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

KB9YSI

Cancelled

Muhr, William C

Location: St Charles, IL
Class: Amateur Extra
Granted: 2001-01-23
Expires: 2011-01-23
FRN: 0004807269

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Vanity availability

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KB9YSI cleared its 2-year hold on 2009-10-09. Eligible for vanity application.

Last held by Muhr, William C (IL).

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 →

Prior holders later became

NF9Dactive· E
Muhr, William CILgranted 2017-10-04

License history

0 events

No recorded events.

More vanity slots coming available

From Illinois

All →

K9CYV 2026-09-10
KC9WOC 2026-09-10
KD9YXS 2026-09-10
KE9BGG 2026-09-10
KC9CJI 2026-09-11

Starting with KB9

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KB9FHA WI · 2026-09-27
KB9CMF WI · 2026-09-28

Full history → Vanity availability → Callsign genealogy →