Apparatus

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sensors Mode-S transponder

A9E899

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N73784 · CESSNA 172 Skyhawk · operated by DSR CHEROKEE 180 LLC

Hex
A9E899
Octal
52364231
Decimal
11,135,129
Country
US
Tail
N73784
Type
C172
No current signal · last broadcast 4h ago
Flights observed
174
Distinct callsigns
1
Country
US
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S A9E899.

Country allocation

The ICAO 24-bit address A9E899 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
N73784 - 174 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 N73784 - Jul 18, 13:10 UTCJul 18, 13:30 UTC20m
2026-07-18 N73784 - Jul 18, 11:30 UTCJul 18, 12:30 UTC1h 0m
2026-07-17 N73784 - Jul 17, 21:44 UTCJul 17, 23:39 UTC1h 55m
2026-07-17 N73784 - Jul 17, 18:50 UTCJul 17, 19:30 UTC40m
2026-07-16 N73784 - Jul 16, 16:49 UTCJul 16, 18:05 UTC1h 15m
2026-07-16 N73784 - Jul 16, 02:30 UTCJul 16, 05:20 UTC2h 50m
2026-07-15 N73784 - Jul 15, 16:30 UTCJul 15, 16:45 UTC15m
2026-07-15 N73784 - Jul 15, 15:25 UTCJul 15, 15:50 UTC25m
2026-07-14 N73784 - Jul 14, 22:25 UTCJul 15, 00:00 UTC1h 34m
2026-07-14 N73784 - Jul 14, 18:25 UTCJul 14, 20:35 UTC2h 10m
2026-07-14 N73784 - Jul 14, 12:05 UTCJul 14, 12:10 UTC5m
2026-07-12 N73784 - Jul 12, 11:35 UTCJul 12, 13:30 UTC1h 55m
2026-07-11 N73784 - Jul 11, 19:35 UTCJul 11, 19:40 UTC5m
2026-07-11 N73784 - Jul 11, 19:20 UTCJul 11, 19:25 UTC5m
2026-07-11 N73784 - Jul 11, 18:55 UTCJul 11, 19:10 UTC15m
2026-07-11 N73784 - Jul 11, 16:25 UTCJul 11, 16:45 UTC20m
2026-07-11 N73784 - Jul 11, 14:40 UTCJul 11, 15:35 UTC55m
2026-07-11 N73784 - Jul 11, 13:20 UTCJul 11, 14:00 UTC40m
2026-07-11 N73784 - Jul 11, 00:30 UTCJul 11, 00:50 UTC20m
2026-07-10 N73784 - Jul 10, 22:30 UTCJul 10, 23:40 UTC1h 10m
2026-06-29 N73784 - Jun 29, 19:00 UTCJun 29, 20:35 UTC1h 35m
2026-06-29 N73784 - Jun 29, 15:04 UTCJun 29, 17:14 UTC2h 10m
2026-06-28 N73784 - Jun 28, 22:29 UTCJun 29, 00:34 UTC2h 5m
2026-06-26 N73784 - Jun 26, 14:55 UTCJun 26, 17:00 UTC2h 5m
2026-06-25 N73784 - Jun 25, 18:24 UTCJun 25, 19:49 UTC1h 25m
2026-06-25 N73784 - Jun 25, 14:39 UTCJun 25, 15:59 UTC1h 20m
2026-06-24 N73784 - Jun 24, 15:00 UTCJun 24, 15:29 UTC30m
2026-06-24 N73784 - Jun 24, 00:20 UTCJun 24, 00:44 UTC25m
2026-06-23 N73784 - Jun 23, 21:14 UTCJun 23, 21:34 UTC20m
2026-06-22 N73784 - Jun 22, 23:50 UTCJun 23, 00:09 UTC20m
2026-06-17 N73784 - Jun 17, 23:20 UTCJun 18, 00:25 UTC1h 5m
2026-06-17 N73784 - Jun 17, 18:50 UTCJun 17, 19:25 UTC35m
2026-06-17 N73784 - Jun 17, 11:30 UTCJun 17, 11:35 UTC5m
2026-06-17 N73784 - Jun 17, 00:15 UTCJun 17, 01:45 UTC1h 30m
2026-06-16 N73784 - Jun 16, 21:20 UTCJun 16, 22:35 UTC1h 15m
2026-06-16 N73784 - Jun 16, 19:10 UTCJun 16, 20:20 UTC1h 11m
2026-06-15 N73784 - Jun 15, 21:40 UTCJun 15, 23:54 UTC2h 15m
2026-06-15 N73784 - Jun 15, 18:10 UTCJun 15, 18:50 UTC40m
2026-06-15 N73784 - Jun 15, 16:19 UTCJun 15, 17:20 UTC1h 0m
2026-06-15 N73784 - Jun 15, 14:50 UTCJun 15, 15:40 UTC50m
2026-06-14 N73784 - Jun 14, 22:00 UTCJun 14, 23:20 UTC1h 19m
2026-06-14 N73784 - Jun 14, 21:40 UTCJun 14, 21:55 UTC15m
2026-06-14 N73784 - Jun 14, 18:55 UTCJun 14, 20:30 UTC1h 35m
2026-06-13 N73784 - Jun 13, 20:35 UTCJun 13, 20:55 UTC20m
2026-06-13 N73784 - Jun 13, 19:05 UTCJun 13, 20:00 UTC55m
2026-06-13 N73784 - Jun 13, 11:30 UTCJun 13, 12:50 UTC1h 20m
2026-06-12 N73784 - Jun 12, 21:30 UTCJun 12, 23:25 UTC1h 55m
2026-06-11 N73784 - Jun 11, 14:50 UTCJun 11, 15:15 UTC25m
2026-06-10 N73784 - Jun 10, 21:55 UTCJun 11, 00:05 UTC2h 10m
2026-06-10 N73784 - Jun 10, 19:00 UTCJun 10, 21:00 UTC2h 0m

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 N73784 page for operator, model, and routing details .

Mode-S A9E899 frequently asked

What is Mode-S code A9E899?
A9E899 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N73784.
Where is Mode-S A9E899 registered?
Mode-S code A9E899 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 A9E899 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9E899, octal 52364231, decimal 11,135,129.
What flights does A9E899 operate?
Mode-S A9E899 has broadcast 1 distinct callsign, including N73784.