Apparatus

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sensors Mode-S transponder

44CE72

ICAO 24-bit transponder address · allocated to Belgium

Currently assigned to OO-SSR · AIRBUS A-319

Hex
44CE72
Octal
21147162
Decimal
4,509,298
Country
BE
Tail
OO-SSR
Type
A319
No current signal · last broadcast 2h ago
Flights observed
268
Distinct callsigns
20
Country
BE
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 44CE72.

Country allocation

The ICAO 24-bit address 44CE72 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
BEL1ZK Brussels Airlines 7 2026-06-11
BEL8YE Brussels Airlines 6 2026-06-12
BEL7GZ Brussels Airlines 6 2026-06-12
BEL5MQ Brussels Airlines 6 2026-06-12
BEL9UR Brussels Airlines 5 2026-05-29
BEL9KU Brussels Airlines 5 2026-05-29
BEL9BP Brussels Airlines 5 2026-06-09
BEL8KG Brussels Airlines 5 2026-06-03
BEL5LY Brussels Airlines 5 2026-06-03
BEL2PN Brussels Airlines 5 2026-06-09
BEL9PY Brussels Airlines 4 2026-06-12
BEL8ZB Brussels Airlines 4 2026-06-08
BEL8MP Brussels Airlines 4 2026-06-05
BEL8HQ Brussels Airlines 4 2026-06-11
BEL5XD Brussels Airlines 4 2026-06-12
BEL5UB Brussels Airlines 4 2026-06-05
BEL5AU Brussels Airlines 4 2026-06-05
BEL4TQ Brussels Airlines 4 2026-06-11
BEL4LZ Brussels Airlines 4 2026-06-08
BEL9SW Brussels Airlines 3 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-12 BEL9PY WAW → BRU Jun 12, 16:25 UTCJun 12, 18:15 UTC1h 50m
2026-06-12 BEL5XD BRU → WAW Jun 12, 13:35 UTCJun 12, 15:10 UTC1h 35m
2026-06-12 BEL5MQ HAM → BRU Jun 12, 11:15 UTCJun 12, 12:10 UTC55m
2026-06-12 BEL7GZ BRU → HAM Jun 12, 07:55 UTCJun 12, 08:45 UTC50m
2026-06-12 BEL8YE BER → BRU Jun 12, 05:00 UTCJun 12, 06:00 UTC1h 0m
2026-06-11 BEL1ZK BRU → BER Jun 11, 18:55 UTCJun 11, 20:00 UTC1h 5m
2026-06-11 BEL2YK AGP → BRU Jun 11, 13:50 UTCJun 11, 16:15 UTC2h 25m
2026-06-11 BEL6EP BRU → AGP Jun 11, 10:15 UTCJun 11, 12:30 UTC2h 15m
2026-06-11 BEL4TQ ZRH → BRU Jun 11, 07:20 UTCJun 11, 08:15 UTC55m
2026-06-11 BEL8HQ BRU → ZRH Jun 11, 05:15 UTCJun 11, 06:05 UTC50m
2026-06-10 BEL72R GVA → BRU Jun 10, 19:30 UTCJun 10, 20:25 UTC55m
2026-06-10 BEL4GV BRU → GVA Jun 10, 17:45 UTCJun 10, 18:45 UTC1h 0m
2026-06-10 BEL74C BCN → BRU Jun 10, 13:35 UTCJun 10, 15:25 UTC1h 50m
2026-06-10 BEL9QH BRU → BCN Jun 10, 10:45 UTCJun 10, 12:15 UTC1h 30m
2026-06-10 BEL5HW BER → BRU Jun 10, 06:30 UTCJun 10, 07:35 UTC1h 5m
2026-06-10 BEL2JY BRU → BER Jun 10, 04:40 UTCJun 10, 05:40 UTC1h 0m
2026-06-09 BEL9WV VIE → BRU Jun 9, 20:10 UTCJun 9, 20:55 UTC45m
2026-06-09 BEL7VN BRU → VIE Jun 9, 17:30 UTCJun 9, 19:25 UTC1h 55m
2026-06-09 BEL9BP MUC → BRU Jun 9, 14:10 UTCJun 9, 15:15 UTC1h 5m
