Apparatus

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sensors Mode-S transponder

440D91

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-IXM · BOEING 737-800

Hex
440D91
Octal
21006621
Decimal
4,459,921
Country
AT
Tail
OE-IXM
Type
B738
Broadcasting now · callsign FDX4463 · 10,050 ft
Flights observed
177
Distinct callsigns
20
Country
AT
Last broadcast
5h ago

Current position

440D91 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 440D91 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
TAY8SR - 14 2026-06-30
TAY7SR - 12 2026-06-30
TAY6DN ASL Airlines Belgium 8 2026-05-08
TAY5DN ASL Airlines Belgium 8 2026-05-08
TAY2VQ - 8 2026-07-01
TAY1KU - 8 2026-05-22
TAY8VC - 6 2026-06-28
TAY2MN - 6 2026-07-03
TAY2KU - 6 2026-05-22
TAY1MN - 6 2026-07-03
TAY1LA - 5 2026-06-17
TAY9VL - 4 2026-07-13
TAY9SL ASL Airlines Belgium 4 2026-06-16
TAY8SL ASL Airlines Belgium 4 2026-06-16
TAY7FO - 4 2026-06-05
TAY5TR ASL Airlines Belgium 4 2026-05-13
TAY1VQ - 4 2026-07-01
TAY9VX - 3 2026-06-17
TAY9SR - 3 2026-04-17
TAY8LL - 3 2026-05-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 TAY9VL BCN → CDG Jul 13, 20:55 UTCJul 13, 22:15 UTC1h 20m
2026-07-13 TAY9VL VLC → BCN Jul 13, 19:00 UTCJul 13, 19:35 UTC35m
2026-07-12 TAY8IT - Jul 12, 20:05 UTCJul 12, 20:45 UTC40m
2026-07-12 TAY8IT - Jul 12, 15:35 UTCJul 12, 16:45 UTC1h 10m
2026-07-10 TAY4993 - Jul 10, 21:10 UTCJul 10, 22:45 UTC1h 35m
2026-07-10 TAY7AD - Jul 10, 02:20 UTCJul 10, 03:55 UTC1h 35m
2026-07-09 FDX4678 - Jul 9, 20:30 UTCJul 9, 22:20 UTC1h 50m
2026-07-09 FDX4463 - Jul 9, 02:25 UTCJul 9, 04:05 UTC1h 40m
2026-07-08 TAY5AD - Jul 8, 21:10 UTCJul 8, 22:40 UTC1h 30m
2026-07-08 TAY8MD - Jul 8, 02:20 UTCJul 8, 03:50 UTC1h 30m
2026-07-03 TAY2MN LIS → CDG Jul 3, 19:50 UTCJul 3, 22:00 UTC2h 10m
2026-07-03 TAY2MN - Jul 3, 17:35 UTCJul 3, 18:20 UTC45m
2026-07-03 TAY1MN - Jul 3, 06:05 UTCJul 3, 06:55 UTC50m
2026-07-03 TAY1MN - Jul 3, 02:55 UTCJul 3, 05:00 UTC2h 5m
2026-07-02 TAY2MN LIS → CDG Jul 2, 19:25 UTCJul 2, 21:30 UTC2h 5m
2026-07-02 TAY2MN - Jul 2, 17:05 UTCJul 2, 18:00 UTC55m
2026-07-02 TAY1MN - Jul 2, 06:51 UTCJul 2, 07:50 UTC59m
2026-07-02 TAY1MN CDG → LIS Jul 2, 03:20 UTCJul 2, 05:35 UTC2h 15m
2026-07-01 TAY2VQ - Jul 1, 20:25 UTCJul 1, 21:45 UTC1h 20m
2026-07-01 TAY2VQ - Jul 1, 18:10 UTCJul 1, 19:05 UTC55m
2026-07-01 TAY1VQ - Jul 1, 06:05 UTCJul 1, 06:45 UTC40m
