Apparatus

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sensors Mode-S transponder

4601F7

ICAO 24-bit transponder address · allocated to Finland

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

Hex
4601F7
Octal
21400767
Decimal
4,588,023
Country
FI
Tail
OH-ATJ
Type
AT75
No current signal · last broadcast 6d ago
Flights observed
633
Distinct callsigns
20
Country
FI
Last broadcast
6d ago

Last known position

Most recent position reported by Mode-S 4601F7.

Country allocation

The ICAO 24-bit address 4601F7 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
FIN23P - 12 2026-07-13
FIN1079 - 12 2026-07-13
FIN9VM - 11 2026-07-02
FIN6PH Finnair 11 2026-07-24
FIN4D Finnair 11 2026-07-24
FIN1KH - 11 2026-07-02
FIN541 - 10 2026-06-29
FIN2KK - 10 2026-06-29
FIN8G - 9 2026-07-14
FIN89W - 9 2026-07-21
FIN7EN - 9 2026-07-14
FIN5RG Finnair 9 2026-07-26
FIN5NB Finnair 9 2026-07-23
FIN489 Finnair 9 2026-07-23
FIN1RE - 9 2026-07-21
FIN1LT Finnair 9 2026-07-26
FIN1KE - 9 2026-07-02
FIN8KH - 8 2026-06-13
FIN7BT - 8 2026-07-12
FIN6WR Finnair 8 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FIN13B RIX → HEL Jul 26, 19:20 UTCJul 26, 20:20 UTC1h 0m
2026-07-26 FIN1077 HEL → RIX Jul 26, 17:50 UTCJul 26, 18:45 UTC55m
2026-07-26 FIN2MC RIX → HEL Jul 26, 15:50 UTCJul 26, 16:50 UTC1h 0m
2026-07-26 FIN6WR HEL → RIX Jul 26, 14:00 UTCJul 26, 15:05 UTC1h 5m
2026-07-26 FIN1LT TLL → HEL Jul 26, 12:50 UTCJul 26, 13:10 UTC20m
2026-07-26 FIN5RG HEL → TLL Jul 26, 11:55 UTCJul 26, 12:15 UTC20m
2026-07-25 FIN934 MAN → HEL Jul 25, 16:20 UTCJul 25, 18:25 UTC2h 5m
2026-07-25 FIN933 - Jul 25, 13:30 UTCJul 25, 15:40 UTC2h 10m
2026-07-25 FIN8TQ JOE → HEL Jul 25, 11:25 UTCJul 25, 12:20 UTC55m
2026-07-25 FIN4J HEL → MUC Jul 25, 09:55 UTCJul 25, 10:40 UTC45m
2026-07-25 FIN2EZ GDN → HEL Jul 25, 08:10 UTCJul 25, 09:15 UTC1h 5m
2026-07-25 FIN2EZ GDN → HEL Jul 25, 07:20 UTCJul 25, 07:35 UTC15m
2026-07-25 FIN1175 HEL → GDN Jul 25, 04:30 UTCJul 25, 06:10 UTC1h 40m
2026-07-24 FIN7NP GDN → HEL Jul 24, 21:15 UTCJul 24, 22:05 UTC50m
2026-07-24 FIN7NP GDN → HEL Jul 24, 20:10 UTCJul 24, 20:30 UTC20m
2026-07-24 FIN5UT HEL → GDN Jul 24, 17:30 UTCJul 24, 19:25 UTC1h 55m
2026-07-24 FIN6YP - Jul 24, 16:00 UTCJul 24, 16:45 UTC45m
2026-07-24 FIN42T - Jul 24, 14:45 UTCJul 24, 15:30 UTC45m
2026-07-24 FIN1044 URE → HEL Jul 24, 12:20 UTCJul 24, 13:10 UTC50m
2026-07-24 FIN5YF HEL → URE Jul 24, 11:00 UTCJul 24, 11:35 UTC35m
2026-07-24 FIN9T TLL → HEL Jul 24, 09:50 UTCJul 24, 10:15 UTC25m
