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 Jul 26, 20:25 UTC
Flights observed
750
Distinct callsigns
20
Country
FI
Last broadcast
Jul 26, 20:25 UTC

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 - 16 2026-07-01
FIN2KK - 16 2026-07-01
FIN592 Finnair 14 2026-07-19
FIN4PK Finnair 14 2026-07-19
FIN5CE - 13 2026-07-22
FIN3V Finnair 12 2026-07-25
FIN2XM Finnair 12 2026-07-25
FIN7BT - 11 2026-07-22
FIN396 - 11 2026-06-26
FIN321 Finnair 11 2026-07-24
FIN2EZ Finnair 11 2026-07-17
FIN13B Finnair 11 2026-07-24
FIN8G - 10 2026-07-21
FIN594 Finnair 10 2026-05-26
FIN58E - 10 2026-06-25
FIN42T - 10 2026-07-17
FIN322 Finnair 10 2026-07-25
FIN26B Finnair 10 2026-07-26
FIN1077 - 10 2026-07-24
FIN9T - 9 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FIN9EJ VNO → HEL Jul 26, 18:50 UTCJul 26, 20:20 UTC1h 30m
2026-07-26 FIN1PL HEL → VNO Jul 26, 16:50 UTCJul 26, 18:20 UTC1h 30m
2026-07-26 FIN4TA TLL → HEL Jul 26, 15:50 UTCJul 26, 16:10 UTC20m
2026-07-26 FIN54C HEL → TLL Jul 26, 14:50 UTCJul 26, 15:10 UTC20m
2026-07-26 FIN26B KUO → HEL Jul 26, 11:00 UTCJul 26, 11:55 UTC55m
2026-07-26 FIN3KC HEL → KUO Jul 26, 09:35 UTCJul 26, 10:25 UTC50m
2026-07-26 FIN312 UME → VAA Jul 26, 08:05 UTCJul 26, 08:50 UTC45m
2026-07-26 FIN311 HEL → VAA Jul 26, 04:35 UTCJul 26, 05:15 UTC40m
2026-07-25 FIN6MB RVN → HEL Jul 25, 18:45 UTCJul 25, 20:00 UTC1h 15m
2026-07-25 FIN4N HEL → BMA Jul 25, 16:25 UTCJul 25, 17:35 UTC1h 10m
2026-07-25 FIN3ZP - Jul 25, 14:55 UTCJul 25, 15:40 UTC45m
2026-07-25 FIN1TJ - Jul 25, 13:35 UTCJul 25, 14:15 UTC40m
2026-07-25 FIN23P RIX → HEL Jul 25, 11:05 UTCJul 25, 12:10 UTC1h 5m
2026-07-25 FIN1079 HEL → RIX Jul 25, 09:25 UTCJul 25, 10:25 UTC1h 0m
2026-07-25 FIN2XM VNO → HEL Jul 25, 07:05 UTCJul 25, 08:35 UTC1h 30m
2026-07-25 FIN3V HEL → VNO Jul 25, 04:55 UTCJul 25, 06:20 UTC1h 25m
2026-07-25 FIN322 VAA → HEL Jul 25, 02:50 UTCJul 25, 03:40 UTC50m
2026-07-24 FIN321 HEL → VAA Jul 24, 21:30 UTCJul 24, 22:15 UTC45m
2026-07-24 FIN13B RIX → HEL Jul 24, 18:55 UTCJul 24, 19:55 UTC1h 0m
2026-07-24 FIN1077 HEL → RIX Jul 24, 17:15 UTCJul 24, 18:15 UTC1h 0m
2026-07-24 FIN7152 TLL → HEL Jul 24, 15:50 UTCJul 24, 16:15 UTC25m
2026-07-24 FIN6AX HEL → TLL Jul 24, 15:00 UTCJul 24, 15:20 UTC20m
2026-07-24 FIN31L TLL → HEL Jul 24, 11:50 UTCJul 24, 12:15 UTC25m
2026-07-24 FIN6KT HEL → TLL Jul 24, 10:50 UTCJul 24, 11:10 UTC20m
2026-07-24 FIN9LG KAJ → HEL Jul 24, 09:00 UTCJul 24, 10:05 UTC1h 5m
2026-07-24 FIN9B HEL → KAJ Jul 24, 07:15 UTCJul 24, 08:15 UTC1h 0m
2026-07-24 FIN58G RIX → HEL Jul 24, 05:20 UTCJul 24, 06:15 UTC55m
2026-07-24 FIN7MR HEL → RIX Jul 24, 03:50 UTCJul 24, 04:45 UTC55m
2026-07-23 FIN4W VNO → HEL Jul 23, 11:00 UTCJul 23, 12:35 UTC1h 35m
2026-07-23 FIN80U HEL → VNO Jul 23, 08:30 UTCJul 23, 10:00 UTC1h 30m
2026-07-23 FIN5EW VBY → HEL Jul 23, 06:35 UTCJul 23, 07:45 UTC1h 10m
2026-07-23 FIN881 HEL → VBY Jul 23, 04:45 UTCJul 23, 05:50 UTC1h 5m
2026-07-22 FIN7BT - Jul 22, 16:20 UTCJul 22, 17:20 UTC1h 0m
2026-07-22 FIN5CE - Jul 22, 14:40 UTCJul 22, 15:45 UTC1h 5m
2026-07-22 FIN4TA - Jul 22, 13:30 UTCJul 22, 13:45 UTC15m
2026-07-22 FIN54C HEL → TLL Jul 22, 12:40 UTCJul 22, 12:55 UTC15m
2026-07-22 FIN26B KUO → HEL Jul 22, 11:10 UTCJul 22, 11:40 UTC30m
2026-07-22 FIN3V HEL → VNO Jul 22, 04:35 UTCJul 22, 05:25 UTC50m
2026-07-22 FIN4QA HEL → AMS Jul 22, 02:25 UTCJul 22, 03:15 UTC50m
2026-07-21 FIN3PT HEL → KUO Jul 21, 21:20 UTCJul 21, 22:10 UTC50m
2026-07-21 FIN13B RIX → HEL Jul 21, 18:40 UTCJul 21, 19:35 UTC55m
2026-07-21 FIN1077 HEL → RIX Jul 21, 17:15 UTCJul 21, 18:05 UTC50m
2026-07-21 FIN8G HEL → HEL Jul 21, 14:10 UTCJul 21, 16:25 UTC2h 15m
2026-07-21 FIN36J - Jul 21, 12:35 UTCJul 21, 13:10 UTC35m
2026-07-21 FIN8NP HEL → TAY Jul 21, 11:20 UTCJul 21, 12:00 UTC40m
2026-07-21 FIN9T TLL → HEL Jul 21, 10:20 UTCJul 21, 10:40 UTC20m
2026-07-21 FIN7DE HEL → TLL Jul 21, 09:20 UTCJul 21, 09:40 UTC20m
2026-07-21 FIN2XM VNO → HEL Jul 21, 07:10 UTCJul 21, 08:25 UTC1h 15m
2026-07-21 FIN3V HEL → VNO Jul 21, 04:45 UTCJul 21, 06:10 UTC1h 25m
2026-07-21 FIN322 VAA → HEL Jul 21, 02:50 UTCJul 21, 03:40 UTC50m

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 Jul 26, 20:25 UTC.
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, FIN592, FIN4PK, FIN5CE.