Apparatus

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sensors Mode-S transponder

4D2273

ICAO 24-bit transponder address · allocated to Malta

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

Hex
4D2273
Octal
23221163
Decimal
5,055,091
Country
MT
Tail
9H-QDQ
Type
B738
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
665
Distinct callsigns
20
Country
MT
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S 4D2273.

Country allocation

The ICAO 24-bit address 4D2273 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
RYR67HC Ryanair 8 2026-04-27
RYR11EX - 7 2026-06-21
RYR8PB Ryanair 6 2026-04-27
RYR80KA Ryanair 6 2026-04-30
RYR6405 Ryanair 6 2026-04-27
RYR4NU Ryanair 6 2026-04-29
RYR47QA Ryanair 6 2026-04-29
RYR2MW Ryanair 6 2026-04-29
RYR2BD - 6 2026-06-21
RYR19UC Ryanair 6 2026-04-29
RYR10UK Ryanair 6 2026-04-24
RYR88TZ Ryanair 5 2026-04-28
RYR7FT Ryanair 5 2026-06-20
RYR74RW Ryanair 5 2026-04-28
RYR30AP Ryanair 5 2026-04-26
RYR2XX Ryanair 5 2026-04-26
RYR2A Ryanair 5 2026-06-19
RYR1237 Ryanair 5 2026-06-19
RYR11LR Ryanair 5 2026-06-20
RYR9KB Ryanair 4 2026-04-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR21HR BUD → BCN Jul 26, 19:50 UTCJul 26, 22:00 UTC2h 10m
2026-07-26 RYR9FC EDI → SOF Jul 26, 16:30 UTCJul 26, 18:45 UTC2h 15m
2026-07-26 RYR94CD PRG → BCN Jul 26, 12:20 UTCJul 26, 14:10 UTC1h 50m
2026-07-26 RYR5BK TRN → OPO Jul 26, 09:35 UTCJul 26, 11:25 UTC1h 50m
2026-07-26 RYR2NW FEZ → CRL Jul 26, 07:05 UTCJul 26, 08:20 UTC1h 15m
2026-07-26 RYR57ZZ BCN → NDR Jul 26, 04:50 UTCJul 26, 06:05 UTC1h 15m
2026-07-25 RYR37KT DUB → BCN Jul 25, 23:25 UTCJul 26, 01:15 UTC1h 50m
2026-07-25 RYR17NT BCN → DUB Jul 25, 20:00 UTCJul 25, 22:15 UTC2h 15m
2026-07-25 RYR99TV IBZ → BCN Jul 25, 18:00 UTCJul 25, 18:30 UTC30m
2026-07-25 RYR1PK BCN → IBZ Jul 25, 16:15 UTCJul 25, 16:55 UTC40m
2026-07-25 RYR205A STR → HAM Jul 25, 12:00 UTCJul 25, 14:10 UTC2h 10m
2026-07-25 RYR11SZ BCN → VIE Jul 25, 06:40 UTCJul 25, 08:25 UTC1h 45m
2026-07-24 RYR46PL - Jul 24, 18:50 UTCJul 24, 20:45 UTC1h 55m
2026-07-24 RYR86NE BCN → STN Jul 24, 15:55 UTCJul 24, 17:40 UTC1h 45m
2026-07-24 RYR96RZ OPO → BCN Jul 24, 13:30 UTCJul 24, 14:45 UTC1h 15m
2026-07-24 RYR30UJ BCN → OPO Jul 24, 10:45 UTCJul 24, 12:20 UTC1h 35m
2026-07-24 RYR205A STR → HAM Jul 24, 07:00 UTCJul 24, 09:00 UTC2h 0m
2026-07-24 RYR11SZ BCN → VIE Jul 24, 04:15 UTCJul 24, 06:10 UTC1h 55m
2026-07-23 RYR66CW MAH → BCN Jul 23, 21:40 UTCJul 23, 22:15 UTC35m
2026-07-23 RYR7509 BCN → MAH Jul 23, 20:30 UTCJul 23, 20:55 UTC25m
