Apparatus

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sensors Mode-S transponder

4601F5

ICAO 24-bit transponder address · allocated to Finland

Currently assigned to OH-ATH · ATR-72-500

Hex
4601F5
Octal
21400765
Decimal
4,588,021
Country
FI
Tail
OH-ATH
Type
AT75
No current signal · last broadcast 38m ago
Flights observed
360
Distinct callsigns
20
Country
FI
Last broadcast
38m ago

Last known position

Most recent position reported by Mode-S 4601F5.

Country allocation

The ICAO 24-bit address 4601F5 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 20 distinct

Callsign Airline Flights Last seen
FIN541 Finnair 14 2026-05-11
FIN2KK Finnair 14 2026-05-11
FIN594 Finnair 10 2026-05-26
FIN593 Finnair 9 2026-05-26
FIN396 Finnair 9 2026-05-29
FIN592 Finnair 8 2026-05-25
FIN58E Finnair 8 2026-05-28
FIN4PK Finnair 8 2026-05-25
FIN5CE Finnair 7 2026-05-29
FIN7BT Finnair 6 2026-05-29
FIN2XM Finnair 6 2026-05-27
FIN1T Finnair 6 2026-05-14
FIN9VM Finnair 5 2026-05-26
FIN8KH Finnair 5 2026-05-15
FIN3V Finnair 5 2026-05-27
FIN26B Finnair 5 2026-04-25
FIN1KH Finnair 5 2026-05-26
FIN9T Finnair 4 2026-05-30
FIN947 Finnair 4 2026-05-14
FIN89W Finnair 4 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 FIN8PK HEL → KAO May 30, 14:10 UTCMay 30, 15:15 UTC1h 5m
2026-05-30 FIN5NB KAO → HEL May 30, 10:55 UTCMay 30, 12:10 UTC1h 15m
2026-05-30 FIN489 HEL → KAO May 30, 08:30 UTCMay 30, 09:45 UTC1h 15m
2026-05-30 FIN9T TLL → HEL May 30, 07:10 UTCMay 30, 07:30 UTC20m
2026-05-30 FIN7DE HEL → TLL May 30, 06:20 UTCMay 30, 06:35 UTC15m
2026-05-30 FIN6PH HEL → VNO May 30, 05:25 UTCMay 30, 05:45 UTC20m
2026-05-30 FIN4D HEL → TLL May 30, 04:35 UTCMay 30, 04:50 UTC15m
2026-05-30 FIN9EP TLL → HEL May 30, 03:10 UTCMay 30, 03:35 UTC25m
2026-05-29 FIN5PH HEL → TLL May 29, 21:50 UTCMay 29, 22:10 UTC20m
2026-05-29 FIN6KC CPH → HEL May 29, 18:10 UTCMay 29, 20:00 UTC1h 50m
2026-05-29 FIN7BT KAJ → HEL May 29, 16:30 UTCMay 29, 17:30 UTC1h 0m
2026-05-29 FIN5CE HEL → KAJ May 29, 14:45 UTCMay 29, 15:55 UTC1h 10m
2026-05-29 FIN31L TLL → HEL May 29, 12:20 UTCMay 29, 12:40 UTC20m
2026-05-29 FIN6KT HEL → TLL May 29, 11:25 UTCMay 29, 11:45 UTC20m
2026-05-29 FIN9T TLL → HEL May 29, 10:15 UTCMay 29, 10:35 UTC20m
2026-05-29 FIN7DE HEL → TLL May 29, 09:05 UTCMay 29, 09:25 UTC20m
2026-05-29 FIN3RM MHQ → HEL May 29, 07:25 UTCMay 29, 08:00 UTC35m
2026-05-29 FIN6NC - May 29, 06:00 UTCMay 29, 06:45 UTC45m
2026-05-29 FIN396 KOK → HEL May 29, 02:55 UTCMay 29, 03:45 UTC50m
2026-05-28 FIN58E HEL → KOK May 28, 21:00 UTCMay 28, 21:55 UTC55m
2026-05-28 FIN89W VNO → HEL May 28, 15:40 UTCMay 28, 17:20 UTC1h 40m
