Apparatus

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sensors Mode-S transponder

AE4E9D

ICAO 24-bit transponder address

Currently assigned to 166179 · Raytheon T-6B Texan II

Hex
AE4E9D
Octal
53447235
Decimal
11,423,389
Tail
166179
Type
TEX2
No current signal · last broadcast 23m ago
Flights observed
11
Distinct callsigns
4
Country
-
Last broadcast
23m ago

Last known position

Most recent position reported by Mode-S AE4E9D.

Callsign history 4 distinct

Callsign Airline Flights Last seen
RN179 - 5 2026-04-16
SH179 - 4 2026-04-18
SH179Z - 1 2026-04-17
BB179Z - 1 2026-04-16

Recent flights last 11

DateFlightRouteTakeoffLandingDuration
2026-04-18 SH179 - Apr 18, 16:00 UTCApr 18, 17:10 UTC1h 10m
2026-04-17 SH179 - Apr 17, 22:05 UTCApr 17, 22:15 UTC10m
2026-04-17 SH179 - Apr 17, 18:35 UTCApr 17, 19:15 UTC40m
2026-04-17 SH179Z - Apr 17, 14:50 UTCApr 17, 15:10 UTC19m
2026-04-16 BB179Z - Apr 16, 18:45 UTCApr 16, 19:05 UTC20m
2026-04-16 RN179 - Apr 16, 01:10 UTCApr 16, 01:25 UTC15m
2026-04-16 RN179 - Apr 16, 00:10 UTCApr 16, 01:05 UTC55m
2026-04-15 RN179 - Apr 15, 21:20 UTCApr 15, 22:30 UTC1h 10m
2026-04-15 RN179 - Apr 15, 13:01 UTCApr 15, 13:50 UTC50m
2026-04-14 RN179 - Apr 14, 14:05 UTCApr 14, 14:40 UTC35m
2026-04-13 SH179 - Apr 13, 21:40 UTCApr 13, 23:00 UTC1h 20m

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 166179 page for operator, model, and routing details .

Mode-S AE4E9D frequently asked

What is Mode-S code AE4E9D?
AE4E9D is an ICAO 24-bit transponder address. Assigned to 166179.
Is AE4E9D broadcasting right now?
No active broadcast right now. Last signal was 23m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE4E9D, octal 53447235, decimal 11,423,389.
What flights does AE4E9D operate?
Mode-S AE4E9D has broadcast 4 distinct callsigns, including RN179, SH179, SH179Z, BB179Z.