Apparatus

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sensors Mode-S transponder

4D2259

ICAO 24-bit transponder address · allocated to Malta

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

Hex
4D2259
Octal
23221131
Decimal
5,055,065
Country
MT
Tail
9H-QBB
Type
B738
Broadcasting now · callsign RYR82SQ · 11,550 ft
Flights observed
663
Distinct callsigns
20
Country
MT
Last broadcast
Jul 26, 22:15 UTC

Current position

4D2259 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4D2259 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
RYR4BN - 5 2026-04-16
RYR720F Ryanair 4 2026-05-17
RYR59RR - 4 2026-07-10
RYR40SX - 4 2026-07-11
RYR3029 - 4 2026-07-11
RYR3028 - 4 2026-07-11
RYR2SM Ryanair 4 2026-05-17
RYR1715 - 4 2026-04-20
RYR9PX Ryanair 3 2026-05-02
RYR93HA - 3 2026-07-10
RYR8HX Ryanair 3 2026-06-13
RYR822J Ryanair 3 2026-07-25
RYR79JM - 3 2026-07-11
RYR6EW - 3 2026-07-25
RYR69BQ Ryanair 3 2026-06-12
RYR65QZ Ryanair 3 2026-04-16
RYR611A Ryanair 3 2026-06-13
RYR5ZX Ryanair 3 2026-07-25
RYR5HE Ryanair 3 2026-05-01
RYR4KA - 3 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR49KC BLQ → LPA Jul 26, 14:05 UTCJul 26, 22:15 UTC8h 10m
2026-07-26 RYR633K CTA → BGY Jul 26, 11:10 UTCJul 26, 12:00 UTC50m
2026-07-26 RYR99NC BLQ → AHO Jul 26, 09:20 UTCJul 26, 10:10 UTC50m
2026-07-26 RYR78LL VLC → BLQ Jul 26, 06:45 UTCJul 26, 08:15 UTC1h 30m
2026-07-26 RYR91KF BLQ → VLC Jul 26, 04:05 UTCJul 26, 05:45 UTC1h 40m
2026-07-25 RYR2EH BRI → BLQ Jul 25, 19:40 UTCJul 25, 20:40 UTC1h 0m
2026-07-25 RYR18MQ - Jul 25, 17:50 UTCJul 25, 18:45 UTC55m
2026-07-25 RYR6EW MLA → BLQ Jul 25, 15:30 UTCJul 25, 17:05 UTC1h 35m
2026-07-25 RYR822J BLQ → MLA Jul 25, 13:30 UTCJul 25, 14:45 UTC1h 15m
2026-07-25 RYR1HH BTS → MLA Jul 25, 10:50 UTCJul 25, 12:15 UTC1h 25m
2026-07-25 RYR5ZX CAG → DUB Jul 25, 08:30 UTCJul 25, 09:55 UTC1h 25m
2026-07-25 RYR81BC BCN → BHX Jul 25, 06:10 UTCJul 25, 07:30 UTC1h 20m
2026-07-25 RYR8BF TPS → BLQ Jul 25, 04:05 UTCJul 25, 05:10 UTC1h 5m
2026-07-24 RYR25FL DUB → BLQ Jul 24, 18:55 UTCJul 24, 21:05 UTC2h 10m
2026-07-24 RYR33ZB SUF → TRS Jul 24, 16:40 UTCJul 24, 17:55 UTC1h 15m
2026-07-24 RYR20AU DUB → AMS Jul 24, 14:10 UTCJul 24, 15:15 UTC1h 5m
2026-07-24 RYR12KH AGP → DUB Jul 24, 10:30 UTCJul 24, 12:50 UTC2h 20m
2026-07-24 RYR3FF DUB → AGP Jul 24, 05:30 UTCJul 24, 08:15 UTC2h 45m
2026-07-23 RYR83CH LCJ → DUB Jul 23, 21:25 UTCJul 23, 23:50 UTC2h 25m
2026-07-23 RYR19ZZ - Jul 23, 18:10 UTCJul 23, 20:25 UTC2h 15m
2026-07-23 RYR2AJ MAN → DUB Jul 23, 16:40 UTCJul 23, 17:15 UTC35m
