Apparatus

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sensors Mode-S transponder

4D23F0

ICAO 24-bit transponder address · allocated to Malta

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

Hex
4D23F0
Octal
23221760
Decimal
5,055,472
Country
MT
Tail
9H-GEF
Type
B738
No current signal · last broadcast 6h ago
Flights observed
575
Distinct callsigns
20
Country
MT
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 4D23F0.

Country allocation

The ICAO 24-bit address 4D23F0 falls within the block assigned to Malta (MT) by ICAO Annex 10, Volume III. Every aircraft registered in Malta 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
AEZ8094 - 14 2026-06-18
AEZ44LG - 13 2026-06-18
AEZ419P - 13 2026-06-24
AEZ418P Aerial Transit Company 13 2026-06-10
AEZ413P - 13 2026-06-24
AEZ146R Aerial Transit Company 13 2026-06-23
AEZ145N Aerial Transit Company 13 2026-06-10
AEZ141W - 13 2026-06-24
AEZ500Q - 12 2026-07-10
AEZ2347 Aerial Transit Company 12 2026-07-02
AEZ569P - 11 2026-07-13
AEZ47LG - 11 2026-06-18
AEZ40GR - 11 2026-07-10
AEZ88LL Aerial Transit Company 10 2026-06-18
AEZ31TR - 10 2026-07-03
AEZ2617 - 10 2026-07-13
AEZ158C - 10 2026-06-23
AEZ157Q Aerial Transit Company 10 2026-06-22
AEZ519C Aerial Transit Company 9 2026-06-23
AEZ516C - 9 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 AEZ2617 - Jul 13, 19:35 UTCJul 13, 20:10 UTC35m
2026-07-13 AEZ7816 OLB → FCO Jul 13, 17:45 UTCJul 13, 18:20 UTC35m
2026-07-13 AEZ569P - Jul 13, 15:45 UTCJul 13, 16:20 UTC35m
2026-07-13 AEZ311L OLB → FCO Jul 13, 14:00 UTCJul 13, 14:30 UTC30m
2026-07-13 AEZ131R FCO → OLB Jul 13, 12:10 UTCJul 13, 12:40 UTC30m
2026-07-13 AEZ2424 - Jul 13, 10:20 UTCJul 13, 11:00 UTC40m
2026-07-13 AEZ2425 - Jul 13, 08:40 UTCJul 13, 09:25 UTC45m
2026-07-13 AEZ7810 - Jul 13, 05:20 UTCJul 13, 05:45 UTC25m
2026-07-12 AEZ839Y - Jul 12, 19:01 UTCJul 12, 19:55 UTC55m
2026-07-12 AEZ385Z - Jul 12, 17:10 UTCJul 12, 17:55 UTC45m
2026-07-12 AEZ2631 LIN → OLB Jul 12, 15:20 UTCJul 12, 16:10 UTC50m
2026-07-12 AEZ2630 - Jul 12, 13:20 UTCJul 12, 14:05 UTC45m
2026-07-12 AEZ2629 - Jul 12, 11:20 UTCJul 12, 12:15 UTC55m
2026-07-12 AEZ2628 - Jul 12, 09:10 UTCJul 12, 09:55 UTC45m
2026-07-11 AEZ833J LIN → OLB Jul 11, 23:00 UTCJul 11, 23:50 UTC50m
2026-07-11 AEZ29JD OLB → LIN Jul 11, 21:25 UTCJul 11, 22:10 UTC45m
2026-07-11 AEZ835L LIN → OLB Jul 11, 19:40 UTCJul 11, 19:55 UTC15m
2026-07-11 AEZ835L LIN → OLB Jul 11, 13:35 UTCJul 11, 15:05 UTC1h 30m
