sensors Mode-S transponder

AE571B

ICAO 24-bit transponder address

Currently assigned to 10-00258 · BEECH 200 Super King Air

Hex
AE571B
Octal
53453433
Decimal
11,425,563
Tail
10-00258
Type
BE20
No current signal · last broadcast 1d ago
Flights observed
5
Distinct callsigns
2
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AE571B.

Callsign history 2 distinct

Callsign Airline Flights Last seen
PAT421 - 4 2026-04-13
WING12 - 1 2026-04-12

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-04-13 PAT421 - Apr 13, 19:50 UTCApr 13, 20:25 UTC35m
2026-04-13 PAT421 - Apr 13, 17:25 UTCApr 13, 20:10 UTC2h 45m
2026-04-13 PAT421 - Apr 13, 15:50 UTCApr 13, 16:15 UTC25m
2026-04-13 PAT421 - Apr 13, 12:55 UTCApr 13, 16:15 UTC3h 20m
2026-04-12 WING12 - Apr 12, 17:15 UTCApr 12, 19:00 UTC1h 45m

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 10-00258 page for operator, model, and routing details .

Mode-S AE571B frequently asked

What is Mode-S code AE571B?
AE571B is an ICAO 24-bit transponder address. Assigned to 10-00258.
Is AE571B 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 AE571B, octal 53453433, decimal 11,425,563.
What flights does AE571B operate?
Mode-S AE571B has broadcast 2 distinct callsigns, including PAT421, WING12.