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sensors Mode-S transponder

44D901

ICAO 24-bit transponder address · allocated to Belgium

Currently assigned to OO-VHA · AEROSPATIALE AS-350 Ecureuil

Hex
44D901
Octal
21154401
Decimal
4,512,001
Country
BE
Tail
OO-VHA
Type
AS50
No current signal · last broadcast 1d ago
Flights observed
74
Distinct callsigns
1
Country
BE
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 44D901.

Country allocation

The ICAO 24-bit address 44D901 falls within the block assigned to Belgium (BE) by ICAO Annex 10, Volume III. Every aircraft registered in Belgium 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
OOVHA - 74 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 OOVHA - Jul 17, 12:30 UTCJul 17, 13:20 UTC50m
2026-07-11 OOVHA - Jul 11, 11:05 UTCJul 11, 12:35 UTC1h 30m
2026-07-11 OOVHA - Jul 11, 08:40 UTCJul 11, 09:15 UTC35m
2026-07-10 OOVHA - Jul 10, 17:15 UTCJul 10, 17:35 UTC20m
2026-07-10 OOVHA - Jul 10, 07:25 UTCJul 10, 08:35 UTC1h 10m
2026-07-08 OOVHA - Jul 8, 13:00 UTCJul 8, 14:20 UTC1h 20m
2026-07-08 OOVHA - Jul 8, 09:05 UTCJul 8, 09:15 UTC10m
2026-07-06 OOVHA - Jul 6, 16:45 UTCJul 6, 17:00 UTC15m
2026-07-06 OOVHA - Jul 6, 14:45 UTCJul 6, 16:05 UTC1h 20m
2026-07-05 OOVHA - Jul 5, 15:40 UTCJul 5, 18:50 UTC3h 10m
2026-07-05 OOVHA - Jul 5, 14:05 UTCJul 5, 14:55 UTC50m
2026-07-05 OOVHA - Jul 5, 09:20 UTCJul 5, 10:00 UTC40m
2026-07-04 OOVHA KJK → KJK Jul 4, 15:55 UTCJul 4, 18:50 UTC2h 55m
2026-07-04 OOVHA - Jul 4, 13:30 UTCJul 4, 14:25 UTC55m
2026-07-04 OOVHA - Jul 4, 11:45 UTCJul 4, 12:55 UTC1h 10m
2026-07-04 OOVHA - Jul 4, 07:55 UTCJul 4, 08:50 UTC55m
2026-07-03 OOVHA - Jul 3, 12:05 UTCJul 3, 12:50 UTC45m
2026-07-02 OOVHA - Jul 2, 16:25 UTCJul 2, 17:20 UTC55m
2026-07-02 OOVHA - Jul 2, 08:45 UTCJul 2, 09:30 UTC45m
2026-06-28 OOVHA - Jun 28, 10:19 UTCJun 28, 11:35 UTC1h 15m
2026-06-28 OOVHA - Jun 28, 07:50 UTCJun 28, 08:34 UTC45m
2026-06-27 OOVHA - Jun 27, 16:59 UTCJun 27, 18:45 UTC1h 45m
2026-06-27 OOVHA - Jun 27, 10:10 UTCJun 27, 11:25 UTC1h 15m
2026-06-27 OOVHA - Jun 27, 09:19 UTCJun 27, 09:29 UTC10m
2026-06-26 OOVHA KJK → KJK Jun 26, 09:14 UTCJun 26, 10:25 UTC1h 10m
2026-06-25 OOVHA KJK → KJK Jun 25, 11:25 UTCJun 25, 12:50 UTC1h 25m
2026-06-25 OOVHA KJK → KJK Jun 25, 09:34 UTCJun 25, 10:20 UTC45m
2026-06-24 OOVHA - Jun 24, 11:50 UTCJun 24, 12:44 UTC55m
2026-06-24 OOVHA - Jun 24, 09:49 UTCJun 24, 11:05 UTC1h 15m
2026-06-23 OOVHA - Jun 23, 16:24 UTCJun 23, 17:15 UTC50m
2026-06-23 OOVHA - Jun 23, 10:49 UTCJun 23, 13:50 UTC3h 0m
2026-06-19 OOVHA KJK → KJK Jun 19, 10:19 UTCJun 19, 11:24 UTC1h 5m
2026-06-15 OOVHA - Jun 15, 11:54 UTCJun 15, 13:20 UTC1h 25m
2026-06-14 OOVHA KJK → KJK Jun 14, 09:40 UTCJun 14, 12:10 UTC2h 30m
2026-06-13 OOVHA - Jun 13, 15:00 UTCJun 13, 15:10 UTC10m
2026-06-13 OOVHA - Jun 13, 13:55 UTCJun 13, 14:15 UTC20m
2026-06-13 OOVHA - Jun 13, 12:35 UTCJun 13, 13:15 UTC40m
2026-06-13 OOVHA - Jun 13, 11:00 UTCJun 13, 11:50 UTC50m
2026-06-11 OOVHA KJK → KJK Jun 11, 12:25 UTCJun 11, 13:30 UTC1h 5m
2026-06-11 OOVHA - Jun 11, 09:10 UTCJun 11, 10:15 UTC1h 5m
2026-06-11 OOVHA - Jun 11, 08:00 UTCJun 11, 08:40 UTC40m
2026-06-11 OOVHA KJK → ANR Jun 11, 06:35 UTCJun 11, 07:05 UTC30m
2026-06-09 OOVHA - Jun 9, 11:35 UTCJun 9, 14:50 UTC3h 15m
2026-06-09 OOVHA - Jun 9, 07:25 UTCJun 9, 07:35 UTC10m
2026-06-08 OOVHA - Jun 8, 13:20 UTCJun 8, 14:45 UTC1h 25m
2026-06-08 OOVHA - Jun 8, 11:40 UTCJun 8, 11:50 UTC10m
2026-06-07 OOVHA - Jun 7, 16:15 UTCJun 7, 16:35 UTC20m
2026-06-07 OOVHA - Jun 7, 13:20 UTCJun 7, 13:35 UTC15m
2026-06-06 OOVHA - Jun 6, 13:15 UTCJun 6, 15:39 UTC2h 25m
2026-06-04 OOVHA - Jun 4, 07:35 UTCJun 4, 08:25 UTC50m

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 OO-VHA page for operator, model, and routing details .

Mode-S 44D901 frequently asked

What is Mode-S code 44D901?
44D901 is an ICAO 24-bit transponder address. Allocated to Belgium. Assigned to OO-VHA.
Where is Mode-S 44D901 registered?
Mode-S code 44D901 is allocated to Belgium (BE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 44D901 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 44D901, octal 21154401, decimal 4,512,001.
What flights does 44D901 operate?
Mode-S 44D901 has broadcast 1 distinct callsign, including OOVHA.