Apparatus

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sensors Mode-S transponder

440D4D

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-IXK · BOEING 737-800

Hex
440D4D
Octal
21006515
Decimal
4,459,853
Country
AT
Tail
OE-IXK
Type
B738
Broadcasting now · callsign FDX4797 · 34,000 ft
Flights observed
128
Distinct callsigns
20
Country
AT
Last broadcast
15h ago

Current position

440D4D is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 440D4D 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 20 distinct

Callsign Airline Flights Last seen
TAY1MN - 8 2026-07-01
TAY7CA ASL Airlines Belgium 7 2026-04-17
TAY6SF - 6 2026-06-17
TAY2MN - 6 2026-07-01
TAY9VX - 5 2026-06-12
TAY9SL - 5 2026-07-08
TAY9MS ASL Airlines Belgium 5 2026-05-26
TAY8SL - 5 2026-07-08
TAY6CA ASL Airlines Belgium 5 2026-04-17
TAY5TR - 5 2026-06-14
TAY1MS - 5 2026-05-26
TAY9VL - 4 2026-07-07
TAY8VC - 4 2026-07-07
TAY8SR - 4 2026-07-02
TAY7VC - 4 2026-05-23
TAY7SR - 4 2026-07-02
TAY6IX - 4 2026-04-22
TAY5IX - 4 2026-04-22
TAY3SF - 4 2026-06-17
TAY3RQ ASL Airlines Belgium 3 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FDX4648 - Jul 14, 02:20 UTCJul 14, 05:00 UTC2h 40m
2026-07-08 TAY9SL - Jul 8, 20:55 UTCJul 8, 21:40 UTC45m
2026-07-08 TAY8SL - Jul 8, 02:35 UTCJul 8, 03:15 UTC40m
2026-07-07 TAY9VL - Jul 7, 21:10 UTCJul 7, 23:00 UTC1h 50m
2026-07-07 TAY9VL - Jul 7, 19:00 UTCJul 7, 19:45 UTC45m
2026-07-07 TAY8VC - Jul 7, 05:35 UTCJul 7, 06:20 UTC45m
2026-07-07 TAY8VC - Jul 7, 03:10 UTCJul 7, 04:15 UTC1h 5m
2026-07-06 TAY1LA - Jul 6, 20:55 UTCJul 6, 22:30 UTC1h 35m
2026-07-05 TAY4992 - Jul 5, 18:45 UTCJul 5, 20:35 UTC1h 50m
2026-07-05 TAY4992 - Jul 5, 15:25 UTCJul 5, 17:50 UTC2h 25m
2026-07-05 FDX4774 - Jul 5, 07:25 UTCJul 5, 10:45 UTC3h 20m
2026-07-04 FDX4624 CDG → SAW Jul 4, 03:40 UTCJul 4, 06:30 UTC2h 50m
2026-07-03 FDX4774 - Jul 3, 19:55 UTCJul 3, 23:20 UTC3h 25m
2026-07-03 FDX4648 - Jul 3, 02:15 UTCJul 3, 04:55 UTC2h 40m
2026-07-02 TAY8SR - Jul 2, 21:25 UTCJul 2, 22:20 UTC55m
2026-07-02 TAY8SR - Jul 2, 18:50 UTCJul 2, 20:05 UTC1h 15m
2026-07-02 TAY7SR - Jul 2, 04:30 UTCJul 2, 05:35 UTC1h 5m
2026-07-02 TAY7SR CDG → MUC Jul 2, 02:15 UTCJul 2, 03:30 UTC1h 15m
2026-07-01 TAY2MN LIS → CDG Jul 1, 19:30 UTCJul 1, 21:45 UTC2h 15m
2026-07-01 TAY2MN - Jul 1, 17:25 UTCJul 1, 18:15 UTC50m
2026-07-01 TAY1MN - Jul 1, 07:50 UTCJul 1, 08:50 UTC1h 0m
