Apparatus

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sensors Mode-S transponder

44B5B4

ICAO 24-bit transponder address · allocated to Belgium

Currently assigned to OO-MMT · CESSNA 560XL Citation XLS

Hex
44B5B4
Octal
21132664
Decimal
4,502,964
Country
BE
Tail
OO-MMT
Type
C56X
No current signal · last broadcast 4d ago
Flights observed
103
Distinct callsigns
1
Country
BE
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S 44B5B4.

Country allocation

The ICAO 24-bit address 44B5B4 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
OOMMT - 103 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 OOMMT - Jul 13, 13:05 UTCJul 13, 15:35 UTC2h 30m
2026-07-13 OOMMT - Jul 13, 10:35 UTCJul 13, 12:15 UTC1h 40m
2026-07-11 OOMMT - Jul 11, 15:30 UTCJul 11, 16:40 UTC1h 10m
2026-07-11 OOMMT - Jul 11, 13:30 UTCJul 11, 14:50 UTC1h 20m
2026-07-11 OOMMT - Jul 11, 07:25 UTCJul 11, 08:55 UTC1h 30m
2026-07-10 OOMMT - Jul 10, 13:55 UTCJul 10, 14:25 UTC30m
2026-07-10 OOMMT - Jul 10, 11:45 UTCJul 10, 13:20 UTC1h 35m
2026-07-10 OOMMT - Jul 10, 09:05 UTCJul 10, 10:35 UTC1h 30m
2026-07-09 OOMMT - Jul 9, 12:05 UTCJul 9, 13:30 UTC1h 25m
2026-07-09 OOMMT - Jul 9, 08:05 UTCJul 9, 10:45 UTC2h 40m
2026-07-08 OOMMT - Jul 8, 14:55 UTCJul 8, 17:35 UTC2h 40m
2026-07-08 OOMMT - Jul 8, 11:25 UTCJul 8, 13:35 UTC2h 10m
2026-07-08 OOMMT - Jul 8, 09:10 UTCJul 8, 09:55 UTC45m
2026-07-08 OOMMT - Jul 8, 06:50 UTCJul 8, 08:00 UTC1h 10m
2026-07-07 OOMMT MUC → BER Jul 7, 13:15 UTCJul 7, 14:05 UTC50m
2026-07-05 OOMMT MST → MUC Jul 5, 12:15 UTCJul 5, 13:05 UTC50m
2026-07-04 OOMMT - Jul 4, 15:00 UTCJul 4, 15:30 UTC30m
2026-07-04 OOMMT - Jul 4, 11:50 UTCJul 4, 14:25 UTC2h 35m
2026-07-04 OOMMT - Jul 4, 08:15 UTCJul 4, 10:40 UTC2h 25m
2026-06-30 OOMMT CGN → KJK Jun 30, 18:45 UTCJun 30, 19:20 UTC35m
2026-06-30 OOMMT BMA → CGN Jun 30, 15:55 UTCJun 30, 17:45 UTC1h 50m
2026-06-30 OOMMT BER → BMA Jun 30, 08:00 UTCJun 30, 09:10 UTC1h 10m
2026-06-29 OOMMT - Jun 29, 15:00 UTCJun 29, 17:24 UTC2h 25m
2026-06-29 OOMMT - Jun 29, 10:34 UTCJun 29, 13:30 UTC2h 55m
2026-06-29 OOMMT - Jun 29, 08:29 UTCJun 29, 08:44 UTC15m
2026-06-28 OOMMT - Jun 28, 15:34 UTCJun 28, 17:04 UTC1h 30m
2026-06-24 OOMMT - Jun 24, 09:29 UTCJun 24, 10:59 UTC1h 30m
2026-06-23 OOMMT - Jun 23, 12:40 UTCJun 23, 15:04 UTC2h 25m
2026-06-21 OOMMT - Jun 21, 15:15 UTCJun 21, 15:34 UTC20m
2026-06-21 OOMMT - Jun 21, 12:49 UTCJun 21, 14:40 UTC1h 50m
2026-06-19 OOMMT - Jun 19, 11:59 UTCJun 19, 13:54 UTC1h 55m
2026-06-18 OOMMT FAO → XRY Jun 18, 10:45 UTCJun 18, 11:10 UTC25m
2026-06-18 OOMMT ANR → FAO Jun 18, 07:10 UTCJun 18, 09:55 UTC2h 45m
2026-06-16 OOMMT IBZ → ANR Jun 16, 12:14 UTCJun 16, 14:20 UTC2h 5m
2026-06-16 OOMMT - Jun 16, 09:10 UTCJun 16, 11:10 UTC2h 0m
2026-06-16 OOMMT - Jun 16, 07:20 UTCJun 16, 07:34 UTC15m
2026-06-14 OOMMT - Jun 14, 14:35 UTCJun 14, 17:00 UTC2h 25m
2026-06-14 OOMMT - Jun 14, 08:20 UTCJun 14, 10:25 UTC2h 5m
2026-06-13 OOMMT - Jun 13, 11:35 UTCJun 13, 13:25 UTC1h 50m
2026-06-13 OOMMT ANR → XRY Jun 13, 08:10 UTCJun 13, 10:45 UTC2h 35m
2026-06-11 OOMMT - Jun 11, 14:00 UTCJun 11, 14:20 UTC20m
2026-06-11 OOMMT IBZ → MST Jun 11, 11:10 UTCJun 11, 13:35 UTC2h 25m
2026-06-11 OOMMT - Jun 11, 09:30 UTCJun 11, 10:10 UTC40m
2026-06-10 OOMMT - Jun 10, 11:20 UTCJun 10, 12:50 UTC1h 30m
2026-06-07 OOMMT - Jun 7, 18:15 UTCJun 7, 20:45 UTC2h 30m
2026-06-07 OOMMT - Jun 7, 08:15 UTCJun 7, 10:55 UTC2h 40m
2026-06-05 OOMMT - Jun 5, 17:15 UTCJun 5, 17:25 UTC10m
2026-06-05 OOMMT - Jun 5, 15:40 UTCJun 5, 16:35 UTC55m
2026-06-05 OOMMT - Jun 5, 11:10 UTCJun 5, 12:25 UTC1h 15m
2026-06-05 OOMMT - Jun 5, 08:00 UTCJun 5, 09:50 UTC1h 50m

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

Mode-S 44B5B4 frequently asked

What is Mode-S code 44B5B4?
44B5B4 is an ICAO 24-bit transponder address. Allocated to Belgium. Assigned to OO-MMT.
Where is Mode-S 44B5B4 registered?
Mode-S code 44B5B4 is allocated to Belgium (BE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 44B5B4 broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 44B5B4, octal 21132664, decimal 4,502,964.
What flights does 44B5B4 operate?
Mode-S 44B5B4 has broadcast 1 distinct callsign, including OOMMT.