Apparatus

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sensors Mode-S transponder

440251

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-LRI · BOEING 747-400

Hex
440251
Octal
21001121
Decimal
4,457,041
Country
AT
Tail
OE-LRI
Type
B744
No current signal · last broadcast 9d ago
Flights observed
122
Distinct callsigns
20
Country
AT
Last broadcast
9d ago

Last known position

Most recent position reported by Mode-S 440251.

Country allocation

The ICAO 24-bit address 440251 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 20 distinct

Callsign Airline Flights Last seen
ICL850 - 11 2026-07-15
CHG562 AC Challenge Aero 8 2026-07-25
CHG561 AC Challenge Aero 8 2026-07-25
ICL902 CAL Cargo Air Lines 6 2026-06-06
ICL851 - 6 2026-07-15
CHG571 AC Challenge Aero 6 2026-07-26
ICL901 - 5 2026-06-27
ICL900 CAL Cargo Air Lines 5 2026-06-19
CHG572 AC Challenge Aero 5 2026-07-19
ICL853 - 4 2026-07-13
CHG542 AC Challenge Aero 4 2026-06-23
CHG278 - 4 2026-07-17
ICL909 - 3 2026-07-03
ICL908 CAL Cargo Air Lines 3 2026-07-01
CHG1562 AC Challenge Aero 3 2026-05-28
ICL913 CAL Cargo Air Lines 2 2026-05-22
ICL907 - 2 2026-05-20
ICL903 CAL Cargo Air Lines 2 2026-06-06
ICL849 - 2 2026-06-30
CHG541 AC Challenge Aero 2 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CHG571 LGG → IAH Jul 26, 08:05 UTCJul 26, 17:40 UTC9h 35m
2026-07-25 CHG562 ATL → LGG Jul 25, 20:45 UTCJul 26, 04:25 UTC7h 40m
2026-07-25 CHG561 LGG → ATL Jul 25, 08:55 UTCJul 25, 17:30 UTC8h 35m
2026-07-24 CHG503 DWC → LGG Jul 24, 19:45 UTCJul 24, 20:15 UTC30m
2026-07-24 CHG503 DWC → LGG Jul 24, 13:50 UTCJul 24, 17:45 UTC3h 55m
2026-07-23 ICL984 JFK → TLV Jul 23, 23:20 UTCJul 24, 08:45 UTC9h 25m
2026-07-23 ICL983 TLV → JFK Jul 23, 08:05 UTCJul 23, 19:10 UTC11h 5m
2026-07-22 ICL982 JFK → LGG Jul 22, 16:50 UTCJul 23, 02:30 UTC9h 40m
2026-07-22 ICL931 LGG → JFK Jul 22, 11:10 UTCJul 22, 12:30 UTC1h 20m
2026-07-21 CHG536 EWR → RZE Jul 21, 18:40 UTCJul 22, 01:30 UTC6h 50m
2026-07-21 CHG535 - Jul 21, 06:20 UTCJul 21, 13:35 UTC7h 15m
2026-07-20 CHG501 TLV → LGG Jul 20, 20:50 UTCJul 21, 00:55 UTC4h 5m
2026-07-20 CHG500 LGG → TLV Jul 20, 13:20 UTCJul 20, 17:10 UTC3h 50m
2026-07-19 CHG572 IAH → LGG Jul 19, 21:45 UTCJul 20, 06:50 UTC9h 5m
2026-07-19 CHG571 LGG → IAH Jul 19, 07:20 UTCJul 19, 17:30 UTC10h 10m
2026-07-18 CHG562 ATL → LGG Jul 18, 18:20 UTCJul 19, 02:15 UTC7h 55m
2026-07-18 CHG561 LGG → ATL Jul 18, 05:45 UTCJul 18, 14:40 UTC8h 55m
2026-07-17 CHG278 - Jul 17, 12:30 UTCJul 17, 16:59 UTC4h 30m
