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

KB1EFU

Cancelled

ROSEN, JACOB J

Location: SHREWSBURY, MA
Class: General
Granted: 2009-03-31
Expires: 2019-06-29
FRN: 0016694606

Get notified about status changes and vanity availability for this callsign.

Vanity availability

Available

Available now

KB1EFU cleared its 2-year hold on 2011-07-03. Eligible for vanity application.

Last held by ROSEN, JACOB J (MA).

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

W1JJRactive· G
ROSEN, JACOB JFLgranted 2019-05-25

License history

0 events

No recorded events.

More vanity slots coming available

From Massachusetts

All →

KB1ITH 2026-09-12
KB1YQO 2026-09-13
N1NMG 2026-09-14
N2SLK 2026-09-14
WA1DUZ 2026-09-14

Starting with KB1

All →

KB1HYE FL · 2026-09-12
KB1ITH MA · 2026-09-12
KB1YQF ME · 2026-09-13
KB1YQH ME · 2026-09-13
KB1YQJ RI · 2026-09-13

Full history → Vanity availability → Callsign genealogy →