sensors Mode-S transponder

4D23F8

ICAO 24-bit transponder address · allocated to Malta

Currently assigned to 9H-VVD · BOEING 737 MAX 8

Hex
4D23F8
Octal
23221770
Decimal
5,055,480
Country
MT
Tail
9H-VVD
Type
B38M
No current signal · last broadcast 14h ago
Flights observed
16
Distinct callsigns
12
Country
MT
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S 4D23F8.

Country allocation

The ICAO 24-bit address 4D23F8 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 12 distinct

Callsign Airline Flights Last seen
RYR96TQ - 2 2026-04-13
RYR58SV - 2 2026-04-14
RYR45TN - 2 2026-04-13
RYR3SG - 2 2026-04-13
RYR8AD - 1 2026-04-13
RYR765L Ryanair 1 2026-04-13
RYR65HL - 1 2026-04-12
RYR52TC - 1 2026-04-13
RYR431F - 1 2026-04-13
RYR18FU - 1 2026-04-14
RYR1536 - 1 2026-04-13
RYR115D Ryanair 1 2026-04-12

Recent flights last 16

DateFlightRouteTakeoffLandingDuration
2026-04-14 RYR58SV - Apr 14, 09:10 UTCApr 14, 11:05 UTC1h 55m
2026-04-14 RYR58SV - Apr 14, 08:05 UTCApr 14, 09:05 UTC1h 0m
2026-04-14 RYR18FU - Apr 14, 05:15 UTCApr 14, 07:05 UTC1h 50m
2026-04-13 RYR52TC - Apr 13, 21:20 UTCApr 13, 22:50 UTC1h 30m
2026-04-13 RYR3SG - Apr 13, 19:50 UTCApr 13, 20:15 UTC25m
2026-04-13 RYR3SG - Apr 13, 18:40 UTCApr 13, 20:10 UTC1h 30m
2026-04-13 RYR8AD - Apr 13, 16:25 UTCApr 13, 17:50 UTC1h 25m
2026-04-13 RYR1536 - Apr 13, 14:05 UTCApr 13, 15:30 UTC1h 25m
2026-04-13 RYR96TQ - Apr 13, 11:55 UTCApr 13, 12:25 UTC30m
2026-04-13 RYR96TQ - Apr 13, 10:45 UTCApr 13, 12:15 UTC1h 30m
2026-04-13 RYR431F - Apr 13, 08:20 UTCApr 13, 09:55 UTC1h 35m
2026-04-13 RYR765L BDS → BGY Apr 13, 06:25 UTCApr 13, 07:25 UTC1h 0m
2026-04-13 RYR45TN - Apr 13, 04:20 UTCApr 13, 05:10 UTC50m
2026-04-13 RYR45TN - Apr 13, 04:10 UTCApr 13, 05:10 UTC1h 0m
2026-04-12 RYR65HL - Apr 12, 19:45 UTCApr 12, 20:15 UTC30m
2026-04-12 RYR115D PRG → BGY Apr 12, 17:45 UTCApr 12, 18:50 UTC1h 5m

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

Mode-S 4D23F8 frequently asked

What is Mode-S code 4D23F8?
4D23F8 is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-VVD.
Where is Mode-S 4D23F8 registered?
Mode-S code 4D23F8 is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D23F8 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D23F8, octal 23221770, decimal 5,055,480.
What flights does 4D23F8 operate?
Mode-S 4D23F8 has broadcast 12 distinct callsigns, including RYR96TQ, RYR58SV, RYR45TN, RYR3SG, RYR8AD.