sensors Mode-S transponder

AE523B

ICAO 24-bit transponder address

Currently assigned to 07-08037 · BOEING-VERTOL CH-47 Chinook

Hex
AE523B
Octal
53451073
Decimal
11,424,315
Tail
07-08037
Type
H47
No current signal · last broadcast 15d ago
Flights observed
35
Distinct callsigns
17
Country
-
Last broadcast
15d ago

Last known position

Most recent position reported by Mode-S AE523B.

Callsign history 17 distinct

Callsign Airline Flights Last seen
GEARS75 - 8 2026-04-18
CARGO29 - 6 2026-05-15
CARGO40 - 3 2026-04-29
CARGO46 - 2 2026-04-21
CARGO39 - 2 2026-05-05
CARGO38 - 2 2026-05-01
CARGO33 - 2 2026-05-18
SUPRT86 - 1 2026-04-29
SUPRT43 - 1 2026-05-13
GUILT06 - 1 2026-05-06
GEARS79 - 1 2026-05-12
GEARS77 - 1 2026-05-11
GEARS72 - 1 2026-04-22
CARGO47 - 1 2026-04-30
CARGO35 - 1 2026-04-23
CARGO32 - 1 2026-04-24
CARGO27 - 1 2026-04-23

Recent flights last 35

DateFlightRouteTakeoffLandingDuration
2026-05-18 CARGO33 - May 18, 19:20 UTCMay 18, 20:50 UTC1h 30m
2026-05-18 CARGO33 - May 18, 15:55 UTCMay 18, 17:10 UTC1h 15m
2026-05-15 CARGO29 - May 15, 20:35 UTCMay 15, 21:10 UTC35m
2026-05-15 CARGO29 - May 15, 19:30 UTCMay 15, 20:00 UTC30m
2026-05-13 CARGO29 - May 13, 19:20 UTCMay 13, 20:50 UTC1h 30m
2026-05-13 SUPRT43 - May 13, 12:50 UTCMay 13, 13:00 UTC10m
2026-05-12 GEARS79 - May 12, 13:51 UTCMay 12, 15:25 UTC1h 35m
2026-05-11 GEARS77 - May 11, 14:05 UTCMay 11, 14:30 UTC25m
2026-05-06 GUILT06 - May 6, 19:35 UTCMay 6, 21:00 UTC1h 25m
2026-05-05 CARGO39 - May 5, 02:55 UTCMay 5, 03:55 UTC1h 0m
2026-05-05 CARGO39 - May 5, 01:10 UTCMay 5, 01:55 UTC45m
2026-05-01 CARGO38 - May 1, 03:25 UTCMay 1, 04:30 UTC1h 5m
2026-05-01 CARGO38 - May 1, 01:30 UTCMay 1, 02:45 UTC1h 15m
2026-04-30 CARGO47 - Apr 30, 13:40 UTCApr 30, 15:50 UTC2h 10m
2026-04-29 CARGO40 - Apr 29, 14:30 UTCApr 29, 16:10 UTC1h 40m
2026-04-29 SUPRT86 - Apr 29, 00:54 UTCApr 29, 01:05 UTC10m
2026-04-27 CARGO29 - Apr 27, 21:20 UTCApr 27, 21:35 UTC15m
2026-04-27 CARGO29 - Apr 27, 20:30 UTCApr 27, 20:45 UTC15m
2026-04-27 CARGO29 - Apr 27, 19:10 UTCApr 27, 19:40 UTC30m
2026-04-24 CARGO32 - Apr 24, 04:05 UTCApr 24, 04:45 UTC40m
2026-04-23 CARGO27 - Apr 23, 19:25 UTCApr 23, 19:55 UTC30m
2026-04-23 CARGO35 - Apr 23, 01:30 UTCApr 23, 04:05 UTC2h 35m
2026-04-22 GEARS72 - Apr 22, 01:35 UTCApr 22, 03:35 UTC2h 0m
2026-04-21 CARGO46 - Apr 21, 01:40 UTCApr 21, 02:10 UTC30m
2026-04-20 CARGO46 - Apr 20, 23:35 UTCApr 21, 00:10 UTC35m
2026-04-18 GEARS75 - Apr 18, 03:25 UTCApr 18, 04:10 UTC45m
2026-04-18 GEARS75 - Apr 18, 02:00 UTCApr 18, 02:10 UTC10m
2026-04-17 GEARS75 - Apr 17, 03:20 UTCApr 17, 04:30 UTC1h 10m
2026-04-17 GEARS75 - Apr 17, 01:40 UTCApr 17, 03:15 UTC1h 35m
2026-04-16 GEARS75 - Apr 16, 04:20 UTCApr 16, 04:34 UTC15m
2026-04-16 GEARS75 - Apr 16, 03:09 UTCApr 16, 03:34 UTC25m
2026-04-16 GEARS75 - Apr 16, 02:30 UTCApr 16, 02:54 UTC25m
2026-04-16 GEARS75 - Apr 16, 01:35 UTCApr 16, 01:45 UTC10m
2026-04-14 CARGO40 - Apr 14, 16:10 UTCApr 14, 16:40 UTC30m
2026-04-14 CARGO40 - Apr 14, 15:10 UTCApr 14, 15:40 UTC30m

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 07-08037 page for operator, model, and routing details .

Mode-S AE523B frequently asked

What is Mode-S code AE523B?
AE523B is an ICAO 24-bit transponder address. Assigned to 07-08037.
Is AE523B broadcasting right now?
No active broadcast right now. Last signal was 15d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE523B, octal 53451073, decimal 11,424,315.
What flights does AE523B operate?
Mode-S AE523B has broadcast 17 distinct callsigns, including GEARS75, CARGO29, CARGO40, CARGO46, CARGO39.