Apparatus

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sensors Mode-S transponder

44CE77

ICAO 24-bit transponder address · allocated to Belgium

Currently assigned to OO-SSW · AIRBUS A-319

Hex
44CE77
Octal
21147167
Decimal
4,509,303
Country
BE
Tail
OO-SSW
Type
A319
No current signal · last broadcast Jul 26, 20:45 UTC
Flights observed
521
Distinct callsigns
20
Country
BE
Last broadcast
Jul 26, 20:45 UTC

Last known position

Most recent position reported by Mode-S 44CE77.

Country allocation

The ICAO 24-bit address 44CE77 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
BEL9PY Brussels Airlines 9 2026-07-22
BEL8ZB - 9 2026-07-13
BEL5WE Brussels Airlines 9 2026-06-09
BEL5UB - 9 2026-07-15
BEL4LZ - 9 2026-07-13
BEL8MP - 8 2026-07-15
BEL3LZ Brussels Airlines 8 2026-06-09
BEL9CJ - 7 2026-07-14
BEL8YE - 7 2026-07-16
BEL8UK - 7 2026-07-14
BEL5XD - 7 2026-07-22
BEL2SJ - 7 2026-06-25
BEL19V - 7 2026-06-26
BEL9HZ - 6 2026-07-15
BEL8MN Brussels Airlines 6 2026-07-26
BEL7WA Brussels Airlines 6 2026-07-26
BEL7AM - 6 2026-06-20
BEL6WA Brussels Airlines 6 2026-06-05
BEL5NZ - 6 2026-07-17
BEL5HW - 6 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BEL2LZ - Jul 26, 19:15 UTCJul 26, 20:45 UTC1h 30m
2026-07-26 BEL8MN CPH → BRU Jul 26, 16:15 UTCJul 26, 17:25 UTC1h 10m
2026-07-26 BEL7WA BRU → CPH Jul 26, 13:55 UTCJul 26, 15:10 UTC1h 15m
2026-07-26 BEL6CT BCN → BRU Jul 26, 10:45 UTCJul 26, 12:35 UTC1h 50m
2026-07-26 BEL7FP BRU → BCN Jul 26, 07:55 UTCJul 26, 09:30 UTC1h 35m
2026-07-25 BEL3SG BRU → CDG Jul 25, 16:45 UTCJul 25, 18:30 UTC1h 45m
2026-07-25 BEL8KA BRU → FCO Jul 25, 13:30 UTCJul 25, 15:05 UTC1h 35m
2026-07-25 BEL4KY FRA → BRU Jul 25, 11:40 UTCJul 25, 12:15 UTC35m
2026-07-25 BEL3DQ BRU → FRA Jul 25, 09:40 UTCJul 25, 10:20 UTC40m
2026-07-25 BEL7NL GVA → BRU Jul 25, 07:35 UTCJul 25, 08:25 UTC50m
2026-07-25 BEL8LT ALC → BRU Jul 25, 05:15 UTCJul 25, 06:10 UTC55m
2026-07-24 BEL9916 - Jul 24, 17:35 UTCJul 24, 18:30 UTC55m
2026-07-23 BEL1UF BRU → GVA Jul 23, 07:25 UTCJul 23, 08:30 UTC1h 5m
2026-07-23 BEL8CL BRU → KGS Jul 23, 05:10 UTCJul 23, 05:55 UTC45m
2026-07-22 BEL3TX BRU → HAM Jul 22, 19:15 UTCJul 22, 20:10 UTC55m
2026-07-22 BEL9PY WAW → BRU Jul 22, 16:30 UTCJul 22, 18:15 UTC1h 45m
2026-07-22 BEL5XD - Jul 22, 13:45 UTCJul 22, 15:20 UTC1h 35m
2026-07-22 BEL76T TLS → BRU Jul 22, 05:05 UTCJul 22, 10:25 UTC5h 20m
2026-07-21 BEL29D BRU → TLS Jul 21, 19:10 UTCJul 21, 20:25 UTC1h 15m
2026-07-21 BEL3CQ BRU → ALC Jul 21, 16:55 UTCJul 21, 17:55 UTC1h 0m
2026-07-21 BEL9EV - Jul 21, 14:40 UTCJul 21, 15:40 UTC1h 0m
