Apparatus

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sensors Mode-S transponder

4D2508

ICAO 24-bit transponder address

Currently assigned to 9H-BRU · BOEING 737-800

Hex
4D2508
Octal
23222410
Decimal
5,055,752
Tail
9H-BRU
Type
B738
No current signal · last broadcast 5h ago
Flights observed
290
Distinct callsigns
20
Country
-
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 4D2508.

Callsign history 20 distinct

Callsign Airline Flights Last seen
AEZ11LJ Aerial Transit Company 7 2026-07-16
AEZ839Y - 6 2026-07-19
AEZ836S - 6 2026-06-30
AEZ7816 Aerial Transit Company 6 2026-07-08
AEZ569P - 6 2026-07-19
AEZ49KF - 6 2026-07-07
AEZ385Z - 6 2026-07-19
AEZ2629 - 6 2026-07-15
AEZ2628 - 6 2026-07-15
AEZ2367 - 6 2026-07-07
AEZ2348 - 6 2026-07-22
AEZ835L - 5 2026-07-19
AEZ7812 - 5 2026-07-16
AEZ7810 - 5 2026-07-16
AEZ38TM - 5 2026-06-28
AEZ389L Aerial Transit Company 5 2026-07-20
AEZ311L Aerial Transit Company 5 2026-07-19
AEZ2631 Aerial Transit Company 5 2026-07-15
AEZ2630 - 5 2026-07-15
AEZ2617 - 5 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 AEZ2575 - Jul 24, 16:50 UTCJul 24, 18:15 UTC1h 25m
2026-07-24 AEZ2574 - Jul 24, 14:05 UTCJul 24, 15:30 UTC1h 25m
2026-07-24 AEZ60RG CAG → FCO Jul 24, 10:20 UTCJul 24, 11:05 UTC45m
2026-07-24 AEZ7117 - Jul 24, 08:40 UTCJul 24, 09:05 UTC25m
2026-07-24 AEZ516C CTA → FCO Jul 24, 05:00 UTCJul 24, 06:05 UTC1h 5m
2026-07-23 AEZ157Q FCO → CTA Jul 23, 19:40 UTCJul 23, 20:25 UTC45m
2026-07-23 AEZ519C - Jul 23, 17:30 UTCJul 23, 18:30 UTC1h 0m
2026-07-23 AEZ158C - Jul 23, 14:15 UTCJul 23, 14:55 UTC40m
2026-07-23 AEZ514C - Jul 23, 09:45 UTCJul 23, 10:50 UTC1h 5m
2026-07-23 AEZ155Z - Jul 23, 07:35 UTCJul 23, 08:20 UTC45m
2026-07-22 AEZ2348 - Jul 22, 20:00 UTCJul 22, 20:35 UTC35m
2026-07-22 AEZ2347 FCO → CAG Jul 22, 18:05 UTCJul 22, 18:35 UTC30m
2026-07-22 AEZ516C - Jul 22, 05:05 UTCJul 22, 05:25 UTC20m
2026-07-21 AEZ157Q - Jul 21, 19:55 UTCJul 21, 20:45 UTC50m
2026-07-21 AEZ419P PMO → FCO Jul 21, 05:30 UTCJul 21, 06:15 UTC45m
2026-07-20 AEZ146R - Jul 20, 19:40 UTCJul 20, 20:20 UTC40m
2026-07-20 AEZ2575 - Jul 20, 16:50 UTCJul 20, 18:20 UTC1h 30m
2026-07-20 AEZ2574 - Jul 20, 13:35 UTCJul 20, 15:10 UTC1h 35m
2026-07-20 AEZ60RG - Jul 20, 10:05 UTCJul 20, 10:45 UTC40m
2026-07-20 AEZ8662 CAG → FCO Jul 20, 07:45 UTCJul 20, 08:35 UTC50m
