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 Jul 26, 22:15 UTC
Flights observed
457
Distinct callsigns
20
Country
BE
Last broadcast
Jul 26, 22:15 UTC

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
BEL9FU Brussels Airlines 7 2026-07-24
BEL9EV - 7 2026-07-17
BEL6VP - 7 2026-07-07
BEL5GR Brussels Airlines 7 2026-07-24
BEL3CQ - 7 2026-07-17
BEL1EW - 7 2026-06-26
BEL1EV - 7 2026-07-07
BEL6TC Brussels Airlines 6 2026-07-26
BEL5KF - 6 2026-06-24
BEL4UT Brussels Airlines 6 2026-06-24
BEL3ZY Brussels Airlines 6 2026-07-26
BEL9PW - 5 2026-06-25
BEL7LW Brussels Airlines 5 2026-06-12
BEL3WF Brussels Airlines 5 2026-07-26
BEL3CP Brussels Airlines 5 2026-06-12
BEL1VC Brussels Airlines 5 2026-07-26
BEL1PA - 5 2026-07-20
BEL9UR - 4 2026-07-12
BEL9KU - 4 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BEL1VC ATH → BRU Jul 26, 18:55 UTCJul 26, 22:05 UTC3h 10m
2026-07-26 BEL3WF BRU → ATH Jul 26, 14:50 UTCJul 26, 17:30 UTC2h 40m
2026-07-26 BEL6HF NCE → BRU Jul 26, 11:45 UTCJul 26, 13:20 UTC1h 35m
2026-07-26 BEL5CG BRU → NCE Jul 26, 09:05 UTCJul 26, 10:20 UTC1h 15m
2026-07-26 BEL6TC CDG → BRU Jul 26, 06:35 UTCJul 26, 07:10 UTC35m
2026-07-26 BEL3ZY BRU → CDG Jul 26, 04:50 UTCJul 26, 05:25 UTC35m
2026-07-25 BEL1CU SMI → BRU Jul 25, 16:30 UTCJul 25, 18:20 UTC1h 50m
2026-07-25 BEL2CQ BRU → PMI Jul 25, 13:15 UTCJul 25, 15:05 UTC1h 50m
2026-07-25 BEL4LZ FRA → BRU Jul 25, 09:20 UTCJul 25, 09:50 UTC30m
2026-07-25 BEL8ZB BRU → FRA Jul 25, 06:55 UTCJul 25, 07:30 UTC35m
2026-07-24 BEL5KV BRU → VIE Jul 24, 17:20 UTCJul 24, 19:40 UTC2h 20m
2026-07-24 BEL3MN BRU → AGP Jul 24, 13:10 UTCJul 24, 15:35 UTC2h 25m
2026-07-24 BEL9FU MUC → BRU Jul 24, 10:20 UTCJul 24, 11:20 UTC1h 0m
2026-07-24 BEL5GR BRU → MUC Jul 24, 08:10 UTCJul 24, 09:10 UTC1h 0m
2026-07-24 BEL76T TLS → BRU Jul 24, 05:05 UTCJul 24, 06:25 UTC1h 20m
2026-07-23 BEL29D BRU → TLS Jul 23, 19:10 UTCJul 23, 20:25 UTC1h 15m
2026-07-23 BEL2YK AGP → BRU Jul 23, 14:00 UTCJul 23, 16:25 UTC2h 25m
2026-07-23 BEL6EP BRU → AGP Jul 23, 10:25 UTCJul 23, 12:45 UTC2h 20m
2026-07-23 BEL1GH LIN → BRU Jul 23, 07:45 UTCJul 23, 09:00 UTC1h 15m
2026-07-23 BEL4CB BRU → LIN Jul 23, 05:30 UTCJul 23, 06:35 UTC1h 5m