2026-07-01 TAY1MN CDG → LIS Jul 1, 04:30 UTCJul 1, 06:45 UTC2h 15m
2026-06-30 TAY4646 HAJ → CDG Jun 30, 20:55 UTCJun 30, 22:10 UTC1h 15m
2026-06-30 TAY4546 - Jun 30, 01:50 UTCJun 30, 02:30 UTC40m
2026-06-29 TAY9SL - Jun 29, 20:49 UTCJun 29, 21:30 UTC40m
2026-06-26 TAY8SL - Jun 26, 02:20 UTCJun 26, 03:05 UTC45m
2026-06-25 TAY9SL - Jun 25, 20:54 UTCJun 25, 21:35 UTC40m
2026-06-25 TAY8SL - Jun 25, 02:14 UTCJun 25, 03:04 UTC50m
2026-06-24 TAY9SL - Jun 24, 21:04 UTCJun 24, 21:44 UTC40m
2026-06-24 TAY8SL - Jun 24, 02:20 UTCJun 24, 03:04 UTC45m
2026-06-22 TAY9SL - Jun 22, 21:05 UTCJun 22, 21:54 UTC50m
2026-06-19 TAY8SL CDG → OSL Jun 19, 02:29 UTCJun 19, 03:09 UTC40m
2026-06-18 TAY9VL - Jun 18, 21:20 UTCJun 18, 23:00 UTC1h 40m
2026-06-18 TAY9VL - Jun 18, 19:05 UTCJun 18, 19:35 UTC30m
2026-06-18 TAY8VC - Jun 18, 05:30 UTCJun 18, 06:15 UTC45m
2026-06-18 TAY8VC - Jun 18, 03:05 UTCJun 18, 04:20 UTC1h 15m
2026-06-17 TAY6SF - Jun 17, 19:10 UTCJun 17, 22:00 UTC2h 50m
2026-06-17 TAY6SF - Jun 17, 17:35 UTCJun 17, 18:10 UTC35m
2026-06-17 TAY3SF - Jun 17, 06:15 UTCJun 17, 06:45 UTC30m
2026-06-17 TAY3SF - Jun 17, 02:50 UTCJun 17, 05:05 UTC2h 15m
2026-06-16 TAY6SF - Jun 16, 19:19 UTCJun 16, 22:05 UTC2h 46m
2026-06-16 TAY6SF - Jun 16, 17:40 UTCJun 16, 18:15 UTC35m
2026-06-16 TAY3SF - Jun 16, 06:20 UTCJun 16, 06:45 UTC25m
2026-06-16 TAY3SF CDG → OTP Jun 16, 03:00 UTCJun 16, 05:20 UTC2h 20m
2026-06-15 TAY6SF - Jun 15, 19:14 UTCJun 15, 22:00 UTC2h 45m
2026-06-15 TAY6SF - Jun 15, 17:34 UTCJun 15, 18:10 UTC35m
2026-06-14 TAY5TR - Jun 14, 21:25 UTCJun 14, 21:55 UTC30m
2026-06-14 TAY5TR - Jun 14, 18:10 UTCJun 14, 20:25 UTC2h 15m
2026-06-12 TAY4JU - Jun 12, 20:50 UTCJun 12, 22:40 UTC1h 50m
2026-06-12 TAY9VX - Jun 12, 02:15 UTCJun 12, 03:45 UTC1h 30m

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-IXK page for operator, model, and routing details .

Mode-S 440D4D frequently asked

What is Mode-S code 440D4D?
440D4D is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-IXK.
Where is Mode-S 440D4D registered?
Mode-S code 440D4D is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 440D4D broadcasting right now?
Yes. Mode-S 440D4D is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 440D4D, octal 21006515, decimal 4,459,853.
What flights does 440D4D operate?
Mode-S 440D4D has broadcast 20 distinct callsigns, including TAY1MN, TAY7CA, TAY6SF, TAY2MN, TAY9VX.