Apparatus

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sensors Mode-S transponder

440A84

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-GCL · CESSNA 525C Citation CJ4

Hex
440A84
Octal
21005204
Decimal
4,459,140
Country
AT
Tail
OE-GCL
Type
C25C
No current signal · last broadcast 20h ago
Flights observed
116
Distinct callsigns
1
Country
AT
Last broadcast
20h ago

Last known position

Most recent position reported by Mode-S 440A84.

Country allocation

The ICAO 24-bit address 440A84 falls within the block assigned to Austria (AT) by ICAO Annex 10, Volume III. Every aircraft registered in Austria receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 1 distinct

Callsign Airline Flights Last seen
AOJ4CL - 116 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 AOJ4CL - Jul 13, 09:15 UTCJul 13, 10:40 UTC1h 25m
2026-07-13 AOJ4CL LIN → TLN Jul 13, 07:30 UTCJul 13, 08:15 UTC45m
2026-07-13 AOJ4CL - Jul 13, 05:40 UTCJul 13, 06:01 UTC20m
2026-07-12 AOJ4CL - Jul 12, 12:25 UTCJul 12, 12:55 UTC30m
2026-07-12 AOJ4CL - Jul 12, 10:25 UTCJul 12, 11:25 UTC1h 0m
2026-07-12 AOJ4CL - Jul 12, 07:35 UTCJul 12, 09:00 UTC1h 25m
2026-07-10 AOJ4CL - Jul 10, 15:30 UTCJul 10, 16:15 UTC45m
2026-07-10 AOJ4CL - Jul 10, 06:00 UTCJul 10, 06:45 UTC45m
2026-07-09 AOJ4CL - Jul 9, 14:55 UTCJul 9, 15:40 UTC45m
2026-07-09 AOJ4CL - Jul 9, 06:10 UTCJul 9, 06:55 UTC45m
2026-07-07 AOJ4CL - Jul 7, 15:35 UTCJul 7, 17:05 UTC1h 30m
2026-07-06 AOJ4CL - Jul 6, 06:00 UTCJul 6, 07:25 UTC1h 25m
2026-07-04 AOJ4CL - Jul 4, 06:15 UTCJul 4, 08:10 UTC1h 55m
2026-07-03 AOJ4CL - Jul 3, 14:55 UTCJul 3, 16:00 UTC1h 5m
2026-07-03 AOJ4CL - Jul 3, 12:20 UTCJul 3, 13:55 UTC1h 35m
2026-07-03 AOJ4CL - Jul 3, 09:00 UTCJul 3, 09:20 UTC20m
2026-07-03 AOJ4CL - Jul 3, 05:50 UTCJul 3, 07:25 UTC1h 35m
2026-07-01 AOJ4CL - Jul 1, 15:00 UTCJul 1, 15:55 UTC55m
2026-07-01 AOJ4CL - Jul 1, 06:15 UTCJul 1, 06:55 UTC40m
2026-06-30 AOJ4CL - Jun 30, 13:05 UTCJun 30, 13:40 UTC35m
2026-06-30 AOJ4CL - Jun 30, 11:15 UTCJun 30, 12:10 UTC55m
2026-06-30 AOJ4CL - Jun 30, 09:30 UTCJun 30, 09:55 UTC25m
2026-06-29 AOJ4CL - Jun 29, 15:09 UTCJun 29, 15:49 UTC40m
2026-06-29 AOJ4CL - Jun 29, 05:54 UTCJun 29, 06:40 UTC45m
2026-06-28 AOJ4CL - Jun 28, 11:59 UTCJun 28, 13:55 UTC1h 55m
2026-06-28 AOJ4CL POZ → ATH Jun 28, 08:09 UTCJun 28, 10:35 UTC2h 25m
2026-06-27 AOJ4CL - Jun 27, 12:04 UTCJun 27, 13:35 UTC1h 30m
2026-06-27 AOJ4CL - Jun 27, 09:40 UTCJun 27, 10:45 UTC1h 5m
2026-06-26 AOJ4CL - Jun 26, 14:55 UTCJun 26, 15:29 UTC35m
2026-06-26 AOJ4CL - Jun 26, 12:39 UTCJun 26, 13:19 UTC40m
2026-06-26 AOJ4CL - Jun 26, 09:24 UTCJun 26, 09:55 UTC30m
2026-06-25 AOJ4CL - Jun 25, 10:50 UTCJun 25, 11:15 UTC25m
2026-06-25 AOJ4CL - Jun 25, 09:05 UTCJun 25, 10:15 UTC1h 10m
2026-06-23 AOJ4CL - Jun 23, 07:49 UTCJun 23, 09:09 UTC1h 20m
2026-06-23 AOJ4CL - Jun 23, 06:19 UTCJun 23, 06:49 UTC30m
2026-06-21 AOJ4CL - Jun 21, 16:49 UTCJun 21, 16:59 UTC10m
2026-06-21 AOJ4CL - Jun 21, 14:19 UTCJun 21, 15:49 UTC1h 30m
2026-06-19 AOJ4CL - Jun 19, 15:44 UTCJun 19, 16:49 UTC1h 5m
2026-06-19 AOJ4CL - Jun 19, 13:29 UTCJun 19, 14:44 UTC1h 15m
2026-06-18 AOJ4CL CEQ → VCE Jun 18, 14:15 UTCJun 18, 15:05 UTC50m
2026-06-18 AOJ4CL - Jun 18, 09:10 UTCJun 18, 10:30 UTC1h 20m
2026-06-17 AOJ4CL - Jun 17, 13:45 UTCJun 17, 14:30 UTC45m
2026-06-17 AOJ4CL - Jun 17, 09:55 UTCJun 17, 11:05 UTC1h 10m
2026-06-17 AOJ4CL - Jun 17, 07:25 UTCJun 17, 08:25 UTC1h 0m
2026-06-17 AOJ4CL - Jun 17, 05:45 UTCJun 17, 06:20 UTC35m
2026-06-12 AOJ4CL - Jun 12, 15:00 UTCJun 12, 15:45 UTC45m
2026-06-12 AOJ4CL - Jun 12, 06:05 UTCJun 12, 06:45 UTC40m
2026-06-11 AOJ4CL - Jun 11, 17:05 UTCJun 11, 18:25 UTC1h 20m
2026-06-10 AOJ4CL - Jun 10, 06:15 UTCJun 10, 07:50 UTC1h 35m
2026-06-09 AOJ4CL - Jun 9, 13:40 UTCJun 9, 14:35 UTC55m

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 OE-GCL page for operator, model, and routing details .

Mode-S 440A84 frequently asked

What is Mode-S code 440A84?
440A84 is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-GCL.
Where is Mode-S 440A84 registered?
Mode-S code 440A84 is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 440A84 broadcasting right now?
No active broadcast right now. Last signal was 20h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 440A84, octal 21005204, decimal 4,459,140.
What flights does 440A84 operate?
Mode-S 440A84 has broadcast 1 distinct callsign, including AOJ4CL.