Apparatus

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sensors Mode-S transponder

4601FA

ICAO 24-bit transponder address · allocated to Finland

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

Hex
4601FA
Octal
21400772
Decimal
4,588,026
Country
FI
Tail
OH-ATM
Type
AT75
No current signal · last broadcast 4d ago
Flights observed
728
Distinct callsigns
20
Country
FI
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S 4601FA.

Country allocation

The ICAO 24-bit address 4601FA 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
FIN2KK - 20 2026-06-30
FIN541 - 18 2026-06-30
FIN6YP - 15 2026-07-06
FIN42T - 15 2026-07-06
FIN2MC Finnair 14 2026-06-26
FIN6WR Finnair 13 2026-06-26
FIN4QA - 13 2026-07-04
FIN322 - 13 2026-06-12
FIN3PT - 12 2026-07-03
FIN321 Finnair 12 2026-06-11
FIN6PH - 11 2026-07-08
FIN54C - 11 2026-07-02
FIN4TA - 11 2026-07-02
FIN9EJ - 10 2026-06-24
FIN4EL - 10 2026-07-02
FIN4D - 10 2026-07-08
FIN23P - 10 2026-07-05
FIN1PL - 10 2026-06-24
FIN9KH Finnair 9 2026-07-07
FIN9EP - 9 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-09 FCM5M HEL → LJU Jul 9, 04:20 UTCJul 9, 07:30 UTC3h 10m
2026-07-08 FIN7PJ - Jul 8, 17:10 UTCJul 8, 19:15 UTC2h 5m
2026-07-08 FIN4DU - Jul 8, 13:55 UTCJul 8, 16:15 UTC2h 20m
2026-07-08 FIN9T - Jul 8, 09:50 UTCJul 8, 10:05 UTC15m
2026-07-08 FIN7DE HEL → TLL Jul 8, 08:55 UTCJul 8, 09:15 UTC20m
2026-07-08 FIN6PH TLL → HEL Jul 8, 07:55 UTCJul 8, 08:15 UTC20m
2026-07-08 FIN4D HEL → TLL Jul 8, 07:10 UTCJul 8, 07:25 UTC15m
2026-07-08 FIN58G - Jul 8, 05:20 UTCJul 8, 06:15 UTC55m
2026-07-08 FIN7MR - Jul 8, 03:50 UTCJul 8, 04:40 UTC50m
2026-07-07 FIN6KB TLL → HEL Jul 7, 14:45 UTCJul 7, 15:05 UTC20m
2026-07-07 FIN9KH HEL → TLL Jul 7, 13:45 UTCJul 7, 14:05 UTC20m
2026-07-07 FIN4W - Jul 7, 10:35 UTCJul 7, 12:15 UTC1h 40m
2026-07-07 FIN80U - Jul 7, 08:35 UTCJul 7, 09:55 UTC1h 20m
2026-07-07 FIN5EW VBY → HEL Jul 7, 06:40 UTCJul 7, 07:45 UTC1h 5m
2026-07-07 FIN881 HEL → VBY Jul 7, 04:45 UTCJul 7, 05:50 UTC1h 5m
2026-07-06 FIN7NP - Jul 6, 20:35 UTCJul 6, 21:05 UTC30m
2026-07-06 FIN5UT - Jul 6, 16:20 UTCJul 6, 18:25 UTC2h 5m
2026-07-06 FIN6YP - Jul 6, 14:50 UTCJul 6, 15:40 UTC50m
2026-07-06 FIN42T - Jul 6, 13:25 UTCJul 6, 14:15 UTC50m
2026-07-06 FIN1KH - Jul 6, 11:10 UTCJul 6, 12:10 UTC1h 0m
2026-07-06 FIN9VM - Jul 6, 09:40 UTCJul 6, 10:20 UTC40m
2026-07-06 FIN2NP - Jul 6, 07:35 UTCJul 6, 08:30 UTC55m
