Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4SWD callsign genealogy
Currently held by MAYHORN, ROGER
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 N4SWD's current licensee, walking backwards.
- Bishop, Robert AVAgranted 2016-10-17cancelled 2016-11-05
Successor callsigns
Callsigns held now by people who previously held N4SWD.
- Bishop, Robert AVAgranted 2018-08-24
All historical holders
Every license row we've seen with the callsign N4SWD, oldest first.
- MAYHORN, ROGER VA1998-01-26 → cancelled 2010-01-27
- Bishop, Robert A VA2016-11-05 → cancelled 2018-08-24