Confidence: Medium · Source: FCC ULS · As of 2026-09-09

KN4SO

Cancelled

Richardson, Marc E

Location: Byrdstown, TN
Class: Amateur Extra
Granted: 2017-09-02
Expires: 2027-09-02
Previous call: KN4ERH
FRN: 0026687947

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Vanity availability

Available

Available now

KN4SO cleared its 2-year hold on 2020-01-17. Eligible for vanity application.

Last held by Richardson, Marc E (TN).

Confidence: High

Cancelled licenses begin the 2-year hold immediately, so this date is the firm release date per §97.19. Already past — fileable subject to FCC verification.

Callsign genealogy

Full chain →

Previously held by current licensee

KN4ERHcancelled· E
Richardson, Marc ETNgranted 2017-07-17cancelled 2017-09-02

Prior holders later became

AD4CWactive· E
Richardson, Marc ETNgranted 2018-01-17

License history

0 events

No recorded events.

More vanity slots coming available

From Tennessee

All →

KG4TWC 2026-09-10
KK4LNE 2026-09-10
KK4LNK 2026-09-10
KQ4TPH 2026-09-10
KQ4UUA 2026-09-10

Starting with KN4

All →

KN4ZVG FL · 2026-09-17
KN4LGK GA · 2026-09-21
KN4VXC NC · 2026-09-21
KN4RPM VA · 2026-10-07
KN4GAM GA · 2026-10-12

Full history → Vanity availability → Callsign genealogy →