Apparatus

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sensors Mode-S transponder

4609DB

ICAO 24-bit transponder address · allocated to Finland

Currently assigned to OH-DTB · DIAMOND DA-40 Club Star

Hex
4609DB
Octal
21404733
Decimal
4,590,043
Country
FI
Tail
OH-DTB
Type
DA40
No current signal · last broadcast 8h ago
Flights observed
53
Distinct callsigns
2
Country
FI
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 4609DB.

Country allocation

The ICAO 24-bit address 4609DB falls within the block assigned to Finland (FI) by ICAO Annex 10, Volume III. Every aircraft registered in Finland 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 2 distinct

Callsign Airline Flights Last seen
OHDTB - 52 2026-06-18
OCO001 - 1 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-22 OCO001 - Jun 22, 15:35 UTCJun 22, 19:34 UTC4h 0m
2026-06-18 OHDTB - Jun 18, 14:05 UTCJun 18, 14:45 UTC40m
2026-06-16 OHDTB - Jun 16, 15:20 UTCJun 16, 16:35 UTC1h 15m
2026-06-16 OHDTB - Jun 16, 13:34 UTCJun 16, 13:40 UTC5m
2026-06-16 OHDTB - Jun 16, 13:00 UTCJun 16, 13:30 UTC30m
2026-06-16 OHDTB - Jun 16, 11:25 UTCJun 16, 11:45 UTC20m
2026-06-16 OHDTB - Jun 16, 10:40 UTCJun 16, 10:49 UTC10m
2026-06-16 OHDTB - Jun 16, 09:15 UTCJun 16, 09:50 UTC35m
2026-06-16 OHDTB - Jun 16, 08:10 UTCJun 16, 08:25 UTC15m
2026-06-16 OHDTB - Jun 16, 07:55 UTCJun 16, 08:05 UTC10m
2026-06-16 OHDTB - Jun 16, 07:09 UTCJun 16, 07:20 UTC10m
2026-06-15 OHDTB - Jun 15, 10:15 UTCJun 15, 12:05 UTC1h 50m
2026-06-15 OHDTB - Jun 15, 07:55 UTCJun 15, 08:49 UTC55m
2026-06-14 OHDTB - Jun 14, 14:00 UTCJun 14, 14:10 UTC10m
2026-06-14 OHDTB - Jun 14, 13:35 UTCJun 14, 13:45 UTC10m
2026-06-14 OHDTB - Jun 14, 10:25 UTCJun 14, 11:10 UTC45m
2026-06-14 OHDTB - Jun 14, 07:25 UTCJun 14, 08:55 UTC1h 30m
2026-06-13 OHDTB - Jun 13, 13:35 UTCJun 13, 15:05 UTC1h 30m
2026-06-13 OHDTB - Jun 13, 10:30 UTCJun 13, 12:05 UTC1h 35m
2026-06-12 OHDTB - Jun 12, 15:40 UTCJun 12, 17:10 UTC1h 30m
2026-06-12 OHDTB - Jun 12, 14:35 UTCJun 12, 15:05 UTC30m
2026-06-12 OHDTB - Jun 12, 13:40 UTCJun 12, 14:01 UTC20m
2026-06-11 OHDTB - Jun 11, 13:05 UTCJun 11, 13:45 UTC40m
2026-06-11 OHDTB - Jun 11, 11:00 UTCJun 11, 11:30 UTC30m
2026-06-11 OHDTB - Jun 11, 10:10 UTCJun 11, 10:20 UTC10m
2026-06-11 OHDTB - Jun 11, 08:00 UTCJun 11, 08:50 UTC50m
2026-06-10 OHDTB - Jun 10, 15:25 UTCJun 10, 16:20 UTC55m
2026-06-10 OHDTB - Jun 10, 13:20 UTCJun 10, 14:00 UTC40m
2026-06-10 OHDTB - Jun 10, 11:55 UTCJun 10, 12:25 UTC30m
2026-06-10 OHDTB - Jun 10, 11:00 UTCJun 10, 11:10 UTC10m
2026-06-10 OHDTB - Jun 10, 09:15 UTCJun 10, 10:10 UTC55m
2026-06-09 OHDTB - Jun 9, 13:40 UTCJun 9, 14:20 UTC40m
2026-06-09 OHDTB - Jun 9, 11:45 UTCJun 9, 12:25 UTC40m
2026-06-09 OHDTB - Jun 9, 09:05 UTCJun 9, 09:20 UTC15m
2026-06-09 OHDTB - Jun 9, 07:35 UTCJun 9, 08:10 UTC35m
2026-06-08 OHDTB - Jun 8, 12:00 UTCJun 8, 14:40 UTC2h 40m
2026-06-07 OHDTB - Jun 7, 11:00 UTCJun 7, 11:20 UTC20m
2026-06-07 OHDTB - Jun 7, 08:45 UTCJun 7, 09:25 UTC40m
2026-06-05 OHDTB - Jun 5, 10:25 UTCJun 5, 11:05 UTC40m
2026-06-05 OHDTB - Jun 5, 06:35 UTCJun 5, 07:10 UTC35m
2026-06-04 OHDTB - Jun 4, 14:55 UTCJun 4, 16:15 UTC1h 20m
2026-06-03 OHDTB - Jun 3, 09:30 UTCJun 3, 09:50 UTC20m
2026-06-03 OHDTB - Jun 3, 08:25 UTCJun 3, 08:30 UTC5m
2026-05-31 OHDTB - May 31, 10:00 UTCMay 31, 11:50 UTC1h 50m
2026-05-30 OHDTB - May 30, 09:05 UTCMay 30, 11:10 UTC2h 5m
2026-05-30 OHDTB - May 30, 07:00 UTCMay 30, 08:10 UTC1h 10m
2026-05-29 OHDTB - May 29, 12:20 UTCMay 29, 14:15 UTC1h 55m
2026-05-08 OHDTB - May 8, 07:59 UTCMay 8, 08:49 UTC50m
2026-05-08 OHDTB - May 8, 06:09 UTCMay 8, 06:54 UTC45m
2026-05-06 OHDTB - May 6, 10:10 UTCMay 6, 11:10 UTC1h 0m

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 OH-DTB page for operator, model, and routing details .

Mode-S 4609DB frequently asked

What is Mode-S code 4609DB?
4609DB is an ICAO 24-bit transponder address. Allocated to Finland. Assigned to OH-DTB.
Where is Mode-S 4609DB registered?
Mode-S code 4609DB is allocated to Finland (FI). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4609DB broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4609DB, octal 21404733, decimal 4,590,043.
What flights does 4609DB operate?
Mode-S 4609DB has broadcast 2 distinct callsigns, including OHDTB, OCO001.