Apparatus

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sensors Mode-S transponder

459D6E

ICAO 24-bit transponder address · allocated to Denmark

Currently assigned to OY-GKN · AIRBUS A-330-800

Hex
459D6E
Octal
21316556
Decimal
4,562,286
Country
DK
Tail
OY-GKN
Type
A338
No current signal · last broadcast 1h ago
Flights observed
88
Distinct callsigns
10
Country
DK
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 459D6E.

Country allocation

The ICAO 24-bit address 459D6E 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 10 distinct

Callsign Airline Flights Last seen
GRL781 - 31 2026-07-14
GRL779 - 22 2026-07-10
GRL780 - 13 2026-07-13
GRL782 - 10 2026-06-28
GRL1779 - 4 2026-07-08
GRL6802 Air Greenland 3 2026-05-20
GRL6801 - 2 2026-06-17
GRL4782 - 1 2026-06-21
GRL3779 Air Greenland 1 2026-04-19
GRL1783 Air Greenland 1 2026-04-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 GRL781 - Jul 14, 08:10 UTCJul 14, 11:10 UTC3h 0m
2026-07-13 GRL780 CPH → CPH Jul 13, 07:15 UTCJul 13, 18:15 UTC11h 0m
2026-07-12 GRL781 CPH → CPH Jul 12, 08:20 UTCJul 12, 19:05 UTC10h 45m
2026-07-11 GRL781 - Jul 11, 08:10 UTCJul 11, 19:25 UTC11h 15m
2026-07-10 GRL779 CPH → CPH Jul 10, 07:15 UTCJul 10, 18:00 UTC10h 45m
2026-07-09 GRL781 CPH → CPH Jul 9, 08:10 UTCJul 9, 19:15 UTC11h 5m
2026-07-08 GRL1779 CPH → CPH Jul 8, 07:30 UTCJul 8, 18:40 UTC11h 10m
2026-07-07 GRL781 - Jul 7, 08:25 UTCJul 7, 19:10 UTC10h 45m
2026-07-06 GRL779 - Jul 6, 07:40 UTCJul 6, 18:35 UTC10h 55m
2026-07-05 GRL781 - Jul 5, 08:10 UTCJul 5, 19:35 UTC11h 25m
2026-07-04 GRL1779 - Jul 4, 08:15 UTCJul 4, 19:15 UTC11h 0m
2026-07-03 GRL780 - Jul 3, 07:20 UTCJul 3, 18:35 UTC11h 15m
2026-07-02 GRL781 - Jul 2, 08:10 UTCJul 2, 19:05 UTC10h 55m
2026-07-01 GRL779 CPH → CPH Jul 1, 07:30 UTCJul 1, 18:15 UTC10h 45m
2026-06-30 GRL781 - Jun 30, 08:15 UTCJun 30, 19:15 UTC11h 0m
2026-06-29 GRL779 - Jun 29, 07:40 UTCJun 29, 18:14 UTC10h 35m
2026-06-28 GRL782 - Jun 28, 08:59 UTCJun 28, 19:40 UTC10h 40m
2026-06-27 GRL781 - Jun 27, 07:59 UTCJun 27, 19:15 UTC11h 15m
2026-06-26 GRL779 CPH → CPH Jun 26, 07:14 UTCJun 26, 18:15 UTC11h 0m
2026-06-25 GRL781 - Jun 25, 08:04 UTCJun 25, 19:09 UTC11h 5m
2026-06-24 GRL1779 - Jun 24, 08:24 UTCJun 24, 19:59 UTC11h 35m
2026-06-23 GRL781 CPH → CPH Jun 23, 08:09 UTCJun 23, 19:04 UTC10h 55m
2026-06-22 GRL780 - Jun 22, 07:14 UTCJun 22, 19:05 UTC11h 50m
2026-06-21 GRL4782 KEF → CPH Jun 21, 16:49 UTCJun 21, 19:20 UTC2h 30m
2026-06-21 GRL781 - Jun 21, 15:05 UTCJun 21, 15:30 UTC25m
2026-06-21 GRL781 - Jun 21, 08:10 UTCJun 21, 11:10 UTC3h 0m
2026-06-19 GRL779 - Jun 19, 07:25 UTCJun 19, 18:30 UTC11h 5m
2026-06-18 GRL781 - Jun 18, 08:10 UTCJun 18, 19:20 UTC11h 10m
2026-06-17 GRL6801 - Jun 17, 06:55 UTCJun 17, 18:10 UTC11h 15m
2026-06-16 GRL781 - Jun 16, 08:15 UTCJun 16, 19:05 UTC10h 50m
2026-06-15 GRL779 CPH → SFJ Jun 15, 07:20 UTCJun 15, 18:15 UTC10h 55m
2026-06-14 GRL1779 - Jun 14, 08:10 UTCJun 14, 19:20 UTC11h 10m
2026-06-12 GRL779 CPH → SFJ Jun 12, 07:10 UTCJun 12, 18:10 UTC11h 0m
2026-06-11 GRL781 CPH → SFJ Jun 11, 08:10 UTCJun 11, 19:15 UTC11h 5m
2026-06-09 GRL781 CPH → SFJ Jun 9, 08:15 UTCJun 9, 19:10 UTC10h 55m
2026-06-08 GRL780 SFJ → CPH Jun 8, 07:15 UTCJun 8, 18:25 UTC11h 10m
2026-06-05 GRL780 SFJ → CPH Jun 5, 07:20 UTCJun 5, 18:20 UTC11h 0m
2026-06-02 GRL782 SFJ → CPH Jun 2, 08:20 UTCJun 2, 19:05 UTC10h 45m
2026-06-01 GRL780 SFJ → CPH Jun 1, 07:15 UTCJun 1, 18:25 UTC11h 10m
2026-05-29 GRL780 SFJ → CPH May 29, 07:15 UTCMay 29, 18:35 UTC11h 20m
2026-05-28 GRL781 CPH → SFJ May 28, 08:20 UTCMay 28, 19:00 UTC10h 40m
2026-05-26 GRL781 CPH → SFJ May 26, 08:15 UTCMay 26, 18:55 UTC10h 40m
2026-05-25 GRL779 CPH → SFJ May 25, 07:15 UTCMay 25, 18:05 UTC10h 50m
2026-05-22 GRL779 CPH → SFJ May 22, 07:15 UTCMay 22, 18:10 UTC10h 55m
2026-05-21 GRL781 CPH → SFJ May 21, 08:10 UTCMay 21, 19:05 UTC10h 55m
2026-05-20 GRL6802 THU → CPH May 20, 07:05 UTCMay 20, 18:35 UTC11h 30m
2026-05-19 GRL782 SFJ → CPH May 19, 08:20 UTCMay 19, 19:10 UTC10h 50m
2026-05-18 GRL780 SFJ → CPH May 18, 07:10 UTCMay 18, 18:40 UTC11h 29m
2026-05-15 GRL780 SFJ → CPH May 15, 07:10 UTCMay 15, 18:10 UTC10h 59m
2026-05-14 GRL781 CPH → SFJ May 14, 08:05 UTCMay 14, 19:10 UTC11h 5m

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

Mode-S 459D6E frequently asked

What is Mode-S code 459D6E?
459D6E is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-GKN.
Where is Mode-S 459D6E registered?
Mode-S code 459D6E is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 459D6E broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 459D6E, octal 21316556, decimal 4,562,286.
What flights does 459D6E operate?
Mode-S 459D6E has broadcast 10 distinct callsigns, including GRL781, GRL779, GRL780, GRL782, GRL1779.