Apparatus

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sensors Mode-S transponder

AE59A9

ICAO 24-bit transponder address

Currently assigned to 13-08139 · BOEING-VERTOL CH-47 Chinook

Hex
AE59A9
Octal
53454651
Decimal
11,426,217
Tail
13-08139
Type
H47
No current signal · last broadcast 1d ago
Flights observed
21
Distinct callsigns
1
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AE59A9.

Callsign history 1 distinct

Callsign Airline Flights Last seen
R08139 - 21 2026-07-16

Recent flights last 21

DateFlightRouteTakeoffLandingDuration
2026-07-16 R08139 - Jul 16, 23:40 UTCJul 17, 00:04 UTC25m
2026-07-16 R08139 - Jul 16, 21:25 UTCJul 16, 22:40 UTC1h 15m
2026-07-16 R08139 - Jul 16, 19:05 UTCJul 16, 20:15 UTC1h 10m
2026-07-16 R08139 - Jul 16, 01:15 UTCJul 16, 01:25 UTC10m
2026-07-16 R08139 - Jul 16, 00:00 UTCJul 16, 00:40 UTC40m
2026-07-15 R08139 - Jul 15, 21:30 UTCJul 15, 23:15 UTC1h 45m
2026-07-14 R08139 - Jul 14, 22:15 UTCJul 15, 00:50 UTC2h 34m
2026-07-14 R08139 - Jul 14, 01:55 UTCJul 14, 02:30 UTC35m
2026-07-14 R08139 - Jul 14, 00:50 UTCJul 14, 01:00 UTC10m
2026-07-10 R08139 - Jul 10, 18:05 UTCJul 10, 18:30 UTC25m
2026-06-11 R08139 - Jun 11, 03:40 UTCJun 11, 05:50 UTC2h 10m
2026-06-11 R08139 - Jun 11, 02:50 UTCJun 11, 03:05 UTC15m
2026-06-11 R08139 - Jun 11, 00:05 UTCJun 11, 01:55 UTC1h 50m
2026-06-05 R08139 - Jun 5, 19:55 UTCJun 5, 21:15 UTC1h 20m
2026-05-05 R08139 - May 5, 04:50 UTCMay 5, 05:45 UTC55m
2026-05-05 R08139 - May 5, 03:15 UTCMay 5, 04:15 UTC1h 0m
2026-05-05 R08139 - May 5, 02:05 UTCMay 5, 02:45 UTC40m
2026-05-05 R08139 - May 5, 01:05 UTCMay 5, 01:20 UTC15m
2026-04-28 R08139 HOP → HOP Apr 28, 19:35 UTCApr 28, 21:40 UTC2h 5m
2026-04-21 R08139 - Apr 21, 16:01 UTCApr 21, 18:05 UTC2h 4m
2026-04-21 R08139 - Apr 21, 14:31 UTCApr 21, 14:50 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 13-08139 page for operator, model, and routing details .

Mode-S AE59A9 frequently asked

What is Mode-S code AE59A9?
AE59A9 is an ICAO 24-bit transponder address. Assigned to 13-08139.
Is AE59A9 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 AE59A9, octal 53454651, decimal 11,426,217.
What flights does AE59A9 operate?
Mode-S AE59A9 has broadcast 1 distinct callsign, including R08139.