2026-07-01 TAY1VQ - Jul 1, 02:15 UTCJul 1, 04:05 UTC1h 50m
2026-06-30 TAY8SR - Jun 30, 21:30 UTCJun 30, 22:20 UTC50m
2026-06-30 TAY8SR - Jun 30, 19:00 UTCJun 30, 20:15 UTC1h 15m
2026-06-30 TAY7SR - Jun 30, 06:20 UTCJun 30, 07:25 UTC1h 5m
2026-06-30 TAY7SR - Jun 30, 02:05 UTCJun 30, 03:10 UTC1h 5m
2026-06-29 TAY2VQ - Jun 29, 20:24 UTCJun 29, 21:34 UTC1h 10m
2026-06-29 TAY2VQ - Jun 29, 18:05 UTCJun 29, 19:05 UTC1h 0m
2026-06-28 TAY8VC - Jun 28, 18:59 UTCJun 28, 21:14 UTC2h 15m
2026-06-26 TAY5VC BCN → CDG Jun 26, 21:30 UTCJun 26, 22:55 UTC1h 25m
2026-06-26 TAY5VC VLC → BCN Jun 26, 19:09 UTCJun 26, 19:55 UTC45m
2026-06-26 TAY8VC - Jun 26, 05:44 UTCJun 26, 06:29 UTC45m
2026-06-26 TAY8VC - Jun 26, 03:24 UTCJun 26, 04:34 UTC1h 10m
2026-06-25 TAY2VQ - Jun 25, 20:34 UTCJun 25, 21:44 UTC1h 10m
2026-06-25 TAY2VQ - Jun 25, 18:15 UTCJun 25, 19:05 UTC50m
2026-06-25 TAY1VQ - Jun 25, 06:00 UTCJun 25, 06:50 UTC50m
2026-06-25 TAY1VQ LGG → MAD Jun 25, 02:10 UTCJun 25, 04:04 UTC1h 55m
2026-06-24 TAY4BC - Jun 24, 06:25 UTCJun 24, 08:09 UTC1h 45m
2026-06-24 TAY4BC CDG → BCN Jun 24, 02:49 UTCJun 24, 04:05 UTC1h 15m
2026-06-23 TAY4RQ NUE → BRQ Jun 23, 19:24 UTCJun 23, 20:54 UTC1h 30m
2026-06-23 TAY3RQ PRG → BRQ Jun 23, 05:09 UTCJun 23, 05:34 UTC25m
2026-06-23 TAY3RQ CDG → PRG Jun 23, 02:40 UTCJun 23, 03:54 UTC1h 15m
2026-06-22 TAY4RQ NUE → BRQ Jun 22, 19:29 UTCJun 22, 21:05 UTC1h 35m
2026-06-21 TAY2RQ - Jun 21, 21:54 UTCJun 21, 22:15 UTC20m
2026-06-21 TAY2RQ - Jun 21, 18:54 UTCJun 21, 20:40 UTC1h 45m
2026-06-19 TAY2MN - Jun 19, 20:04 UTCJun 19, 22:09 UTC2h 5m
2026-06-19 TAY2MN - Jun 19, 17:34 UTCJun 19, 18:30 UTC55m
2026-06-19 TAY1MN - Jun 19, 07:04 UTCJun 19, 07:54 UTC50m
2026-06-19 TAY1MN - Jun 19, 03:24 UTCJun 19, 05:40 UTC2h 15m
2026-06-18 TAY6SF - Jun 18, 20:40 UTCJun 18, 23:30 UTC2h 50m

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

Mode-S 440D91 frequently asked

What is Mode-S code 440D91?
440D91 is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-IXM.
Where is Mode-S 440D91 registered?
Mode-S code 440D91 is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 440D91 broadcasting right now?
Yes. Mode-S 440D91 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 440D91, octal 21006621, decimal 4,459,921.
What flights does 440D91 operate?
Mode-S 440D91 has broadcast 20 distinct callsigns, including TAY8SR, TAY7SR, TAY6DN, TAY5DN, TAY2VQ.