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 43m ago
Flights observed
203
Distinct callsigns
20
Country
BE
Last broadcast
43m ago

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 - 40 2026-07-06
TAY3SF - 32 2026-07-14
TAY6IX - 23 2026-07-03
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
TAY7VC - 5 2026-05-29
TAY9VX - 4 2026-05-29
TAY3WZ - 4 2026-06-14
TAY1KU - 4 2026-06-28
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
2026-07-14 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
2026-07-02 TAY6IX - Jul 2, 19:55 UTCJul 2, 22:00 UTC2h 5m
2026-07-02 TAY6IX RIX → WAW Jul 2, 17:45 UTCJul 2, 18:45 UTC1h 0m
2026-07-02 TAY5IX - Jul 2, 04:40 UTCJul 2, 05:40 UTC1h 0m
2026-07-02 TAY5IX - Jul 2, 02:10 UTCJul 2, 03:35 UTC1h 25m
2026-07-01 TAY6IX - Jul 1, 19:45 UTCJul 1, 21:45 UTC2h 0m
2026-07-01 TAY6IX - Jul 1, 17:45 UTCJul 1, 18:45 UTC1h 0m
2026-07-01 TAY5IX - Jul 1, 04:30 UTCJul 1, 05:30 UTC1h 0m
2026-07-01 TAY5IX CDG → CPH Jul 1, 01:55 UTCJul 1, 03:15 UTC1h 20m
2026-06-30 TAY6IX - Jun 30, 19:45 UTCJun 30, 21:55 UTC2h 10m
2026-06-30 TAY6IX - Jun 30, 17:40 UTCJun 30, 18:50 UTC1h 10m
2026-06-30 TAY5IX - Jun 30, 04:35 UTCJun 30, 05:35 UTC1h 0m
2026-06-30 TAY5IX - Jun 30, 02:00 UTCJun 30, 03:20 UTC1h 20m
2026-06-29 TAY6IX - Jun 29, 20:00 UTCJun 29, 21:54 UTC1h 55m
2026-06-29 TAY6IX RIX → WAW Jun 29, 17:45 UTCJun 29, 18:44 UTC1h 0m
2026-06-28 TAY1KU - Jun 28, 19:59 UTCJun 28, 20:59 UTC1h 0m
2026-06-28 TAY1KU - Jun 28, 17:19 UTCJun 28, 18:49 UTC1h 30m
2026-06-26 TAY6SF - Jun 26, 19:14 UTCJun 26, 21:59 UTC2h 45m
2026-06-26 TAY6SF - Jun 26, 17:35 UTCJun 26, 18:09 UTC35m
2026-06-26 TAY3SF - Jun 26, 06:15 UTCJun 26, 06:39 UTC25m
2026-06-26 TAY3SF - Jun 26, 03:05 UTCJun 26, 05:24 UTC2h 20m
2026-06-25 TAY6SF - Jun 25, 19:09 UTCJun 25, 21:50 UTC2h 40m
2026-06-25 TAY6SF - Jun 25, 17:30 UTCJun 25, 18:00 UTC30m
2026-06-25 TAY3SF - Jun 25, 06:20 UTCJun 25, 06:50 UTC30m
2026-06-25 TAY3SF - Jun 25, 02:49 UTCJun 25, 05:20 UTC2h 30m
2026-06-24 TAY6SF - Jun 24, 19:20 UTCJun 24, 22:10 UTC2h 50m
2026-06-24 TAY6SF - Jun 24, 17:34 UTCJun 24, 18:05 UTC30m
2026-06-24 TAY3SF - Jun 24, 06:25 UTCJun 24, 06:45 UTC20m
2026-06-24 TAY3SF CDG → OTP Jun 24, 03:04 UTCJun 24, 05:24 UTC2h 20m
2026-06-23 TAY6SF - Jun 23, 19:15 UTCJun 23, 21:49 UTC2h 35m
2026-06-23 TAY6SF - Jun 23, 17:30 UTCJun 23, 18:10 UTC40m
2026-06-23 TAY3SF - Jun 23, 06:19 UTCJun 23, 06:49 UTC30m
2026-06-23 TAY3SF CDG → OTP Jun 23, 03:00 UTCJun 23, 05:24 UTC2h 25m

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 43m ago.
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.