Apparatus

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sensors Mode-S transponder

44D193

ICAO 24-bit transponder address · allocated to Belgium

Hex
44D193
Octal
21150623
Decimal
4,510,099
Country
BE
No current signal · last broadcast 21h ago
Flights observed
57
Distinct callsigns
1
Country
BE
Last broadcast
21h ago

Last known position

Most recent position reported by Mode-S 44D193.

Country allocation

The ICAO 24-bit address 44D193 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
OOTLS - 57 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-25 OOTLS - Jun 25, 15:29 UTCJun 25, 15:40 UTC10m
2026-06-25 OOTLS - Jun 25, 07:54 UTCJun 25, 08:04 UTC10m
2026-06-24 OOTLS - Jun 24, 15:35 UTCJun 24, 15:44 UTC10m
2026-06-24 OOTLS - Jun 24, 13:50 UTCJun 24, 14:29 UTC40m
2026-06-23 OOTLS - Jun 23, 05:39 UTCJun 23, 06:29 UTC50m
2026-06-22 OOTLS - Jun 22, 15:24 UTCJun 22, 15:40 UTC15m
2026-06-22 OOTLS - Jun 22, 06:29 UTCJun 22, 06:45 UTC15m
2026-06-21 OOTLS - Jun 21, 15:40 UTCJun 21, 15:49 UTC10m
2026-06-21 OOTLS - Jun 21, 12:55 UTCJun 21, 13:15 UTC20m
2026-06-20 OOTLS - Jun 20, 17:14 UTCJun 20, 17:24 UTC10m
2026-06-19 OOTLS - Jun 19, 10:04 UTCJun 19, 10:19 UTC15m
2026-06-19 OOTLS - Jun 19, 06:54 UTCJun 19, 07:09 UTC15m
2026-06-18 OOTLS - Jun 18, 10:55 UTCJun 18, 11:05 UTC10m
2026-06-18 OOTLS - Jun 18, 08:40 UTCJun 18, 08:55 UTC15m
2026-06-17 OOTLS - Jun 17, 17:55 UTCJun 17, 18:05 UTC10m
2026-06-17 OOTLS - Jun 17, 15:05 UTCJun 17, 15:20 UTC15m
2026-06-17 OOTLS - Jun 17, 13:30 UTCJun 17, 14:05 UTC35m
2026-06-16 OOTLS - Jun 16, 15:05 UTCJun 16, 16:00 UTC55m
2026-06-16 OOTLS - Jun 16, 06:59 UTCJun 16, 07:20 UTC20m
2026-06-10 OOTLS - Jun 10, 15:05 UTCJun 10, 16:00 UTC55m
2026-06-10 OOTLS - Jun 10, 11:15 UTCJun 10, 11:30 UTC15m
2026-06-09 OOTLS - Jun 9, 07:05 UTCJun 9, 07:50 UTC45m
2026-06-07 OOTLS - Jun 7, 14:45 UTCJun 7, 15:10 UTC25m
2026-06-05 OOTLS - Jun 5, 09:10 UTCJun 5, 09:25 UTC15m
2026-06-05 OOTLS - Jun 5, 08:20 UTCJun 5, 08:35 UTC15m
2026-06-05 OOTLS - Jun 5, 06:50 UTCJun 5, 07:05 UTC15m
2026-05-30 OOTLS - May 30, 18:05 UTCMay 30, 18:30 UTC25m
2026-05-30 OOTLS - May 30, 13:45 UTCMay 30, 14:00 UTC15m
2026-05-28 OOTLS - May 28, 15:35 UTCMay 28, 15:50 UTC15m
2026-05-28 OOTLS - May 28, 09:30 UTCMay 28, 09:55 UTC25m
2026-05-28 OOTLS - May 28, 07:25 UTCMay 28, 07:40 UTC15m
2026-05-28 OOTLS - May 28, 05:15 UTCMay 28, 05:30 UTC15m
2026-05-27 OOTLS - May 27, 14:40 UTCMay 27, 15:30 UTC50m
2026-05-26 OOTLS - May 26, 07:15 UTCMay 26, 08:04 UTC50m
2026-05-25 OOTLS - May 25, 12:45 UTCMay 25, 13:45 UTC1h 0m
2026-05-25 OOTLS - May 25, 10:40 UTCMay 25, 11:45 UTC1h 5m
2026-05-25 OOTLS - May 25, 07:30 UTCMay 25, 09:00 UTC1h 30m
2026-05-24 OOTLS - May 24, 17:00 UTCMay 24, 17:30 UTC30m
2026-05-21 OOTLS - May 21, 16:30 UTCMay 21, 16:55 UTC25m
2026-05-21 OOTLS - May 21, 15:35 UTCMay 21, 15:50 UTC15m
2026-05-21 OOTLS - May 21, 14:00 UTCMay 21, 14:20 UTC20m
2026-05-21 OOTLS - May 21, 07:15 UTCMay 21, 07:40 UTC25m
2026-05-20 OOTLS - May 20, 14:25 UTCMay 20, 15:35 UTC1h 10m
2026-05-19 OOTLS - May 19, 08:50 UTCMay 19, 09:45 UTC55m
2026-05-18 OOTLS - May 18, 16:15 UTCMay 18, 16:30 UTC15m
2026-05-18 OOTLS - May 18, 06:10 UTCMay 18, 06:25 UTC15m
2026-05-17 OOTLS - May 17, 12:40 UTCMay 17, 12:55 UTC15m
2026-05-15 OOTLS - May 15, 13:45 UTCMay 15, 13:55 UTC10m
2026-05-15 OOTLS - May 15, 12:40 UTCMay 15, 12:50 UTC10m
2026-05-14 OOTLS - May 14, 10:20 UTCMay 14, 10:35 UTC15m

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.

Mode-S 44D193 frequently asked

What is Mode-S code 44D193?
44D193 is an ICAO 24-bit transponder address. Allocated to Belgium.
Where is Mode-S 44D193 registered?
Mode-S code 44D193 is allocated to Belgium (BE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 44D193 broadcasting right now?
No active broadcast right now. Last signal was 21h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 44D193, octal 21150623, decimal 4,510,099.
What flights does 44D193 operate?
Mode-S 44D193 has broadcast 1 distinct callsign, including OOTLS.