Apparatus

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sensors Mode-S transponder

4613D3

ICAO 24-bit transponder address · allocated to Finland

Currently assigned to OH-HNF · AIRBUS HELICOPTERS EC-145

Hex
4613D3
Octal
21411723
Decimal
4,592,595
Country
FI
Tail
OH-HNF
Type
EC45
No current signal · last broadcast 5h ago
Flights observed
69
Distinct callsigns
3
Country
FI
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 4613D3.

Country allocation

The ICAO 24-bit address 4613D3 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 3 distinct

Callsign Airline Flights Last seen
FIH50 - 51 2026-07-07
FIH60 - 12 2026-05-29
OHHNF - 6 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-07 FIH50 - Jul 7, 06:20 UTCJul 7, 07:35 UTC1h 15m
2026-07-05 FIH50 - Jul 5, 22:05 UTCJul 5, 22:15 UTC10m
2026-07-05 FIH50 - Jul 5, 07:35 UTCJul 5, 07:50 UTC15m
2026-07-05 FIH50 - Jul 5, 06:35 UTCJul 5, 06:45 UTC10m
2026-07-02 FIH50 - Jul 2, 09:50 UTCJul 2, 10:00 UTC10m
2026-07-02 FIH50 - Jul 2, 08:35 UTCJul 2, 08:45 UTC10m
2026-07-02 FIH50 - Jul 2, 06:35 UTCJul 2, 07:05 UTC30m
2026-06-30 FIH50 - Jun 30, 14:55 UTCJun 30, 17:05 UTC2h 10m
2026-06-30 FIH50 OUL → OUL Jun 30, 10:10 UTCJun 30, 10:55 UTC45m
2026-06-28 FIH50 OUL → OUL Jun 28, 08:19 UTCJun 28, 08:55 UTC35m
2026-06-27 FIH50 - Jun 27, 20:34 UTCJun 27, 21:10 UTC35m
2026-06-27 FIH50 - Jun 27, 16:14 UTCJun 27, 16:35 UTC20m
2026-06-27 FIH50 - Jun 27, 14:05 UTCJun 27, 14:39 UTC35m
2026-06-26 FIH50 - Jun 26, 18:54 UTCJun 26, 19:04 UTC10m
2026-06-26 FIH50 - Jun 26, 17:54 UTCJun 26, 18:04 UTC10m
2026-06-26 FIH50 - Jun 26, 09:39 UTCJun 26, 09:50 UTC10m
2026-06-25 FIH50 - Jun 25, 06:30 UTCJun 25, 07:34 UTC1h 5m
2026-06-24 FIH50 - Jun 24, 01:39 UTCJun 24, 01:49 UTC10m
2026-06-23 FIH50 - Jun 23, 12:09 UTCJun 23, 13:15 UTC1h 5m
2026-06-22 FIH50 - Jun 22, 16:40 UTCJun 22, 16:50 UTC10m
2026-06-22 FIH50 - Jun 22, 14:24 UTCJun 22, 15:24 UTC1h 0m
2026-06-21 FIH50 - Jun 21, 12:35 UTCJun 21, 14:19 UTC1h 45m
2026-06-21 FIH50 - Jun 21, 04:04 UTCJun 21, 04:54 UTC50m
2026-06-20 FIH50 - Jun 20, 18:14 UTCJun 20, 18:49 UTC35m
2026-06-20 FIH50 - Jun 20, 13:09 UTCJun 20, 13:19 UTC10m
2026-06-20 FIH50 - Jun 20, 11:49 UTCJun 20, 12:30 UTC40m
2026-06-19 FIH50 - Jun 19, 22:55 UTCJun 20, 00:04 UTC1h 10m
2026-06-19 FIH50 - Jun 19, 08:50 UTCJun 19, 09:09 UTC20m
2026-06-19 FIH50 - Jun 19, 02:59 UTCJun 19, 03:39 UTC40m
2026-06-18 FIH50 - Jun 18, 14:55 UTCJun 18, 15:55 UTC1h 0m
2026-06-17 FIH50 - Jun 17, 22:55 UTCJun 17, 23:30 UTC35m
2026-06-17 FIH50 - Jun 17, 15:55 UTCJun 17, 16:45 UTC50m
2026-06-16 FIH50 - Jun 16, 18:29 UTCJun 16, 18:39 UTC10m
2026-06-16 FIH50 - Jun 16, 13:09 UTCJun 16, 13:19 UTC10m
2026-06-15 FIH50 - Jun 15, 10:05 UTCJun 15, 10:24 UTC20m
2026-06-14 FIH50 OUL → OUL Jun 14, 16:05 UTCJun 14, 16:35 UTC30m
2026-06-14 FIH50 - Jun 14, 14:45 UTCJun 14, 15:00 UTC15m
2026-06-13 FIH50 - Jun 13, 18:30 UTCJun 13, 18:50 UTC20m
2026-06-13 FIH50 - Jun 13, 11:45 UTCJun 13, 12:25 UTC40m
2026-06-12 FIH50 - Jun 12, 15:50 UTCJun 12, 16:00 UTC10m
2026-06-11 FIH50 - Jun 11, 08:20 UTCJun 11, 08:45 UTC25m
2026-06-10 FIH50 OUL → OUL Jun 10, 23:50 UTCJun 11, 00:00 UTC10m
2026-06-10 FIH50 - Jun 10, 03:55 UTCJun 10, 04:15 UTC20m
2026-06-10 FIH50 - Jun 10, 03:05 UTCJun 10, 03:15 UTC10m
2026-06-09 FIH50 - Jun 9, 10:55 UTCJun 9, 11:05 UTC10m
2026-06-08 FIH50 - Jun 8, 17:00 UTCJun 8, 17:25 UTC25m
2026-06-07 FIH50 - Jun 7, 13:35 UTCJun 7, 14:10 UTC35m
2026-06-06 FIH50 - Jun 6, 13:09 UTCJun 6, 13:20 UTC10m
2026-06-06 FIH50 OUL → OUL Jun 6, 07:05 UTCJun 6, 07:40 UTC35m
2026-06-05 FIH50 - Jun 5, 16:50 UTCJun 5, 17:00 UTC10m

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

Mode-S 4613D3 frequently asked

What is Mode-S code 4613D3?
4613D3 is an ICAO 24-bit transponder address. Allocated to Finland. Assigned to OH-HNF.
Where is Mode-S 4613D3 registered?
Mode-S code 4613D3 is allocated to Finland (FI). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4613D3 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4613D3, octal 21411723, decimal 4,592,595.
What flights does 4613D3 operate?
Mode-S 4613D3 has broadcast 3 distinct callsigns, including FIH50, FIH60, OHHNF.