Apparatus

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sensors Mode-S transponder

4D2103

ICAO 24-bit transponder address · allocated to Malta

Currently assigned to 9H-JOY · BOMBARDIER Regional Jet CRJ-200

Hex
4D2103
Octal
23220403
Decimal
5,054,723
Country
MT
Tail
9H-JOY
Type
CRJ2
Broadcasting now · callsign AXY167V · 20,400 ft
Flights observed
170
Distinct callsigns
20
Country
MT
Last broadcast
17h ago

Current position

4D2103 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4D2103 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
AXY99BT - 4 2026-06-11
AXY293P - 3 2026-04-13
AXY801Y - 2 2026-04-13
AXY667P - 2 2026-04-17
AXY618Y - 2 2026-04-16
AXY618K - 2 2026-04-15
AXY589F - 2 2026-04-17
AXY222G - 2 2026-04-16
AXY99NR - 1 2026-04-25
AXY993C - 1 2026-04-12
AXY985N - 1 2026-04-20
AXY982S - 1 2026-07-12
AXY977M - 1 2026-06-15
AXY967E - 1 2026-05-08
AXY966K - 1 2026-06-05
AXY950Y - 1 2026-05-04
AXY948R - 1 2026-06-12
AXY936R - 1 2026-05-30
AXY931T - 1 2026-04-18
AXY927K - 1 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 AXY351H - Jul 13, 16:10 UTCJul 13, 18:30 UTC2h 20m
2026-07-13 AXY715X - Jul 13, 13:15 UTCJul 13, 15:10 UTC1h 55m
2026-07-13 AXY664K ORK → BQH Jul 13, 10:20 UTCJul 13, 11:35 UTC1h 15m
2026-07-13 AXY611E - Jul 13, 06:50 UTCJul 13, 09:00 UTC2h 10m
2026-07-12 AXY982S - Jul 12, 15:45 UTCJul 12, 18:10 UTC2h 25m
2026-07-12 AXY859K - Jul 12, 13:50 UTCJul 12, 14:55 UTC1h 5m
2026-07-11 AXY148Q - Jul 11, 20:25 UTCJul 11, 21:15 UTC50m
2026-07-11 AXY147Q - Jul 11, 16:10 UTCJul 11, 19:30 UTC3h 20m
2026-07-11 AXY0711 - Jul 11, 13:15 UTCJul 11, 15:15 UTC2h 0m
2026-07-10 AXY816C - Jul 10, 18:15 UTCJul 10, 19:25 UTC1h 10m
2026-07-10 AXY285Y - Jul 10, 14:55 UTCJul 10, 16:10 UTC1h 15m
2026-07-10 AXY774S - Jul 10, 11:15 UTCJul 10, 13:05 UTC1h 50m
2026-07-09 AXY536K - Jul 9, 16:55 UTCJul 9, 19:30 UTC2h 35m
2026-07-09 AXY543C - Jul 9, 09:25 UTCJul 9, 11:45 UTC2h 20m
2026-07-08 AXY845F BQH → FAB Jul 8, 16:05 UTCJul 8, 16:45 UTC40m
2026-07-08 AXY226H - Jul 8, 11:10 UTCJul 8, 15:05 UTC3h 55m
2026-07-07 AXY7786 ATH → ISL Jul 7, 04:05 UTCJul 7, 05:10 UTC1h 5m
2026-07-06 AXY777N - Jul 6, 09:45 UTCJul 6, 11:20 UTC1h 35m
2026-07-05 AXY146A - Jul 5, 18:50 UTCJul 5, 20:05 UTC1h 15m
2026-07-05 AXY314E - Jul 5, 17:00 UTCJul 5, 17:40 UTC40m
2026-07-05 AXY563F - Jul 5, 14:45 UTCJul 5, 15:05 UTC20m
