Apparatus

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sensors Mode-S transponder

459A67

ICAO 24-bit transponder address · allocated to Denmark

Hex
459A67
Octal
21315147
Decimal
4,561,511
Country
DK
Transponder active on ground
Flights observed
84
Distinct callsigns
9
Country
DK
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 459A67.

Country allocation

The ICAO 24-bit address 459A67 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 9 distinct

Callsign Airline Flights Last seen
FRO679 - 12 2026-06-09
FRO678 - 12 2026-06-09
FRO685 - 11 2026-06-09
FRO684 - 11 2026-06-09
FRO671 - 10 2026-06-10
FRO670 - 10 2026-06-10
FRO674 - 9 2026-06-09
FRO675 - 8 2026-06-09
FRO990 - 1 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-10 FRO671 - Jun 10, 06:10 UTCJun 10, 07:10 UTC1h 0m
2026-06-10 FRO670 - Jun 10, 04:45 UTCJun 10, 05:35 UTC50m
2026-06-09 FRO685 - Jun 9, 17:25 UTCJun 9, 18:20 UTC55m
2026-06-09 FRO684 - Jun 9, 16:45 UTCJun 9, 17:10 UTC25m
2026-06-09 FRO679 - Jun 9, 14:10 UTCJun 9, 15:10 UTC1h 0m
2026-06-09 FRO678 - Jun 9, 12:35 UTCJun 9, 13:30 UTC55m
2026-06-09 FRO675 - Jun 9, 09:35 UTCJun 9, 10:35 UTC1h 0m
2026-06-09 FRO674 - Jun 9, 08:10 UTCJun 9, 09:05 UTC55m
2026-06-09 FRO671 - Jun 9, 06:25 UTCJun 9, 07:25 UTC1h 0m
2026-06-09 FRO670 - Jun 9, 05:00 UTCJun 9, 05:55 UTC55m
2026-06-08 FRO685 - Jun 8, 17:25 UTCJun 8, 18:20 UTC55m
2026-06-08 FRO684 - Jun 8, 15:50 UTCJun 8, 16:45 UTC55m
2026-06-08 FRO679 - Jun 8, 14:05 UTCJun 8, 15:00 UTC55m
2026-06-08 FRO678 - Jun 8, 12:40 UTCJun 8, 13:35 UTC55m
2026-06-08 FRO675 - Jun 8, 09:25 UTCJun 8, 10:25 UTC1h 0m
2026-06-08 FRO674 - Jun 8, 07:50 UTCJun 8, 08:50 UTC1h 0m
2026-06-08 FRO671 - Jun 8, 06:15 UTCJun 8, 07:10 UTC55m
2026-06-08 FRO670 - Jun 8, 04:50 UTCJun 8, 05:45 UTC55m
2026-06-07 FRO685 - Jun 7, 16:55 UTCJun 7, 17:50 UTC55m
2026-06-07 FRO684 - Jun 7, 15:25 UTCJun 7, 16:15 UTC50m
2026-06-07 FRO679 - Jun 7, 13:35 UTCJun 7, 14:35 UTC1h 0m
2026-06-07 FRO678 - Jun 7, 11:50 UTCJun 7, 12:45 UTC55m
2026-06-05 FRO685 - Jun 5, 17:20 UTCJun 5, 18:15 UTC55m
2026-06-05 FRO684 - Jun 5, 15:50 UTCJun 5, 16:40 UTC50m
2026-06-05 FRO679 - Jun 5, 14:10 UTCJun 5, 15:10 UTC1h 0m
2026-06-05 FRO678 - Jun 5, 12:40 UTCJun 5, 13:30 UTC50m
2026-06-05 FRO675 - Jun 5, 09:20 UTCJun 5, 10:20 UTC1h 0m
2026-06-05 FRO674 - Jun 5, 07:55 UTCJun 5, 08:45 UTC50m
2026-06-05 FRO671 - Jun 5, 06:10 UTCJun 5, 07:10 UTC1h 0m
2026-06-05 FRO670 - Jun 5, 04:45 UTCJun 5, 05:35 UTC50m
2026-06-04 FRO685 - Jun 4, 17:00 UTCJun 4, 18:00 UTC1h 0m
2026-06-04 FRO684 - Jun 4, 15:40 UTCJun 4, 16:30 UTC50m
2026-06-04 FRO679 - Jun 4, 14:00 UTCJun 4, 15:00 UTC1h 0m
2026-06-04 FRO678 - Jun 4, 12:35 UTCJun 4, 13:25 UTC50m
2026-06-04 FRO675 - Jun 4, 09:20 UTCJun 4, 10:20 UTC1h 0m
2026-06-04 FRO674 - Jun 4, 07:50 UTCJun 4, 08:45 UTC55m
2026-06-04 FRO671 - Jun 4, 06:10 UTCJun 4, 07:10 UTC1h 0m
2026-06-04 FRO670 - Jun 4, 04:40 UTCJun 4, 05:35 UTC55m
2026-06-03 FRO685 - Jun 3, 17:05 UTCJun 3, 18:00 UTC55m
2026-06-03 FRO684 - Jun 3, 15:40 UTCJun 3, 16:35 UTC55m
2026-06-03 FRO679 - Jun 3, 14:00 UTCJun 3, 14:55 UTC55m
2026-06-03 FRO678 - Jun 3, 12:35 UTCJun 3, 13:30 UTC55m
2026-06-03 FRO675 - Jun 3, 09:30 UTCJun 3, 10:30 UTC1h 0m
2026-06-03 FRO674 - Jun 3, 07:50 UTCJun 3, 08:45 UTC55m
2026-06-03 FRO671 - Jun 3, 06:10 UTCJun 3, 07:05 UTC55m
2026-06-03 FRO670 - Jun 3, 04:45 UTCJun 3, 05:40 UTC55m
2026-06-02 FRO685 - Jun 2, 17:05 UTCJun 2, 18:00 UTC55m
2026-06-02 FRO684 - Jun 2, 15:35 UTCJun 2, 16:30 UTC55m
2026-06-02 FRO679 - Jun 2, 14:05 UTCJun 2, 15:00 UTC55m
2026-06-02 FRO678 - Jun 2, 12:35 UTCJun 2, 13:30 UTC55m

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.

Mode-S 459A67 frequently asked

What is Mode-S code 459A67?
459A67 is an ICAO 24-bit transponder address. Allocated to Denmark.
Where is Mode-S 459A67 registered?
Mode-S code 459A67 is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 459A67 broadcasting right now?
Mode-S 459A67 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 459A67, octal 21315147, decimal 4,561,511.
What flights does 459A67 operate?
Mode-S 459A67 has broadcast 9 distinct callsigns, including FRO679, FRO678, FRO685, FRO684, FRO671.