Apparatus

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sensors Mode-S transponder

44CDD1

ICAO 24-bit transponder address · allocated to Belgium

Currently assigned to OO-SNQ · AIRBUS A-320

Hex
44CDD1
Octal
21146721
Decimal
4,509,137
Country
BE
Tail
OO-SNQ
Type
A320
No current signal · last broadcast 4h ago
Flights observed
393
Distinct callsigns
20
Country
BE
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 44CDD1.

Country allocation

The ICAO 24-bit address 44CDD1 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
BEL5AU - 8 2026-06-27
BEL6VP - 7 2026-07-07
BEL1EW - 7 2026-06-26
BEL1EV - 7 2026-07-07
BEL9FU - 6 2026-07-10
BEL9EV Brussels Airlines 6 2026-07-06
BEL5KF - 6 2026-06-24
BEL5GR - 6 2026-07-10
BEL4UT Brussels Airlines 6 2026-06-24
BEL3CQ - 6 2026-07-06
BEL9PW - 5 2026-06-25
BEL7LW Brussels Airlines 5 2026-06-12
BEL3CP Brussels Airlines 5 2026-06-12
BEL9UR - 4 2026-07-12
BEL9KU - 4 2026-07-12
BEL7QJ - 4 2026-07-11
BEL6HB - 4 2026-07-11
BEL5PR - 4 2026-06-28
BEL5DP Brussels Airlines 4 2026-06-25
BEL4RE - 4 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 BEL2LZ BRU → BCN Jul 13, 19:05 UTCJul 13, 20:55 UTC1h 50m
2026-07-13 BEL2CA - Jul 13, 16:55 UTCJul 13, 17:55 UTC1h 0m
2026-07-13 BEL9SE BRU → GVA Jul 13, 13:45 UTCJul 13, 14:50 UTC1h 5m
2026-07-13 BEL47P PRG → BRU Jul 13, 10:10 UTCJul 13, 11:20 UTC1h 10m
2026-07-13 BEL2NM BRU → PRG Jul 13, 08:10 UTCJul 13, 09:15 UTC1h 5m
2026-07-13 BEL9HZ MAN → BRU Jul 13, 05:45 UTCJul 13, 06:35 UTC50m
2026-07-12 BEL5BJ BRU → MAN Jul 12, 20:05 UTCJul 12, 21:00 UTC55m
2026-07-12 BEL1BT LIN → BRU Jul 12, 17:25 UTCJul 12, 18:40 UTC1h 15m
2026-07-12 BEL6ZH BRU → LIN Jul 12, 14:55 UTCJul 12, 15:55 UTC1h 0m
2026-07-12 BEL9UR - Jul 12, 11:55 UTCJul 12, 13:15 UTC1h 20m
2026-07-12 BEL9KU - Jul 12, 09:25 UTCJul 12, 10:45 UTC1h 20m
2026-07-12 BEL9DN - Jul 12, 07:05 UTCJul 12, 07:40 UTC35m
2026-07-12 BEL8QB BRU → FRA Jul 12, 05:05 UTCJul 12, 05:40 UTC35m
2026-07-11 BEL6HB - Jul 11, 18:05 UTCJul 11, 21:30 UTC3h 25m
2026-07-11 BEL7QJ - Jul 11, 12:30 UTCJul 11, 16:25 UTC3h 55m
2026-07-11 BEL4LZ - Jul 11, 09:05 UTCJul 11, 09:45 UTC40m
2026-07-11 BEL8ZB BRU → FRA Jul 11, 06:55 UTCJul 11, 07:30 UTC35m
2026-07-10 BEL7DM - Jul 10, 17:40 UTCJul 10, 20:50 UTC3h 10m
2026-07-10 BEL9JR - Jul 10, 13:20 UTCJul 10, 16:05 UTC2h 45m
2026-07-10 BEL9FU MUC → BRU Jul 10, 10:10 UTCJul 10, 11:10 UTC1h 0m
2026-07-10 BEL5GR BRU → MUC Jul 10, 07:55 UTCJul 10, 08:50 UTC55m
