Apparatus

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sensors Mode-S transponder

44CDC9

ICAO 24-bit transponder address · allocated to Belgium

Currently assigned to OO-SNI · AIRBUS A-320

Hex
44CDC9
Octal
21146711
Decimal
4,509,129
Country
BE
Tail
OO-SNI
Type
A320
No current signal · last broadcast 4h ago
Flights observed
264
Distinct callsigns
20
Country
BE
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 44CDC9.

Country allocation

The ICAO 24-bit address 44CDC9 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 20 distinct

Callsign Airline Flights Last seen
BEL5UC Brussels Airlines 5 2026-05-09
BEL2HV Brussels Airlines 5 2026-05-09
BEL9PW Brussels Airlines 4 2026-05-27
BEL9KT Brussels Airlines 4 2026-05-27
BEL9HR Brussels Airlines 4 2026-05-11
BEL8NV Brussels Airlines 4 2026-05-27
BEL8CZ Brussels Airlines 4 2026-05-21
BEL8CE Brussels Airlines 4 2026-05-05
BEL76T Brussels Airlines 4 2026-05-15
BEL74C Brussels Airlines 4 2026-05-25
BEL6TC Brussels Airlines 4 2026-05-23
BEL6NY Brussels Airlines 4 2026-05-21
BEL4WF Brussels Airlines 4 2026-05-29
BEL4VL Brussels Airlines 4 2026-05-27
BEL4RE Brussels Airlines 4 2026-04-21
BEL3ZY Brussels Airlines 4 2026-05-23
BEL29D Brussels Airlines 4 2026-05-14
BEL1UF Brussels Airlines 4 2026-05-11
BEL9WV Brussels Airlines 3 2026-05-25
BEL9QH Brussels Airlines 3 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 BEL3TX BRU → HAM May 29, 19:20 UTCMay 29, 20:10 UTC50m
2026-05-29 BEL4WF BUD → BRU May 29, 16:30 UTCMay 29, 18:10 UTC1h 40m
2026-05-29 BEL6PR BRU → BUD May 29, 13:35 UTCMay 29, 15:20 UTC1h 45m
2026-05-29 BEL5BM BUD → BRU May 29, 10:25 UTCMay 29, 12:05 UTC1h 40m
2026-05-29 BEL2EU BRU → BUD May 29, 07:40 UTCMay 29, 09:20 UTC1h 40m
2026-05-29 BEL8CL BRU → KGS May 29, 05:15 UTCMay 29, 06:05 UTC50m
2026-05-28 BEL3TX BRU → HAM May 28, 19:10 UTCMay 28, 20:05 UTC55m
2026-05-28 BEL2ZH ARN → BRU May 28, 16:00 UTCMay 28, 17:50 UTC1h 50m
2026-05-28 BEL4BP BRU → ARN May 28, 12:55 UTCMay 28, 14:45 UTC1h 50m
2026-05-28 BEL4KY FRA → BRU May 28, 11:05 UTCMay 28, 11:45 UTC40m
2026-05-28 BEL3DQ BRU → FRA May 28, 09:00 UTCMay 28, 09:35 UTC35m
2026-05-28 BEL7NL GVA → BRU May 28, 06:35 UTCMay 28, 07:40 UTC1h 5m
2026-05-28 BEL8LT ALC → BRU May 28, 04:40 UTCMay 28, 05:40 UTC1h 0m
2026-05-27 BEL4VL PMI → BRU May 27, 19:00 UTCMay 27, 20:50 UTC1h 50m
2026-05-27 BEL9KT BRU → BHX May 27, 15:40 UTCMay 27, 17:40 UTC2h 0m
2026-05-27 BEL9SW MUC → BRU May 27, 13:10 UTCMay 27, 14:15 UTC1h 5m
2026-05-27 BEL7LF BRU → MUC May 27, 10:50 UTCMay 27, 11:55 UTC1h 5m
2026-05-27 BEL9PW ALC → BRU May 27, 07:40 UTCMay 27, 09:35 UTC1h 55m
2026-05-27 BEL8NV BRU → ALC May 27, 04:04 UTCMay 27, 06:15 UTC2h 10m