2026-07-23 RYR89UQ - Jul 23, 17:25 UTCJul 23, 19:15 UTC1h 50m
2026-07-23 RYR1GE TSF → EIN Jul 23, 14:35 UTCJul 23, 16:10 UTC1h 35m
2026-07-23 RYR79HZ NCL → BCN Jul 23, 11:00 UTCJul 23, 13:05 UTC2h 5m
2026-07-23 RYR6811 BCN → NCL Jul 23, 07:55 UTCJul 23, 10:15 UTC2h 20m
2026-07-23 RYR3029 IBZ → BCN Jul 23, 06:00 UTCJul 23, 06:45 UTC45m
2026-07-23 RYR3028 BCN → IBZ Jul 23, 04:30 UTCJul 23, 05:05 UTC35m
2026-07-23 RYR7UH WMI → BRI Jul 23, 00:05 UTCJul 23, 01:35 UTC1h 30m
2026-07-22 RYR70ST BCN → PMO Jul 22, 21:45 UTCJul 22, 23:05 UTC1h 20m
2026-07-22 RYR2403 SVQ → BCN Jul 22, 19:20 UTCJul 22, 20:35 UTC1h 15m
2026-07-22 RYR3628 LIS → SVQ Jul 22, 16:45 UTCJul 22, 17:30 UTC45m
2026-07-22 RYR9PX SVQ → LIS Jul 22, 14:50 UTCJul 22, 15:35 UTC45m
2026-07-22 RYR7KG MAH → SVQ Jul 22, 12:25 UTCJul 22, 13:55 UTC1h 30m
2026-07-22 RYR9506 SVQ → MAH Jul 22, 11:20 UTCJul 22, 11:30 UTC10m
2026-07-22 RYR58KV - Jul 22, 04:45 UTCJul 22, 05:20 UTC35m
2026-07-21 RYR63AY - Jul 21, 21:30 UTCJul 21, 22:40 UTC1h 10m
2026-07-21 RYR2EV DUB → LPL Jul 21, 18:50 UTCJul 21, 20:05 UTC1h 15m
2026-07-21 RYR2XR - Jul 21, 14:50 UTCJul 21, 15:45 UTC55m
2026-07-21 RYR1XV - Jul 21, 12:15 UTCJul 21, 13:05 UTC50m
2026-07-21 RYR7401 VLC → MAH Jul 21, 10:25 UTCJul 21, 11:10 UTC45m
2026-07-21 RYR52SU - Jul 21, 07:15 UTCJul 21, 09:15 UTC2h 0m
2026-07-21 RYR65FR - Jul 21, 04:20 UTCJul 21, 05:55 UTC1h 35m
2026-07-20 RYR2BX JTR → MXP Jul 20, 22:45 UTCJul 20, 23:45 UTC1h 0m
2026-07-20 RYR20EE - Jul 20, 20:35 UTCJul 20, 21:55 UTC1h 20m
2026-07-20 RYR99UP ORK → VLC Jul 20, 16:55 UTCJul 20, 19:00 UTC2h 5m
2026-07-20 RYR29DU VLC → ORK Jul 20, 13:45 UTCJul 20, 15:55 UTC2h 10m
2026-07-20 RYR8HX - Jul 20, 10:35 UTCJul 20, 12:35 UTC2h 0m
2026-07-20 RYR611A - Jul 20, 07:30 UTCJul 20, 09:30 UTC2h 0m
2026-07-20 RYR1XV MAH → VLC Jul 20, 05:55 UTCJul 20, 06:40 UTC45m
2026-07-20 RYR7401 - Jul 20, 04:10 UTCJul 20, 05:00 UTC50m
2026-07-19 RYR6HR IBZ → VLC Jul 19, 22:25 UTCJul 19, 22:45 UTC20m

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

Mode-S 4D2273 frequently asked

What is Mode-S code 4D2273?
4D2273 is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-QDQ.
Where is Mode-S 4D2273 registered?
Mode-S code 4D2273 is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D2273 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D2273, octal 23221163, decimal 5,055,091.
What flights does 4D2273 operate?
Mode-S 4D2273 has broadcast 20 distinct callsigns, including RYR67HC, RYR11EX, RYR8PB, RYR80KA, RYR6405.