Apparatus

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sensors Mode-S transponder

4601F4

ICAO 24-bit transponder address · allocated to Finland

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

Hex
4601F4
Octal
21400764
Decimal
4,588,020
Country
FI
Tail
OH-ATG
Type
AT75
Broadcasting now · callsign FIN949 · 16,000 ft
Flights observed
690
Distinct callsigns
20
Country
FI
Last broadcast
2h ago

Current position

4601F4 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4601F4 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
FIN541 - 19 2026-07-07
FIN4W - 15 2026-07-12
FIN80U - 14 2026-07-12
FIN2KK - 14 2026-07-07
FIN89W - 13 2026-07-04
FIN1RE - 12 2026-07-04
FIN7EN - 10 2026-07-12
FIN2MC - 10 2026-07-09
FIN9T - 9 2026-07-03
FIN9KH Finnair 9 2026-07-03
FIN8G - 9 2026-07-12
FIN7MR - 9 2026-07-14
FIN6WR - 9 2026-07-09
FIN6KB Finnair 9 2026-07-03
FIN58G - 9 2026-07-14
FIN3KC - 9 2026-07-14
FIN36J - 9 2026-07-08
FIN13B - 9 2026-07-09
FIN8NP - 8 2026-07-08
FIN7DE - 8 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FIN54C HEL → TLL Jul 14, 12:35 UTCJul 14, 12:50 UTC15m
2026-07-14 FIN26B - Jul 14, 10:50 UTCJul 14, 11:40 UTC50m
2026-07-14 FIN3KC - Jul 14, 09:25 UTCJul 14, 10:10 UTC45m
2026-07-14 FIN6PH - Jul 14, 08:10 UTCJul 14, 08:30 UTC20m
2026-07-14 FIN4D - Jul 14, 07:10 UTCJul 14, 07:30 UTC20m
2026-07-14 FIN58G - Jul 14, 05:35 UTCJul 14, 06:30 UTC55m
2026-07-14 FIN7MR HEL → RIX Jul 14, 03:55 UTCJul 14, 05:00 UTC1h 5m
2026-07-13 FIN934 - Jul 13, 18:40 UTCJul 13, 20:45 UTC2h 5m
2026-07-13 FIN933 HEL → BOO Jul 13, 15:40 UTCJul 13, 18:00 UTC2h 20m
2026-07-13 FIN7PH KEM → HEL Jul 13, 13:15 UTCJul 13, 14:30 UTC1h 15m
2026-07-13 FIN8Q - Jul 13, 11:10 UTCJul 13, 12:30 UTC1h 20m
2026-07-13 FIN5NB - Jul 13, 08:40 UTCJul 13, 09:45 UTC1h 5m
2026-07-13 FIN489 - Jul 13, 05:55 UTCJul 13, 07:10 UTC1h 15m
2026-07-12 FIN9EJ VNO → HEL Jul 12, 19:15 UTCJul 12, 20:45 UTC1h 30m
2026-07-12 FIN1PL HEL → VNO Jul 12, 17:10 UTCJul 12, 18:40 UTC1h 30m
2026-07-12 FIN8G - Jul 12, 15:30 UTCJul 12, 16:25 UTC55m
2026-07-12 FIN7EN - Jul 12, 13:55 UTCJul 12, 14:55 UTC1h 0m
2026-07-12 FIN4W - Jul 12, 11:10 UTCJul 12, 12:50 UTC1h 40m
2026-07-12 FIN80U HEL → VNO Jul 12, 08:45 UTCJul 12, 10:15 UTC1h 30m
2026-07-12 FIN5NB - Jul 12, 06:50 UTCJul 12, 08:01 UTC1h 10m
2026-07-12 FIN489 - Jul 12, 04:20 UTCJul 12, 05:30 UTC1h 10m
