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

AC9JO

Cancelled

SIERP, MATTHEW D

Location: Indianapolis, IN
Class: Amateur Extra
Granted: 2013-05-14
Expires: 2023-05-14
Previous call: AC9DR
FRN: 0007767593

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Vanity availability

Available

Available now

AC9JO cleared its 2-year hold on 2016-10-09. Eligible for vanity application.

Last held by SIERP, MATTHEW D (IN).

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

AC9DRcancelled· E
Roberson, Donald HOHgranted 2021-02-27cancelled 2021-07-30
W9DHRcancelled· E
Roberson, DonaldWIgranted 2020-02-14cancelled 2021-02-27
N9DHRcancelled· E
Roberson, Donald HWIgranted 2018-07-31cancelled 2020-02-14

Prior holders later became

AC9JPcancelled· E
SIERP, MATTHEW DINgranted 2023-05-17cancelled 2024-04-19

License history

0 events

No recorded events.

More vanity slots coming available

From Indiana

All →

KB9LZK 2026-09-10
KC9CKD 2026-09-10
KD9YBK 2026-09-10
KE9AXL 2026-09-10
KE9BGO 2026-09-10

Starting with AC9

All →

AC9VZ WI · 2026-09-28
AC9DG IL · 2026-10-03
AC9DH IN · 2026-10-08
AC9OL WI · 2026-10-16
AC9DT MO · 2026-12-03

Full history → Vanity availability → Callsign genealogy →