Apparatus

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sensors Mode-S transponder

440637

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-HPL · EMBRAER EMB-550 Praetor 600

Hex
440637
Octal
21003067
Decimal
4,458,039
Country
AT
Tail
OE-HPL
Type
E550
No current signal · last broadcast 10h ago
Flights observed
89
Distinct callsigns
3
Country
AT
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S 440637.

Country allocation

The ICAO 24-bit address 440637 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
LDX344C - 83 2026-07-21
LDX44PL - 4 2026-07-05
LDX344 - 2 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 LDX344C - Jul 21, 11:25 UTCJul 21, 12:00 UTC35m
2026-07-21 LDX344C - Jul 21, 09:35 UTCJul 21, 10:05 UTC30m
2026-07-20 LDX344C MXP → CEQ Jul 20, 07:15 UTCJul 20, 08:00 UTC45m
2026-07-19 LDX344C - Jul 19, 16:40 UTCJul 19, 17:20 UTC40m
2026-07-19 LDX344C - Jul 19, 14:30 UTCJul 19, 15:05 UTC35m
2026-07-19 LDX344C - Jul 19, 11:55 UTCJul 19, 13:20 UTC1h 25m
2026-07-19 LDX344C - Jul 19, 08:45 UTCJul 19, 09:45 UTC1h 0m
2026-07-17 LDX344C - Jul 17, 08:54 UTCJul 17, 09:45 UTC50m
2026-07-17 LDX344C - Jul 17, 06:15 UTCJul 17, 06:50 UTC35m
2026-07-15 LDX344C - Jul 15, 12:50 UTCJul 15, 14:10 UTC1h 20m
2026-07-05 LDX44PL - Jul 5, 08:00 UTCJul 5, 10:15 UTC2h 15m
2026-07-04 LDX344C - Jul 4, 14:55 UTCJul 4, 16:00 UTC1h 5m
2026-07-04 LDX344C - Jul 4, 11:10 UTCJul 4, 12:15 UTC1h 5m
2026-07-03 LDX344C - Jul 3, 17:45 UTCJul 3, 18:50 UTC1h 5m
2026-07-03 LDX344C - Jul 3, 14:50 UTCJul 3, 15:15 UTC25m
2026-07-03 LDX344C - Jul 3, 11:05 UTCJul 3, 12:15 UTC1h 10m
2026-07-02 LDX344C - Jul 2, 15:35 UTCJul 2, 16:10 UTC35m
2026-07-02 LDX344C - Jul 2, 13:15 UTCJul 2, 14:15 UTC1h 0m
2026-06-29 LDX344C - Jun 29, 09:20 UTCJun 29, 10:04 UTC45m
2026-06-28 LDX344C - Jun 28, 18:44 UTCJun 28, 20:29 UTC1h 45m
2026-06-27 LDX344C - Jun 27, 15:05 UTCJun 27, 16:59 UTC1h 55m
2026-06-23 LDX344C - Jun 23, 14:29 UTCJun 23, 15:15 UTC45m
2026-06-23 LDX344C LIN → NCE Jun 23, 12:49 UTCJun 23, 13:29 UTC40m
2026-06-23 LDX344C - Jun 23, 10:15 UTCJun 23, 11:14 UTC1h 0m
2026-06-20 LDX344C - Jun 20, 15:44 UTCJun 20, 16:55 UTC1h 10m
2026-06-20 LDX344C - Jun 20, 07:54 UTCJun 20, 08:25 UTC30m
2026-06-19 LDX344C - Jun 19, 15:04 UTCJun 19, 15:34 UTC30m
2026-06-19 LDX344C - Jun 19, 12:54 UTCJun 19, 13:59 UTC1h 5m
2026-06-18 LDX344C - Jun 18, 12:05 UTCJun 18, 12:55 UTC50m
2026-06-18 LDX344C - Jun 18, 09:55 UTCJun 18, 10:55 UTC1h 0m
2026-06-18 LDX344C - Jun 18, 07:15 UTCJun 18, 08:05 UTC50m
2026-06-17 LDX344C - Jun 17, 19:10 UTCJun 17, 20:00 UTC50m
2026-06-17 LDX344C LBG → FMO Jun 17, 13:15 UTCJun 17, 14:15 UTC1h 0m
2026-06-15 LDX344C - Jun 15, 12:55 UTCJun 15, 13:45 UTC50m
2026-06-15 LDX344C - Jun 15, 10:05 UTCJun 15, 11:05 UTC1h 0m
2026-06-14 LDX344C - Jun 14, 10:45 UTCJun 14, 11:15 UTC30m
2026-06-14 LDX344C - Jun 14, 08:30 UTCJun 14, 09:45 UTC1h 15m
2026-06-13 LDX344C VIP → LBG Jun 13, 11:10 UTCJun 13, 12:10 UTC1h 0m
2026-06-12 LDX344 - Jun 12, 18:01 UTCJun 12, 18:55 UTC55m
2026-06-12 LDX344 - Jun 12, 15:20 UTCJun 12, 16:20 UTC1h 0m
2026-06-12 LDX344C - Jun 12, 12:50 UTCJun 12, 14:05 UTC1h 15m
2026-06-12 LDX344C - Jun 12, 09:10 UTCJun 12, 10:55 UTC1h 45m
2026-06-11 LDX344C - Jun 11, 18:00 UTCJun 11, 19:45 UTC1h 45m
2026-06-11 LDX344C VIP → PGF Jun 11, 16:15 UTCJun 11, 17:30 UTC1h 15m
2026-06-10 LDX344C - Jun 10, 08:20 UTCJun 10, 09:20 UTC1h 0m
2026-06-08 LDX344C - Jun 8, 08:05 UTCJun 8, 09:10 UTC1h 5m
2026-06-07 LDX344C - Jun 7, 08:05 UTCJun 7, 09:30 UTC1h 25m
2026-06-06 LDX344C LBG → CPH Jun 6, 08:15 UTCJun 6, 09:39 UTC1h 25m
2026-06-05 LDX344C NCE → LBG Jun 5, 15:15 UTCJun 5, 16:30 UTC1h 15m
2026-06-05 LDX344C - Jun 5, 11:50 UTCJun 5, 13:00 UTC1h 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-HPL page for operator, model, and routing details .

Mode-S 440637 frequently asked

What is Mode-S code 440637?
440637 is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-HPL.
Where is Mode-S 440637 registered?
Mode-S code 440637 is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 440637 broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 440637, octal 21003067, decimal 4,458,039.
What flights does 440637 operate?
Mode-S 440637 has broadcast 3 distinct callsigns, including LDX344C, LDX44PL, LDX344.