Apparatus

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sensors Mode-S transponder

44D2AB

ICAO 24-bit transponder address · allocated to Belgium

Currently assigned to OO-TUK · BOEING 737-800

Hex
44D2AB
Octal
21151253
Decimal
4,510,379
Country
BE
Tail
OO-TUK
Type
B738
Broadcasting now · callsign JAF2535 · 37,000 ft
Flights observed
278
Distinct callsigns
20
Country
BE
Last broadcast
59m ago

Current position

44D2AB is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 44D2AB 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
JAF35D - 9 2026-07-13
JAF3NE - 7 2026-07-11
JAF9FB - 6 2026-07-10
JAF88H - 6 2026-07-11
JAF68V - 6 2026-07-13
JAF66H - 6 2026-07-06
JAF63N - 6 2026-07-13
JAF61K - 6 2026-07-11
JAF5HJ - 6 2026-07-11
JAF4AB - 6 2026-07-10
JAF3265 Jetairfly 6 2026-05-26
JAF9XK - 5 2026-07-05
JAF9LD - 5 2026-06-22
JAF6LD - 5 2026-07-10
JAF3VE - 5 2026-07-12
JAF3FD - 5 2026-06-22
JAF2JW Jetairfly 5 2026-05-18
JAF1YV - 5 2026-07-12
JAF11G - 5 2026-07-10
JAF7VD - 4 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 JAF2535 BRU → CMN Jul 14, 15:15 UTCJul 14, 16:45 UTC1h 30m
2026-07-14 JAF29J - Jul 14, 09:00 UTCJul 14, 12:25 UTC3h 25m
2026-07-14 JAF14K - Jul 14, 04:50 UTCJul 14, 07:35 UTC2h 45m
2026-07-13 JAF35D BRU → BRU Jul 13, 11:30 UTCJul 13, 21:00 UTC9h 30m
2026-07-13 JAF63N - Jul 13, 08:15 UTCJul 13, 10:10 UTC1h 55m
2026-07-13 JAF68V - Jul 13, 04:35 UTCJul 13, 06:40 UTC2h 5m
2026-07-12 JAF1YV - Jul 12, 18:05 UTCJul 12, 21:15 UTC3h 10m
2026-07-12 JAF3VE - Jul 12, 13:40 UTCJul 12, 16:35 UTC2h 55m
2026-07-12 JAF2WA - Jul 12, 08:25 UTCJul 12, 11:35 UTC3h 10m
2026-07-12 JAF63G - Jul 12, 04:25 UTCJul 12, 07:20 UTC2h 55m
2026-07-11 JAF61K - Jul 11, 18:15 UTCJul 11, 21:45 UTC3h 30m
2026-07-11 JAF5HJ - Jul 11, 12:30 UTCJul 11, 16:30 UTC4h 0m
2026-07-11 JAF3NE - Jul 11, 08:05 UTCJul 11, 10:25 UTC2h 20m
2026-07-11 JAF88H - Jul 11, 04:30 UTCJul 11, 06:55 UTC2h 25m
2026-07-10 JAF9FB - Jul 10, 17:35 UTCJul 10, 19:35 UTC2h 0m
2026-07-10 JAF6LD BRU → ALC Jul 10, 14:05 UTCJul 10, 16:15 UTC2h 10m
2026-07-10 JAF11G RHO → BRU Jul 10, 09:00 UTCJul 10, 12:30 UTC3h 30m
2026-07-10 JAF4AB - Jul 10, 04:15 UTCJul 10, 07:10 UTC2h 55m
2026-07-09 JAF3BW - Jul 9, 21:25 UTCJul 10, 00:00 UTC2h 35m
2026-07-09 JAF87A - Jul 9, 17:30 UTCJul 9, 20:10 UTC2h 40m
2026-07-09 JAF4DJ - Jul 9, 11:55 UTCJul 9, 15:40 UTC3h 45m
