Apparatus

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sensors Mode-S transponder

44A6E4

ICAO 24-bit transponder address · allocated to Belgium

Currently assigned to OO-IWD · BOEING 737-800

Hex
44A6E4
Octal
21123344
Decimal
4,499,172
Country
BE
Tail
OO-IWD
Type
B738
No current signal · last broadcast Jul 26, 20:25 UTC
Flights observed
235
Distinct callsigns
20
Country
BE
Last broadcast
Jul 26, 20:25 UTC

Last known position

Most recent position reported by Mode-S 44A6E4.

Country allocation

The ICAO 24-bit address 44A6E4 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
TAY6SF - 54 2026-07-24
TAY3SF - 44 2026-07-24
TAY6IX - 25 2026-07-20
TAY5IX - 20 2026-07-03
TAY5TR - 9 2026-07-05
TAY7CA ASL Airlines Belgium 8 2026-05-08
TAY4BC - 7 2026-07-13
TAY3BC - 7 2026-07-10
TAY6DN - 6 2026-06-16
TAY6CA ASL Airlines Belgium 6 2026-05-08
TAY1KU - 6 2026-07-19
TAY7VC - 5 2026-05-29
TAY3WZ - 5 2026-07-26
TAY9VX - 4 2026-05-29
TAY9MS ASL Airlines Belgium 3 2026-04-20
TAY1MS - 3 2026-04-17
TAY8VC - 2 2026-06-19
TAY8SR - 2 2026-06-17
TAY7SR - 2 2026-06-17
TAY5VC - 2 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TAY3WZ - Jul 26, 18:45 UTCJul 26, 20:25 UTC1h 40m
2026-07-24 TAY6SF SOF → OTP Jul 24, 19:15 UTCJul 24, 22:00 UTC2h 45m
2026-07-24 TAY6SF - Jul 24, 17:35 UTCJul 24, 18:15 UTC40m
2026-07-24 TAY3SF - Jul 24, 06:20 UTCJul 24, 07:00 UTC40m
2026-07-24 TAY3SF - Jul 24, 02:50 UTCJul 24, 05:10 UTC2h 20m
2026-07-23 TAY6SF - Jul 23, 19:20 UTCJul 23, 22:00 UTC2h 40m
2026-07-23 TAY6SF - Jul 23, 17:40 UTCJul 23, 18:10 UTC30m
2026-07-23 TAY3SF - Jul 23, 06:10 UTCJul 23, 06:45 UTC35m
2026-07-23 TAY3SF - Jul 23, 02:45 UTCJul 23, 04:55 UTC2h 10m
2026-07-22 TAY6SF - Jul 22, 19:20 UTCJul 22, 22:00 UTC2h 40m
2026-07-22 TAY6SF - Jul 22, 17:40 UTCJul 22, 18:10 UTC30m
2026-07-22 TAY3SF - Jul 22, 02:55 UTCJul 22, 05:10 UTC2h 15m
2026-07-21 TAY6SF - Jul 21, 19:15 UTCJul 21, 22:00 UTC2h 45m
2026-07-21 TAY6SF - Jul 21, 17:40 UTCJul 21, 18:05 UTC25m
2026-07-21 TAY3SF - Jul 21, 06:20 UTCJul 21, 06:55 UTC35m
2026-07-21 TAY3SF - Jul 21, 03:05 UTCJul 21, 05:35 UTC2h 30m
2026-07-20 TAY6IX - Jul 20, 19:55 UTCJul 20, 21:55 UTC2h 0m
2026-07-20 TAY6IX - Jul 20, 17:50 UTCJul 20, 18:30 UTC40m
2026-07-19 TAY1KU - Jul 19, 20:05 UTCJul 19, 21:10 UTC1h 5m
2026-07-19 TAY1KU - Jul 19, 17:10 UTCJul 19, 18:50 UTC1h 40m
2026-07-17 TAY7LQ BLQ → CDG Jul 17, 21:10 UTCJul 17, 22:35 UTC1h 25m
