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sensors Mode-S transponder

4D23A7

ICAO 24-bit transponder address · allocated to Malta

Currently assigned to 9H-XFX · EMBRAER EMB-505 Phenom 300

Hex
4D23A7
Octal
23221647
Decimal
5,055,399
Country
MT
Tail
9H-XFX
Type
E55P
No current signal · last broadcast Jul 26, 17:20 UTC
Flights observed
221
Distinct callsigns
2
Country
MT
Last broadcast
Jul 26, 17:20 UTC

Last known position

Most recent position reported by Mode-S 4D23A7.

Country allocation

The ICAO 24-bit address 4D23A7 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 2 distinct

Callsign Airline Flights Last seen
FJO53F - 219 2026-07-26
FJO66L - 2 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FJO53F - Jul 26, 15:50 UTCJul 26, 17:20 UTC1h 30m
2026-07-26 FJO53F - Jul 26, 12:05 UTCJul 26, 14:25 UTC2h 20m
2026-07-26 FJO53F - Jul 26, 09:10 UTCJul 26, 09:55 UTC45m
2026-07-25 FJO53F - Jul 25, 10:00 UTCJul 25, 11:15 UTC1h 15m
2026-07-25 FJO53F - Jul 25, 06:50 UTCJul 25, 08:35 UTC1h 45m
2026-07-24 FJO53F LCY → ATH Jul 24, 17:50 UTCJul 24, 20:45 UTC2h 55m
2026-07-24 FJO53F DUB → LCY Jul 24, 15:20 UTCJul 24, 16:20 UTC1h 0m
2026-07-23 FJO53F LCY → DUB Jul 23, 16:50 UTCJul 23, 17:50 UTC1h 0m
2026-07-23 FJO53F GVA → LCY Jul 23, 12:30 UTCJul 23, 13:40 UTC1h 10m
2026-07-23 FJO53F LIN → GVA Jul 23, 10:40 UTCJul 23, 11:20 UTC40m
2026-07-21 FJO53F CEQ → LIN Jul 21, 17:05 UTCJul 21, 17:40 UTC35m
2026-07-21 FJO53F - Jul 21, 15:15 UTCJul 21, 16:10 UTC55m
2026-07-21 FJO53F - Jul 21, 12:30 UTCJul 21, 13:30 UTC1h 0m
2026-07-19 FJO53F - Jul 19, 07:45 UTCJul 19, 09:40 UTC1h 55m
2026-07-18 FJO53F LIN → HAM Jul 18, 10:20 UTCJul 18, 11:40 UTC1h 20m
2026-07-17 FJO53F - Jul 17, 18:05 UTCJul 17, 19:25 UTC1h 20m
2026-07-17 FJO53F - Jul 17, 14:15 UTCJul 17, 16:34 UTC2h 20m
2026-07-17 FJO53F PRG → LTN Jul 17, 09:25 UTCJul 17, 11:00 UTC1h 35m
2026-07-16 FJO53F - Jul 16, 15:30 UTCJul 16, 16:30 UTC1h 0m
2026-07-16 FJO53F LIN → LUG Jul 16, 13:20 UTCJul 16, 13:34 UTC15m
2026-07-14 FJO53F - Jul 14, 11:30 UTCJul 14, 12:20 UTC50m
2026-07-14 FJO53F - Jul 14, 09:10 UTCJul 14, 10:05 UTC55m
2026-07-13 FJO53F - Jul 13, 13:30 UTCJul 13, 15:50 UTC2h 20m
2026-07-13 FJO53F - Jul 13, 10:20 UTCJul 13, 12:25 UTC2h 5m
2026-07-13 FJO53F TIV → LJU Jul 13, 07:55 UTCJul 13, 08:45 UTC50m
2026-07-12 FJO66L - Jul 12, 15:15 UTCJul 12, 15:35 UTC20m
2026-07-12 FJO66L BRI → BEG Jul 12, 12:05 UTCJul 12, 12:55 UTC50m
2026-07-12 FJO53F - Jul 12, 09:35 UTCJul 12, 10:35 UTC1h 0m
2026-07-12 FJO53F - Jul 12, 07:10 UTCJul 12, 08:30 UTC1h 20m
2026-07-12 FJO53F - Jul 12, 03:45 UTCJul 12, 05:01 UTC1h 15m
2026-07-12 FJO53F - Jul 12, 01:30 UTCJul 12, 02:05 UTC35m
2026-07-11 FJO53F - Jul 11, 10:35 UTCJul 11, 11:20 UTC45m
2026-07-11 FJO53F - Jul 11, 08:25 UTCJul 11, 09:40 UTC1h 15m
2026-07-11 FJO53F - Jul 11, 04:40 UTCJul 11, 06:20 UTC1h 40m
2026-07-10 FJO53F - Jul 10, 10:20 UTCJul 10, 12:45 UTC2h 25m
2026-07-10 FJO53F - Jul 10, 08:25 UTCJul 10, 09:15 UTC50m
2026-07-10 FJO53F - Jul 10, 06:40 UTCJul 10, 07:20 UTC40m
2026-07-09 FJO53F - Jul 9, 10:50 UTCJul 9, 11:15 UTC25m
2026-07-09 FJO53F - Jul 9, 08:15 UTCJul 9, 09:40 UTC1h 25m
2026-07-08 FJO53F - Jul 8, 15:20 UTCJul 8, 16:45 UTC1h 25m
2026-07-08 FJO53F TRN → TRN Jul 8, 12:45 UTCJul 8, 13:20 UTC35m
2026-07-08 FJO53F - Jul 8, 11:15 UTCJul 8, 11:55 UTC40m
2026-07-08 FJO53F - Jul 8, 09:45 UTCJul 8, 10:20 UTC35m
2026-07-07 FJO53F LIN → PSA Jul 7, 15:20 UTCJul 7, 15:50 UTC30m
2026-07-07 FJO53F ANR → LIN Jul 7, 11:55 UTCJul 7, 12:55 UTC1h 0m
2026-07-07 FJO53F - Jul 7, 09:15 UTCJul 7, 10:35 UTC1h 20m
2026-07-06 FJO53F - Jul 6, 16:00 UTCJul 6, 16:55 UTC55m
2026-07-06 FJO53F - Jul 6, 12:35 UTCJul 6, 14:20 UTC1h 45m
2026-07-06 FJO53F - Jul 6, 07:15 UTCJul 6, 08:55 UTC1h 40m
2026-07-05 FJO53F - Jul 5, 16:45 UTCJul 5, 17:15 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-XFX page for operator, model, and routing details .

Mode-S 4D23A7 frequently asked

What is Mode-S code 4D23A7?
4D23A7 is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-XFX.
Where is Mode-S 4D23A7 registered?
Mode-S code 4D23A7 is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D23A7 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 17:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D23A7, octal 23221647, decimal 5,055,399.
What flights does 4D23A7 operate?
Mode-S 4D23A7 has broadcast 2 distinct callsigns, including FJO53F, FJO66L.