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sensors Mode-S transponder

44CD63

ICAO 24-bit transponder address · allocated to Belgium

Currently assigned to OO-SKC

Hex
44CD63
Octal
21146543
Decimal
4,509,027
Country
BE
Tail
OO-SKC
Type
DA40
No current signal · last broadcast Jul 22, 13:15 UTC
Flights observed
216
Distinct callsigns
10
Country
BE
Last broadcast
Jul 22, 13:15 UTC

Last known position

Most recent position reported by Mode-S 44CD63.

Country allocation

The ICAO 24-bit address 44CD63 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 10 distinct

Callsign Airline Flights Last seen
OOSKC - 186 2026-07-22
OOSKC2S - 8 2026-07-19
OOSKC1S - 7 2026-07-19
OOSKC3S - 4 2026-07-17
OOSKC3 - 3 2026-07-12
OOSKC4S - 2 2026-07-16
OOSKC2 - 2 2026-07-13
OOSKC1 - 2 2026-07-13
OOSKC5 - 1 2026-07-12
OOSKC4 - 1 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 OOSKC - Jul 22, 11:35 UTCJul 22, 13:15 UTC1h 40m
2026-07-19 OOSKC2S - Jul 19, 14:00 UTCJul 19, 15:35 UTC1h 35m
2026-07-19 OOSKC1S - Jul 19, 10:15 UTCJul 19, 11:05 UTC50m
2026-07-17 OOSKC3S - Jul 17, 15:55 UTCJul 17, 17:15 UTC1h 20m
2026-07-17 OOSKC2S - Jul 17, 13:50 UTCJul 17, 15:20 UTC1h 30m
2026-07-17 OOSKC2S - Jul 17, 12:55 UTCJul 17, 13:15 UTC20m
2026-07-17 OOSKC1S - Jul 17, 11:00 UTCJul 17, 12:00 UTC1h 0m
2026-07-16 OOSKC4S - Jul 16, 15:45 UTCJul 16, 16:44 UTC1h 0m
2026-07-16 OOSKC3S - Jul 16, 13:05 UTCJul 16, 14:05 UTC1h 0m
2026-07-16 OOSKC2S - Jul 16, 10:04 UTCJul 16, 11:15 UTC1h 10m
2026-07-16 OOSKC1S - Jul 16, 06:55 UTCJul 16, 08:15 UTC1h 20m
2026-07-15 OOSKC3S - Jul 15, 14:40 UTCJul 15, 15:45 UTC1h 5m
2026-07-15 OOSKC2S - Jul 15, 12:55 UTCJul 15, 13:50 UTC55m
2026-07-15 OOSKC2S - Jul 15, 12:25 UTCJul 15, 12:45 UTC20m
2026-07-15 OOSKC1S - Jul 15, 09:35 UTCJul 15, 10:40 UTC1h 5m
2026-07-14 OOSKC1S - Jul 14, 12:20 UTCJul 14, 13:15 UTC55m
2026-07-13 OOSKC2 - Jul 13, 12:05 UTCJul 13, 13:05 UTC1h 0m
2026-07-13 OOSKC1 - Jul 13, 10:25 UTCJul 13, 11:20 UTC55m
2026-07-12 OOSKC5 - Jul 12, 15:25 UTCJul 12, 15:55 UTC30m
2026-07-12 OOSKC4 - Jul 12, 13:45 UTCJul 12, 14:20 UTC35m
2026-07-12 OOSKC3 - Jul 12, 12:05 UTCJul 12, 12:45 UTC40m
2026-07-12 OOSKC2S - Jul 12, 11:01 UTCJul 12, 11:15 UTC15m
2026-07-12 OOSKC1S - Jul 12, 07:40 UTCJul 12, 09:05 UTC1h 25m
2026-07-11 OOSKC3 - Jul 11, 16:00 UTCJul 11, 17:05 UTC1h 5m
2026-07-11 OOSKC2 - Jul 11, 14:40 UTCJul 11, 15:25 UTC45m
2026-07-11 OOSKC1 - Jul 11, 07:55 UTCJul 11, 09:00 UTC1h 5m
2026-07-10 OOSKC4S - Jul 10, 15:50 UTCJul 10, 17:00 UTC1h 10m
2026-07-10 OOSKC3S - Jul 10, 12:55 UTCJul 10, 13:50 UTC55m
2026-07-10 OOSKC2S - Jul 10, 10:30 UTCJul 10, 11:30 UTC1h 0m
2026-07-10 OOSKC1S - Jul 10, 08:20 UTCJul 10, 09:10 UTC50m
2026-07-09 OOSKC3 - Jul 9, 14:00 UTCJul 9, 15:00 UTC1h 0m
2026-07-09 OOSKC - Jul 9, 10:35 UTCJul 9, 11:20 UTC45m
2026-07-09 OOSKC - Jul 9, 08:50 UTCJul 9, 09:45 UTC55m
2026-07-08 OOSKC - Jul 8, 17:25 UTCJul 8, 18:10 UTC45m
2026-07-08 OOSKC - Jul 8, 15:55 UTCJul 8, 16:10 UTC15m
2026-07-08 OOSKC - Jul 8, 14:50 UTCJul 8, 15:05 UTC15m
2026-07-08 OOSKC - Jul 8, 08:45 UTCJul 8, 10:30 UTC1h 45m
2026-07-07 OOSKC - Jul 7, 12:30 UTCJul 7, 15:05 UTC2h 35m
2026-07-07 OOSKC ANR → BYF Jul 7, 08:35 UTCJul 7, 10:15 UTC1h 40m
2026-07-06 OOSKC - Jul 6, 13:30 UTCJul 6, 14:40 UTC1h 10m
2026-07-06 OOSKC - Jul 6, 12:05 UTCJul 6, 13:05 UTC1h 0m
2026-07-06 OOSKC - Jul 6, 10:20 UTCJul 6, 11:20 UTC1h 0m
2026-07-06 OOSKC - Jul 6, 07:55 UTCJul 6, 09:10 UTC1h 15m
2026-07-06 OOSKC ANR → ANR Jul 6, 06:15 UTCJul 6, 07:10 UTC55m
2026-07-04 OOSKC ANR → ANR Jul 4, 13:40 UTCJul 4, 14:50 UTC1h 10m
2026-07-04 OOSKC - Jul 4, 10:25 UTCJul 4, 11:40 UTC1h 15m
2026-07-04 OOSKC ANR → ANR Jul 4, 08:25 UTCJul 4, 09:45 UTC1h 20m
2026-07-03 OOSKC - Jul 3, 13:45 UTCJul 3, 14:35 UTC50m
2026-07-03 OOSKC - Jul 3, 11:40 UTCJul 3, 12:45 UTC1h 5m
2026-07-03 OOSKC - Jul 3, 09:10 UTCJul 3, 10:00 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-SKC page for operator, model, and routing details .

Mode-S 44CD63 frequently asked

What is Mode-S code 44CD63?
44CD63 is an ICAO 24-bit transponder address. Allocated to Belgium. Assigned to OO-SKC.
Where is Mode-S 44CD63 registered?
Mode-S code 44CD63 is allocated to Belgium (BE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 44CD63 broadcasting right now?
No active broadcast right now. Last signal was Jul 22, 13:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 44CD63, octal 21146543, decimal 4,509,027.
What flights does 44CD63 operate?
Mode-S 44CD63 has broadcast 10 distinct callsigns, including OOSKC, OOSKC2S, OOSKC1S, OOSKC3S, OOSKC3.