2026-05-26 BEL6HB TFS → BRU May 26, 17:39 UTCMay 26, 21:29 UTC3h 50m
2026-05-26 BEL7QJ BRU → TFS May 26, 12:00 UTCMay 26, 15:54 UTC3h 55m
2026-05-26 BEL9EL FCO → BRU May 26, 08:45 UTCMay 26, 10:29 UTC1h 45m
2026-05-26 BEL1YC BRU → FCO May 26, 05:25 UTCMay 26, 07:10 UTC1h 45m
2026-05-25 BEL9WV VIE → BRU May 25, 19:40 UTCMay 25, 20:59 UTC1h 20m
2026-05-25 BEL7VN BRU → VIE May 25, 17:00 UTCMay 25, 18:25 UTC1h 25m
2026-05-25 BEL74C BCN → BRU May 25, 14:15 UTCMay 25, 15:50 UTC1h 35m
2026-05-25 BEL9QH BRU → BCN May 25, 10:55 UTCMay 25, 12:40 UTC1h 45m
2026-05-25 BEL9DN FRA → BRU May 25, 07:20 UTCMay 25, 08:05 UTC45m
2026-05-25 BEL8QB BRU → FRA May 25, 05:20 UTCMay 25, 05:55 UTC35m
2026-05-24 BEL7JN BCN → BRU May 24, 20:10 UTCMay 24, 21:50 UTC1h 40m
2026-05-24 BEL3FJ BRU → BCN May 24, 17:20 UTCMay 24, 18:55 UTC1h 35m
2026-05-24 BEL74C BCN → BRU May 24, 14:05 UTCMay 24, 15:45 UTC1h 40m
2026-05-24 BEL9QH BRU → BCN May 24, 10:55 UTCMay 24, 12:30 UTC1h 35m
2026-05-24 BEL9DN FRA → BRU May 24, 08:30 UTCMay 24, 09:15 UTC45m
2026-05-24 BEL8QB BRU → FRA May 24, 05:35 UTCMay 24, 06:10 UTC35m
2026-05-23 BEL6BM BIO → BRU May 23, 15:00 UTCMay 23, 21:20 UTC6h 20m
2026-05-23 BEL6HF NCE → BRU May 23, 12:05 UTCMay 23, 13:25 UTC1h 20m
2026-05-23 BEL5CG BRU → NCE May 23, 09:25 UTCMay 23, 10:50 UTC1h 25m
2026-05-23 BEL6TC CDG → BRU May 23, 06:50 UTCMay 23, 07:20 UTC30m
2026-05-23 BEL3ZY BRU → CDG May 23, 05:05 UTCMay 23, 05:40 UTC35m
2026-05-22 BEL72R GVA → BRU May 22, 19:35 UTCMay 22, 20:25 UTC50m
2026-05-22 BEL4GV BRU → GVA May 22, 17:35 UTCMay 22, 18:30 UTC55m
2026-05-22 BEL2CA GVA → BRU May 22, 15:35 UTCMay 22, 16:25 UTC50m
2026-05-22 BEL9SE BRU → GVA May 22, 13:15 UTCMay 22, 14:15 UTC1h 0m
2026-05-22 BEL4UG TLS → BRU May 22, 10:30 UTCMay 22, 11:45 UTC1h 15m
2026-05-22 BEL8WD BRU → TLS May 22, 08:10 UTCMay 22, 09:20 UTC1h 10m
2026-05-22 BEL8CL BRU → KGS May 22, 05:25 UTCMay 22, 06:15 UTC50m
2026-05-21 BEL3TX BRU → HAM May 21, 19:15 UTCMay 21, 20:10 UTC55m
2026-05-21 BEL1PA VLC → BRU May 21, 15:45 UTCMay 21, 17:35 UTC1h 50m
2026-05-21 BEL7JV BRU → VLC May 21, 12:45 UTCMay 21, 14:40 UTC1h 55m

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

Mode-S 44CDC9 frequently asked

What is Mode-S code 44CDC9?
44CDC9 is an ICAO 24-bit transponder address. Allocated to Belgium. Assigned to OO-SNI.
Where is Mode-S 44CDC9 registered?
Mode-S code 44CDC9 is allocated to Belgium (BE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 44CDC9 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 44CDC9, octal 21146711, decimal 4,509,129.
What flights does 44CDC9 operate?
Mode-S 44CDC9 has broadcast 20 distinct callsigns, including BEL5UC, BEL2HV, BEL9PW, BEL9KT, BEL9HR.