Apparatus

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sensors Mode-S transponder

440B91

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-IXC · BOEING 737-800

Hex
440B91
Octal
21005621
Decimal
4,459,409
Country
AT
Tail
OE-IXC
Type
B738
No current signal · last broadcast 58m ago
Flights observed
108
Distinct callsigns
20
Country
AT
Last broadcast
58m ago

Last known position

Most recent position reported by Mode-S 440B91.

Country allocation

The ICAO 24-bit address 440B91 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
TAY8VC - 15 2026-05-20
TAY9VC - 13 2026-05-20
TAY2VQ ASL Airlines Belgium 12 2026-05-21
TAY1VQ - 12 2026-05-21
TAY7FO - 8 2026-05-28
TAY1LA ASL Airlines Belgium 8 2026-05-28
TAY2ST - 5 2026-04-17
TAY7SR ASL Airlines Belgium 4 2026-05-22
TAY5TR ASL Airlines Belgium 4 2026-04-30
TAY6TR ASL Airlines Belgium 3 2026-05-04
TAY1ST - 3 2026-04-17
TAY9SR - 2 2026-05-22
TAY8SR - 2 2026-05-19
TAY6SO - 2 2026-06-01
TAY5VA ASL Airlines Belgium 2 2026-06-02
TAY5AD ASL Airlines Belgium 2 2026-05-08
TAY4VA - 2 2026-06-02
TAY2MN ASL Airlines Belgium 2 2026-05-11
TAY1MN ASL Airlines Belgium 2 2026-05-11
TAY5SO - 1 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 TAY5VA LYS → CDG Jun 2, 21:05 UTCJun 2, 21:55 UTC50m
2026-06-02 TAY5VA LYS → CDG Jun 2, 19:15 UTCJun 2, 19:35 UTC20m
2026-06-02 TAY4VA LYS → GVA Jun 2, 04:30 UTCJun 2, 04:50 UTC20m
2026-06-02 TAY4VA CDG → LYS Jun 2, 02:45 UTCJun 2, 03:30 UTC45m
2026-06-01 TAY6SO - Jun 1, 20:10 UTCJun 1, 21:50 UTC1h 40m
2026-06-01 TAY6SO - Jun 1, 18:20 UTCJun 1, 18:50 UTC30m
2026-05-31 TAY5SO - May 31, 17:20 UTCMay 31, 19:15 UTC1h 55m
2026-05-28 TAY1LA MLA → BLQ May 28, 20:55 UTCMay 28, 22:40 UTC1h 45m
2026-05-28 TAY1LA MLA → BLQ May 28, 17:25 UTCMay 28, 18:40 UTC1h 15m
2026-05-28 TAY7FO - May 28, 05:00 UTCMay 28, 06:10 UTC1h 10m
2026-05-28 TAY7FO - May 28, 02:20 UTCMay 28, 03:50 UTC1h 30m
2026-05-27 TAY1LA MLA → BLQ May 27, 20:55 UTCMay 27, 22:40 UTC1h 45m
2026-05-27 TAY1LA MLA → BLQ May 27, 17:30 UTCMay 27, 18:40 UTC1h 10m
2026-05-27 TAY7FO - May 27, 05:04 UTCMay 27, 06:04 UTC1h 0m
2026-05-27 TAY7FO - May 27, 02:09 UTCMay 27, 03:39 UTC1h 30m
2026-05-26 TAY1LA MLA → BLQ May 26, 20:54 UTCMay 26, 22:35 UTC1h 40m
2026-05-26 TAY1LA MLA → BLQ May 26, 17:20 UTCMay 26, 18:30 UTC1h 10m
2026-05-26 TAY7FO - May 26, 05:05 UTCMay 26, 06:10 UTC1h 5m
2026-05-26 TAY7FO - May 26, 02:15 UTCMay 26, 03:50 UTC1h 35m
2026-05-25 TAY1LA MLA → BLQ May 25, 20:55 UTCMay 25, 22:30 UTC1h 35m