2026-06-09 BEL2PN BRU → SPU Jun 9, 11:55 UTCJun 9, 12:55 UTC1h 0m
2026-06-09 BEL9HR GVA → BRU Jun 9, 09:45 UTCJun 9, 10:45 UTC1h 0m
2026-06-09 BEL1UF BRU → GVA Jun 9, 07:35 UTCJun 9, 08:30 UTC55m
2026-06-09 BEL8YE BER → BRU Jun 9, 05:05 UTCJun 9, 06:10 UTC1h 5m
2026-06-08 BEL1ZK BRU → BER Jun 8, 19:00 UTCJun 8, 20:00 UTC1h 0m
2026-06-08 BEL4CR KRK → BRU Jun 8, 15:20 UTCJun 8, 16:55 UTC1h 35m
2026-06-08 BEL8GQ NDR → BRU Jun 8, 13:00 UTCJun 8, 14:25 UTC1h 25m
2026-06-08 BEL4LZ FRA → BRU Jun 8, 09:05 UTCJun 8, 09:45 UTC40m
2026-06-08 BEL8ZB BRU → FRA Jun 8, 06:55 UTCJun 8, 07:40 UTC45m
2026-06-08 BEL8DM - Jun 8, 03:55 UTCJun 8, 05:35 UTC1h 40m
2026-06-07 BEL2LZ - Jun 7, 19:05 UTCJun 7, 20:40 UTC1h 35m
2026-06-07 BEL8MN CPH → BRU Jun 7, 16:40 UTCJun 7, 17:45 UTC1h 5m
2026-06-07 BEL7WA BRU → CPH Jun 7, 13:55 UTCJun 7, 15:15 UTC1h 20m
2026-06-07 BEL6CT BCN → BRU Jun 7, 10:55 UTCJun 7, 12:40 UTC1h 45m
2026-06-07 BEL7FP BRU → BCN Jun 7, 07:55 UTCJun 7, 09:35 UTC1h 40m
2026-06-06 BEL7LW OPO → BRU Jun 6, 16:39 UTCJun 6, 18:35 UTC1h 55m
2026-06-06 BEL3CP BRU → OPO Jun 6, 13:20 UTCJun 6, 15:34 UTC2h 15m
2026-06-06 BEL9HR GVA → BRU Jun 6, 09:45 UTCJun 6, 10:39 UTC55m
2026-06-06 BEL1UF BRU → GVA Jun 6, 07:50 UTCJun 6, 08:45 UTC55m
2026-06-06 BEL2654 MUC → BRU Jun 6, 04:40 UTCJun 6, 05:40 UTC1h 0m
2026-06-05 BEL2653 BRU → MUC Jun 5, 19:25 UTCJun 5, 20:20 UTC55m
2026-06-05 BEL3SG BRU → CDG Jun 5, 16:20 UTCJun 5, 18:15 UTC1h 55m
2026-06-05 BEL8KA BRU → FCO Jun 5, 13:15 UTCJun 5, 14:55 UTC1h 40m
2026-06-05 BEL8MP MAN → BRU Jun 5, 10:25 UTCJun 5, 11:25 UTC1h 0m
2026-06-05 BEL5UB BRU → MAN Jun 5, 08:20 UTCJun 5, 09:15 UTC55m
2026-06-05 BEL5AU OSL → BRU Jun 5, 04:55 UTCJun 5, 06:25 UTC1h 30m
2026-06-04 BEL1EW BRU → OSL Jun 4, 19:15 UTCJun 4, 20:45 UTC1h 30m
2026-06-04 BEL2KP PRG → BRU Jun 4, 17:15 UTCJun 4, 18:25 UTC1h 10m
2026-06-04 BEL2ZR BRU → PRG Jun 4, 14:55 UTCJun 4, 15:55 UTC1h 0m
2026-06-04 BEL3LZ LIN → BRU Jun 4, 11:30 UTCJun 4, 12:50 UTC1h 20m
2026-06-04 BEL5WE BRU → LIN Jun 4, 09:25 UTCJun 4, 10:30 UTC1h 5m

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

Mode-S 44CE72 frequently asked

What is Mode-S code 44CE72?
44CE72 is an ICAO 24-bit transponder address. Allocated to Belgium. Assigned to OO-SSR.
Where is Mode-S 44CE72 registered?
Mode-S code 44CE72 is allocated to Belgium (BE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 44CE72 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 44CE72, octal 21147162, decimal 4,509,298.
What flights does 44CE72 operate?
Mode-S 44CE72 has broadcast 20 distinct callsigns, including BEL1ZK, BEL8YE, BEL7GZ, BEL5MQ, BEL9UR.