2026-07-06 FIN1KE - Jul 6, 06:00 UTCJul 6, 06:55 UTC55m
2026-07-06 FIN5TB - Jul 6, 05:00 UTCJul 6, 05:25 UTC25m
2026-07-06 FIN4LB HEL → TLL Jul 6, 04:10 UTCJul 6, 04:25 UTC15m
2026-07-06 FIN9EP TLL → HEL Jul 6, 03:00 UTCJul 6, 03:20 UTC20m
2026-07-05 FIN5PH HEL → TLL Jul 5, 21:45 UTCJul 5, 22:05 UTC20m
2026-07-05 FIN7NP - Jul 5, 19:00 UTCJul 5, 21:00 UTC2h 0m
2026-07-05 FIN5UT - Jul 5, 16:10 UTCJul 5, 18:15 UTC2h 5m
2026-07-05 FIN23P - Jul 5, 11:50 UTCJul 5, 12:50 UTC1h 0m
2026-07-05 FIN1079 - Jul 5, 09:45 UTCJul 5, 10:45 UTC1h 0m
2026-07-05 FIN5EW VBY → HEL Jul 5, 07:45 UTCJul 5, 08:50 UTC1h 5m
2026-07-05 FIN881 HEL → VBY Jul 5, 05:50 UTCJul 5, 06:55 UTC1h 5m
2026-07-04 FIN950 TRD → HEL Jul 4, 18:50 UTCJul 4, 20:40 UTC1h 50m
2026-07-04 FIN949 - Jul 4, 16:10 UTCJul 4, 18:05 UTC1h 55m
2026-07-04 FIN6KB TLL → HEL Jul 4, 15:00 UTCJul 4, 15:20 UTC20m
2026-07-04 FIN9KH HEL → TLL Jul 4, 14:00 UTCJul 4, 14:20 UTC20m
2026-07-04 FIN4W VNO → HEL Jul 4, 11:20 UTCJul 4, 13:05 UTC1h 45m
2026-07-04 FIN80U HEL → VNO Jul 4, 09:05 UTCJul 4, 10:40 UTC1h 35m
2026-07-04 FIN9T - Jul 4, 07:05 UTCJul 4, 07:25 UTC20m
2026-07-04 FIN7DE HEL → TLL Jul 4, 06:10 UTCJul 4, 06:25 UTC15m
2026-07-04 FIN6PH - Jul 4, 05:05 UTCJul 4, 05:25 UTC20m
2026-07-04 FIN4D HEL → TLL Jul 4, 04:15 UTCJul 4, 04:35 UTC20m
2026-07-04 FIN4QA - Jul 4, 02:35 UTCJul 4, 03:25 UTC50m
2026-07-03 FIN3PT HEL → KUO Jul 3, 21:15 UTCJul 3, 22:05 UTC50m
2026-07-03 FIN7KE - Jul 3, 19:15 UTCJul 3, 19:55 UTC40m
2026-07-03 FIN6KC - Jul 3, 18:05 UTCJul 3, 18:45 UTC40m
2026-07-03 FIN6RK KOK → HEL Jul 3, 16:05 UTCJul 3, 16:55 UTC50m
2026-07-03 FIN1DK - Jul 3, 14:40 UTCJul 3, 15:30 UTC50m
2026-07-03 FIN7HR TLL → HEL Jul 3, 13:00 UTCJul 3, 13:20 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-ATM page for operator, model, and routing details .

Mode-S 4601FA frequently asked

What is Mode-S code 4601FA?
4601FA is an ICAO 24-bit transponder address. Allocated to Finland. Assigned to OH-ATM.
Where is Mode-S 4601FA registered?
Mode-S code 4601FA is allocated to Finland (FI). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4601FA broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4601FA, octal 21400772, decimal 4,588,026.
What flights does 4601FA operate?
Mode-S 4601FA has broadcast 20 distinct callsigns, including FIN2KK, FIN541, FIN6YP, FIN42T, FIN2MC.