2026-07-10 BEL7ZC GVA → BRU Jul 10, 05:35 UTCJul 10, 06:45 UTC1h 10m
2026-07-09 BEL92K BRU → GVA Jul 9, 19:15 UTCJul 9, 20:15 UTC1h 0m
2026-07-09 BEL2ZH ARN → BRU Jul 9, 16:15 UTCJul 9, 18:00 UTC1h 45m
2026-07-09 BEL4BP BRU → ARN Jul 9, 13:00 UTCJul 9, 14:50 UTC1h 50m
2026-07-09 BEL1LH LHR → BRU Jul 9, 10:30 UTCJul 9, 11:15 UTC45m
2026-07-09 BEL2AH BRU → LHR Jul 9, 08:20 UTCJul 9, 09:10 UTC50m
2026-07-09 BEL5PQ LHR → BRU Jul 9, 06:00 UTCJul 9, 06:45 UTC45m
2026-07-08 BEL4AH - Jul 8, 19:40 UTCJul 8, 20:20 UTC40m
2026-07-08 BEL2UE - Jul 8, 15:55 UTCJul 8, 17:50 UTC1h 55m
2026-07-08 BEL3KK BRU → MAD Jul 8, 12:40 UTCJul 8, 14:30 UTC1h 50m
2026-07-08 BEL4MR MIR → BRU Jul 8, 08:00 UTCJul 8, 10:25 UTC2h 25m
2026-07-08 BEL5TR BRU → MIR Jul 8, 04:20 UTCJul 8, 06:35 UTC2h 15m
2026-07-07 BEL8LD RHO → BRU Jul 7, 17:35 UTCJul 7, 21:00 UTC3h 25m
2026-07-07 BEL3UF BRU → RHO Jul 7, 13:30 UTCJul 7, 16:30 UTC3h 0m
2026-07-07 BEL1EV - Jul 7, 10:45 UTCJul 7, 12:10 UTC1h 25m
2026-07-07 BEL6VP - Jul 7, 08:15 UTCJul 7, 09:25 UTC1h 10m
2026-07-07 BEL19V VCE → BRU Jul 7, 05:10 UTCJul 7, 06:35 UTC1h 25m
2026-07-06 BEL2SJ - Jul 6, 20:25 UTCJul 6, 21:30 UTC1h 5m
2026-07-06 BEL3CQ - Jul 6, 17:45 UTCJul 6, 18:40 UTC55m
2026-07-06 BEL9EV BRU → MUC Jul 6, 15:25 UTCJul 6, 16:30 UTC1h 5m
2026-07-06 BEL5UC - Jul 6, 11:45 UTCJul 6, 13:40 UTC1h 55m
2026-07-06 BEL2HV - Jul 6, 08:15 UTCJul 6, 10:00 UTC1h 45m
2026-07-06 BEL76T - Jul 6, 05:15 UTCJul 6, 06:40 UTC1h 25m
2026-07-05 BEL29D - Jul 5, 19:35 UTCJul 5, 20:55 UTC1h 20m
2026-07-05 BEL1BT LIN → BRU Jul 5, 17:15 UTCJul 5, 18:25 UTC1h 10m
2026-07-05 BEL6ZH BRU → LIN Jul 5, 14:50 UTCJul 5, 15:50 UTC1h 0m
2026-07-05 BEL9UR - Jul 5, 12:20 UTCJul 5, 13:40 UTC1h 20m
2026-07-05 BEL9KU BRU → MRS Jul 5, 09:55 UTCJul 5, 11:10 UTC1h 15m
2026-07-05 BEL7NL GVA → BRU Jul 5, 07:40 UTCJul 5, 08:35 UTC55m

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

Mode-S 44CDD1 frequently asked

What is Mode-S code 44CDD1?
44CDD1 is an ICAO 24-bit transponder address. Allocated to Belgium. Assigned to OO-SNQ.
Where is Mode-S 44CDD1 registered?
Mode-S code 44CDD1 is allocated to Belgium (BE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 44CDD1 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 44CDD1, octal 21146721, decimal 4,509,137.
What flights does 44CDD1 operate?
Mode-S 44CDD1 has broadcast 20 distinct callsigns, including BEL5AU, BEL6VP, BEL1EW, BEL1EV, BEL9FU.