Apparatus

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sensors Mode-S transponder

A4C684

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4069F · CESSNA 172 Skyhawk · operated by DMAC AIRCRAFT LLC

Hex
A4C684
Octal
51143204
Decimal
10,798,724
Country
US
Tail
N4069F
Type
C172
No current signal · last broadcast 19h ago
Flights observed
51
Distinct callsigns
1
Country
US
Last broadcast
19h ago

Last known position

Most recent position reported by Mode-S A4C684.

Country allocation

The ICAO 24-bit address A4C684 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
N4069F - 51 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 N4069F SAV → SAV Jul 17, 15:20 UTCJul 17, 16:29 UTC1h 10m
2026-07-12 N4069F - Jul 12, 16:15 UTCJul 12, 16:35 UTC20m
2026-07-12 N4069F - Jul 12, 14:45 UTCJul 12, 15:10 UTC25m
2026-07-08 N4069F - Jul 8, 13:30 UTCJul 8, 13:45 UTC15m
2026-07-08 N4069F - Jul 8, 12:30 UTCJul 8, 13:00 UTC30m
2026-07-07 N4069F - Jul 7, 19:00 UTCJul 7, 19:20 UTC20m
2026-07-07 N4069F - Jul 7, 17:55 UTCJul 7, 18:10 UTC15m
2026-07-07 N4069F - Jul 7, 13:30 UTCJul 7, 13:50 UTC20m
2026-07-07 N4069F - Jul 7, 12:20 UTCJul 7, 12:40 UTC20m
2026-07-05 N4069F - Jul 5, 16:20 UTCJul 5, 16:30 UTC10m
2026-07-05 N4069F - Jul 5, 15:10 UTCJul 5, 15:30 UTC20m
2026-07-02 N4069F - Jul 2, 16:55 UTCJul 2, 17:10 UTC15m
2026-07-02 N4069F SAV → SAV Jul 2, 14:35 UTCJul 2, 15:15 UTC40m
2026-07-01 N4069F - Jul 1, 18:45 UTCJul 1, 19:10 UTC25m
2026-07-01 N4069F - Jul 1, 17:35 UTCJul 1, 18:10 UTC35m
2026-06-27 N4069F - Jun 27, 15:55 UTCJun 27, 17:04 UTC1h 10m
2026-06-27 N4069F - Jun 27, 13:00 UTCJun 27, 13:49 UTC50m
2026-06-26 N4069F - Jun 26, 13:24 UTCJun 26, 13:40 UTC15m
2026-06-26 N4069F - Jun 26, 12:14 UTCJun 26, 12:29 UTC15m
2026-06-25 N4069F - Jun 25, 18:19 UTCJun 25, 18:29 UTC10m
2026-06-25 N4069F - Jun 25, 17:05 UTCJun 25, 17:20 UTC15m
2026-06-25 N4069F - Jun 25, 14:09 UTCJun 25, 14:24 UTC15m
2026-06-14 N4069F - Jun 14, 16:10 UTCJun 14, 16:30 UTC20m
2026-06-14 N4069F - Jun 14, 14:45 UTCJun 14, 15:20 UTC35m
2026-06-13 N4069F SAV → SAV Jun 13, 12:15 UTCJun 13, 14:05 UTC1h 50m
2026-06-12 N4069F SAV → SAV Jun 12, 15:45 UTCJun 12, 17:00 UTC1h 15m
2026-06-12 N4069F - Jun 12, 00:10 UTCJun 12, 02:15 UTC2h 6m
2026-06-11 N4069F - Jun 11, 21:50 UTCJun 11, 23:30 UTC1h 40m
2026-06-11 N4069F - Jun 11, 18:30 UTCJun 11, 18:45 UTC15m
2026-06-11 N4069F - Jun 11, 16:50 UTCJun 11, 17:15 UTC25m
2026-06-11 N4069F SAV → SAV Jun 11, 14:10 UTCJun 11, 15:15 UTC1h 5m
2026-06-10 N4069F SAV → SAV Jun 10, 12:15 UTCJun 10, 13:35 UTC1h 20m
2026-06-09 N4069F SAV → SAV Jun 9, 12:10 UTCJun 9, 13:45 UTC1h 35m
2026-06-08 N4069F SAV → SAV Jun 8, 23:40 UTCJun 9, 00:30 UTC50m
2026-06-08 N4069F SAV → SAV Jun 8, 16:50 UTCJun 8, 18:15 UTC1h 25m
2026-06-06 N4069F SAV → SAV Jun 6, 12:24 UTCJun 6, 14:04 UTC1h 40m
2026-06-04 N4069F SAV → SAV Jun 4, 18:50 UTCJun 4, 19:25 UTC35m
2026-06-04 N4069F - Jun 4, 15:15 UTCJun 4, 15:35 UTC20m
2026-06-04 N4069F - Jun 4, 14:10 UTCJun 4, 14:35 UTC25m
2026-06-03 N4069F SAV → SAV Jun 3, 17:40 UTCJun 3, 18:15 UTC35m
2026-05-28 N4069F SAV → SAV May 28, 11:30 UTCMay 28, 13:35 UTC2h 5m
2026-05-23 N4069F SAV → SAV May 23, 10:20 UTCMay 23, 10:45 UTC25m
2026-05-21 N4069F SAV → SAV May 21, 13:50 UTCMay 21, 14:30 UTC40m
2026-05-20 N4069F SAV → SAV May 20, 17:25 UTCMay 20, 18:10 UTC45m
2026-05-19 N4069F SAV → SAV May 19, 21:50 UTCMay 19, 22:40 UTC50m
2026-05-19 N4069F - May 19, 17:30 UTCMay 19, 18:15 UTC45m
2026-05-16 N4069F SAV → SAV May 16, 15:31 UTCMay 16, 16:50 UTC1h 20m
2026-05-15 N4069F - May 15, 14:20 UTCMay 15, 14:50 UTC29m
2026-05-14 N4069F SAV → SAV May 14, 15:20 UTCMay 14, 15:55 UTC35m
2026-04-23 N4069F SAV → SAV Apr 23, 17:25 UTCApr 23, 18:10 UTC45m

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 N4069F page for operator, model, and routing details .

Mode-S A4C684 frequently asked

What is Mode-S code A4C684?
A4C684 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4069F.
Where is Mode-S A4C684 registered?
Mode-S code A4C684 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 A4C684 broadcasting right now?
No active broadcast right now. Last signal was 19h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4C684, octal 51143204, decimal 10,798,724.
What flights does A4C684 operate?
Mode-S A4C684 has broadcast 1 distinct callsign, including N4069F.