Apparatus

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sensors Mode-S transponder

440B90

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-IXB · BOEING 737-800

Hex
440B90
Octal
21005620
Decimal
4,459,408
Country
AT
Tail
OE-IXB
Type
B738
No current signal · last broadcast 11h ago
Flights observed
122
Distinct callsigns
20
Country
AT
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S 440B90.

Country allocation

The ICAO 24-bit address 440B90 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
TAY5VA ASL Airlines Belgium 18 2026-04-27
TAY4VA - 17 2026-04-25
TAY6DN ASL Airlines Belgium 15 2026-05-29
TAY5DN ASL Airlines Belgium 14 2026-05-29
TAY2VQ ASL Airlines Belgium 6 2026-05-14
TAY8VC - 5 2026-05-15
TAY2ST - 4 2026-05-11
TAY1VQ - 4 2026-05-14
TAY1ST - 4 2026-05-09
TAY7CA ASL Airlines Belgium 3 2026-05-19
TAY9VC - 2 2026-05-13
TAY9IE - 2 2026-05-04
TAY958T - 2 2026-05-17
TAY8SR - 2 2026-05-05
TAY8LL - 2 2026-04-24
TAY7SR ASL Airlines Belgium 2 2026-05-05
TAY6CA ASL Airlines Belgium 2 2026-05-19
TAY5VC - 2 2026-05-15
TAY4RQ ASL Airlines Belgium 2 2026-05-22
TAY3WZ - 2 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 TAY6DN BLL → GDN May 29, 20:25 UTCMay 29, 21:50 UTC1h 25m
2026-05-29 TAY6DN BLL → GDN May 29, 18:20 UTCMay 29, 18:55 UTC35m
2026-05-29 TAY5DN CDG → PRG May 29, 04:00 UTCMay 29, 05:05 UTC1h 5m
2026-05-29 TAY5DN CDG → PRG May 29, 02:20 UTCMay 29, 03:15 UTC55m
2026-05-28 TAY6DN BLL → GDN May 28, 21:20 UTCMay 28, 22:30 UTC1h 10m
2026-05-28 TAY6DN BLL → GDN May 28, 18:40 UTCMay 28, 19:05 UTC25m
2026-05-28 TAY5DN CDG → PRG May 28, 04:05 UTCMay 28, 05:05 UTC1h 0m
2026-05-28 TAY5DN CDG → PRG May 28, 02:05 UTCMay 28, 03:05 UTC1h 0m
2026-05-27 TAY6DN BLL → GDN May 27, 21:05 UTCMay 27, 22:20 UTC1h 15m
2026-05-27 TAY6DN BLL → GDN May 27, 18:40 UTCMay 27, 19:55 UTC1h 15m
2026-05-27 TAY5DN CDG → PRG May 27, 04:09 UTCMay 27, 05:04 UTC55m
2026-05-27 TAY5DN CDG → PRG May 27, 01:54 UTCMay 27, 02:54 UTC1h 0m
2026-05-26 TAY6DN BLL → GDN May 26, 21:14 UTCMay 26, 22:29 UTC1h 15m
2026-05-26 TAY6DN BLL → GDN May 26, 18:50 UTCMay 26, 20:00 UTC1h 10m
2026-05-26 TAY5DN CDG → PRG May 26, 04:10 UTCMay 26, 05:10 UTC1h 0m
2026-05-26 TAY5DN CDG → PRG May 26, 01:55 UTCMay 26, 02:55 UTC1h 0m
2026-05-25 TAY4678 KTW → CDG May 25, 20:50 UTCMay 25, 22:34 UTC1h 45m
2026-05-25 TAY6DN BLL → GDN May 25, 18:40 UTCMay 25, 19:25 UTC44m
2026-05-24 TAY3WZ - May 24, 20:35 UTCMay 24, 21:25 UTC50m
2026-05-24 TAY3WZ - May 24, 17:50 UTCMay 24, 19:30 UTC1h 40m