2026-07-05 AXY579U - Jul 5, 11:20 UTCJul 5, 12:45 UTC1h 25m
2026-07-02 AXY789A NCE → NCE Jul 2, 17:45 UTCJul 2, 18:25 UTC40m
2026-07-02 AXY299X - Jul 2, 15:05 UTCJul 2, 16:20 UTC1h 15m
2026-07-01 AXY165A - Jul 1, 18:40 UTCJul 1, 19:25 UTC45m
2026-06-16 AXY338W FAB → STN Jun 16, 13:15 UTCJun 16, 14:20 UTC1h 5m
2026-06-16 AXY907K - Jun 16, 09:45 UTCJun 16, 12:10 UTC2h 25m
2026-06-15 AXY977M - Jun 15, 14:10 UTCJun 15, 16:55 UTC2h 45m
2026-06-15 AXY683U - Jun 15, 10:45 UTCJun 15, 11:15 UTC30m
2026-06-14 AXY620R - Jun 14, 15:40 UTCJun 14, 16:50 UTC1h 10m
2026-06-14 AXY310J - Jun 14, 12:55 UTCJun 14, 13:40 UTC45m
2026-06-14 AXY589S - Jun 14, 11:10 UTCJun 14, 11:35 UTC25m
2026-06-13 AXY730H - Jun 13, 14:00 UTCJun 13, 15:00 UTC1h 0m
2026-06-13 AXY687H - Jun 13, 10:00 UTCJun 13, 12:45 UTC2h 45m
2026-06-12 AXY927K - Jun 12, 12:00 UTCJun 12, 12:15 UTC15m
2026-06-12 AXY948R - Jun 12, 08:10 UTCJun 12, 10:10 UTC2h 0m
2026-06-11 AXY639G GRZ → VIE Jun 11, 15:40 UTCJun 11, 16:05 UTC25m
2026-06-11 AXY99BT - Jun 11, 14:40 UTCJun 11, 15:10 UTC30m
2026-06-11 AXY99BT GRZ → GRZ Jun 11, 13:45 UTCJun 11, 14:20 UTC35m
2026-06-11 AXY99BT - Jun 11, 11:00 UTCJun 11, 12:05 UTC1h 5m
2026-06-11 AXY486F - Jun 11, 09:10 UTCJun 11, 09:35 UTC25m
2026-06-10 AXY390S MAN → CIA Jun 10, 14:15 UTCJun 10, 16:20 UTC2h 5m
2026-06-10 AXY555R FAO → MAN Jun 10, 10:15 UTCJun 10, 13:15 UTC3h 0m
2026-06-09 AXY99BT LIS → FAO Jun 9, 15:00 UTCJun 9, 18:10 UTC3h 10m
2026-06-09 AXY729X NCE → LIS Jun 9, 10:25 UTCJun 9, 12:50 UTC2h 25m
2026-06-09 AXY429H IBZ → NCE Jun 9, 07:20 UTCJun 9, 08:30 UTC1h 10m
2026-06-08 AXY544W - Jun 8, 17:05 UTCJun 8, 18:20 UTC1h 15m
2026-06-08 AXY703E - Jun 8, 14:45 UTCJun 8, 15:40 UTC55m
2026-06-08 AXY777S - Jun 8, 11:00 UTCJun 8, 12:05 UTC1h 5m
2026-06-08 AXY816V - Jun 8, 07:20 UTCJun 8, 09:15 UTC1h 55m

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

Mode-S 4D2103 frequently asked

What is Mode-S code 4D2103?
4D2103 is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-JOY.
Where is Mode-S 4D2103 registered?
Mode-S code 4D2103 is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D2103 broadcasting right now?
Yes. Mode-S 4D2103 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D2103, octal 23220403, decimal 5,054,723.
What flights does 4D2103 operate?
Mode-S 4D2103 has broadcast 20 distinct callsigns, including AXY99BT, AXY293P, AXY801Y, AXY667P, AXY618Y.