2026-07-23 RYR554 DUB → MAN Jul 23, 15:15 UTCJul 23, 15:50 UTC35m
2026-07-23 RYR12MM LGW → DUB Jul 23, 12:25 UTCJul 23, 13:15 UTC50m
2026-07-23 RYR28JB DUB → LGW Jul 23, 10:15 UTCJul 23, 11:15 UTC1h 0m
2026-07-23 RYR83UV - Jul 23, 07:35 UTCJul 23, 09:05 UTC1h 30m
2026-07-23 RYR7VE DUB → BIQ Jul 23, 05:00 UTCJul 23, 06:35 UTC1h 35m
2026-07-22 RYR017 NCL → DUB Jul 22, 19:55 UTCJul 22, 20:40 UTC45m
2026-07-22 RYR9BL DUB → NCL Jul 22, 18:30 UTCJul 22, 19:10 UTC40m
2026-07-22 RYR3QK - Jul 22, 16:15 UTCJul 22, 17:35 UTC1h 20m
2026-07-22 RYR83SZ DUB → BRU Jul 22, 14:05 UTCJul 22, 15:15 UTC1h 10m
2026-07-22 RYR954Y DUB → DUB Jul 22, 04:55 UTCJul 22, 12:10 UTC7h 15m
2026-07-21 RYR8911 ZAG → DUB Jul 21, 20:45 UTCJul 21, 23:15 UTC2h 30m
2026-07-21 RYR8912 DUB → ZAG Jul 21, 17:25 UTCJul 21, 19:35 UTC2h 10m
2026-07-21 RYR90GK POZ → DUB Jul 21, 14:10 UTCJul 21, 16:15 UTC2h 5m
2026-07-21 RYR65YP DUB → POZ Jul 21, 11:20 UTCJul 21, 13:25 UTC2h 5m
2026-07-20 RYR86GY - Jul 20, 21:05 UTCJul 20, 21:40 UTC35m
2026-07-20 RYR8UL DUB → EDI Jul 20, 19:35 UTCJul 20, 20:15 UTC40m
2026-07-20 RYR95MP BER → DUB Jul 20, 16:45 UTCJul 20, 18:40 UTC1h 55m
2026-07-20 RYR8RZ CTA → STN Jul 20, 13:45 UTCJul 20, 15:35 UTC1h 50m
2026-07-20 RYR628R RMU → DUB Jul 20, 09:30 UTCJul 20, 12:05 UTC2h 35m
2026-07-20 RYR76RK - Jul 20, 06:10 UTCJul 20, 08:35 UTC2h 25m
2026-07-19 RYR6WG DUB → DUB Jul 19, 16:40 UTCJul 20, 00:10 UTC7h 30m
2026-07-19 RYR3QZ DUB → ACE Jul 19, 13:00 UTCJul 19, 15:25 UTC2h 25m
2026-07-19 RYR40TF DUB → PMI Jul 19, 06:30 UTCJul 19, 08:45 UTC2h 15m
2026-07-18 RYR6CN - Jul 18, 18:40 UTCJul 18, 22:15 UTC3h 35m
2026-07-18 RYR74WC - Jul 18, 13:40 UTCJul 18, 17:20 UTC3h 40m
2026-07-18 RYR42BT - Jul 18, 11:50 UTCJul 18, 12:20 UTC30m
2026-07-18 RYR4KA DUB → LPL Jul 18, 10:35 UTCJul 18, 11:00 UTC25m
2026-07-18 RYR2AF - Jul 18, 07:55 UTCJul 18, 09:40 UTC1h 45m
2026-07-18 RYR31UZ DUB → SCQ Jul 18, 04:55 UTCJul 18, 06:35 UTC1h 40m

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

Mode-S 4D2259 frequently asked

What is Mode-S code 4D2259?
4D2259 is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-QBB.
Where is Mode-S 4D2259 registered?
Mode-S code 4D2259 is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D2259 broadcasting right now?
Yes. Mode-S 4D2259 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D2259, octal 23221131, decimal 5,055,065.
What flights does 4D2259 operate?
Mode-S 4D2259 has broadcast 20 distinct callsigns, including RYR4BN, RYR720F, RYR59RR, RYR40SX, RYR3029.