Apparatus

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sensors Mode-S transponder

4601FD

ICAO 24-bit transponder address · allocated to Finland

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

Hex
4601FD
Octal
21400775
Decimal
4,588,029
Country
FI
Tail
OH-ATP
Type
AT75
Transponder active on ground
Flights observed
542
Distinct callsigns
20
Country
FI
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 4601FD.

Country allocation

The ICAO 24-bit address 4601FD 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
FIN9VM Finnair 19 2026-06-08
FIN1KH Finnair 19 2026-06-08
FIN5Y - 12 2026-07-12
FIN27H - 12 2026-07-12
FIN54C Finnair 11 2026-06-11
FIN4TA Finnair 11 2026-06-11
FIN2NP Finnair 11 2026-06-12
FIN1KE Finnair 11 2026-06-12
FIN4EL - 9 2026-07-12
FIN3ZP - 9 2026-07-12
FIN1TJ - 9 2026-07-12
FIN6PH Finnair 8 2026-05-28
FIN5PH Finnair 8 2026-06-11
FIN5AZ - 8 2026-07-12
FIN4QA - 8 2026-07-11
FIN4D Finnair 8 2026-05-28
FIN3PT - 8 2026-07-10
FIN317 Finnair 8 2026-07-10
FIN1DK Finnair 8 2026-06-11
FIN1045 Finnair 8 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FIN89W - Jul 14, 15:40 UTCJul 14, 17:05 UTC1h 25m
2026-07-14 FIN1RE HEL → VNO Jul 14, 13:40 UTCJul 14, 15:10 UTC1h 30m
2026-07-14 FIN2EZ - Jul 14, 10:00 UTCJul 14, 10:30 UTC30m
2026-07-14 FIN2EZ - Jul 14, 08:35 UTCJul 14, 09:10 UTC35m
2026-07-14 FIN1175 - Jul 14, 05:40 UTCJul 14, 07:35 UTC1h 55m
2026-07-13 FIN1044 - Jul 13, 12:15 UTCJul 13, 12:55 UTC40m
2026-07-13 FIN5YF - Jul 13, 11:00 UTCJul 13, 11:40 UTC40m
2026-07-13 FIN9T - Jul 13, 09:55 UTCJul 13, 10:15 UTC20m
2026-07-13 FIN7DE HEL → TLL Jul 13, 08:55 UTCJul 13, 09:15 UTC20m
2026-07-13 FIN434 HEL → HEL Jul 13, 03:25 UTCJul 13, 06:20 UTC2h 55m
2026-07-12 FIN5AZ - Jul 12, 19:45 UTCJul 12, 20:05 UTC20m
2026-07-12 FIN4EL - Jul 12, 18:55 UTCJul 12, 19:15 UTC20m
2026-07-12 FIN27H TLL → HEL Jul 12, 17:55 UTCJul 12, 18:15 UTC20m
2026-07-12 FIN5Y HEL → TLL Jul 12, 17:05 UTCJul 12, 17:25 UTC20m
2026-07-12 FIN3ZP - Jul 12, 15:15 UTCJul 12, 16:10 UTC55m
2026-07-12 FIN1TJ - Jul 12, 13:40 UTCJul 12, 14:20 UTC40m
2026-07-12 FIN26B - Jul 12, 10:45 UTCJul 12, 11:40 UTC55m
2026-07-12 FIN3KC HEL → KUO Jul 12, 09:25 UTCJul 12, 10:15 UTC50m
2026-07-12 FIN312 - Jul 12, 07:45 UTCJul 12, 08:40 UTC55m
2026-07-12 FIN312 - Jul 12, 06:55 UTCJul 12, 07:05 UTC10m
2026-07-12 FIN311 - Jul 12, 06:01 UTCJul 12, 06:10 UTC10m
2026-07-12 FIN311 - Jul 12, 04:35 UTCJul 12, 05:20 UTC45m
