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Confidence: Medium · Source: FCC ULS · As of 2026-09-10

KC5JKN

Cancelled

Sims, David

Location: BOULDER, CO
Class: Amateur Extra
Granted: 2023-12-09
Expires: 2033-12-09
Previous call: KF0OGI
FRN: 0034490854

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Vanity availability

238d

Available on 2027-05-06

KC5JKN cancelled on 2025-05-06. Hold ends in 238 days.

Last held by Sims, David (CO).

Confidence: High

Cancelled licenses begin the 2-year hold immediately on the cancellation date, so this is the firm release date per §97.19.

Callsign genealogy

Previously held by current licensee

KF0OGIcancelled· T
Sims, DavidCOgranted 2023-11-21cancelled 2023-12-09

Prior holders later became

W4HOactive· E
Sims, DavidCOgranted 2025-05-06

License history

0 events

No recorded events.

More vanity slots coming available

From Colorado

KB7PWB 2026-09-10
KF0RME 2026-09-10
KD0TBG 2026-09-11
KD0TBU 2026-09-11
KD0TBW 2026-09-11

Starting with KC5

KC5RKS MS · 2026-09-10
KC5JA TX · 2026-09-16
KC5BFY CA · 2026-10-01
KC5QVN NM · 2026-10-01
KC5YLL TX · 2026-10-29

Full history → Vanity availability → Callsign genealogy →