Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

459CD3

ICAO 24-bit transponder address · allocated to Denmark

Currently assigned to OY-GFS · DASSAULT Falcon 2000

Hex
459CD3
Octal
21316323
Decimal
4,562,131
Country
DK
Tail
OY-GFS
Type
F2TH
No current signal · last broadcast 19h ago
Flights observed
137
Distinct callsigns
20
Country
DK
Last broadcast
19h ago

Last known position

Most recent position reported by Mode-S 459CD3.

Country allocation

The ICAO 24-bit address 459CD3 falls within the block assigned to Denmark (DK) by ICAO Annex 10, Volume III. Every aircraft registered in Denmark 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
MMD4323 - 5 2026-06-11
MMD6872 Air Alsie 4 2026-05-23
MMD6869 Air Alsie 4 2026-06-07
MMD6847 Air Alsie 4 2026-05-17
MMD6845 Air Alsie 4 2026-05-11
MMD6844 - 4 2026-06-01
MMD6827 Air Alsie 4 2026-05-01
MMD6776 Air Alsie 4 2026-04-22
MMD6739 Air Alsie 4 2026-04-17
MMD6104 - 4 2026-07-09
MMD6047 - 4 2026-06-20
MMD4373 Air Alsie 4 2026-04-28
MMD4322 - 4 2026-05-08
MMD6884 Air Alsie 3 2026-06-07
MMD6877 - 3 2026-07-04
MMD6859 - 3 2026-05-27
MMD6831 Air Alsie 3 2026-05-03
MMD6814 Air Alsie 3 2026-04-29
MMD6118 - 3 2026-07-15
MMD6096 - 3 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 MMD6128 FSC → CIA Jul 17, 07:00 UTCJul 17, 07:30 UTC30m
2026-07-17 MMD6128 FSC → CIA Jul 17, 05:20 UTCJul 17, 05:55 UTC35m
2026-07-15 MMD6120 - Jul 15, 17:15 UTCJul 15, 17:50 UTC35m
2026-07-15 MMD6118 - Jul 15, 15:20 UTCJul 15, 16:30 UTC1h 10m
2026-07-15 MMD6118 - Jul 15, 09:35 UTCJul 15, 10:50 UTC1h 15m
2026-07-14 MMD6118 - Jul 14, 08:35 UTCJul 14, 09:20 UTC45m
2026-07-11 MMD6108 ZRH → OLB Jul 11, 13:05 UTCJul 11, 14:15 UTC1h 10m
2026-07-11 MMD6107 - Jul 11, 11:25 UTCJul 11, 12:15 UTC50m
2026-07-11 MMD6107 - Jul 11, 07:00 UTCJul 11, 08:10 UTC1h 10m
2026-07-10 MMD6106 - Jul 10, 16:50 UTCJul 10, 18:05 UTC1h 15m
2026-07-10 MMD6106 - Jul 10, 14:35 UTCJul 10, 15:45 UTC1h 10m
2026-07-10 MMD6105 - Jul 10, 08:40 UTCJul 10, 10:20 UTC1h 40m
2026-07-09 MMD6104 - Jul 9, 12:35 UTCJul 9, 14:20 UTC1h 45m
2026-07-09 MMD6104 - Jul 9, 10:45 UTCJul 9, 12:00 UTC1h 15m
2026-07-09 MMD6104 MST → DUB Jul 9, 05:40 UTCJul 9, 06:55 UTC1h 15m
2026-07-08 MMD6104 - Jul 8, 15:10 UTCJul 8, 16:00 UTC50m
2026-07-06 MMD4382 BUD → BLL Jul 6, 12:55 UTCJul 6, 14:40 UTC1h 45m
2026-07-04 MMD6877 - Jul 4, 13:10 UTCJul 4, 14:25 UTC1h 15m
2026-07-04 MMD6877 - Jul 4, 10:10 UTCJul 4, 12:05 UTC1h 55m
2026-07-04 MMD6877 - Jul 4, 08:30 UTCJul 4, 09:00 UTC30m