2026-05-22 TAY4RQ NUE → BRQ May 22, 21:25 UTCMay 22, 22:40 UTC1h 15m
2026-05-22 TAY4RQ NUE → BRQ May 22, 19:30 UTCMay 22, 20:20 UTC50m
2026-05-22 TAY3RQ CDG → PRG May 22, 05:00 UTCMay 22, 05:35 UTC35m
2026-05-22 TAY3RQ CDG → PRG May 22, 02:40 UTCMay 22, 03:55 UTC1h 15m
2026-05-21 TAY1BS - May 21, 21:00 UTCMay 21, 21:45 UTC45m
2026-05-21 TAY3BS - May 21, 19:00 UTCMay 21, 19:45 UTC45m
2026-05-21 TAY6BS - May 21, 15:35 UTCMay 21, 16:25 UTC50m
2026-05-21 TAY7BS CDG → BSL May 21, 02:40 UTCMay 21, 03:20 UTC40m
2026-05-20 TAY7VC - May 20, 20:30 UTCMay 20, 21:55 UTC1h 25m
2026-05-20 TAY9VX - May 20, 02:25 UTCMay 20, 03:35 UTC1h 10m
2026-05-19 TAY7CA FCO → ATH May 19, 21:35 UTCMay 19, 22:45 UTC1h 10m
2026-05-19 TAY7CA FCO → ATH May 19, 18:10 UTCMay 19, 20:30 UTC2h 20m
2026-05-19 TAY7CA FCO → ATH May 19, 15:10 UTCMay 19, 16:40 UTC1h 30m
2026-05-19 TAY6CA CDG → LCA May 19, 06:55 UTCMay 19, 08:05 UTC1h 10m
2026-05-19 TAY6CA CDG → LCA May 19, 02:55 UTCMay 19, 05:40 UTC2h 45m
2026-05-17 TAY958T - May 17, 14:45 UTCMay 17, 15:05 UTC20m
2026-05-17 TAY958T - May 17, 12:20 UTCMay 17, 12:35 UTC15m
2026-05-15 TAY5VC BCN → CDG May 15, 21:05 UTCMay 15, 22:35 UTC1h 30m
2026-05-15 TAY5VC - May 15, 19:00 UTCMay 15, 19:45 UTC45m
2026-05-15 TAY8VC - May 15, 05:40 UTCMay 15, 06:20 UTC40m
2026-05-15 TAY8VC - May 15, 03:15 UTCMay 15, 04:20 UTC1h 5m
2026-05-14 TAY2VQ VIT → CDG May 14, 20:30 UTCMay 14, 21:50 UTC1h 20m
2026-05-14 TAY2VQ VIT → CDG May 14, 18:15 UTCMay 14, 19:10 UTC55m
2026-05-14 TAY1VQ MAD → SVQ May 14, 05:55 UTCMay 14, 06:45 UTC50m
2026-05-14 TAY1VQ - May 14, 02:05 UTCMay 14, 04:00 UTC1h 55m
2026-05-13 TAY9VC - May 13, 21:00 UTCMay 13, 22:45 UTC1h 45m
2026-05-13 TAY9VC - May 13, 19:00 UTCMay 13, 19:40 UTC40m
2026-05-13 TAY8VC - May 13, 05:35 UTCMay 13, 06:15 UTC40m
2026-05-13 TAY8VC - May 13, 03:15 UTCMay 13, 04:20 UTC1h 5m
2026-05-12 TAY2VQ VIT → CDG May 12, 20:30 UTCMay 12, 21:45 UTC1h 15m

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

Mode-S 440B90 frequently asked

What is Mode-S code 440B90?
440B90 is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-IXB.
Where is Mode-S 440B90 registered?
Mode-S code 440B90 is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 440B90 broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 440B90, octal 21005620, decimal 4,459,408.
What flights does 440B90 operate?
Mode-S 440B90 has broadcast 20 distinct callsigns, including TAY5VA, TAY4VA, TAY6DN, TAY5DN, TAY2VQ.