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 Jul 26, 20:40 UTC
Flights observed
603
Distinct callsigns
20
Country
MT
Last broadcast
Jul 26, 20:40 UTC

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 20 distinct

Callsign Airline Flights Last seen
RYR85ZR Ryanair 5 2026-05-08
RYR82 Ryanair 5 2026-05-09
RYR22PF Ryanair 5 2026-05-09
RYR1JK Ryanair 5 2026-05-08
RYR9JW Ryanair 4 2026-07-25
RYR8QX Ryanair 4 2026-05-11
RYR892M Ryanair 4 2026-05-10
RYR8417 Ryanair 4 2026-05-11
RYR4KR Ryanair 4 2026-07-25
RYR3VL Ryanair 4 2026-05-10
RYR9NZ - 3 2026-07-14
RYR921Q - 3 2026-06-21
RYR8HG Ryanair 3 2026-06-21
RYR84PJ - 3 2026-06-25
RYR7R - 3 2026-06-23
RYR6QA - 3 2026-06-21
RYR62WF Ryanair 3 2026-06-19
RYR5UG - 3 2026-07-14
RYR58SV - 3 2026-04-14
RYR4EV - 3 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR1JN ALC → PIK Jul 26, 19:25 UTCJul 26, 20:40 UTC1h 15m
2026-07-26 RYR209J AGP → MAH Jul 26, 17:15 UTCJul 26, 18:20 UTC1h 5m
2026-07-26 RYR9RL - Jul 26, 14:05 UTCJul 26, 16:10 UTC2h 5m
2026-07-26 RYR618X AGP → CWL Jul 26, 11:00 UTCJul 26, 13:20 UTC2h 20m
2026-07-26 RYR7SW DUB → LUZ Jul 26, 07:20 UTCJul 26, 09:30 UTC2h 10m
2026-07-26 RYR34LM HHN → KIR Jul 26, 04:00 UTCJul 26, 06:30 UTC2h 30m
2026-07-25 RYR1SJ EIN → AGP Jul 25, 18:10 UTCJul 25, 22:10 UTC4h 0m
2026-07-25 RYR63XT - Jul 25, 13:25 UTCJul 25, 17:10 UTC3h 45m
2026-07-25 RYR9JW LPL → ALC Jul 25, 09:20 UTCJul 25, 12:05 UTC2h 45m
2026-07-25 RYR4KR AGP → EIN Jul 25, 05:55 UTCJul 25, 08:15 UTC2h 20m
2026-07-24 RYR1ZE BRU → DUB Jul 24, 18:40 UTCJul 24, 22:20 UTC3h 40m
2026-07-24 RYR98VN EDI → ALC Jul 24, 14:10 UTCJul 24, 17:25 UTC3h 15m
2026-07-24 RYR9JW LPL → ALC Jul 24, 10:25 UTCJul 24, 13:00 UTC2h 35m
2026-07-24 RYR4KR AGP → EIN Jul 24, 07:05 UTCJul 24, 09:25 UTC2h 20m
2026-07-23 RYR7MN - Jul 23, 17:50 UTCJul 23, 20:40 UTC2h 50m
2026-07-23 RYR85QL AGP → LBC Jul 23, 13:55 UTCJul 23, 17:00 UTC3h 5m
2026-07-23 RYR9JW LPL → ALC Jul 23, 10:10 UTCJul 23, 12:35 UTC2h 25m
2026-07-23 RYR4KR AGP → EIN Jul 23, 06:40 UTCJul 23, 09:10 UTC2h 30m
2026-07-22 RYR16AJ ALC → CPH Jul 22, 18:00 UTCJul 22, 20:20 UTC2h 20m
2026-07-22 RYR83CW - Jul 22, 15:05 UTCJul 22, 16:50 UTC1h 45m
2026-07-22 RYR5PE LPA → FCO Jul 22, 12:15 UTCJul 22, 13:50 UTC1h 35m
2026-07-21 RYR57AE BZG → BHX Jul 21, 20:05 UTCJul 21, 21:55 UTC1h 50m
2026-07-21 RYR87VA - Jul 21, 17:30 UTCJul 21, 19:20 UTC1h 50m
2026-07-21 RYR83CW - Jul 21, 14:40 UTCJul 21, 16:30 UTC1h 50m
2026-07-21 RYR5PE LPA → FCO Jul 21, 12:00 UTCJul 21, 13:40 UTC1h 40m
2026-07-21 RYR7TK GDN → BRS Jul 21, 08:30 UTCJul 21, 10:20 UTC1h 50m
2026-07-21 RYR17CG BHX → TSF Jul 21, 05:40 UTCJul 21, 07:25 UTC1h 45m
2026-07-20 RYR76EK RHO → BHX Jul 20, 19:45 UTCJul 20, 23:50 UTC4h 5m
2026-07-20 RYR88BE BHX → RHO Jul 20, 14:30 UTCJul 20, 18:15 UTC3h 45m
2026-07-20 RYR6QG - Jul 20, 10:30 UTCJul 20, 12:45 UTC2h 15m
2026-07-20 RYR94EL - Jul 20, 07:05 UTCJul 20, 09:20 UTC2h 15m
2026-07-19 RYR6ZM CGN → AGP Jul 19, 22:30 UTCJul 20, 00:40 UTC2h 10m
2026-07-19 RYR59BZ - Jul 19, 19:25 UTCJul 19, 21:35 UTC2h 10m
2026-07-19 RYR3258 SNN → BHX Jul 19, 17:25 UTCJul 19, 18:20 UTC55m
2026-07-19 RYR4DH - Jul 19, 15:40 UTCJul 19, 16:30 UTC50m
2026-07-19 RYR19EN - Jul 19, 12:50 UTCJul 19, 14:35 UTC1h 45m
2026-07-19 RYR27TT - Jul 19, 09:35 UTCJul 19, 11:10 UTC1h 35m
2026-07-19 RYR719 - Jul 19, 07:40 UTCJul 19, 08:25 UTC45m
2026-07-19 RYR537R BHX → BVA Jul 19, 06:00 UTCJul 19, 06:55 UTC55m
2026-07-18 RYR7TK - Jul 18, 18:25 UTCJul 18, 20:20 UTC1h 55m
2026-07-18 RYR17CG - Jul 18, 15:55 UTCJul 18, 17:35 UTC1h 40m
2026-07-18 RYR3FK NUE → BUD Jul 18, 10:25 UTCJul 18, 13:30 UTC3h 5m
2026-07-18 RYR3421 BHX → OTP Jul 18, 07:35 UTCJul 18, 09:30 UTC1h 55m
2026-07-18 RYR981Y - Jul 18, 04:55 UTCJul 18, 06:05 UTC1h 10m
2026-07-17 RYR6FJ - Jul 17, 17:20 UTCJul 17, 20:44 UTC3h 25m
2026-07-17 RYR4DG - Jul 17, 14:44 UTCJul 17, 16:00 UTC1h 15m
2026-07-17 RYR4DG - Jul 17, 12:04 UTCJul 17, 14:39 UTC2h 35m
2026-07-17 RYR9UR - Jul 17, 08:49 UTCJul 17, 10:44 UTC1h 55m
2026-07-17 RYR169Q BHX → MAD Jul 17, 05:04 UTCJul 17, 07:05 UTC2h 0m
2026-07-16 RYR85KR - Jul 16, 23:05 UTCJul 17, 01:20 UTC2h 15m

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 Jul 26, 20:40 UTC.
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 20 distinct callsigns, including RYR85ZR, RYR82, RYR22PF, RYR1JK, RYR9JW.