Apparatus

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sensors Mode-S transponder

440D31

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-XJM · MCDONNELL-DOUGLAS MD-900 Explorer

Hex
440D31
Octal
21006461
Decimal
4,459,825
Country
AT
Tail
OE-XJM
Type
EXPL
No current signal · last broadcast Jul 25, 19:45 UTC
Flights observed
147
Distinct callsigns
1
Country
AT
Last broadcast
Jul 25, 19:45 UTC

Last known position

Most recent position reported by Mode-S 440D31.

Country allocation

The ICAO 24-bit address 440D31 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 1 distinct

Callsign Airline Flights Last seen
MARTIN1 - 147 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 MARTIN1 - Jul 25, 19:35 UTCJul 25, 19:45 UTC10m
2026-07-25 MARTIN1 - Jul 25, 18:55 UTCJul 25, 19:05 UTC10m
2026-07-25 MARTIN1 - Jul 25, 08:45 UTCJul 25, 08:55 UTC10m
2026-07-25 MARTIN1 - Jul 25, 08:05 UTCJul 25, 08:15 UTC10m
2026-07-24 MARTIN1 - Jul 24, 13:10 UTCJul 24, 13:25 UTC15m
2026-07-23 MARTIN1 - Jul 23, 17:35 UTCJul 23, 17:45 UTC10m
2026-07-23 MARTIN1 - Jul 23, 16:50 UTCJul 23, 17:00 UTC10m
2026-07-22 MARTIN1 - Jul 22, 17:10 UTCJul 22, 18:10 UTC1h 0m
2026-07-22 MARTIN1 - Jul 22, 14:50 UTCJul 22, 15:30 UTC40m
2026-07-21 MARTIN1 - Jul 21, 18:50 UTCJul 21, 19:00 UTC10m
2026-07-21 MARTIN1 - Jul 21, 17:25 UTCJul 21, 18:20 UTC55m
2026-07-21 MARTIN1 - Jul 21, 09:30 UTCJul 21, 09:40 UTC10m
2026-07-19 MARTIN1 - Jul 19, 15:50 UTCJul 19, 17:00 UTC1h 10m
2026-07-19 MARTIN1 - Jul 19, 11:30 UTCJul 19, 11:40 UTC10m
2026-07-18 MARTIN1 - Jul 18, 20:05 UTCJul 18, 20:15 UTC10m
2026-07-18 MARTIN1 - Jul 18, 07:10 UTCJul 18, 07:40 UTC30m
2026-07-17 MARTIN1 - Jul 17, 17:20 UTCJul 17, 17:30 UTC10m
2026-07-17 MARTIN1 - Jul 17, 16:34 UTCJul 17, 16:49 UTC15m
2026-07-16 MARTIN1 - Jul 16, 18:50 UTCJul 16, 19:25 UTC35m
2026-07-16 MARTIN1 - Jul 16, 18:10 UTCJul 16, 18:19 UTC10m
2026-07-15 MARTIN1 - Jul 15, 18:40 UTCJul 15, 18:50 UTC10m
2026-07-15 MARTIN1 - Jul 15, 18:15 UTCJul 15, 18:20 UTC5m
2026-07-14 MARTIN1 - Jul 14, 12:50 UTCJul 14, 13:35 UTC45m
2026-07-13 MARTIN1 - Jul 13, 16:20 UTCJul 13, 16:55 UTC35m
2026-07-13 MARTIN1 - Jul 13, 12:35 UTCJul 13, 13:05 UTC30m
2026-07-12 MARTIN1 - Jul 12, 20:45 UTCJul 12, 21:35 UTC50m
2026-07-12 MARTIN1 - Jul 12, 19:45 UTCJul 12, 20:25 UTC40m
2026-07-12 MARTIN1 - Jul 12, 13:45 UTCJul 12, 14:50 UTC1h 5m
2026-07-12 MARTIN1 - Jul 12, 13:10 UTCJul 12, 13:20 UTC10m
2026-07-11 MARTIN1 - Jul 11, 11:15 UTCJul 11, 11:55 UTC40m
2026-07-11 MARTIN1 - Jul 11, 08:40 UTCJul 11, 10:05 UTC1h 25m
2026-07-09 MARTIN1 - Jul 9, 11:20 UTCJul 9, 12:05 UTC45m
2026-07-08 MARTIN1 - Jul 8, 11:55 UTCJul 8, 12:15 UTC20m
2026-07-08 MARTIN1 - Jul 8, 11:10 UTCJul 8, 11:40 UTC30m
2026-07-07 MARTIN1 - Jul 7, 09:25 UTCJul 7, 09:35 UTC10m
2026-07-06 MARTIN1 - Jul 6, 17:50 UTCJul 6, 18:00 UTC10m
2026-07-06 MARTIN1 - Jul 6, 16:55 UTCJul 6, 17:05 UTC10m
2026-07-04 MARTIN1 - Jul 4, 21:05 UTCJul 4, 21:15 UTC10m
2026-07-04 MARTIN1 - Jul 4, 20:35 UTCJul 4, 20:45 UTC10m
2026-07-04 MARTIN1 - Jul 4, 16:35 UTCJul 4, 16:45 UTC10m
2026-07-04 MARTIN1 - Jul 4, 16:05 UTCJul 4, 16:15 UTC10m
2026-07-04 MARTIN1 - Jul 4, 14:45 UTCJul 4, 14:55 UTC10m
2026-07-04 MARTIN1 - Jul 4, 14:25 UTCJul 4, 14:35 UTC10m
2026-07-04 MARTIN1 - Jul 4, 10:25 UTCJul 4, 12:25 UTC2h 0m
2026-07-03 MARTIN1 - Jul 3, 13:05 UTCJul 3, 13:15 UTC10m
2026-07-02 MARTIN1 - Jul 2, 09:55 UTCJul 2, 10:30 UTC35m
2026-07-02 MARTIN1 - Jul 2, 08:10 UTCJul 2, 08:55 UTC45m
2026-07-01 MARTIN1 - Jul 1, 09:35 UTCJul 1, 09:50 UTC15m
2026-06-30 MARTIN1 - Jun 30, 19:35 UTCJun 30, 19:45 UTC10m
2026-06-30 MARTIN1 - Jun 30, 16:05 UTCJun 30, 16:35 UTC30m

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

Mode-S 440D31 frequently asked

What is Mode-S code 440D31?
440D31 is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-XJM.
Where is Mode-S 440D31 registered?
Mode-S code 440D31 is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 440D31 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 19:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 440D31, octal 21006461, decimal 4,459,825.
What flights does 440D31 operate?
Mode-S 440D31 has broadcast 1 distinct callsign, including MARTIN1.