Confidence: Medium · Source: FCC ULS · As of 2026-09-10
KY4SJ
ActiveByun, Soo Duk
- Location
- Morrisville, NC
- Class
- Amateur Extra
- Granted
- 2021-07-02
- Expires
- 2031-07-02
- Previous call
- KE8SKN
- FRN
- 0031103005
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Vanity availability
HeldCurrently held
KY4SJ is held by an active license; it isn't a vanity slot right now.
Vanity availability dates are computed from FCC §97.19's hold periods: 2 years from the cancellation date for cancelled or terminated licenses, 4 years from the expiration date for expired licenses (2-year renewal grace + 2-year hold).
Callsign genealogy
Full chain →Previously held by current licensee
- Byun, Soo DukNCgranted 2021-07-02cancelled 2022-10-21
License history
0 eventsNo recorded events.