Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 Jul 26, 19:15 UTC
Flights observed
653
Distinct callsigns
20
Country
MT
Last broadcast
Jul 26, 19:15 UTC

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
AEZ418P - 19 2026-07-25
AEZ145N - 19 2026-07-25
AEZ419P Aerial Transit Company 17 2026-07-25
AEZ413P Aerial Transit Company 17 2026-07-25
AEZ146R - 17 2026-07-24
AEZ141W Aerial Transit Company 17 2026-07-25
AEZ8094 - 14 2026-06-18
AEZ500Q - 14 2026-07-19
AEZ44LG - 13 2026-06-18
AEZ40GR - 13 2026-07-19
AEZ2347 Aerial Transit Company 13 2026-07-16
AEZ569P - 11 2026-07-13
AEZ47LG - 11 2026-06-18
AEZ31TR Aerial Transit Company 11 2026-07-26
AEZ2617 - 11 2026-07-20
AEZ158C Aerial Transit Company 11 2026-07-26
AEZ11GR - 11 2026-07-19
AEZ100N Aerial Transit Company 11 2026-07-19
AEZ88LL Aerial Transit Company 10 2026-06-18
AEZ519C Aerial Transit Company 10 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AEZ519C CTA → FCO Jul 26, 18:20 UTCJul 26, 19:15 UTC55m
2026-07-26 AEZ2824 BGY → CTA Jul 26, 15:20 UTCJul 26, 16:45 UTC1h 25m
2026-07-26 AEZ2825 CTA → BGY Jul 26, 12:45 UTCJul 26, 14:10 UTC1h 25m
2026-07-26 AEZ158C FCO → CTA Jul 26, 10:35 UTCJul 26, 11:25 UTC50m
2026-07-26 AEZ31TR OLB → FCO Jul 26, 07:50 UTCJul 26, 08:25 UTC35m
2026-07-26 AEZ7811 FCO → OLB Jul 26, 05:55 UTCJul 26, 06:20 UTC25m
2026-07-25 AEZ418P - Jul 25, 17:20 UTCJul 25, 18:10 UTC50m
2026-07-25 AEZ145N - Jul 25, 14:20 UTCJul 25, 14:55 UTC35m
2026-07-25 AEZ413P PMO → FCO Jul 25, 10:00 UTCJul 25, 10:45 UTC45m
2026-07-25 AEZ141W FCO → PMO Jul 25, 08:05 UTCJul 25, 08:40 UTC35m
2026-07-25 AEZ419P PMO → FCO Jul 25, 05:30 UTCJul 25, 06:20 UTC50m
2026-07-24 AEZ146R - Jul 24, 20:15 UTCJul 24, 20:45 UTC30m
2026-07-24 AEZ418P - Jul 24, 18:30 UTCJul 24, 19:20 UTC50m
2026-07-24 AEZ145N - Jul 24, 16:50 UTCJul 24, 17:30 UTC40m
2026-07-24 AEZ413P - Jul 24, 14:50 UTCJul 24, 15:35 UTC45m
2026-07-24 AEZ141W - Jul 24, 12:50 UTCJul 24, 13:35 UTC45m
2026-07-24 AEZ514C - Jul 24, 10:10 UTCJul 24, 11:20 UTC1h 10m
2026-07-24 AEZ155Z FCO → CTA Jul 24, 08:05 UTCJul 24, 08:50 UTC45m
2026-07-24 AEZ419P PMO → FCO Jul 24, 05:35 UTCJul 24, 06:25 UTC50m
2026-07-23 AEZ146R - Jul 23, 19:50 UTCJul 23, 20:30 UTC40m
2026-07-23 AEZ418P - Jul 23, 18:05 UTCJul 23, 18:45 UTC40m
2026-07-23 AEZ145N - Jul 23, 14:30 UTCJul 23, 15:35 UTC1h 5m
2026-07-23 AEZ60RG CAG → FCO Jul 23, 10:00 UTCJul 23, 10:50 UTC50m
2026-07-23 AEZ7117 - Jul 23, 08:20 UTCJul 23, 09:00 UTC40m
2026-07-23 AEZ20GR CAG → FCO Jul 23, 05:50 UTCJul 23, 06:25 UTC35m
2026-07-22 AEZ11LJ FCO → CAG Jul 22, 17:00 UTCJul 22, 17:25 UTC25m
2026-07-22 AEZ214R AHO → FCO Jul 22, 14:45 UTCJul 22, 15:20 UTC35m
2026-07-22 AEZ126F FCO → AHO Jul 22, 12:15 UTCJul 22, 12:50 UTC35m
2026-07-21 AEZ2519 - Jul 21, 20:05 UTCJul 21, 20:40 UTC35m
2026-07-21 AEZ7816 OLB → FCO Jul 21, 18:15 UTCJul 21, 18:40 UTC25m
2026-07-21 AEZ2631 LIN → OLB Jul 21, 14:30 UTCJul 21, 15:20 UTC50m
2026-07-21 AEZ2630 OLB → LIN Jul 21, 12:25 UTCJul 21, 13:10 UTC45m
2026-07-21 AEZ2629 LIN → OLB Jul 21, 09:35 UTCJul 21, 10:30 UTC55m
2026-07-21 AEZ2628 OLB → LIN Jul 21, 07:40 UTCJul 21, 08:30 UTC50m
2026-07-20 AEZ2617 - Jul 20, 20:00 UTCJul 20, 20:25 UTC25m
2026-07-20 AEZ418P - Jul 20, 14:20 UTCJul 20, 15:15 UTC55m
2026-07-20 AEZ145N - Jul 20, 12:25 UTCJul 20, 13:05 UTC40m
2026-07-20 AEZ413P - Jul 20, 09:55 UTCJul 20, 10:40 UTC45m
2026-07-20 AEZ141W - Jul 20, 08:05 UTCJul 20, 08:45 UTC40m
2026-07-20 AEZ419P PMO → FCO Jul 20, 05:30 UTCJul 20, 06:15 UTC45m
2026-07-19 AEZ146R - Jul 19, 20:10 UTCJul 19, 20:50 UTC40m
2026-07-19 AEZ418P - Jul 19, 17:55 UTCJul 19, 18:40 UTC45m
2026-07-19 AEZ145N - Jul 19, 16:20 UTCJul 19, 17:00 UTC40m
2026-07-19 AEZ11GR - Jul 19, 11:25 UTCJul 19, 11:55 UTC30m
2026-07-19 AEZ500Q - Jul 19, 09:20 UTCJul 19, 09:45 UTC25m
2026-07-19 AEZ40GR - Jul 19, 07:15 UTCJul 19, 07:55 UTC40m
2026-07-19 AEZ100N FCO → CAG Jul 19, 05:15 UTCJul 19, 05:45 UTC30m
2026-07-18 AEZ2616 - Jul 18, 19:40 UTCJul 18, 20:05 UTC25m
2026-07-18 AEZ7817 FCO → OLB Jul 18, 17:45 UTCJul 18, 18:10 UTC25m
2026-07-18 AEZ7814 - Jul 18, 15:50 UTCJul 18, 16:20 UTC30m

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 Jul 26, 19:15 UTC.
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 AEZ418P, AEZ145N, AEZ419P, AEZ413P, AEZ146R.