sensors Mode-S transponder

440D4C

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-IXJ · BOEING 737-800

Hex
440D4C
Octal
21006514
Decimal
4,459,852
Country
AT
Tail
OE-IXJ
Type
B738
No current signal · last broadcast 17h ago
Flights observed
6
Distinct callsigns
3
Country
AT
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S 440D4C.

Country allocation

The ICAO 24-bit address 440D4C 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 3 distinct

Callsign Airline Flights Last seen
TAY2MN - 3 2026-04-13
TAY1MN ASL Airlines Belgium 2 2026-04-13
TAY3RQ - 1 2026-04-14

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-14 TAY3RQ - Apr 14, 05:15 UTCApr 14, 05:30 UTC15m
2026-04-13 TAY2MN - Apr 13, 19:50 UTCApr 13, 21:40 UTC1h 50m
2026-04-13 TAY2MN - Apr 13, 19:25 UTCApr 13, 20:10 UTC45m
2026-04-13 TAY2MN - Apr 13, 17:25 UTCApr 13, 18:25 UTC1h 0m
2026-04-13 TAY1MN CDG → LIS Apr 13, 05:10 UTCApr 13, 05:55 UTC45m
2026-04-13 TAY1MN CDG → LIS Apr 13, 01:35 UTCApr 13, 03:45 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-IXJ page for operator, model, and routing details .

Mode-S 440D4C frequently asked

What is Mode-S code 440D4C?
440D4C is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-IXJ.
Where is Mode-S 440D4C registered?
Mode-S code 440D4C is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 440D4C broadcasting right now?
No active broadcast right now. Last signal was 17h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 440D4C, octal 21006514, decimal 4,459,852.
What flights does 440D4C operate?
Mode-S 440D4C has broadcast 3 distinct callsigns, including TAY2MN, TAY1MN, TAY3RQ.