Apparatus

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sensors Mode-S transponder

AF4F5F

ICAO 24-bit transponder address

Hex
AF4F5F
Octal
53647537
Decimal
11,489,119
No current signal · last broadcast 6h ago
Flights observed
13
Distinct callsigns
2
Country
-
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S AF4F5F.

Callsign history 2 distinct

Callsign Airline Flights Last seen
C6068 - 10 2026-06-18
6068 - 3 2026-06-11

Recent flights last 13

DateFlightRouteTakeoffLandingDuration
2026-06-18 C6068 - Jun 18, 02:15 UTCJun 18, 02:30 UTC15m
2026-06-17 C6068 - Jun 17, 23:45 UTCJun 18, 00:25 UTC40m
2026-06-17 C6068 ECG → ECG Jun 17, 21:30 UTCJun 17, 22:25 UTC55m
2026-06-16 C6068 - Jun 16, 22:10 UTCJun 16, 23:05 UTC55m
2026-06-16 C6068 - Jun 16, 20:20 UTCJun 16, 21:30 UTC1h 10m
2026-06-16 C6068 - Jun 16, 18:39 UTCJun 16, 19:35 UTC55m
2026-06-16 C6068 ECG → ECG Jun 16, 14:30 UTCJun 16, 17:24 UTC2h 55m
2026-06-16 C6068 - Jun 16, 12:20 UTCJun 16, 13:34 UTC1h 15m
2026-06-12 C6068 ECG → ECG Jun 12, 12:20 UTCJun 12, 13:35 UTC1h 15m
2026-06-11 C6068 - Jun 11, 23:45 UTCJun 12, 02:30 UTC2h 46m
2026-06-11 6068 - Jun 11, 20:50 UTCJun 11, 21:10 UTC20m
2026-06-11 6068 ECG → ECG Jun 11, 17:05 UTCJun 11, 19:00 UTC1h 55m
2026-06-11 6068 - Jun 11, 16:10 UTCJun 11, 16:25 UTC15m

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.

Mode-S AF4F5F frequently asked

What is Mode-S code AF4F5F?
AF4F5F is an ICAO 24-bit transponder address.
Is AF4F5F broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AF4F5F, octal 53647537, decimal 11,489,119.
What flights does AF4F5F operate?
Mode-S AF4F5F has broadcast 2 distinct callsigns, including C6068, 6068.