Apparatus

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sensors Mode-S transponder

4598CB

ICAO 24-bit transponder address · allocated to Denmark

Currently assigned to OY-FFK · TECNAM P-2002 Sierra

Hex
4598CB
Octal
21314313
Decimal
4,561,099
Country
DK
Tail
OY-FFK
Type
SIRA
No current signal · last broadcast 2d ago
Flights observed
171
Distinct callsigns
1
Country
DK
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 4598CB.

Country allocation

The ICAO 24-bit address 4598CB 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 1 distinct

Callsign Airline Flights Last seen
OYFFK - 171 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 OYFFK RKE → RKE Jul 15, 12:10 UTCJul 15, 12:55 UTC45m
2026-07-15 OYFFK RKE → RKE Jul 15, 08:15 UTCJul 15, 09:50 UTC1h 35m
2026-07-14 OYFFK - Jul 14, 11:40 UTCJul 14, 13:05 UTC1h 25m
2026-07-14 OYFFK - Jul 14, 08:25 UTCJul 14, 09:45 UTC1h 20m
2026-07-02 OYFFK - Jul 2, 07:15 UTCJul 2, 08:40 UTC1h 25m
2026-07-01 OYFFK - Jul 1, 17:40 UTCJul 1, 18:35 UTC55m
2026-07-01 OYFFK - Jul 1, 13:55 UTCJul 1, 14:50 UTC55m
2026-07-01 OYFFK RKE → RKE Jul 1, 08:35 UTCJul 1, 09:45 UTC1h 10m
2026-07-01 OYFFK - Jul 1, 06:10 UTCJul 1, 07:20 UTC1h 10m
2026-06-30 OYFFK - Jun 30, 08:25 UTCJun 30, 09:55 UTC1h 30m
2026-06-30 OYFFK RKE → RKE Jun 30, 06:05 UTCJun 30, 07:40 UTC1h 35m
2026-06-29 OYFFK RKE → RKE Jun 29, 15:30 UTCJun 29, 16:00 UTC30m
2026-06-29 OYFFK - Jun 29, 11:39 UTCJun 29, 12:29 UTC50m
2026-06-29 OYFFK RKE → RKE Jun 29, 07:15 UTCJun 29, 07:59 UTC45m
2026-06-28 OYFFK - Jun 28, 16:00 UTCJun 28, 16:49 UTC50m
2026-06-27 OYFFK RKE → RKE Jun 27, 10:14 UTCJun 27, 10:50 UTC35m
2026-06-27 OYFFK - Jun 27, 07:04 UTCJun 27, 08:39 UTC1h 35m
2026-06-26 OYFFK - Jun 26, 13:49 UTCJun 26, 14:29 UTC40m
2026-06-26 OYFFK - Jun 26, 11:34 UTCJun 26, 12:55 UTC1h 20m
2026-06-25 OYFFK - Jun 25, 15:59 UTCJun 25, 17:05 UTC1h 5m
2026-06-25 OYFFK RKE → RKE Jun 25, 12:19 UTCJun 25, 13:40 UTC1h 20m
2026-06-25 OYFFK - Jun 25, 09:34 UTCJun 25, 11:15 UTC1h 40m
2026-06-25 OYFFK - Jun 25, 07:09 UTCJun 25, 07:49 UTC40m
2026-06-24 OYFFK RKE → RKE Jun 24, 17:50 UTCJun 24, 19:39 UTC1h 50m
2026-06-24 OYFFK RKE → RKE Jun 24, 15:09 UTCJun 24, 16:40 UTC1h 30m
2026-06-24 OYFFK RKE → RKE Jun 24, 12:50 UTCJun 24, 14:09 UTC1h 20m
2026-06-24 OYFFK - Jun 24, 09:55 UTCJun 24, 11:45 UTC1h 50m
2026-06-24 OYFFK RKE → RKE Jun 24, 06:59 UTCJun 24, 09:00 UTC2h 0m
2026-06-23 OYFFK - Jun 23, 15:50 UTCJun 23, 16:39 UTC50m
2026-06-23 OYFFK RKE → RKE Jun 23, 12:15 UTCJun 23, 13:39 UTC1h 25m
2026-06-23 OYFFK RKE → RKE Jun 23, 08:39 UTCJun 23, 09:59 UTC1h 20m
2026-06-23 OYFFK RKE → RKE Jun 23, 06:39 UTCJun 23, 07:29 UTC50m
2026-06-22 OYFFK RKE → RKE Jun 22, 14:24 UTCJun 22, 15:54 UTC1h 30m
2026-06-22 OYFFK - Jun 22, 12:30 UTCJun 22, 13:19 UTC50m
2026-06-22 OYFFK RKE → RKE Jun 22, 09:54 UTCJun 22, 10:30 UTC35m
2026-06-22 OYFFK RKE → RKE Jun 22, 06:00 UTCJun 22, 06:54 UTC55m
2026-06-20 OYFFK - Jun 20, 10:20 UTCJun 20, 11:05 UTC45m
2026-06-20 OYFFK RKE → RKE Jun 20, 08:29 UTCJun 20, 09:14 UTC45m
2026-06-19 OYFFK RKE → RKE Jun 19, 16:44 UTCJun 19, 18:05 UTC1h 20m
2026-06-19 OYFFK - Jun 19, 14:15 UTCJun 19, 15:34 UTC1h 20m
2026-06-19 OYFFK RKE → RKE Jun 19, 11:45 UTCJun 19, 12:29 UTC45m
2026-06-19 OYFFK - Jun 19, 09:09 UTCJun 19, 10:19 UTC1h 10m
2026-06-17 OYFFK RKE → RKE Jun 17, 10:55 UTCJun 17, 12:00 UTC1h 5m
2026-06-17 OYFFK - Jun 17, 09:15 UTCJun 17, 10:00 UTC45m
2026-06-16 OYFFK - Jun 16, 16:35 UTCJun 16, 18:15 UTC1h 40m
2026-06-16 OYFFK RKE → RKE Jun 16, 13:00 UTCJun 16, 13:44 UTC45m
2026-06-16 OYFFK - Jun 16, 10:40 UTCJun 16, 11:05 UTC25m
2026-06-16 OYFFK RKE → RKE Jun 16, 09:45 UTCJun 16, 10:00 UTC15m
2026-06-15 OYFFK RKE → RKE Jun 15, 09:25 UTCJun 15, 10:35 UTC1h 10m
2026-06-15 OYFFK RKE → RKE Jun 15, 06:49 UTCJun 15, 08:15 UTC1h 25m

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

Mode-S 4598CB frequently asked

What is Mode-S code 4598CB?
4598CB is an ICAO 24-bit transponder address. Allocated to Denmark. Assigned to OY-FFK.
Where is Mode-S 4598CB registered?
Mode-S code 4598CB is allocated to Denmark (DK). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4598CB broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4598CB, octal 21314313, decimal 4,561,099.
What flights does 4598CB operate?
Mode-S 4598CB has broadcast 1 distinct callsign, including OYFFK.