2026-05-25 TAY1LA MLA → BLQ May 25, 17:15 UTCMay 25, 18:25 UTC1h 10m
2026-05-24 TAY7FO - May 24, 21:10 UTCMay 24, 21:50 UTC40m
2026-05-24 TAY7FO - May 24, 18:15 UTCMay 24, 19:55 UTC1h 40m
2026-05-22 TAY9SR MXP → CDG May 22, 21:40 UTCMay 22, 22:50 UTC1h 10m
2026-05-22 TAY9SR - May 22, 18:50 UTCMay 22, 20:15 UTC1h 25m
2026-05-22 TAY7SR TSR → LGG May 22, 04:40 UTCMay 22, 05:45 UTC1h 5m
2026-05-22 TAY7SR TSR → LGG May 22, 02:00 UTCMay 22, 03:15 UTC1h 15m
2026-05-21 TAY2VQ VIT → CDG May 21, 20:30 UTCMay 21, 21:35 UTC1h 5m
2026-05-21 TAY2VQ VIT → CDG May 21, 18:15 UTCMay 21, 19:10 UTC55m
2026-05-21 TAY1VQ MAD → SVQ May 21, 06:00 UTCMay 21, 06:45 UTC45m
2026-05-21 TAY1VQ - May 21, 02:10 UTCMay 21, 04:15 UTC2h 5m
2026-05-20 TAY9VC - May 20, 20:55 UTCMay 20, 22:40 UTC1h 45m
2026-05-20 TAY9VC - May 20, 18:55 UTCMay 20, 19:35 UTC40m
2026-05-20 TAY8VC - May 20, 05:35 UTCMay 20, 06:15 UTC40m
2026-05-20 TAY8VC - May 20, 03:10 UTCMay 20, 04:20 UTC1h 10m
2026-05-19 TAY2GG - May 19, 23:40 UTCMay 20, 00:15 UTC35m
2026-05-19 TAY8SR - May 19, 21:25 UTCMay 19, 22:20 UTC55m
2026-05-19 TAY8SR - May 19, 18:45 UTCMay 19, 20:00 UTC1h 15m
2026-05-19 TAY7SR TSR → LGG May 19, 04:30 UTCMay 19, 05:35 UTC1h 5m
2026-05-19 TAY7SR TSR → LGG May 19, 02:10 UTCMay 19, 03:20 UTC1h 10m
2026-05-18 FDX4678 MUC → TLV May 18, 20:50 UTCMay 18, 22:35 UTC1h 45m
2026-05-18 TAY4998 TSR → LGG May 18, 17:50 UTCMay 18, 19:15 UTC1h 24m
2026-05-14 TAY9VC - May 14, 21:20 UTCMay 14, 23:05 UTC1h 45m
2026-05-14 TAY9VC VLC → BCN May 14, 19:20 UTCMay 14, 20:05 UTC45m
2026-05-14 TAY8VC - May 14, 05:35 UTCMay 14, 06:15 UTC40m
2026-05-14 TAY8VC - May 14, 03:15 UTCMay 14, 04:15 UTC1h 0m
2026-05-13 TAY2VQ VIT → CDG May 13, 20:25 UTCMay 13, 21:45 UTC1h 20m
2026-05-13 TAY2VQ VIT → CDG May 13, 18:20 UTCMay 13, 19:05 UTC45m
2026-05-13 TAY1VQ MAD → SVQ May 13, 06:00 UTCMay 13, 06:50 UTC50m
2026-05-13 TAY1VQ - May 13, 02:15 UTCMay 13, 04:25 UTC2h 10m

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

Mode-S 440B91 frequently asked

What is Mode-S code 440B91?
440B91 is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-IXC.
Where is Mode-S 440B91 registered?
Mode-S code 440B91 is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 440B91 broadcasting right now?
No active broadcast right now. Last signal was 58m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 440B91, octal 21005621, decimal 4,459,409.
What flights does 440B91 operate?
Mode-S 440B91 has broadcast 20 distinct callsigns, including TAY8VC, TAY9VC, TAY2VQ, TAY1VQ, TAY7FO.