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
Broadcasting now · callsign FIN1KE · 21,375 ft
Flights observed
797
Distinct callsigns
20
Country
FI
Last broadcast
Jul 24, 18:40 UTC

Current position

4601FA is currently broadcasting. Map zoomed to live position.

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 - 22 2026-07-21
FIN541 Finnair 20 2026-07-21
FIN6YP - 15 2026-07-06
FIN42T - 15 2026-07-06
FIN322 Finnair 14 2026-07-18
FIN2MC Finnair 14 2026-06-26
FIN6WR Finnair 13 2026-06-26
FIN4QA - 13 2026-07-04
FIN321 - 13 2026-07-17
FIN4EL - 12 2026-07-20
FIN3PT - 12 2026-07-03
FIN9EJ - 11 2026-07-17
FIN6PH - 11 2026-07-08
FIN54C - 11 2026-07-02
FIN4TA - 11 2026-07-02
FIN1PL - 11 2026-07-17
FIN80U - 10 2026-07-19
FIN7BT - 10 2026-07-18
FIN5CE - 10 2026-07-18
FIN5AZ Finnair 10 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 FIN8932 TLL → HEL Jul 24, 18:10 UTCJul 24, 18:30 UTC20m
2026-07-24 FIN5AT HEL → TLL Jul 24, 11:35 UTCJul 24, 11:55 UTC20m
2026-07-24 FIN88T BGO → HEL Jul 24, 07:00 UTCJul 24, 09:10 UTC2h 10m
2026-07-24 FIN30M HEL → BGO Jul 24, 03:45 UTCJul 24, 06:25 UTC2h 40m
2026-07-23 FIN13B RIX → HEL Jul 23, 19:30 UTCJul 23, 20:25 UTC55m
2026-07-23 FIN1077 HEL → RIX Jul 23, 17:55 UTCJul 23, 18:55 UTC1h 0m
2026-07-23 FIN89W - Jul 23, 15:40 UTCJul 23, 17:10 UTC1h 30m
2026-07-23 FIN1RE - Jul 23, 13:35 UTCJul 23, 15:00 UTC1h 25m
2026-07-23 FIN2EZ GDN → HEL Jul 23, 10:10 UTCJul 23, 12:10 UTC2h 0m
2026-07-23 FIN1175 HEL → GDN Jul 23, 07:20 UTCJul 23, 08:55 UTC1h 35m
2026-07-23 FIN434 OUL → HEL Jul 23, 05:15 UTCJul 23, 06:20 UTC1h 5m
2026-07-23 FIN4PV HEL → OUL Jul 23, 03:30 UTCJul 23, 04:40 UTC1h 10m
2026-07-22 FIN7PJ - Jul 22, 17:10 UTCJul 22, 19:20 UTC2h 10m
2026-07-22 FIN4DU - Jul 22, 13:50 UTCJul 22, 16:05 UTC2h 15m
2026-07-22 FIN36J - Jul 22, 12:00 UTCJul 22, 12:35 UTC35m
2026-07-22 FIN8NP HEL → TAY Jul 22, 11:10 UTCJul 22, 11:25 UTC15m
2026-07-22 FIN931 HEL → BOO Jul 22, 04:15 UTCJul 22, 05:25 UTC1h 10m
2026-07-21 FIN594 - Jul 21, 18:20 UTCJul 21, 19:35 UTC1h 15m
2026-07-21 FIN594 - Jul 21, 17:00 UTCJul 21, 17:15 UTC15m
2026-07-21 FIN593 HEL → KTT Jul 21, 15:25 UTCJul 21, 15:45 UTC20m
2026-07-21 FIN593 HEL → KTT Jul 21, 13:00 UTCJul 21, 14:20 UTC1h 20m
2026-07-21 FIN2KK - Jul 21, 10:05 UTCJul 21, 11:30 UTC1h 25m
2026-07-21 FIN2KK - Jul 21, 08:25 UTCJul 21, 09:10 UTC45m
2026-07-21 FIN541 HEL → RVN Jul 21, 06:35 UTCJul 21, 07:20 UTC45m
2026-07-21 FIN541 HEL → RVN Jul 21, 04:20 UTCJul 21, 05:35 UTC1h 15m
2026-07-20 FIN5AZ TLL → HEL Jul 20, 20:45 UTCJul 20, 21:10 UTC25m
2026-07-20 FIN4EL HEL → TLL Jul 20, 20:00 UTCJul 20, 20:20 UTC20m
2026-07-20 FIN27H TLL → HEL Jul 20, 18:50 UTCJul 20, 19:10 UTC20m
2026-07-20 FIN89W - Jul 20, 15:40 UTCJul 20, 17:10 UTC1h 30m
2026-07-20 FIN1RE - Jul 20, 13:20 UTCJul 20, 14:50 UTC1h 30m
2026-07-20 FIN592 KTT → HEL Jul 20, 10:25 UTCJul 20, 11:40 UTC1h 15m
2026-07-20 FIN592 KTT → HEL Jul 20, 08:55 UTCJul 20, 09:10 UTC15m
2026-07-20 FIN4PK HEL → IVL Jul 20, 07:20 UTCJul 20, 07:40 UTC20m
2026-07-20 FIN4PK HEL → IVL Jul 20, 04:55 UTCJul 20, 06:05 UTC1h 10m
2026-07-19 FIN7NP GDN → HEL Jul 19, 20:00 UTCJul 19, 20:55 UTC55m
2026-07-19 FIN7NP GDN → HEL Jul 19, 19:05 UTCJul 19, 19:20 UTC15m
2026-07-19 FIN5UT - Jul 19, 16:15 UTCJul 19, 18:30 UTC2h 15m
2026-07-19 FIN3ZP - Jul 19, 14:35 UTCJul 19, 15:25 UTC50m
2026-07-19 FIN1TJ - Jul 19, 13:10 UTCJul 19, 13:50 UTC40m
2026-07-19 FIN4W - Jul 19, 11:50 UTCJul 19, 12:10 UTC20m
2026-07-19 FIN80U - Jul 19, 08:25 UTCJul 19, 09:55 UTC1h 30m
2026-07-19 FIN5NB - Jul 19, 06:30 UTCJul 19, 07:40 UTC1h 10m
2026-07-19 FIN489 - Jul 19, 04:05 UTCJul 19, 05:10 UTC1h 5m
2026-07-18 FIN5AZ - Jul 18, 20:30 UTCJul 18, 20:55 UTC25m
2026-07-18 FIN4EL HEL → TLL Jul 18, 19:35 UTCJul 18, 20:00 UTC25m
2026-07-18 FIN7BT - Jul 18, 17:10 UTCJul 18, 18:20 UTC1h 10m
2026-07-18 FIN5CE - Jul 18, 15:20 UTCJul 18, 16:30 UTC1h 10m
2026-07-18 FIN7KE - Jul 18, 14:00 UTCJul 18, 14:40 UTC40m
2026-07-18 FIN6KC - Jul 18, 12:45 UTCJul 18, 13:20 UTC35m
2026-07-18 FIN26B HEL → HEL Jul 18, 09:40 UTCJul 18, 11:55 UTC2h 15m

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?
Yes. Mode-S 4601FA is currently airborne.
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, FIN322.