Apparatus

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sensors Mode-S transponder

ACFF5C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N93673 · CESSNA 172 Skyhawk · operated by FLIGHT TRAINER LLC

Hex
ACFF5C
Octal
53177534
Decimal
11,337,564
Country
US
Tail
N93673
Type
C172
No current signal · last broadcast 1d ago
Flights observed
146
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S ACFF5C.

Country allocation

The ICAO 24-bit address ACFF5C 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
CXK579 - 146 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 CXK579 SMF → SAC Jul 16, 04:40 UTCJul 16, 06:05 UTC1h 25m
2026-07-16 CXK579 SAC → SMF Jul 16, 04:20 UTCJul 16, 04:35 UTC15m
2026-07-16 CXK579 SAC → SAC Jul 16, 02:05 UTCJul 16, 03:10 UTC1h 5m
2026-07-15 CXK579 SAC → SAC Jul 15, 23:15 UTCJul 16, 00:55 UTC1h 40m
2026-07-15 CXK579 SAC → SAC Jul 15, 20:25 UTCJul 15, 22:00 UTC1h 35m
2026-07-15 CXK579 SAC → SAC Jul 15, 16:45 UTCJul 15, 18:35 UTC1h 50m
2026-07-15 CXK579 SAC → SAC Jul 15, 12:40 UTCJul 15, 14:40 UTC2h 0m
2026-07-13 CXK579 - Jul 13, 17:25 UTCJul 13, 19:00 UTC1h 35m
2026-07-13 CXK579 - Jul 13, 14:10 UTCJul 13, 15:25 UTC1h 15m
2026-07-12 CXK579 SAC → SAC Jul 12, 18:10 UTCJul 12, 20:10 UTC2h 0m
2026-07-12 CXK579 SAC → SAC Jul 12, 04:25 UTCJul 12, 06:20 UTC1h 55m
2026-07-12 CXK579 SAC → SAC Jul 12, 01:45 UTCJul 12, 02:15 UTC30m
2026-07-11 CXK579 SAC → SAC Jul 11, 18:20 UTCJul 11, 19:55 UTC1h 35m
2026-07-11 CXK579 SAC → SAC Jul 11, 15:05 UTCJul 11, 16:50 UTC1h 45m
2026-07-10 CXK579 - Jul 10, 20:25 UTCJul 10, 20:40 UTC15m
2026-07-10 CXK579 - Jul 10, 18:55 UTCJul 10, 19:45 UTC50m
2026-07-10 CXK579 - Jul 10, 16:45 UTCJul 10, 17:05 UTC20m
2026-07-09 CXK579 SAC → SAC Jul 9, 21:15 UTCJul 9, 23:15 UTC2h 0m
2026-07-09 CXK579 SAC → SAC Jul 9, 13:35 UTCJul 9, 14:40 UTC1h 5m
2026-07-08 CXK579 SAC → SAC Jul 8, 19:35 UTCJul 8, 20:10 UTC35m
2026-07-08 CXK579 SAC → SAC Jul 8, 14:55 UTCJul 8, 16:55 UTC2h 0m
2026-07-07 CXK579 SAC → SAC Jul 7, 23:00 UTCJul 8, 00:25 UTC1h 25m
2026-07-07 CXK579 - Jul 7, 21:30 UTCJul 7, 21:45 UTC15m
2026-07-07 CXK579 - Jul 7, 15:50 UTCJul 7, 16:05 UTC15m
2026-07-07 CXK579 MCE → SAC Jul 7, 05:05 UTCJul 7, 06:00 UTC55m
2026-07-07 CXK579 - Jul 7, 01:20 UTCJul 7, 02:50 UTC1h 30m
2026-07-06 CXK579 SAC → SAC Jul 6, 20:35 UTCJul 6, 22:20 UTC1h 45m
2026-07-06 CXK579 SAC → SAC Jul 6, 16:15 UTCJul 6, 16:50 UTC35m
2026-07-06 CXK579 SAC → SAC Jul 6, 15:50 UTCJul 6, 16:10 UTC20m
2026-07-04 CXK579 SAC → SAC Jul 4, 02:00 UTCJul 4, 03:15 UTC1h 15m
2026-07-03 CXK579 SAC → SAC Jul 3, 21:45 UTCJul 3, 22:20 UTC35m
2026-07-02 CXK579 SAC → SAC Jul 2, 23:15 UTCJul 3, 00:55 UTC1h 40m
2026-07-02 CXK579 SAC → SAC Jul 2, 18:10 UTCJul 2, 20:00 UTC1h 50m
2026-07-02 CXK579 - Jul 2, 15:55 UTCJul 2, 16:55 UTC1h 0m
2026-07-02 CXK579 - Jul 2, 14:40 UTCJul 2, 15:50 UTC1h 10m
2026-07-01 CXK579 SAC → SAC Jul 1, 18:10 UTCJul 1, 19:40 UTC1h 30m
2026-07-01 CXK579 SAC → SAC Jul 1, 15:55 UTCJul 1, 17:35 UTC1h 40m
2026-07-01 CXK579 - Jul 1, 15:05 UTCJul 1, 15:15 UTC10m
2026-07-01 CXK579 SAC → MCC Jul 1, 13:50 UTCJul 1, 15:00 UTC1h 10m
2026-07-01 CXK579 SAC → SAC Jul 1, 00:05 UTCJul 1, 01:30 UTC1h 25m
2026-06-30 CXK579 SAC → SAC Jun 30, 20:40 UTCJun 30, 22:40 UTC2h 0m
2026-06-30 CXK579 - Jun 30, 19:05 UTCJun 30, 19:50 UTC45m
2026-06-30 CXK579 - Jun 30, 17:35 UTCJun 30, 18:50 UTC1h 15m
2026-06-29 CXK579 SAC → SAC Jun 29, 12:14 UTCJun 29, 14:04 UTC1h 50m
2026-06-28 CXK579 SAC → SAC Jun 28, 21:24 UTCJun 28, 22:45 UTC1h 20m
2026-06-28 CXK579 SAC → SAC Jun 28, 17:19 UTCJun 28, 17:55 UTC35m
2026-06-28 CXK579 - Jun 28, 03:35 UTCJun 28, 04:05 UTC30m
2026-06-28 CXK579 - Jun 28, 02:20 UTCJun 28, 03:29 UTC1h 10m
2026-06-27 CXK579 SAC → SAC Jun 27, 16:35 UTCJun 27, 17:55 UTC1h 20m
2026-06-25 CXK579 SAC → SAC Jun 25, 15:29 UTCJun 25, 17:25 UTC1h 55m

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 N93673 page for operator, model, and routing details .

Mode-S ACFF5C frequently asked

What is Mode-S code ACFF5C?
ACFF5C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N93673.
Where is Mode-S ACFF5C registered?
Mode-S code ACFF5C 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 ACFF5C 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 ACFF5C, octal 53177534, decimal 11,337,564.
What flights does ACFF5C operate?
Mode-S ACFF5C has broadcast 1 distinct callsign, including CXK579.