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sensors Mode-S transponder

44CD61

ICAO 24-bit transponder address · allocated to Belgium

Currently assigned to OO-SKA

Hex
44CD61
Octal
21146541
Decimal
4,509,025
Country
BE
Tail
OO-SKA
Type
DA40
No current signal · last broadcast 22h ago
Flights observed
145
Distinct callsigns
11
Country
BE
Last broadcast
22h ago

Last known position

Most recent position reported by Mode-S 44CD61.

Country allocation

The ICAO 24-bit address 44CD61 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 11 distinct

Callsign Airline Flights Last seen
OOSKA - 33 2026-06-03
OOSKA1 - 28 2026-07-17
OOSKA2 - 21 2026-07-20
OOSKA3 - 17 2026-07-20
OOSKA2S - 14 2026-07-26
OOSKA1S - 11 2026-07-26
OOSKA3S - 9 2026-07-26
OOSKA4 - 7 2026-07-12
OOSKA5 - 2 2026-06-26
OOSKA4S - 2 2026-07-26
OOSKBA2 - 1 2026-06-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 OOSKA4S - Jul 26, 16:55 UTCJul 26, 17:20 UTC25m
2026-07-26 OOSKA3S - Jul 26, 14:25 UTCJul 26, 15:10 UTC45m
2026-07-26 OOSKA2S - Jul 26, 11:25 UTCJul 26, 13:20 UTC1h 55m
2026-07-26 OOSKA1S - Jul 26, 08:00 UTCJul 26, 09:25 UTC1h 25m
2026-07-25 OOSKA3S - Jul 25, 14:55 UTCJul 25, 15:35 UTC40m
2026-07-25 OOSKA2S - Jul 25, 11:20 UTCJul 25, 12:40 UTC1h 20m
2026-07-25 OOSKA1S - Jul 25, 08:10 UTCJul 25, 09:25 UTC1h 15m
2026-07-24 OOSKA3S - Jul 24, 14:15 UTCJul 24, 14:35 UTC20m
2026-07-24 OOSKA3S - Jul 24, 12:55 UTCJul 24, 13:20 UTC25m
2026-07-24 OOSKA2S - Jul 24, 10:20 UTCJul 24, 11:10 UTC50m
2026-07-24 OOSKA1S - Jul 24, 08:20 UTCJul 24, 09:20 UTC1h 0m
2026-07-23 OOSKA3S - Jul 23, 16:10 UTCJul 23, 16:45 UTC35m
2026-07-23 OOSKA3S - Jul 23, 14:45 UTCJul 23, 15:10 UTC25m
2026-07-23 OOSKA2S - Jul 23, 11:30 UTCJul 23, 13:10 UTC1h 40m
2026-07-23 OOSKA1S - Jul 23, 09:35 UTCJul 23, 09:50 UTC15m
2026-07-23 OOSKA1S - Jul 23, 08:15 UTCJul 23, 09:00 UTC45m
2026-07-22 OOSKA4S - Jul 22, 16:30 UTCJul 22, 17:20 UTC50m
2026-07-22 OOSKA3S - Jul 22, 15:15 UTCJul 22, 15:55 UTC40m
2026-07-22 OOSKA2S - Jul 22, 11:15 UTCJul 22, 12:40 UTC1h 25m
2026-07-21 OOSKA2S - Jul 21, 14:50 UTCJul 21, 15:35 UTC45m
2026-07-21 OOSKA1S - Jul 21, 12:50 UTCJul 21, 13:30 UTC40m
2026-07-20 OOSKA3 - Jul 20, 12:20 UTCJul 20, 13:05 UTC45m
2026-07-20 OOSKA2 - Jul 20, 09:00 UTCJul 20, 10:05 UTC1h 5m
2026-07-19 OOSKA2S - Jul 19, 13:50 UTCJul 19, 15:45 UTC1h 55m
2026-07-19 OOSKA1S - Jul 19, 10:20 UTCJul 19, 11:40 UTC1h 20m
2026-07-17 OOSKA3S - Jul 17, 15:40 UTCJul 17, 16:49 UTC1h 10m
2026-07-17 OOSKA2S - Jul 17, 13:15 UTCJul 17, 14:00 UTC45m
2026-07-17 OOSKA1 - Jul 17, 11:00 UTCJul 17, 12:04 UTC1h 5m
2026-07-16 OOSKA3S - Jul 16, 13:15 UTCJul 16, 14:05 UTC50m
2026-07-16 OOSKA2S - Jul 16, 12:14 UTCJul 16, 12:30 UTC15m
2026-07-16 OOSKA2S - Jul 16, 10:25 UTCJul 16, 11:40 UTC1h 15m
2026-07-16 OOSKA1S - Jul 16, 07:05 UTCJul 16, 08:40 UTC1h 35m
2026-07-15 OOSKA3 - Jul 15, 14:35 UTCJul 15, 16:45 UTC2h 10m
2026-07-15 OOSKA2S - Jul 15, 12:20 UTCJul 15, 13:15 UTC55m
2026-07-15 OOSKA1S - Jul 15, 09:40 UTCJul 15, 10:45 UTC1h 5m
2026-07-14 OOSKA3 - Jul 14, 15:45 UTCJul 14, 16:10 UTC25m
2026-07-14 OOSKA2 - Jul 14, 13:05 UTCJul 14, 14:15 UTC1h 10m
2026-07-14 OOSKA1 - Jul 14, 10:45 UTCJul 14, 11:45 UTC1h 0m
2026-07-13 OOSKA3 - Jul 13, 15:35 UTCJul 13, 16:15 UTC40m
2026-07-13 OOSKA2 - Jul 13, 11:45 UTCJul 13, 13:15 UTC1h 30m
2026-07-13 OOSKA1 - Jul 13, 07:45 UTCJul 13, 09:10 UTC1h 25m
2026-07-12 OOSKA4 - Jul 12, 16:10 UTCJul 12, 17:05 UTC55m
2026-07-12 OOSKA3 - Jul 12, 13:45 UTCJul 12, 15:01 UTC1h 15m
2026-07-12 OOSKA2 - Jul 12, 11:40 UTCJul 12, 12:45 UTC1h 5m
2026-07-12 OOSKA1 - Jul 12, 07:40 UTCJul 12, 09:10 UTC1h 30m
2026-07-11 OOSKA4 - Jul 11, 14:45 UTCJul 11, 15:40 UTC55m
2026-07-11 OOSKA3 - Jul 11, 11:45 UTCJul 11, 12:35 UTC50m
2026-07-11 OOSKA1S - Jul 11, 07:40 UTCJul 11, 10:10 UTC2h 30m
2026-07-10 OOSKA4 - Jul 10, 14:35 UTCJul 10, 15:25 UTC50m
2026-07-10 OOSKA3 - Jul 10, 13:05 UTCJul 10, 13:55 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-SKA page for operator, model, and routing details .

Mode-S 44CD61 frequently asked

What is Mode-S code 44CD61?
44CD61 is an ICAO 24-bit transponder address. Allocated to Belgium. Assigned to OO-SKA.
Where is Mode-S 44CD61 registered?
Mode-S code 44CD61 is allocated to Belgium (BE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 44CD61 broadcasting right now?
No active broadcast right now. Last signal was 22h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 44CD61, octal 21146541, decimal 4,509,025.
What flights does 44CD61 operate?
Mode-S 44CD61 has broadcast 11 distinct callsigns, including OOSKA, OOSKA1, OOSKA2, OOSKA3, OOSKA2S.