Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1SOP callsign genealogy
Currently held by SWARTZ, NATHANIEL H
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 K1SOP's current licensee, walking backwards.
- Stevens, Bryan TGAgranted 2019-09-16cancelled 2019-10-05
Successor callsigns
Callsigns held now by people who previously held K1SOP.
- SWARTZ, NATHANIEL HTNgranted 2019-08-10
All historical holders
Every license row we've seen with the callsign K1SOP, oldest first.
- SWARTZ, NATHANIEL H MA1999-07-21 → cancelled 1999-10-19
- Stevens, Bryan T GA2019-10-05 active