Apparatus

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sensors Mode-S transponder

4488B4

ICAO 24-bit transponder address · allocated to Belgium

Currently assigned to OO-BET · CESSNA 152

Hex
4488B4
Octal
21104264
Decimal
4,491,444
Country
BE
Tail
OO-BET
Type
C152
No current signal · last broadcast 14h ago
Flights observed
157
Distinct callsigns
1
Country
BE
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S 4488B4.

Country allocation

The ICAO 24-bit address 4488B4 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 1 distinct

Callsign Airline Flights Last seen
OOBET - 157 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 OOBET - Jul 17, 12:00 UTCJul 17, 12:40 UTC40m
2026-07-17 OOBET - Jul 17, 08:54 UTCJul 17, 09:35 UTC40m
2026-07-16 OOBET - Jul 16, 10:50 UTCJul 16, 11:45 UTC55m
2026-07-16 OOBET - Jul 16, 08:45 UTCJul 16, 09:20 UTC35m
2026-07-15 OOBET - Jul 15, 08:50 UTCJul 15, 09:20 UTC30m
2026-07-14 OOBET - Jul 14, 14:15 UTCJul 14, 15:45 UTC1h 30m
2026-07-14 OOBET - Jul 14, 08:35 UTCJul 14, 10:05 UTC1h 30m
2026-07-13 OOBET - Jul 13, 12:15 UTCJul 13, 13:55 UTC1h 40m
2026-07-13 OOBET - Jul 13, 08:10 UTCJul 13, 09:35 UTC1h 25m
2026-07-12 OOBET - Jul 12, 10:55 UTCJul 12, 11:55 UTC1h 0m
2026-07-12 OOBET - Jul 12, 08:50 UTCJul 12, 09:50 UTC1h 0m
2026-07-11 OOBET - Jul 11, 15:45 UTCJul 11, 16:15 UTC30m
2026-07-11 OOBET - Jul 11, 14:05 UTCJul 11, 14:40 UTC35m
2026-07-11 OOBET - Jul 11, 12:30 UTCJul 11, 13:15 UTC45m
2026-07-11 OOBET - Jul 11, 10:15 UTCJul 11, 10:50 UTC35m
2026-07-10 OOBET - Jul 10, 13:25 UTCJul 10, 14:25 UTC1h 0m
2026-07-10 OOBET - Jul 10, 10:55 UTCJul 10, 12:00 UTC1h 5m
2026-07-09 OOBET - Jul 9, 16:15 UTCJul 9, 16:55 UTC40m
2026-07-09 OOBET - Jul 9, 15:00 UTCJul 9, 15:35 UTC35m
2026-07-09 OOBET - Jul 9, 09:40 UTCJul 9, 10:10 UTC30m
2026-07-09 OOBET - Jul 9, 08:15 UTCJul 9, 08:45 UTC30m
2026-07-08 OOBET - Jul 8, 09:55 UTCJul 8, 11:05 UTC1h 10m
2026-07-08 OOBET - Jul 8, 08:15 UTCJul 8, 08:50 UTC35m
2026-07-07 OOBET - Jul 7, 16:35 UTCJul 7, 17:10 UTC35m
2026-07-07 OOBET - Jul 7, 14:35 UTCJul 7, 15:15 UTC40m
2026-07-07 OOBET - Jul 7, 12:55 UTCJul 7, 13:35 UTC40m
2026-07-07 OOBET - Jul 7, 10:00 UTCJul 7, 10:35 UTC35m
2026-07-07 OOBET - Jul 7, 08:10 UTCJul 7, 08:50 UTC40m
2026-07-06 OOBET - Jul 6, 10:30 UTCJul 6, 11:15 UTC45m
2026-07-05 OOBET - Jul 5, 14:20 UTCJul 5, 15:10 UTC50m
2026-07-05 OOBET - Jul 5, 12:20 UTCJul 5, 12:55 UTC35m
2026-07-04 OOBET - Jul 4, 10:40 UTCJul 4, 11:35 UTC55m
2026-07-04 OOBET - Jul 4, 07:55 UTCJul 4, 08:35 UTC40m
2026-07-03 OOBET - Jul 3, 16:25 UTCJul 3, 17:05 UTC40m
2026-07-03 OOBET - Jul 3, 14:30 UTCJul 3, 15:15 UTC45m
2026-07-03 OOBET - Jul 3, 09:45 UTCJul 3, 10:50 UTC1h 5m
2026-07-01 OOBET - Jul 1, 15:25 UTCJul 1, 15:55 UTC30m
2026-06-30 OOBET - Jun 30, 14:55 UTCJun 30, 15:35 UTC40m
2026-06-30 OOBET - Jun 30, 13:30 UTCJun 30, 14:15 UTC45m
2026-06-27 OOBET - Jun 27, 08:14 UTCJun 27, 08:55 UTC40m
2026-06-25 OOBET - Jun 25, 08:09 UTCJun 25, 08:50 UTC40m
2026-06-23 OOBET - Jun 23, 15:44 UTCJun 23, 16:24 UTC40m
2026-06-22 OOBET - Jun 22, 11:30 UTCJun 22, 12:25 UTC55m
2026-06-22 OOBET - Jun 22, 09:10 UTCJun 22, 10:00 UTC50m
2026-06-21 OOBET - Jun 21, 09:49 UTCJun 21, 10:14 UTC25m
2026-06-21 OOBET - Jun 21, 08:40 UTCJun 21, 09:00 UTC20m
2026-06-20 OOBET - Jun 20, 09:59 UTCJun 20, 10:55 UTC55m
2026-06-20 OOBET - Jun 20, 08:25 UTCJun 20, 09:05 UTC40m
2026-06-19 OOBET - Jun 19, 11:59 UTCJun 19, 12:25 UTC25m
2026-06-19 OOBET - Jun 19, 10:50 UTCJun 19, 11:20 UTC30m

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

Mode-S 4488B4 frequently asked

What is Mode-S code 4488B4?
4488B4 is an ICAO 24-bit transponder address. Allocated to Belgium. Assigned to OO-BET.
Where is Mode-S 4488B4 registered?
Mode-S code 4488B4 is allocated to Belgium (BE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4488B4 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4488B4, octal 21104264, decimal 4,491,444.
What flights does 4488B4 operate?
Mode-S 4488B4 has broadcast 1 distinct callsign, including OOBET.