sensors Mode-S transponder

AE73E4

ICAO 24-bit transponder address

Currently assigned to 170185 · AGUSTA AW-119 Koala

Hex
AE73E4
Octal
53471744
Decimal
11,432,932
Tail
170185
Type
A119
No current signal · last broadcast 23h ago
Flights observed
5
Distinct callsigns
1
Country
-
Last broadcast
23h ago

Last known position

Most recent position reported by Mode-S AE73E4.

Callsign history 1 distinct

Callsign Airline Flights Last seen
EB703 - 5 2026-04-13

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-04-13 EB703 - Apr 13, 22:50 UTCApr 13, 23:45 UTC55m
2026-04-13 EB703 - Apr 13, 21:05 UTCApr 13, 21:45 UTC40m
2026-04-13 EB703 - Apr 13, 19:50 UTCApr 13, 20:05 UTC15m
2026-04-13 EB703 - Apr 13, 19:35 UTCApr 13, 20:05 UTC30m
2026-04-13 EB703 - Apr 13, 17:50 UTCApr 13, 18:15 UTC25m

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 170185 page for operator, model, and routing details .

Mode-S AE73E4 frequently asked

What is Mode-S code AE73E4?
AE73E4 is an ICAO 24-bit transponder address. Assigned to 170185.
Is AE73E4 broadcasting right now?
No active broadcast right now. Last signal was 23h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE73E4, octal 53471744, decimal 11,432,932.
What flights does AE73E4 operate?
Mode-S AE73E4 has broadcast 1 distinct callsign, including EB703.