sensors Mode-S transponder

AF54C4

ICAO 24-bit transponder address

Currently assigned to 170747 · BEECH 200 Super King Air

Hex
AF54C4
Octal
53652304
Decimal
11,490,500
Tail
170747
Type
BE20
No current signal · last broadcast 1d ago
Flights observed
7
Distinct callsigns
2
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AF54C4.

Callsign history 2 distinct

Callsign Airline Flights Last seen
STGRY07 - 4 2026-04-13
STGRY43 - 3 2026-04-13

Recent flights last 7

DateFlightRouteTakeoffLandingDuration
2026-04-13 STGRY43 - Apr 13, 15:50 UTCApr 13, 16:05 UTC15m
2026-04-13 STGRY43 - Apr 13, 14:15 UTCApr 13, 16:05 UTC1h 50m
2026-04-13 STGRY43 - Apr 13, 13:05 UTCApr 13, 13:40 UTC35m
2026-04-13 STGRY07 - Apr 13, 00:20 UTCApr 13, 00:40 UTC20m
2026-04-12 STGRY07 - Apr 12, 23:55 UTCApr 13, 00:40 UTC45m
2026-04-12 STGRY07 - Apr 12, 19:35 UTCApr 12, 20:15 UTC40m
2026-04-12 STGRY07 - Apr 12, 17:15 UTCApr 12, 18:30 UTC1h 15m

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 170747 page for operator, model, and routing details .

Mode-S AF54C4 frequently asked

What is Mode-S code AF54C4?
AF54C4 is an ICAO 24-bit transponder address. Assigned to 170747.
Is AF54C4 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 AF54C4, octal 53652304, decimal 11,490,500.
What flights does AF54C4 operate?
Mode-S AF54C4 has broadcast 2 distinct callsigns, including STGRY07, STGRY43.