sensors Mode-S transponder

44CCD1

ICAO 24-bit transponder address · allocated to Belgium

Currently assigned to OO-SFQ · AIRBUS A-330-300

Hex
44CCD1
Octal
21146321
Decimal
4,508,881
Country
BE
Tail
OO-SFQ
Type
A333
No current signal · last broadcast 15h ago
Flights observed
8
Distinct callsigns
4
Country
BE
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S 44CCD1.

Country allocation

The ICAO 24-bit address 44CCD1 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 4 distinct

Callsign Airline Flights Last seen
BEL1CP - 4 2026-04-13
BEL38K Brussels Airlines 2 2026-04-13
BEL52B Brussels Airlines 1 2026-04-13
BEL2FU Brussels Airlines 1 2026-04-14

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-14 BEL2FU BRU → HER Apr 14, 09:15 UTCApr 14, 11:05 UTC1h 50m
2026-04-13 BEL52B JFK → BRU Apr 13, 22:30 UTCApr 13, 23:40 UTC1h 10m
2026-04-13 BEL1CP - Apr 13, 16:15 UTCApr 13, 17:05 UTC50m
2026-04-13 BEL1CP - Apr 13, 15:50 UTCApr 13, 17:05 UTC1h 15m
2026-04-13 BEL1CP - Apr 13, 15:05 UTCApr 13, 16:15 UTC1h 10m
2026-04-13 BEL1CP - Apr 13, 09:10 UTCApr 13, 11:00 UTC1h 50m
2026-04-13 BEL38K FIH → BRU Apr 13, 03:55 UTCApr 13, 04:20 UTC25m
2026-04-13 BEL38K FIH → BRU Apr 13, 02:35 UTCApr 13, 04:15 UTC1h 40m

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

Mode-S 44CCD1 frequently asked

What is Mode-S code 44CCD1?
44CCD1 is an ICAO 24-bit transponder address. Allocated to Belgium. Assigned to OO-SFQ.
Where is Mode-S 44CCD1 registered?
Mode-S code 44CCD1 is allocated to Belgium (BE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 44CCD1 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 44CCD1, octal 21146321, decimal 4,508,881.
What flights does 44CCD1 operate?
Mode-S 44CCD1 has broadcast 4 distinct callsigns, including BEL1CP, BEL38K, BEL52B, BEL2FU.