2026-07-09 JAF4DJ - Jul 9, 10:05 UTCJul 9, 10:35 UTC30m
2026-07-09 JAF4DJ - Jul 9, 04:40 UTCJul 9, 07:25 UTC2h 45m
2026-07-08 JAF1CB - Jul 8, 16:20 UTCJul 8, 20:00 UTC3h 40m
2026-07-08 JAF5EA - Jul 8, 11:25 UTCJul 8, 15:10 UTC3h 45m
2026-07-07 JAF11G RHO → BRU Jul 7, 09:20 UTCJul 7, 12:55 UTC3h 35m
2026-07-07 JAF4AB BRU → RHO Jul 7, 04:20 UTCJul 7, 07:25 UTC3h 5m
2026-07-06 JAF66H - Jul 6, 16:05 UTCJul 6, 20:00 UTC3h 55m
2026-07-06 JAF35D - Jul 6, 14:10 UTCJul 6, 14:55 UTC45m
2026-07-06 JAF35D - Jul 6, 10:45 UTCJul 6, 13:50 UTC3h 5m
2026-07-06 JAF63N - Jul 6, 07:25 UTCJul 6, 09:25 UTC2h 0m
2026-07-06 JAF68V - Jul 6, 04:10 UTCJul 6, 05:50 UTC1h 40m
2026-07-05 JAF9XK BRU → BRU Jul 5, 12:15 UTCJul 5, 19:40 UTC7h 25m
2026-07-05 JAF99Y FAO → BRU Jul 5, 08:05 UTCJul 5, 10:30 UTC2h 25m
2026-07-05 JAF28Y - Jul 5, 04:30 UTCJul 5, 07:00 UTC2h 30m
2026-07-04 JAF2CG - Jul 4, 18:40 UTCJul 4, 21:35 UTC2h 55m
2026-07-04 JAF2CG - Jul 4, 13:50 UTCJul 4, 16:15 UTC2h 25m
2026-07-04 JAF3LV - Jul 4, 09:30 UTCJul 4, 12:15 UTC2h 45m
2026-07-04 JAF61W - Jul 4, 05:00 UTCJul 4, 07:20 UTC2h 20m
2026-07-03 JAF6YV - Jul 3, 18:35 UTCJul 3, 21:20 UTC2h 45m
2026-07-03 JAF2PK - Jul 3, 14:50 UTCJul 3, 17:20 UTC2h 30m
2026-07-03 JAF1BH - Jul 3, 04:40 UTCJul 3, 12:35 UTC7h 55m
2026-07-02 JAF7GN - Jul 2, 22:35 UTCJul 3, 01:10 UTC2h 35m
2026-07-02 JAF4YA - Jul 2, 16:30 UTCJul 2, 19:05 UTC2h 35m
2026-07-02 TFL4KV RHO → EIN Jul 2, 11:15 UTCJul 2, 14:45 UTC3h 30m
2026-07-02 TFL61C EIN → RHO Jul 2, 06:30 UTCJul 2, 09:50 UTC3h 20m
2026-07-01 TFL7BN - Jul 1, 14:50 UTCJul 1, 18:00 UTC3h 10m
2026-07-01 TFL70K - Jul 1, 10:10 UTCJul 1, 13:10 UTC3h 0m
2026-07-01 JAF6AD - Jul 1, 05:45 UTCJul 1, 08:40 UTC2h 55m
2026-06-30 JAF4YA - Jun 30, 17:50 UTCJun 30, 20:30 UTC2h 40m

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

Mode-S 44D2AB frequently asked

What is Mode-S code 44D2AB?
44D2AB is an ICAO 24-bit transponder address. Allocated to Belgium. Assigned to OO-TUK.
Where is Mode-S 44D2AB registered?
Mode-S code 44D2AB is allocated to Belgium (BE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 44D2AB broadcasting right now?
Yes. Mode-S 44D2AB is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 44D2AB, octal 21151253, decimal 4,510,379.
What flights does 44D2AB operate?
Mode-S 44D2AB has broadcast 20 distinct callsigns, including JAF35D, JAF3NE, JAF9FB, JAF88H, JAF68V.