2026-07-22 BEL6DN GVA → BRU Jul 22, 18:35 UTCJul 22, 20:40 UTC2h 5m
2026-07-22 BEL4AR BRU → ALC Jul 22, 15:10 UTCJul 22, 17:10 UTC2h 0m
2026-07-22 BEL23U EDI → BRU Jul 22, 12:40 UTCJul 22, 13:50 UTC1h 10m
2026-07-21 BEL8LD RHO → BRU Jul 21, 17:50 UTCJul 21, 21:15 UTC3h 25m
2026-07-21 BEL3UF BRU → RHO Jul 21, 13:25 UTCJul 21, 16:25 UTC3h 0m
2026-07-21 BEL4KY FRA → BRU Jul 21, 10:50 UTCJul 21, 11:25 UTC35m
2026-07-21 BEL3DQ BRU → FRA Jul 21, 08:50 UTCJul 21, 09:20 UTC30m
2026-07-21 BEL6TC CDG → BRU Jul 21, 06:45 UTCJul 21, 07:20 UTC35m
2026-07-21 BEL3ZY BRU → CDG Jul 21, 04:50 UTCJul 21, 05:30 UTC40m
2026-07-20 BEL1PA VLC → BRU Jul 20, 19:25 UTCJul 20, 21:25 UTC2h 0m
2026-07-20 BEL7JV BRU → VLC Jul 20, 16:00 UTCJul 20, 17:55 UTC1h 55m
2026-07-20 BEL8HR - Jul 20, 12:20 UTCJul 20, 14:15 UTC1h 55m
2026-07-20 BEL1MG BRU → OPO Jul 20, 08:50 UTCJul 20, 10:50 UTC2h 0m
2026-07-20 BEL6TC CDG → BRU Jul 20, 06:50 UTCJul 20, 07:30 UTC40m
2026-07-20 BEL3ZY BRU → CDG Jul 20, 04:55 UTCJul 20, 05:35 UTC40m
2026-07-19 BEL9CJ BRU → NDR Jul 19, 17:50 UTCJul 19, 18:30 UTC40m
2026-07-19 BEL8UK BRU → FRA Jul 19, 15:45 UTCJul 19, 16:25 UTC40m
2026-07-19 BEL8HR OPO → BRU Jul 19, 12:10 UTCJul 19, 14:10 UTC2h 0m
2026-07-19 BEL1MG BRU → OPO Jul 19, 08:40 UTCJul 19, 10:50 UTC2h 10m
2026-07-18 BEL4UG TLS → BRU Jul 18, 10:50 UTCJul 18, 12:15 UTC1h 25m
2026-07-18 BEL8WD BRU → TLS Jul 18, 07:55 UTCJul 18, 09:15 UTC1h 20m
2026-07-18 BEL6WA BUD → BRU Jul 18, 04:40 UTCJul 18, 06:25 UTC1h 45m
2026-07-17 BEL7JU BRU → BUD Jul 17, 20:44 UTCJul 17, 22:20 UTC1h 35m
2026-07-17 BEL3CQ MUC → BRU Jul 17, 17:15 UTCJul 17, 18:10 UTC55m
2026-07-17 BEL9EV BRU → MUC Jul 17, 14:44 UTCJul 17, 15:49 UTC1h 5m
2026-07-17 BEL23U EDI → BRU Jul 17, 12:19 UTCJul 17, 13:29 UTC1h 10m
2026-07-17 BEL4OZ BRU → EDI Jul 17, 09:30 UTCJul 17, 10:40 UTC1h 10m
2026-07-17 BEL6TC CDG → BRU Jul 17, 06:54 UTCJul 17, 07:25 UTC30m
2026-07-17 BEL3ZY BRU → CDG Jul 17, 04:59 UTCJul 17, 05:35 UTC35m
2026-07-16 BEL6KU - Jul 16, 18:34 UTCJul 16, 21:30 UTC2h 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-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 Jul 26, 22:15 UTC.
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, BEL9FU, BEL9EV, BEL6VP, BEL5GR.