2026-07-21 BEL9UR MRS → BRU Jul 21, 11:55 UTCJul 21, 13:15 UTC1h 20m
2026-07-21 BEL9KU BRU → MRS Jul 21, 09:20 UTCJul 21, 10:40 UTC1h 20m
2026-07-21 BEL7NL GVA → BRU Jul 21, 06:45 UTCJul 21, 07:40 UTC55m
2026-07-21 BEL8LT ALC → BRU Jul 21, 04:45 UTCJul 21, 05:40 UTC55m
2026-07-20 BEL5GT AGP → BRU Jul 20, 19:00 UTCJul 20, 21:20 UTC2h 20m
2026-07-20 BEL4GU - Jul 20, 15:10 UTCJul 20, 17:45 UTC2h 35m
2026-07-20 BEL4UG TLS → BRU Jul 20, 10:30 UTCJul 20, 11:50 UTC1h 20m
2026-07-20 BEL8WD BRU → TLS Jul 20, 08:10 UTCJul 20, 09:25 UTC1h 15m
2026-07-20 BEL8HW GOT → BRU Jul 20, 05:15 UTCJul 20, 06:35 UTC1h 20m
2026-07-19 BEL3UC - Jul 19, 19:30 UTCJul 19, 20:50 UTC1h 20m
2026-07-19 BEL8AJ OSL → BRU Jul 19, 16:30 UTCJul 19, 18:15 UTC1h 45m
2026-07-19 BEL9EU - Jul 19, 13:55 UTCJul 19, 15:30 UTC1h 35m
2026-07-19 BEL6CT BCN → BRU Jul 19, 11:10 UTCJul 19, 12:50 UTC1h 40m
2026-07-19 BEL7FP BRU → BCN Jul 19, 08:20 UTCJul 19, 09:55 UTC1h 35m
2026-07-18 BEL7JN BCN → BRU Jul 18, 19:50 UTCJul 18, 21:30 UTC1h 40m
2026-07-18 BEL3FJ BRU → BCN Jul 18, 16:45 UTCJul 18, 18:20 UTC1h 35m
2026-07-18 BEL74C - Jul 18, 13:45 UTCJul 18, 15:25 UTC1h 40m
2026-07-18 BEL9QH BRU → BCN Jul 18, 11:05 UTCJul 18, 12:40 UTC1h 35m
2026-07-18 BEL9PW ALC → BRU Jul 18, 07:25 UTCJul 18, 09:30 UTC2h 5m
2026-07-18 BEL8NV BRU → ALC Jul 18, 04:05 UTCJul 18, 06:25 UTC2h 20m
2026-07-17 BEL2WM - Jul 17, 15:40 UTCJul 17, 16:59 UTC1h 20m
2026-07-17 BEL5NZ BRU → BLQ Jul 17, 12:25 UTCJul 17, 13:40 UTC1h 15m
2026-07-17 BEL4NK - Jul 17, 09:55 UTCJul 17, 11:04 UTC1h 10m
2026-07-17 BEL8CE - Jul 17, 08:00 UTCJul 17, 08:54 UTC55m
2026-07-17 BEL8CL HAM → BRU Jul 17, 05:45 UTCJul 17, 06:29 UTC45m
2026-07-16 BEL3TX BRU → HAM Jul 16, 19:10 UTCJul 16, 20:00 UTC50m
2026-07-16 BEL3JZ - Jul 16, 17:00 UTCJul 16, 18:05 UTC1h 5m
2026-07-16 BEL2HJ BRU → BER Jul 16, 14:45 UTCJul 16, 15:45 UTC1h 0m
2026-07-16 BEL5UC - Jul 16, 11:25 UTCJul 16, 13:30 UTC2h 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-SSW page for operator, model, and routing details .

Mode-S 44CE77 frequently asked

What is Mode-S code 44CE77?
44CE77 is an ICAO 24-bit transponder address. Allocated to Belgium. Assigned to OO-SSW.
Where is Mode-S 44CE77 registered?
Mode-S code 44CE77 is allocated to Belgium (BE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 44CE77 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 44CE77, octal 21147167, decimal 4,509,303.
What flights does 44CE77 operate?
Mode-S 44CE77 has broadcast 20 distinct callsigns, including BEL9PY, BEL8ZB, BEL5WE, BEL5UB, BEL4LZ.