2026-07-20 AEZ389L OLB → LIN Jul 20, 05:25 UTCJul 20, 06:15 UTC50m
2026-07-19 AEZ839Y - Jul 19, 20:00 UTCJul 19, 20:45 UTC45m
2026-07-19 AEZ385Z - Jul 19, 18:25 UTCJul 19, 19:05 UTC40m
2026-07-19 AEZ569P - Jul 19, 16:20 UTCJul 19, 16:45 UTC25m
2026-07-19 AEZ311L OLB → FCO Jul 19, 14:50 UTCJul 19, 15:15 UTC25m
2026-07-19 AEZ835L - Jul 19, 12:15 UTCJul 19, 13:00 UTC45m
2026-07-19 AEZ41ST - Jul 19, 10:00 UTCJul 19, 11:05 UTC1h 5m
2026-07-19 AEZ8662 CAG → FCO Jul 19, 07:25 UTCJul 19, 08:25 UTC1h 0m
2026-07-19 AEZ389L OLB → LIN Jul 19, 05:20 UTCJul 19, 06:15 UTC55m
2026-07-18 AEZ839Y LIN → OLB Jul 18, 19:30 UTCJul 18, 20:20 UTC50m
2026-07-18 AEZ385Z OLB → LIN Jul 18, 17:50 UTCJul 18, 18:30 UTC40m
2026-07-18 AEZ569P - Jul 18, 15:45 UTCJul 18, 16:10 UTC25m
2026-07-18 AEZ318W - Jul 18, 12:00 UTCJul 18, 12:30 UTC30m
2026-07-18 AEZ7813 FCO → OLB Jul 18, 09:50 UTCJul 18, 10:35 UTC45m
2026-07-18 AEZ217A AHO → FCO Jul 18, 07:50 UTCJul 18, 08:30 UTC40m
2026-07-18 AEZ122X - Jul 18, 06:20 UTCJul 18, 06:55 UTC35m
2026-07-17 AEZ2348 - Jul 17, 20:20 UTCJul 17, 20:55 UTC35m
2026-07-17 AEZ2363 - Jul 17, 18:15 UTCJul 17, 19:05 UTC50m
2026-07-17 AEZ14UJ - Jul 17, 16:00 UTCJul 17, 16:59 UTC1h 0m
2026-07-17 AEZ88LL LIN → CAG Jul 17, 13:20 UTCJul 17, 14:15 UTC55m
2026-07-17 AEZ47LG - Jul 17, 11:00 UTCJul 17, 11:55 UTC55m
2026-07-17 AEZ8094 LIN → CAG Jul 17, 08:30 UTCJul 17, 09:25 UTC55m
2026-07-17 AEZ44LG - Jul 17, 06:20 UTCJul 17, 07:14 UTC55m
2026-07-16 AEZ11LJ FCO → CAG Jul 16, 16:25 UTCJul 16, 16:55 UTC30m
2026-07-16 AEZ7812 - Jul 16, 09:35 UTCJul 16, 10:04 UTC30m
2026-07-16 AEZ139V - Jul 16, 07:35 UTCJul 16, 08:05 UTC30m
2026-07-16 AEZ7810 - Jul 16, 05:10 UTCJul 16, 05:40 UTC30m
2026-07-15 AEZ839Y LIN → OLB Jul 15, 20:00 UTCJul 15, 20:45 UTC45m
2026-07-15 AEZ385Z - Jul 15, 17:40 UTCJul 15, 18:45 UTC1h 5m
2026-07-15 AEZ2631 LIN → OLB Jul 15, 14:40 UTCJul 15, 15:40 UTC1h 0m

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 9H-BRU page for operator, model, and routing details .

Mode-S 4D2508 frequently asked

What is Mode-S code 4D2508?
4D2508 is an ICAO 24-bit transponder address. Assigned to 9H-BRU.
Is 4D2508 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D2508, octal 23222410, decimal 5,055,752.
What flights does 4D2508 operate?
Mode-S 4D2508 has broadcast 20 distinct callsigns, including AEZ11LJ, AEZ839Y, AEZ836S, AEZ7816, AEZ569P.