Apparatus

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sensors Mode-S transponder

44001E

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-LAY · BOEING 767-300

Hex
44001E
Octal
21000036
Decimal
4,456,478
Country
AT
Tail
OE-LAY
Type
B763
No current signal · last broadcast 8h ago
Flights observed
94
Distinct callsigns
6
Country
AT
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 44001E.

Country allocation

The ICAO 24-bit address 44001E 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 6 distinct

Callsign Airline Flights Last seen
AUA42 Austrian Airlines 23 2026-05-27
AUA41 Austrian Airlines 23 2026-05-27
AUA55 Austrian Airlines 15 2026-05-28
AUA56 Austrian Airlines 13 2026-05-28
AUA31X Austrian Airlines 12 2026-05-29
AUA32X Austrian Airlines 8 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 AUA31X VIE → BOS May 29, 08:55 UTCMay 29, 17:15 UTC8h 20m
2026-05-28 AUA56 YUL → VIE May 28, 23:05 UTCMay 29, 06:40 UTC7h 35m
2026-05-28 AUA55 VIE → YUL May 28, 09:15 UTCMay 28, 17:25 UTC8h 10m
2026-05-27 AUA42 IAD → VIE May 27, 21:45 UTCMay 28, 06:05 UTC8h 20m
2026-05-27 AUA41 VIE → IAD May 27, 09:05 UTCMay 27, 18:25 UTC9h 20m
2026-05-26 AUA56 YUL → VIE May 26, 22:59 UTCMay 27, 06:15 UTC7h 15m
2026-05-26 AUA55 VIE → YUL May 26, 09:15 UTCMay 26, 17:30 UTC8h 15m
2026-05-25 AUA42 IAD → VIE May 25, 21:45 UTCMay 26, 05:54 UTC8h 10m
2026-05-25 AUA41 VIE → IAD May 25, 09:05 UTCMay 25, 18:25 UTC9h 20m
2026-05-24 AUA42 IAD → VIE May 24, 23:00 UTCMay 25, 05:55 UTC6h 55m
2026-05-24 AUA41 VIE → IAD May 24, 09:05 UTCMay 24, 18:30 UTC9h 25m
2026-05-23 AUA56 YUL → VIE May 23, 22:55 UTCMay 24, 06:20 UTC7h 25m
2026-05-23 AUA55 VIE → YUL May 23, 09:20 UTCMay 23, 17:45 UTC8h 25m
2026-05-21 AUA42 IAD → VIE May 21, 22:05 UTCMay 22, 05:55 UTC7h 50m
2026-05-21 AUA41 VIE → IAD May 21, 09:05 UTCMay 21, 18:35 UTC9h 30m
2026-05-20 AUA42 IAD → VIE May 20, 22:45 UTCMay 21, 06:45 UTC8h 0m
2026-05-20 AUA41 VIE → IAD May 20, 09:00 UTCMay 20, 18:30 UTC9h 30m
2026-05-19 AUA32X AMS → VIE May 19, 21:55 UTCMay 20, 05:15 UTC7h 21m
2026-05-18 AUA31X VIE → BOS May 18, 09:45 UTCMay 18, 18:00 UTC8h 15m
2026-05-17 AUA42 IAD → VIE May 17, 21:40 UTCMay 18, 06:01 UTC8h 20m
2026-05-17 AUA41 VIE → IAD May 17, 09:10 UTCMay 17, 18:10 UTC9h 0m
2026-05-16 AUA32X AMS → VIE May 16, 21:30 UTCMay 17, 04:50 UTC7h 20m
2026-05-15 AUA31X VIE → BOS May 15, 08:50 UTCMay 15, 17:35 UTC8h 44m
2026-05-14 AUA32X AMS → VIE May 14, 21:45 UTCMay 15, 04:55 UTC7h 10m
2026-05-13 AUA31X VIE → BOS May 13, 09:05 UTCMay 13, 17:40 UTC8h 35m
2026-05-12 AUA42 IAD → VIE May 12, 21:50 UTCMay 13, 06:15 UTC8h 25m
2026-05-12 AUA41 VIE → IAD May 12, 09:00 UTCMay 12, 18:35 UTC9h 35m
2026-05-12 AUA56 YUL → VIE May 12, 03:45 UTCMay 12, 06:20 UTC2h 35m
2026-05-11 AUA55 VIE → YUL May 11, 09:10 UTCMay 11, 17:45 UTC8h 35m
2026-05-09 AUA32X AMS → VIE May 9, 22:20 UTCMay 10, 05:00 UTC6h 40m
2026-05-09 AUA32X AMS → VIE May 9, 21:30 UTCMay 9, 22:15 UTC45m
2026-05-08 AUA31X VIE → BOS May 8, 08:55 UTCMay 8, 17:40 UTC8h 45m
2026-05-07 AUA42 IAD → VIE May 7, 21:35 UTCMay 8, 05:35 UTC8h 0m
2026-05-07 AUA41 VIE → IAD May 7, 09:00 UTCMay 7, 18:35 UTC9h 35m
2026-05-06 AUA56 YUL → VIE May 6, 22:55 UTCMay 7, 06:20 UTC7h 25m
2026-05-06 AUA55 VIE → YUL May 6, 10:55 UTCMay 6, 17:50 UTC6h 55m
2026-05-06 AUA55 VIE → YUL May 6, 09:15 UTCMay 6, 10:50 UTC1h 35m
2026-05-05 AUA56 YUL → VIE May 5, 22:45 UTCMay 6, 06:05 UTC7h 19m
2026-05-05 AUA55 VIE → YUL May 5, 09:25 UTCMay 5, 17:40 UTC8h 15m
2026-05-04 AUA42 IAD → VIE May 4, 21:50 UTCMay 5, 06:05 UTC8h 15m
2026-05-04 AUA41 VIE → IAD May 4, 09:00 UTCMay 4, 18:25 UTC9h 25m
2026-05-03 AUA42 IAD → VIE May 3, 22:05 UTCMay 4, 06:20 UTC8h 15m
2026-05-03 AUA41 VIE → IAD May 3, 09:10 UTCMay 3, 18:45 UTC9h 35m
2026-05-02 AUA56 YUL → VIE May 2, 23:05 UTCMay 3, 06:40 UTC7h 34m
2026-05-02 AUA55 VIE → YUL May 2, 09:20 UTCMay 2, 17:30 UTC8h 10m
2026-04-30 AUA32X AMS → VIE Apr 30, 21:15 UTCMay 1, 05:05 UTC7h 50m
2026-04-29 AUA31X VIE → BOS Apr 29, 08:55 UTCApr 29, 17:05 UTC8h 11m
2026-04-28 AUA56 YUL → VIE Apr 28, 23:14 UTCApr 29, 06:49 UTC7h 35m
2026-04-28 AUA55 VIE → YUL Apr 28, 09:30 UTCApr 28, 17:40 UTC8h 10m
2026-04-27 AUA42 IAD → VIE Apr 27, 21:40 UTCApr 28, 06:15 UTC8h 35m

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

Mode-S 44001E frequently asked

What is Mode-S code 44001E?
44001E is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-LAY.
Where is Mode-S 44001E registered?
Mode-S code 44001E is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 44001E broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 44001E, octal 21000036, decimal 4,456,478.
What flights does 44001E operate?
Mode-S 44001E has broadcast 6 distinct callsigns, including AUA42, AUA41, AUA55, AUA56, AUA31X.