Apparatus

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sensors Mode-S transponder

ACEFF0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N9323Z · BOEING B-17 Flying Fortress · operated by AMERICAN AIRPOWER HERITAGE FLY MUSEU

Hex
ACEFF0
Octal
53167760
Decimal
11,333,616
Country
US
Tail
N9323Z
Type
B17
No current signal · last broadcast 1d ago
Flights observed
121
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S ACEFF0.

Country allocation

The ICAO 24-bit address ACEFF0 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 1 distinct

Callsign Airline Flights Last seen
N9323Z - 121 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 N9323Z - Jul 20, 16:15 UTCJul 20, 18:20 UTC2h 5m
2026-07-19 N9323Z - Jul 19, 23:40 UTCJul 20, 00:00 UTC20m
2026-07-19 N9323Z - Jul 19, 21:20 UTCJul 19, 23:15 UTC1h 55m
2026-07-19 N9323Z - Jul 19, 20:35 UTCJul 19, 20:55 UTC20m
2026-07-18 N9323Z - Jul 18, 19:00 UTCJul 18, 19:30 UTC30m
2026-07-18 N9323Z - Jul 18, 18:00 UTCJul 18, 18:30 UTC30m
2026-07-18 N9323Z - Jul 18, 16:30 UTCJul 18, 16:50 UTC20m
2026-07-18 N9323Z TOL → TOL Jul 18, 15:30 UTCJul 18, 15:55 UTC25m
2026-07-18 N9323Z - Jul 18, 14:35 UTCJul 18, 14:55 UTC20m
2026-07-18 N9323Z - Jul 18, 12:45 UTCJul 18, 14:00 UTC1h 15m
2026-07-13 N9323Z - Jul 13, 14:45 UTCJul 13, 15:45 UTC1h 0m
2026-07-13 N9323Z - Jul 13, 13:30 UTCJul 13, 14:10 UTC40m
2026-07-12 N9323Z - Jul 12, 19:15 UTCJul 12, 20:25 UTC1h 10m
2026-07-12 N9323Z - Jul 12, 18:10 UTCJul 12, 18:20 UTC10m
2026-07-12 N9323Z - Jul 12, 14:40 UTCJul 12, 14:50 UTC10m
2026-07-11 N9323Z - Jul 11, 21:15 UTCJul 11, 21:35 UTC20m
2026-07-11 N9323Z - Jul 11, 20:10 UTCJul 11, 20:30 UTC20m
2026-07-11 N9323Z - Jul 11, 19:20 UTCJul 11, 19:40 UTC20m
2026-07-11 N9323Z - Jul 11, 18:15 UTCJul 11, 18:25 UTC10m
2026-07-10 N9323Z - Jul 10, 21:45 UTCJul 10, 22:05 UTC20m
2026-07-10 N9323Z - Jul 10, 20:55 UTCJul 10, 21:15 UTC20m
2026-07-10 N9323Z - Jul 10, 19:50 UTCJul 10, 20:15 UTC25m
2026-07-10 N9323Z - Jul 10, 16:30 UTCJul 10, 16:40 UTC10m
2026-07-10 N9323Z - Jul 10, 15:30 UTCJul 10, 15:50 UTC20m
2026-07-09 N9323Z - Jul 9, 23:40 UTCJul 10, 00:00 UTC20m
2026-07-06 N9323Z - Jul 6, 12:35 UTCJul 6, 13:45 UTC1h 10m
2026-07-05 N9323Z - Jul 5, 14:55 UTCJul 5, 15:10 UTC15m
2026-07-05 N9323Z - Jul 5, 14:00 UTCJul 5, 14:20 UTC20m
2026-07-05 N9323Z - Jul 5, 13:05 UTCJul 5, 13:30 UTC25m
2026-07-04 N9323Z - Jul 4, 18:35 UTCJul 4, 18:55 UTC20m
2026-07-04 N9323Z - Jul 4, 17:30 UTCJul 4, 17:50 UTC20m
2026-07-04 N9323Z - Jul 4, 16:15 UTCJul 4, 16:50 UTC35m
2026-07-04 N9323Z ERI → ERI Jul 4, 15:15 UTCJul 4, 15:40 UTC25m
2026-07-04 N9323Z - Jul 4, 13:20 UTCJul 4, 13:40 UTC20m
2026-07-03 N9323Z - Jul 3, 20:50 UTCJul 3, 21:10 UTC20m
2026-07-03 N9323Z - Jul 3, 16:05 UTCJul 3, 16:25 UTC20m
2026-07-03 N9323Z - Jul 3, 15:05 UTCJul 3, 15:25 UTC20m
2026-07-03 N9323Z - Jul 3, 14:10 UTCJul 3, 14:30 UTC20m
2026-07-03 N9323Z - Jul 3, 13:10 UTCJul 3, 13:30 UTC20m
2026-06-29 N9323Z - Jun 29, 13:09 UTCJun 29, 13:49 UTC40m
2026-06-28 N9323Z CAK → CAK Jun 28, 23:14 UTCJun 28, 23:34 UTC20m
2026-06-28 N9323Z - Jun 28, 21:55 UTCJun 28, 22:15 UTC20m
2026-06-28 N9323Z CAK → CAK Jun 28, 20:45 UTCJun 28, 21:10 UTC25m
2026-06-28 N9323Z - Jun 28, 19:40 UTCJun 28, 20:34 UTC55m
2026-06-28 N9323Z CAK → CAK Jun 28, 18:34 UTCJun 28, 18:55 UTC20m
2026-06-26 N9323Z CAK → CAK Jun 26, 20:00 UTCJun 26, 20:24 UTC25m
2026-06-26 N9323Z - Jun 26, 18:49 UTCJun 26, 19:14 UTC25m
2026-06-26 N9323Z - Jun 26, 17:40 UTCJun 26, 18:04 UTC25m
2026-06-26 N9323Z - Jun 26, 16:24 UTCJun 26, 16:44 UTC20m
2026-06-26 N9323Z - Jun 26, 15:15 UTCJun 26, 15:34 UTC20m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N9323Z page for operator, model, and routing details .

Mode-S ACEFF0 frequently asked

What is Mode-S code ACEFF0?
ACEFF0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N9323Z.
Where is Mode-S ACEFF0 registered?
Mode-S code ACEFF0 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is ACEFF0 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACEFF0, octal 53167760, decimal 11,333,616.
What flights does ACEFF0 operate?
Mode-S ACEFF0 has broadcast 1 distinct callsign, including N9323Z.