2026-07-11 FIN9Y - Jul 11, 11:40 UTCJul 11, 12:55 UTC1h 15m
2026-07-11 FIN7KL - Jul 11, 06:05 UTCJul 11, 07:20 UTC1h 15m
2026-07-11 FIN4QA - Jul 11, 02:35 UTCJul 11, 03:30 UTC55m
2026-07-10 FIN3PT - Jul 10, 21:20 UTCJul 10, 22:05 UTC45m
2026-07-10 FIN318 - Jul 10, 18:55 UTCJul 10, 19:40 UTC45m
2026-07-10 FIN317 VAA → UME Jul 10, 17:15 UTCJul 10, 17:25 UTC10m
2026-07-10 FIN317 VAA → UME Jul 10, 15:50 UTCJul 10, 16:35 UTC45m
2026-07-10 FIN6KB TLL → HEL Jul 10, 14:40 UTCJul 10, 15:05 UTC25m
2026-07-10 FIN9KH HEL → TLL Jul 10, 13:50 UTCJul 10, 14:10 UTC20m
2026-07-10 FIN36J - Jul 10, 12:20 UTCJul 10, 12:55 UTC35m
2026-07-10 FIN8NP - Jul 10, 10:55 UTCJul 10, 11:35 UTC40m
2026-07-10 FIN88T BGO → HEL Jul 10, 07:00 UTCJul 10, 09:30 UTC2h 30m
2026-07-10 FIN30M HEL → BGO Jul 10, 03:50 UTCJul 10, 06:15 UTC2h 25m
2026-07-09 FCM6M - Jul 9, 10:00 UTCJul 9, 14:30 UTC4h 30m
2026-06-12 FCM5M - Jun 12, 10:30 UTCJun 12, 14:20 UTC3h 50m
2026-06-12 FIN2NP RIX → HEL Jun 12, 08:25 UTCJun 12, 09:20 UTC55m
2026-06-12 FIN1KE HEL → RIX Jun 12, 06:35 UTCJun 12, 07:35 UTC1h 0m
2026-06-12 FIN5TB TLL → HEL Jun 12, 05:30 UTCJun 12, 05:55 UTC25m
2026-06-12 FIN4LB HEL → TLL Jun 12, 04:30 UTCJun 12, 04:50 UTC20m
2026-06-12 FIN9EP TLL → HEL Jun 12, 03:15 UTCJun 12, 03:40 UTC25m
2026-06-11 FIN5PH HEL → TLL Jun 11, 22:30 UTCJun 11, 22:55 UTC25m
2026-06-11 FIN5AZ TLL → HEL Jun 11, 21:35 UTCJun 11, 21:50 UTC15m
2026-06-11 FIN4EL HEL → TLL Jun 11, 20:25 UTCJun 11, 21:00 UTC35m
2026-06-11 FIN27H TLL → HEL Jun 11, 19:10 UTCJun 11, 19:35 UTC25m
2026-06-11 FIN5Y HEL → TLL Jun 11, 18:05 UTCJun 11, 18:30 UTC25m
2026-06-11 FIN6RK KOK → HEL Jun 11, 16:15 UTCJun 11, 17:15 UTC1h 0m
2026-06-11 FIN1DK HEL → KOK Jun 11, 14:45 UTCJun 11, 15:35 UTC50m
2026-06-11 FIN4TA TLL → HEL Jun 11, 13:35 UTCJun 11, 13:55 UTC20m

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

Mode-S 4601FD frequently asked

What is Mode-S code 4601FD?
4601FD is an ICAO 24-bit transponder address. Allocated to Finland. Assigned to OH-ATP.
Where is Mode-S 4601FD registered?
Mode-S code 4601FD is allocated to Finland (FI). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4601FD broadcasting right now?
Mode-S 4601FD is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4601FD, octal 21400775, decimal 4,588,029.
What flights does 4601FD operate?
Mode-S 4601FD has broadcast 20 distinct callsigns, including FIN9VM, FIN1KH, FIN5Y, FIN27H, FIN54C.