2026-07-24 FIN7DE HEL → TLL Jul 24, 09:00 UTCJul 24, 09:20 UTC20m
2026-07-24 FIN6PH HEL → VNO Jul 24, 08:00 UTCJul 24, 08:20 UTC20m
2026-07-24 FIN4D HEL → TLL Jul 24, 07:10 UTCJul 24, 07:30 UTC20m
2026-07-24 FIN6NC HEL → HEL Jul 24, 04:10 UTCJul 24, 05:55 UTC1h 45m
2026-07-24 FIN4QA HEL → AMS Jul 24, 02:30 UTCJul 24, 03:15 UTC45m
2026-07-23 FIN3PT HEL → KUO Jul 23, 22:05 UTCJul 23, 22:55 UTC50m
2026-07-23 FIN9EJ VNO → HEL Jul 23, 19:25 UTCJul 23, 20:35 UTC1h 10m
2026-07-23 FIN1PL - Jul 23, 17:10 UTCJul 23, 18:30 UTC1h 20m
2026-07-23 FIN2MC - Jul 23, 15:25 UTCJul 23, 16:25 UTC1h 0m
2026-07-23 FIN6WR - Jul 23, 13:40 UTCJul 23, 14:45 UTC1h 5m
2026-07-23 FIN5NB KAO → HEL Jul 23, 08:20 UTCJul 23, 09:20 UTC1h 0m
2026-07-23 FIN489 HEL → KAO Jul 23, 05:50 UTCJul 23, 07:00 UTC1h 10m
2026-07-22 FIN9EJ VNO → HEL Jul 22, 18:50 UTCJul 22, 20:05 UTC1h 15m
2026-07-22 FIN1PL HEL → VNO Jul 22, 16:35 UTCJul 22, 17:55 UTC1h 20m
2026-07-22 FIN6YP - Jul 22, 13:30 UTCJul 22, 15:35 UTC2h 5m
2026-07-21 FIN89W - Jul 21, 15:35 UTCJul 21, 17:05 UTC1h 30m
2026-07-21 FIN1RE - Jul 21, 13:30 UTCJul 21, 14:55 UTC1h 25m
2026-07-21 FIN5NB - Jul 21, 11:20 UTCJul 21, 12:30 UTC1h 10m
2026-07-21 FIN489 - Jul 21, 08:40 UTCJul 21, 09:50 UTC1h 10m
2026-07-21 FCM3M - Jul 21, 07:05 UTCJul 21, 07:25 UTC20m
2026-07-21 FCM3M - Jul 21, 04:05 UTCJul 21, 04:25 UTC20m
2026-07-20 FIN7RC GOT → HEL Jul 20, 19:25 UTCJul 20, 21:15 UTC1h 50m
2026-07-20 FIN6HA HEL → GOT Jul 20, 16:55 UTCJul 20, 18:45 UTC1h 50m
2026-07-20 FIN2MC - Jul 20, 15:05 UTCJul 20, 16:00 UTC55m
2026-07-20 FIN6WR HEL → RIX Jul 20, 13:20 UTCJul 20, 14:20 UTC1h 0m
2026-07-20 FIN4W - Jul 20, 10:35 UTCJul 20, 12:05 UTC1h 30m
2026-07-20 FIN80U HEL → VNO Jul 20, 08:25 UTCJul 20, 09:55 UTC1h 30m
2026-07-19 FIN7KE - Jul 19, 19:15 UTCJul 19, 19:55 UTC40m
2026-07-19 FIN6KC - Jul 19, 17:55 UTCJul 19, 18:40 UTC45m

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

Mode-S 4601F7 frequently asked

What is Mode-S code 4601F7?
4601F7 is an ICAO 24-bit transponder address. Allocated to Finland. Assigned to OH-ATJ.
Where is Mode-S 4601F7 registered?
Mode-S code 4601F7 is allocated to Finland (FI). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4601F7 broadcasting right now?
No active broadcast right now. Last signal was 6d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4601F7, octal 21400767, decimal 4,588,023.
What flights does 4601F7 operate?
Mode-S 4601F7 has broadcast 20 distinct callsigns, including FIN23P, FIN1079, FIN9VM, FIN6PH, FIN4D.