2026-07-11 FIN9EJ VNO → HEL Jul 11, 18:40 UTCJul 11, 20:25 UTC1h 45m
2026-07-11 FIN1PL HEL → VNO Jul 11, 16:25 UTCJul 11, 18:00 UTC1h 35m
2026-07-11 FIN6YP HEL → HEL Jul 11, 13:10 UTCJul 11, 15:20 UTC2h 10m
2026-07-11 FIN26B - Jul 11, 10:50 UTCJul 11, 11:50 UTC1h 0m
2026-07-11 FIN3KC HEL → KUO Jul 11, 09:25 UTCJul 11, 10:10 UTC45m
2026-07-11 FIN5X - Jul 11, 07:05 UTCJul 11, 08:30 UTC1h 25m
2026-07-11 FIN5PK - Jul 11, 04:10 UTCJul 11, 05:25 UTC1h 15m
2026-07-11 FIN9EP - Jul 11, 03:01 UTCJul 11, 03:20 UTC20m
2026-07-10 FIN5PH - Jul 10, 21:20 UTCJul 10, 21:40 UTC20m
2026-07-10 FIN5AZ - Jul 10, 20:20 UTCJul 10, 20:45 UTC25m
2026-07-10 FIN4EL HEL → TLL Jul 10, 19:30 UTCJul 10, 19:50 UTC20m
2026-07-10 FIN27H - Jul 10, 18:30 UTCJul 10, 18:50 UTC20m
2026-07-10 FIN5Y HEL → TLL Jul 10, 17:40 UTCJul 10, 18:00 UTC20m
2026-07-10 FIN8G - Jul 10, 15:45 UTCJul 10, 16:40 UTC55m
2026-07-10 FIN7EN - Jul 10, 14:15 UTCJul 10, 15:05 UTC50m
2026-07-10 FIN5NB - Jul 10, 12:25 UTCJul 10, 13:25 UTC1h 0m
2026-07-10 FIN489 - Jul 10, 10:00 UTCJul 10, 11:10 UTC1h 10m
2026-07-10 FIN602 - Jul 10, 07:50 UTCJul 10, 09:05 UTC1h 15m
2026-07-10 FIN2PC - Jul 10, 04:25 UTCJul 10, 05:35 UTC1h 10m
2026-07-09 FIN13B - Jul 9, 18:40 UTCJul 9, 19:35 UTC55m
2026-07-09 FIN1077 - Jul 9, 17:05 UTCJul 9, 18:05 UTC1h 0m
2026-07-09 FIN2MC - Jul 9, 15:00 UTCJul 9, 16:00 UTC1h 0m
2026-07-09 FIN6WR - Jul 9, 13:25 UTCJul 9, 14:25 UTC1h 0m
2026-07-09 FIN26B - Jul 9, 11:25 UTCJul 9, 12:25 UTC1h 0m
2026-07-09 FIN3KC HEL → KUO Jul 9, 09:55 UTCJul 9, 10:45 UTC50m
2026-07-09 FIN2XM VNO → HEL Jul 9, 07:00 UTCJul 9, 08:40 UTC1h 40m
2026-07-09 FIN3V - Jul 9, 04:45 UTCJul 9, 06:05 UTC1h 20m
2026-07-09 FIN322 - Jul 9, 02:50 UTCJul 9, 03:45 UTC55m
2026-07-08 FIN321 - Jul 8, 21:20 UTCJul 8, 22:10 UTC50m

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

Mode-S 4601F4 frequently asked

What is Mode-S code 4601F4?
4601F4 is an ICAO 24-bit transponder address. Allocated to Finland. Assigned to OH-ATG.
Where is Mode-S 4601F4 registered?
Mode-S code 4601F4 is allocated to Finland (FI). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4601F4 broadcasting right now?
Yes. Mode-S 4601F4 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4601F4, octal 21400764, decimal 4,588,020.
What flights does 4601F4 operate?
Mode-S 4601F4 has broadcast 20 distinct callsigns, including FIN541, FIN4W, FIN80U, FIN2KK, FIN89W.