 active