2026-07-17 TAY6LQ CDG → BLQ Jul 17, 02:20 UTCJul 17, 03:45 UTC1h 25m
2026-07-16 TAY6SF - Jul 16, 19:35 UTCJul 16, 22:30 UTC2h 55m
2026-07-16 TAY6SF - Jul 16, 17:30 UTCJul 16, 18:05 UTC35m
2026-07-16 TAY3SF - Jul 16, 08:10 UTCJul 16, 08:50 UTC40m
2026-07-16 TAY3SF - Jul 16, 03:00 UTCJul 16, 05:10 UTC2h 10m
2026-07-15 TAY6SF - Jul 15, 19:25 UTCJul 15, 22:25 UTC3h 0m
2026-07-15 TAY6SF - Jul 15, 17:35 UTCJul 15, 18:10 UTC35m
2026-07-15 TAY3SF - Jul 15, 06:05 UTCJul 15, 06:30 UTC25m
2026-07-15 TAY3SF - Jul 15, 02:45 UTCJul 15, 05:00 UTC2h 15m
2026-07-14 TAY6SF - Jul 14, 19:20 UTCJul 14, 22:15 UTC2h 55m
2026-07-14 TAY6SF - Jul 14, 17:30 UTCJul 14, 18:05 UTC35m
2026-07-14 TAY3SF - Jul 14, 06:10 UTCJul 14, 06:35 UTC25m
2026-07-14 TAY3SF - Jul 14, 02:45 UTCJul 14, 05:00 UTC2h 15m
2026-07-13 TAY4BC BCN → CDG Jul 13, 21:05 UTCJul 13, 22:25 UTC1h 20m
2026-07-10 TAY3BC - Jul 10, 02:45 UTCJul 10, 04:10 UTC1h 25m
2026-07-09 TAY4BC BCN → CDG Jul 9, 21:15 UTCJul 9, 22:35 UTC1h 20m
2026-07-09 TAY3BC - Jul 9, 02:40 UTCJul 9, 04:00 UTC1h 20m
2026-07-08 TAY4BC BCN → CDG Jul 8, 21:10 UTCJul 8, 22:35 UTC1h 25m
2026-07-08 TAY3BC - Jul 8, 03:10 UTCJul 8, 04:25 UTC1h 15m
2026-07-07 TAY4BC BCN → CDG Jul 7, 21:25 UTCJul 7, 22:55 UTC1h 30m
2026-07-07 TAY3BC CDG → BCN Jul 7, 02:55 UTCJul 7, 04:15 UTC1h 20m
2026-07-06 TAY6SF - Jul 6, 19:20 UTCJul 6, 22:05 UTC2h 45m
2026-07-06 TAY6SF SOF → OTP Jul 6, 17:45 UTCJul 6, 18:20 UTC35m
2026-07-05 TAY5TR - Jul 5, 20:20 UTCJul 5, 21:20 UTC1h 0m
2026-07-05 TAY5TR - Jul 5, 17:10 UTCJul 5, 18:55 UTC1h 45m
2026-07-03 TAY6IX - Jul 3, 19:45 UTCJul 3, 21:40 UTC1h 55m
2026-07-03 TAY6IX - Jul 3, 17:35 UTCJul 3, 18:35 UTC1h 0m
2026-07-03 TAY5IX - Jul 3, 04:35 UTCJul 3, 05:30 UTC55m
2026-07-03 TAY5IX CDG → CPH Jul 3, 01:55 UTCJul 3, 03:25 UTC1h 30m

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

Mode-S 44A6E4 frequently asked

What is Mode-S code 44A6E4?
44A6E4 is an ICAO 24-bit transponder address. Allocated to Belgium. Assigned to OO-IWD.
Where is Mode-S 44A6E4 registered?
Mode-S code 44A6E4 is allocated to Belgium (BE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 44A6E4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 44A6E4, octal 21123344, decimal 4,499,172.
What flights does 44A6E4 operate?
Mode-S 44A6E4 has broadcast 20 distinct callsigns, including TAY6SF, TAY3SF, TAY6IX, TAY5IX, TAY5TR.