2026-07-02 MMD6096 IBZ → BLL Jul 2, 21:45 UTCJul 3, 00:25 UTC2h 40m
2026-07-02 MMD6096 - Jul 2, 17:15 UTCJul 2, 20:45 UTC3h 30m
2026-07-02 MMD6096 - Jul 2, 15:45 UTCJul 2, 16:40 UTC55m
2026-07-01 MMD6090 - Jul 1, 14:10 UTCJul 1, 15:40 UTC1h 30m
2026-07-01 MMD6090 - Jul 1, 09:50 UTCJul 1, 13:00 UTC3h 10m
2026-07-01 MMD6090 - Jul 1, 07:20 UTCJul 1, 08:45 UTC1h 25m
2026-06-30 MMD4350 - Jun 30, 15:05 UTCJun 30, 16:35 UTC1h 30m
2026-06-29 MMD4350 - Jun 29, 09:50 UTCJun 29, 11:29 UTC1h 40m
2026-06-26 MMD4407 - Jun 26, 07:55 UTCJun 26, 08:50 UTC55m
2026-06-26 MMD4407 - Jun 26, 06:00 UTCJun 26, 07:05 UTC1h 5m
2026-06-24 MMD4356 - Jun 24, 15:35 UTCJun 24, 17:10 UTC1h 35m
2026-06-24 MMD4356 - Jun 24, 13:00 UTCJun 24, 14:29 UTC1h 30m
2026-06-23 MMD4392 - Jun 23, 15:04 UTCJun 23, 15:59 UTC55m
2026-06-23 MMD4392 - Jun 23, 13:24 UTCJun 23, 14:19 UTC55m
2026-06-22 MMD4392 BRU → BLL Jun 22, 07:19 UTCJun 22, 08:19 UTC1h 0m
2026-06-20 MMD6047 - Jun 20, 14:05 UTCJun 20, 14:19 UTC15m
2026-06-20 MMD6047 VIE → ANR Jun 20, 11:49 UTCJun 20, 13:14 UTC1h 25m
2026-06-20 MMD6047 BRQ → VIE Jun 20, 08:59 UTCJun 20, 09:14 UTC15m
2026-06-20 MMD6047 RTM → BRQ Jun 20, 06:45 UTCJun 20, 08:05 UTC1h 20m
2026-06-19 MMD4391 - Jun 19, 13:14 UTCJun 19, 14:09 UTC55m
2026-06-18 MMD4391 RTM → BLL Jun 18, 07:15 UTCJun 18, 08:05 UTC50m
2026-06-17 MMD4387 BUD → RTM Jun 17, 17:10 UTCJun 17, 18:55 UTC1h 45m
2026-06-17 MMD4387 - Jun 17, 14:40 UTCJun 17, 16:10 UTC1h 30m
2026-06-15 MMD6001 - Jun 15, 12:45 UTCJun 15, 15:10 UTC2h 25m
2026-06-15 MMD6001 - Jun 15, 09:25 UTCJun 15, 12:10 UTC2h 45m
2026-06-15 MMD6001 - Jun 15, 07:10 UTCJun 15, 07:55 UTC45m
2026-06-12 MMD4324 BLL → FMO Jun 12, 18:40 UTCJun 12, 20:35 UTC1h 55m
2026-06-12 MMD4401 - Jun 12, 17:25 UTCJun 12, 18:05 UTC40m
2026-06-12 MMD4401 - Jun 12, 15:55 UTCJun 12, 16:25 UTC30m
2026-06-11 MMD4323 - Jun 11, 15:40 UTCJun 11, 16:20 UTC40m

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 OY-GFS page for operator, model, and routing details .

Mode-S 459CD3 frequently asked

What is Mode-S code 459CD3?
459CD3 is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-GFS.
Where is Mode-S 459CD3 registered?
Mode-S code 459CD3 is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 459CD3 broadcasting right now?
No active broadcast right now. Last signal was 19h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 459CD3, octal 21316323, decimal 4,562,131.
What flights does 459CD3 operate?
Mode-S 459CD3 has broadcast 20 distinct callsigns, including MMD4323, MMD6872, MMD6869, MMD6847, MMD6845.