2026-07-11 AEZ41ST - Jul 11, 11:00 UTCJul 11, 12:00 UTC1h 0m
2026-07-11 AEZ8662 - Jul 11, 08:40 UTCJul 11, 09:40 UTC1h 0m
2026-07-11 AEZ389L - Jul 11, 05:05 UTCJul 11, 05:45 UTC40m
2026-07-10 AEZ2617 - Jul 10, 20:00 UTCJul 10, 20:35 UTC35m
2026-07-10 AEZ7816 OLB → FCO Jul 10, 18:00 UTCJul 10, 18:25 UTC25m
2026-07-10 AEZ569P - Jul 10, 15:50 UTCJul 10, 16:20 UTC30m
2026-07-10 AEZ11GR - Jul 10, 11:25 UTCJul 10, 12:15 UTC50m
2026-07-10 AEZ500Q - Jul 10, 09:40 UTCJul 10, 10:20 UTC40m
2026-07-10 AEZ40GR - Jul 10, 07:15 UTCJul 10, 08:00 UTC45m
2026-07-10 AEZ100N - Jul 10, 05:15 UTCJul 10, 06:00 UTC45m
2026-07-09 AEZ70MH - Jul 9, 18:35 UTCJul 9, 19:15 UTC40m
2026-07-09 AEZ12RG - Jul 9, 15:55 UTCJul 9, 16:25 UTC30m
2026-07-09 AEZ22LO - Jul 9, 14:10 UTCJul 9, 14:50 UTC40m
2026-07-09 AEZ8765 - Jul 9, 11:45 UTCJul 9, 12:35 UTC50m
2026-07-09 AEZ41ST - Jul 9, 09:35 UTCJul 9, 10:35 UTC1h 0m
2026-07-09 AEZ100N - Jul 9, 05:30 UTCJul 9, 06:05 UTC35m
2026-07-08 AEZ2348 - Jul 8, 19:50 UTCJul 8, 20:30 UTC40m
2026-07-08 AEZ500Q - Jul 8, 09:15 UTCJul 8, 10:00 UTC45m
2026-07-08 AEZ40GR - Jul 8, 07:15 UTCJul 8, 07:55 UTC40m
2026-07-08 AEZ100N - Jul 8, 05:30 UTCJul 8, 06:05 UTC35m
2026-07-07 AEZ2616 - Jul 7, 19:40 UTCJul 7, 20:10 UTC30m
2026-07-07 AEZ833J LIN → OLB Jul 7, 16:50 UTCJul 7, 17:45 UTC55m
2026-07-07 AEZ29JD OLB → LIN Jul 7, 14:40 UTCJul 7, 15:30 UTC50m
2026-07-07 AEZ131R FCO → OLB Jul 7, 11:45 UTCJul 7, 12:20 UTC35m
2026-07-07 AEZ7812 - Jul 7, 09:45 UTCJul 7, 10:20 UTC35m
2026-07-07 AEZ139V - Jul 7, 07:45 UTCJul 7, 08:25 UTC40m
2026-07-07 AEZ7810 - Jul 7, 05:10 UTCJul 7, 05:45 UTC35m
2026-07-06 AEZ7341 LIN → OLB Jul 6, 20:45 UTCJul 6, 21:30 UTC45m
2026-07-06 AEZ7340 - Jul 6, 18:50 UTCJul 6, 19:40 UTC50m
2026-07-06 AEZ833J LIN → OLB Jul 6, 16:50 UTCJul 6, 17:45 UTC55m
2026-07-06 AEZ29JD OLB → LIN Jul 6, 14:40 UTCJul 6, 15:30 UTC50m
2026-07-06 AEZ835L LIN → OLB Jul 6, 12:15 UTCJul 6, 13:05 UTC50m

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

Mode-S 4D23F0 frequently asked

What is Mode-S code 4D23F0?
4D23F0 is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-GEF.
Where is Mode-S 4D23F0 registered?
Mode-S code 4D23F0 is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D23F0 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D23F0, octal 23221760, decimal 5,055,472.
What flights does 4D23F0 operate?
Mode-S 4D23F0 has broadcast 20 distinct callsigns, including AEZ8094, AEZ44LG, AEZ419P, AEZ418P, AEZ413P.