2026-05-28 FIN1RE HEL → VNO May 28, 13:40 UTCMay 28, 15:00 UTC1h 20m
2026-05-27 FIN6RK KOK → HEL May 27, 16:15 UTCMay 27, 17:10 UTC55m
2026-05-27 FIN1DK HEL → KOK May 27, 14:45 UTCMay 27, 15:45 UTC1h 0m
2026-05-27 FIN2XM VNO → HEL May 27, 07:15 UTCMay 27, 08:55 UTC1h 40m
2026-05-27 FIN3V HEL → VNO May 27, 05:04 UTCMay 27, 06:29 UTC1h 25m
2026-05-27 FIN396 KOK → HEL May 27, 02:49 UTCMay 27, 03:45 UTC55m
2026-05-26 FIN58E HEL → KOK May 26, 20:34 UTCMay 26, 21:29 UTC55m
2026-05-26 FIN594 KTT → HEL May 26, 18:05 UTCMay 26, 19:20 UTC1h 15m
2026-05-26 FIN594 KTT → HEL May 26, 16:50 UTCMay 26, 17:05 UTC15m
2026-05-26 FIN593 HEL → KTT May 26, 15:24 UTCMay 26, 15:49 UTC25m
2026-05-26 FIN593 HEL → KTT May 26, 13:00 UTCMay 26, 14:24 UTC1h 25m
2026-05-26 FIN1KH VAA → HEL May 26, 11:09 UTCMay 26, 11:54 UTC45m
2026-05-26 FIN9VM HEL → VAA May 26, 09:29 UTCMay 26, 10:20 UTC50m
2026-05-26 FIN2NP RIX → HEL May 26, 07:49 UTCMay 26, 08:50 UTC1h 0m
2026-05-26 FIN1KE HEL → RIX May 26, 06:29 UTCMay 26, 07:15 UTC45m
2026-05-26 FIN5TB TLL → HEL May 26, 05:25 UTCMay 26, 05:45 UTC20m
2026-05-26 FIN4LB HEL → TLL May 26, 04:30 UTCMay 26, 04:50 UTC20m
2026-05-26 FIN322 VAA → HEL May 26, 02:55 UTCMay 26, 03:40 UTC45m
2026-05-25 FIN321 HEL → VAA May 25, 21:19 UTCMay 25, 22:05 UTC45m
2026-05-25 FIN6KC CPH → HEL May 25, 18:45 UTCMay 25, 20:40 UTC1h 54m
2026-05-25 FIN89W VNO → HEL May 25, 16:15 UTCMay 25, 18:05 UTC1h 50m
2026-05-25 FIN1RE HEL → VNO May 25, 14:20 UTCMay 25, 15:40 UTC1h 20m
2026-05-25 FIN592 KTT → HEL May 25, 10:15 UTCMay 25, 12:15 UTC2h 0m
2026-05-25 FIN592 KTT → HEL May 25, 09:10 UTCMay 25, 09:25 UTC15m
2026-05-25 FIN4PK HEL → IVL May 25, 07:40 UTCMay 25, 08:00 UTC20m
2026-05-25 FIN4PK HEL → IVL May 25, 05:05 UTCMay 25, 06:35 UTC1h 30m
2026-05-25 FIN418 KAJ → HEL May 25, 02:20 UTCMay 25, 03:20 UTC1h 0m
2026-05-24 FIN417 HEL → KAJ May 24, 20:55 UTCMay 24, 21:50 UTC55m
2026-05-24 FIN5AZ TLL → HEL May 24, 19:40 UTCMay 24, 20:10 UTC30m

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

Mode-S 4601F5 frequently asked

What is Mode-S code 4601F5?
4601F5 is an ICAO 24-bit transponder address. Allocated to Finland. Assigned to OH-ATH.
Where is Mode-S 4601F5 registered?
Mode-S code 4601F5 is allocated to Finland (FI). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4601F5 broadcasting right now?
No active broadcast right now. Last signal was 38m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4601F5, octal 21400765, decimal 4,588,021.
What flights does 4601F5 operate?
Mode-S 4601F5 has broadcast 20 distinct callsigns, including FIN541, FIN2KK, FIN594, FIN593, FIN396.