sensors Mode-S transponder

AE01D3

ICAO 24-bit transponder address

Currently assigned to 62-4129 · Boeing TC-135W

Hex
AE01D3
Octal
53400723
Decimal
11,403,731
Tail
62-4129
Type
R135
No current signal · last broadcast 1d ago
Flights observed
6
Distinct callsigns
2
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AE01D3.

Callsign history 2 distinct

Callsign Airline Flights Last seen
SNOOP29 - 3 2026-04-13
COBRA29 - 3 2026-04-13

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-13 SNOOP29 - Apr 13, 21:50 UTCApr 13, 23:35 UTC1h 45m
2026-04-13 SNOOP29 - Apr 13, 19:50 UTCApr 13, 20:50 UTC1h 0m
2026-04-13 SNOOP29 - Apr 13, 19:40 UTCApr 13, 20:10 UTC30m
2026-04-13 COBRA29 - Apr 13, 17:15 UTCApr 13, 18:10 UTC55m
2026-04-13 COBRA29 - Apr 13, 16:15 UTCApr 13, 16:35 UTC20m
2026-04-13 COBRA29 - Apr 13, 15:45 UTCApr 13, 16:15 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 62-4129 page for operator, model, and routing details .

Mode-S AE01D3 frequently asked

What is Mode-S code AE01D3?
AE01D3 is an ICAO 24-bit transponder address. Assigned to 62-4129.
Is AE01D3 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 AE01D3, octal 53400723, decimal 11,403,731.
What flights does AE01D3 operate?
Mode-S AE01D3 has broadcast 2 distinct callsigns, including SNOOP29, COBRA29.