2026-07-15 CHG749 - Jul 15, 23:30 UTCJul 16, 01:30 UTC2h 0m
2026-07-15 ICL850 - Jul 15, 16:10 UTCJul 15, 19:10 UTC3h 0m
2026-07-15 ICL850 - Jul 15, 08:00 UTCJul 15, 14:35 UTC6h 35m
2026-07-15 ICL850 - Jul 15, 07:20 UTCJul 15, 07:30 UTC10m
2026-07-15 ICL851 - Jul 15, 02:30 UTCJul 15, 03:10 UTC40m
2026-07-14 ICL851 - Jul 14, 17:35 UTCJul 14, 19:35 UTC2h 0m
2026-07-14 CHG502 - Jul 14, 10:05 UTCJul 14, 14:15 UTC4h 10m
2026-07-14 CHG502 - Jul 14, 06:15 UTCJul 14, 07:50 UTC1h 35m
2026-07-13 ICL853 - Jul 13, 20:15 UTCJul 14, 00:15 UTC4h 0m
2026-07-13 CHG500 - Jul 13, 13:15 UTCJul 13, 17:05 UTC3h 50m
2026-07-13 CHG572 - Jul 13, 02:40 UTCJul 13, 08:10 UTC5h 30m
2026-07-12 CHG572 - Jul 12, 22:45 UTCJul 13, 02:35 UTC3h 50m
2026-07-12 CHG571 - Jul 12, 07:20 UTCJul 12, 16:50 UTC9h 30m
2026-07-11 CHG562 - Jul 11, 18:40 UTCJul 12, 02:25 UTC7h 45m
2026-07-11 CHG561 - Jul 11, 11:30 UTCJul 11, 14:30 UTC3h 0m
2026-07-11 CHG561 - Jul 11, 05:40 UTCJul 11, 11:25 UTC5h 45m
2026-07-09 CHG562 - Jul 9, 08:15 UTCJul 9, 16:10 UTC7h 55m
2026-07-07 CHG563 - Jul 7, 05:35 UTCJul 7, 14:15 UTC8h 40m
2026-07-05 CHG572 - Jul 5, 21:30 UTCJul 6, 06:15 UTC8h 45m
2026-07-05 CHG571 - Jul 5, 16:10 UTCJul 5, 17:10 UTC1h 0m
2026-07-05 CHG571 - Jul 5, 07:25 UTCJul 5, 16:05 UTC8h 40m
2026-07-04 CHG562 - Jul 4, 20:00 UTCJul 5, 03:50 UTC7h 50m
2026-07-04 CHG561 - Jul 4, 06:55 UTCJul 4, 15:50 UTC8h 55m
2026-07-03 ICL909 - Jul 3, 15:55 UTCJul 3, 20:10 UTC4h 15m
2026-07-02 ICL862 CRK → TLV Jul 2, 23:35 UTCJul 3, 11:45 UTC12h 10m
2026-07-01 ICL861 - Jul 1, 20:30 UTCJul 2, 07:20 UTC10h 50m
2026-07-01 ICL908 LGG → LJU Jul 1, 12:15 UTCJul 1, 16:20 UTC4h 5m
2026-06-30 ICL857 - Jun 30, 23:25 UTCJul 1, 03:15 UTC3h 50m
2026-06-30 ICL850 - Jun 30, 17:10 UTCJun 30, 20:10 UTC3h 0m
2026-06-30 ICL850 - Jun 30, 08:40 UTCJun 30, 15:00 UTC6h 20m
2026-06-30 ICL850 - Jun 30, 07:45 UTCJun 30, 08:00 UTC15m
2026-06-30 ICL849 - Jun 30, 01:04 UTCJun 30, 04:40 UTC3h 36m

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

Mode-S 440251 frequently asked

What is Mode-S code 440251?
440251 is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-LRI.
Where is Mode-S 440251 registered?
Mode-S code 440251 is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 440251 broadcasting right now?
No active broadcast right now. Last signal was 9d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 440251, octal 21001121, decimal 4,457,041.
What flights does 440251 operate?
Mode-S 440251 has broadcast 20 distinct callsigns, including ICL850, CHG562, CHG561, ICL902, ICL851.