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
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
650
Distinct callsigns
20
Country
FI
Last broadcast
Jul 26, 21:15 UTC

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 21 2026-07-26
FIN1KH Finnair 21 2026-07-26
FIN5Y - 15 2026-07-22
FIN27H Finnair 15 2026-07-22
FIN54C - 13 2026-07-21
FIN4TA - 13 2026-07-21
FIN2NP Finnair 13 2026-07-26
FIN1KE Finnair 13 2026-07-26
FIN4EL - 12 2026-07-22
FIN5AZ Finnair 11 2026-07-22
FIN6PH Finnair 10 2026-07-25
FIN5PH Finnair 10 2026-07-22
FIN4QA Finnair 10 2026-07-18
FIN4D Finnair 10 2026-07-25
FIN3PT Finnair 10 2026-07-17
FIN9EP Finnair 9 2026-07-23
FIN7DE Finnair 9 2026-07-25
FIN5TB Finnair 9 2026-07-23
FIN4LB - 9 2026-07-23
FIN3ZP - 9 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FIN7058 CPH → HEL Jul 26, 20:00 UTCJul 26, 21:15 UTC1h 15m
2026-07-26 FIN1147 HEL → WAW Jul 26, 16:20 UTCJul 26, 19:00 UTC2h 40m
2026-07-26 FIN6YP KUO → HEL Jul 26, 13:05 UTCJul 26, 15:15 UTC2h 10m
2026-07-26 FIN1KH VAA → HEL Jul 26, 11:05 UTCJul 26, 11:55 UTC50m
2026-07-26 FIN9VM HEL → VAA Jul 26, 09:35 UTCJul 26, 10:20 UTC45m
2026-07-26 FIN2NP RIX → HEL Jul 26, 07:35 UTCJul 26, 08:35 UTC1h 0m
2026-07-26 FIN1KE HEL → RIX Jul 26, 06:00 UTCJul 26, 07:00 UTC1h 1m
2026-07-25 FIN89W - Jul 25, 15:30 UTCJul 25, 17:00 UTC1h 30m
2026-07-25 FIN1RE - Jul 25, 13:25 UTCJul 25, 14:55 UTC1h 30m
2026-07-25 FIN4W VNO → HEL Jul 25, 10:40 UTCJul 25, 12:20 UTC1h 40m
2026-07-25 FIN80U HEL → VNO Jul 25, 08:25 UTCJul 25, 09:55 UTC1h 30m
2026-07-25 FIN9T TLL → HEL Jul 25, 07:10 UTCJul 25, 07:35 UTC25m
2026-07-25 FIN7DE HEL → TLL Jul 25, 06:15 UTCJul 25, 06:35 UTC20m
2026-07-25 FIN6PH HEL → VNO Jul 25, 05:20 UTCJul 25, 05:40 UTC20m
2026-07-25 FIN4D HEL → TLL Jul 25, 04:25 UTCJul 25, 04:45 UTC20m
2026-07-24 FIN7KE MHQ → HEL Jul 24, 18:20 UTCJul 24, 20:15 UTC1h 55m
2026-07-24 FIN7BT - Jul 24, 16:40 UTCJul 24, 17:45 UTC1h 5m
2026-07-24 FIN5CE - Jul 24, 15:05 UTCJul 24, 16:05 UTC1h 0m
2026-07-24 FIN1LT - Jul 24, 13:55 UTCJul 24, 14:15 UTC20m
2026-07-24 FIN5RG HEL → TLL Jul 24, 13:00 UTCJul 24, 13:20 UTC20m
2026-07-23 FIN7PH KEM → HEL Jul 23, 13:25 UTCJul 23, 14:35 UTC1h 10m
2026-07-23 FIN8Q HEL → KEM Jul 23, 11:15 UTCJul 23, 12:35 UTC1h 20m
2026-07-23 FIN9T TLL → HEL Jul 23, 10:05 UTCJul 23, 10:25 UTC20m
2026-07-23 FIN7DE HEL → TLL Jul 23, 09:05 UTCJul 23, 09:25 UTC20m
2026-07-23 FIN5TB TLL → HEL Jul 23, 05:15 UTCJul 23, 05:35 UTC20m
2026-07-23 FIN4LB HEL → TLL Jul 23, 04:20 UTCJul 23, 04:40 UTC20m
2026-07-23 FIN9EP TLL → HEL Jul 23, 03:05 UTCJul 23, 03:25 UTC20m
2026-07-22 FIN5PH HEL → TLL Jul 22, 21:45 UTCJul 22, 22:05 UTC20m
2026-07-22 FIN5AZ TLL → HEL Jul 22, 20:05 UTCJul 22, 20:35 UTC30m
2026-07-22 FIN4EL HEL → TLL Jul 22, 19:20 UTCJul 22, 19:40 UTC20m
2026-07-22 FIN27H TLL → HEL Jul 22, 18:15 UTCJul 22, 18:40 UTC25m
2026-07-22 FIN5Y HEL → TLL Jul 22, 17:30 UTCJul 22, 17:50 UTC20m
2026-07-22 FIN2MC - Jul 22, 15:30 UTCJul 22, 16:30 UTC1h 0m
2026-07-22 FIN6WR HEL → RIX Jul 22, 13:55 UTCJul 22, 14:55 UTC1h 0m
2026-07-22 FIN4W - Jul 22, 11:10 UTCJul 22, 12:20 UTC1h 10m
2026-07-22 FIN881 HEL → VBY Jul 22, 04:40 UTCJul 22, 05:25 UTC45m
2026-07-21 FIN5AZ TLL → HEL Jul 21, 22:10 UTCJul 21, 22:30 UTC20m
2026-07-21 FIN4EL - Jul 21, 21:25 UTCJul 21, 21:45 UTC20m
2026-07-21 FIN27H TLL → HEL Jul 21, 20:30 UTCJul 21, 20:50 UTC20m
2026-07-21 FIN5Y - Jul 21, 19:45 UTCJul 21, 20:00 UTC15m
2026-07-21 FIN950 TRD → HEL Jul 21, 17:15 UTCJul 21, 19:00 UTC1h 45m
2026-07-21 FIN949 HEL → TRD Jul 21, 14:45 UTCJul 21, 16:40 UTC1h 55m
2026-07-21 FIN4TA - Jul 21, 13:35 UTCJul 21, 13:55 UTC20m
2026-07-21 FIN54C HEL → TLL Jul 21, 12:35 UTCJul 21, 12:55 UTC20m
2026-07-21 FIN1KH - Jul 21, 10:55 UTCJul 21, 11:45 UTC50m
2026-07-21 FIN9VM HEL → VAA Jul 21, 09:25 UTCJul 21, 10:05 UTC40m
2026-07-21 FIN2NP RIX → HEL Jul 21, 07:35 UTCJul 21, 08:35 UTC1h 0m
2026-07-21 FIN1KE HEL → RIX Jul 21, 06:00 UTCJul 21, 06:55 UTC55m
2026-07-21 FIN5TB - Jul 21, 05:00 UTCJul 21, 05:15 UTC15m
2026-07-21 FIN4LB HEL → TLL Jul 21, 04:10 UTCJul 21, 04:30 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?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
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.