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 1h ago
Flights observed
165
Distinct callsigns
8
Country
AT
Last broadcast
1h 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 8 distinct

Callsign Airline Flights Last seen
AUA42 - 34 2026-07-11
AUA41 - 34 2026-07-11
AUA55 - 26 2026-07-13
AUA56 - 23 2026-07-13
AUA31X - 19 2026-07-08
AUA32X - 17 2026-07-09
AUA3VG - 6 2026-06-16
AUA38 - 6 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 AUA56 - Jul 13, 23:40 UTCJul 14, 00:50 UTC1h 10m
2026-07-13 AUA55 - Jul 13, 16:50 UTCJul 13, 17:35 UTC45m
2026-07-13 AUA55 - Jul 13, 09:20 UTCJul 13, 16:45 UTC7h 25m
2026-07-11 AUA42 IAD → VIE Jul 11, 21:45 UTCJul 12, 05:55 UTC8h 10m
2026-07-11 AUA41 VIE → IAD Jul 11, 09:05 UTCJul 11, 18:20 UTC9h 15m
2026-07-10 AUA42 IAD → VIE Jul 10, 21:55 UTCJul 11, 06:05 UTC8h 10m
2026-07-10 AUA41 VIE → IAD Jul 10, 09:05 UTCJul 10, 18:40 UTC9h 35m
2026-07-09 AUA32X BOS → VIE Jul 9, 21:35 UTCJul 10, 04:55 UTC7h 20m
2026-07-08 AUA31X VIE → BOS Jul 8, 09:05 UTCJul 8, 17:35 UTC8h 30m
2026-07-07 AUA56 YUL → VIE Jul 7, 23:40 UTCJul 8, 07:20 UTC7h 40m
2026-07-07 AUA55 VIE → YUL Jul 7, 09:15 UTCJul 7, 17:35 UTC8h 20m
2026-07-06 AUA56 YUL → VIE Jul 6, 23:00 UTCJul 7, 06:15 UTC7h 15m
2026-07-06 AUA55 VIE → YUL Jul 6, 09:45 UTCJul 6, 18:10 UTC8h 25m
2026-07-06 AUA42 IAD → VIE Jul 6, 00:05 UTCJul 6, 07:50 UTC7h 45m
2026-07-05 AUA41 VIE → IAD Jul 5, 09:10 UTCJul 5, 18:35 UTC9h 25m
2026-07-04 AUA56 YUL → VIE Jul 4, 23:20 UTCJul 5, 06:25 UTC7h 5m
2026-07-04 AUA55 VIE → YUL Jul 4, 09:20 UTCJul 4, 17:55 UTC8h 35m
2026-07-02 AUA42 IAD → VIE Jul 2, 22:00 UTCJul 3, 05:45 UTC7h 45m
2026-07-02 AUA41 VIE → IAD Jul 2, 09:40 UTCJul 2, 18:50 UTC9h 10m
2026-07-02 AUA56 YUL → VIE Jul 2, 00:00 UTCJul 2, 07:00 UTC7h 0m
2026-07-01 AUA55 VIE → YUL Jul 1, 09:15 UTCJul 1, 17:40 UTC8h 25m
2026-06-30 AUA32X AMS → VIE Jun 30, 21:20 UTCJul 1, 04:45 UTC7h 25m
2026-06-29 AUA31X VIE → BOS Jun 29, 09:34 UTCJun 29, 17:49 UTC8h 15m
2026-06-28 AUA56 YUL → VIE Jun 28, 23:50 UTCJun 29, 07:30 UTC7h 40m
2026-06-28 AUA55 VIE → YUL Jun 28, 09:39 UTCJun 28, 17:39 UTC8h 0m
2026-06-27 AUA32X AMS → VIE Jun 27, 22:04 UTCJun 28, 04:59 UTC6h 55m
2026-06-26 AUA31X VIE → BOS Jun 26, 08:54 UTCJun 26, 17:19 UTC8h 25m
2026-06-25 AUA56 YUL → VIE Jun 25, 23:39 UTCJun 26, 07:00 UTC7h 20m
2026-06-25 AUA55 VIE → YUL Jun 25, 09:20 UTCJun 25, 17:49 UTC8h 30m
2026-06-24 AUA42 IAD → VIE Jun 24, 21:50 UTCJun 25, 05:39 UTC7h 50m
2026-06-24 AUA41 VIE → IAD Jun 24, 09:00 UTCJun 24, 18:25 UTC9h 25m
2026-06-23 AUA42 IAD → VIE Jun 23, 21:59 UTCJun 24, 06:04 UTC8h 5m
2026-06-23 AUA41 VIE → IAD Jun 23, 09:14 UTCJun 23, 19:04 UTC9h 50m
2026-06-22 AUA56 YUL → VIE Jun 22, 23:24 UTCJun 23, 06:44 UTC7h 20m
2026-06-22 AUA55 VIE → YUL Jun 22, 09:19 UTCJun 22, 17:50 UTC8h 30m
2026-06-20 AUA32X AMS → VIE Jun 20, 22:35 UTCJun 21, 04:54 UTC6h 20m
2026-06-20 AUA32X AMS → VIE Jun 20, 21:30 UTCJun 20, 22:30 UTC1h 0m
2026-06-20 AUA32X AMS → VIE Jun 20, 21:19 UTCJun 20, 21:25 UTC5m
2026-06-19 AUA31X VIE → BOS Jun 19, 09:14 UTCJun 19, 17:59 UTC8h 45m
2026-06-19 AUA56 YUL → VIE Jun 19, 00:00 UTCJun 19, 07:19 UTC7h 19m
2026-06-18 AUA55 VIE → YUL Jun 18, 09:10 UTCJun 18, 17:25 UTC8h 15m
2026-06-17 AUA56 YUL → VIE Jun 17, 23:35 UTCJun 18, 07:00 UTC7h 25m
2026-06-17 AUA55 VIE → YUL Jun 17, 09:55 UTCJun 17, 17:50 UTC7h 55m
2026-06-16 AUA38 - Jun 16, 21:55 UTCJun 17, 05:30 UTC7h 35m
2026-06-16 AUA3VG VIE → EWR Jun 16, 08:55 UTCJun 16, 17:49 UTC8h 55m
2026-06-15 AUA42 IAD → VIE Jun 15, 21:50 UTCJun 16, 05:59 UTC8h 10m
2026-06-15 AUA41 VIE → IAD Jun 15, 09:05 UTCJun 15, 18:25 UTC9h 20m
2026-06-14 AUA42 IAD → VIE Jun 14, 21:50 UTCJun 15, 05:50 UTC8h 0m
2026-06-14 AUA41 VIE → IAD Jun 14, 09:05 UTCJun 14, 18:30 UTC9h 25m
2026-06-13 AUA38 - Jun 13, 22:30 UTCJun 14, 05:55 UTC7h 25m

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 1h 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 8 distinct callsigns, including AUA42, AUA41, AUA55, AUA56, AUA31X.