Apparatus

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sensors Mode-S transponder

461E21

ICAO 24-bit transponder address · allocated to Finland

Currently assigned to OH-LKR · EMBRAER ERJ-190-100

Hex
461E21
Octal
21417041
Decimal
4,595,233
Country
FI
Tail
OH-LKR
Type
E190
Broadcasting now · callsign FIN7PR · 37,000 ft
Flights observed
571
Distinct callsigns
20
Country
FI
Last broadcast
2h ago

Current position

461E21 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 461E21 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
FIN8PL - 12 2026-07-05
FIN50F - 12 2026-07-04
FIN1143 - 11 2026-07-01
FIN8ZR - 9 2026-06-26
FIN8BX - 9 2026-07-01
FIN8AL - 9 2026-06-26
FIN7WB Finnair 9 2026-06-01
FIN5KA - 9 2026-07-13
FIN2KE - 9 2026-07-13
FIN2JA Finnair 9 2026-06-01
FIN9LK - 8 2026-07-04
FIN91Z - 8 2026-07-05
FIN863 - 8 2026-07-05
FIN69V - 8 2026-07-13
FIN4NR - 8 2026-07-04
FIN26J - 8 2026-07-13
FIN9DZ - 6 2026-06-20
FIN9CE - 6 2026-07-11
FIN7BV Finnair 6 2026-06-15
FIN78Y - 6 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 FIN9KC HEL → PRG Jul 15, 04:00 UTCJul 15, 05:45 UTC1h 45m
2026-07-14 FIN8DN - Jul 14, 18:10 UTCJul 14, 19:50 UTC1h 40m
2026-07-14 FIN33A HEL → BER Jul 14, 15:20 UTCJul 14, 17:05 UTC1h 45m
2026-07-14 FIN1AC - Jul 14, 12:40 UTCJul 14, 14:15 UTC1h 35m
2026-07-14 FIN8TE HEL → BLL Jul 14, 10:25 UTCJul 14, 11:55 UTC1h 30m
2026-07-14 FIN8SM - Jul 14, 07:30 UTCJul 14, 09:30 UTC2h 0m
2026-07-14 FIN2KD HEL → DUS Jul 14, 04:00 UTCJul 14, 06:05 UTC2h 5m
2026-07-13 FIN2KE - Jul 13, 16:30 UTCJul 13, 18:05 UTC1h 35m
2026-07-13 FIN5KA HEL → HAM Jul 13, 13:45 UTCJul 13, 15:30 UTC1h 45m
2026-07-13 FIN69V - Jul 13, 10:50 UTCJul 13, 12:25 UTC1h 35m
2026-07-13 FIN26J HEL → HAM Jul 13, 08:01 UTCJul 13, 09:45 UTC1h 45m
2026-07-13 FIN5RY ARN → HEL Jul 13, 06:30 UTCJul 13, 07:10 UTC40m
2026-07-13 FIN1TC HEL → ARN Jul 13, 04:45 UTCJul 13, 05:31 UTC45m
2026-07-12 FIN5UP - Jul 12, 19:45 UTCJul 12, 21:10 UTC1h 25m
2026-07-12 FIN1147 - Jul 12, 17:25 UTCJul 12, 18:45 UTC1h 20m
2026-07-12 FIN9XG - Jul 12, 15:35 UTCJul 12, 16:25 UTC50m
2026-07-12 FIN9PE - Jul 12, 13:40 UTCJul 12, 14:30 UTC50m
2026-07-12 FIN9ML FRA → HEL Jul 12, 10:01 UTCJul 12, 12:05 UTC2h 5m
2026-07-12 FIN1AB HEL → FRA Jul 12, 04:50 UTCJul 12, 07:05 UTC2h 15m
2026-07-11 FIN78Y - Jul 11, 19:50 UTCJul 11, 21:00 UTC1h 10m
2026-07-11 FIN18N HEL → OSL Jul 11, 16:50 UTCJul 11, 18:00 UTC1h 10m
2026-07-11 FIN1AJ BUD → HEL Jul 11, 13:25 UTCJul 11, 15:55 UTC2h 30m
2026-07-11 FIN9CE HEL → CDG Jul 11, 09:40 UTCJul 11, 12:10 UTC2h 30m
2026-07-11 FIN59P - Jul 11, 07:10 UTCJul 11, 08:40 UTC1h 30m
2026-07-11 FIN1HF - Jul 11, 04:50 UTCJul 11, 06:15 UTC1h 25m
2026-07-10 FIN78Y - Jul 10, 18:55 UTCJul 10, 20:05 UTC1h 10m
2026-07-10 FIN18N HEL → OSL Jul 10, 16:30 UTCJul 10, 17:35 UTC1h 5m
2026-07-10 FIN5YR OUL → HEL Jul 10, 14:50 UTCJul 10, 15:40 UTC50m
2026-07-10 FIN4CL HEL → OUL Jul 10, 13:20 UTCJul 10, 14:10 UTC50m
2026-07-10 FIN7YC - Jul 10, 09:25 UTCJul 10, 11:30 UTC2h 5m
2026-07-10 FIN1393 HEL → DUS Jul 10, 06:15 UTCJul 10, 08:15 UTC2h 0m
2026-07-09 FCM1M HEL → HEL Jul 9, 09:45 UTCJul 9, 14:20 UTC4h 35m
2026-07-09 FIN6HL BUD → HEL Jul 9, 06:05 UTCJul 9, 08:15 UTC2h 10m
2026-07-09 FIN5DM HEL → BUD Jul 9, 03:05 UTCJul 9, 05:00 UTC1h 55m
2026-07-08 FIN4XD ARN → HEL Jul 8, 19:10 UTCJul 8, 19:55 UTC45m
2026-07-08 FIN5LA HEL → ARN Jul 8, 17:30 UTCJul 8, 18:15 UTC45m
2026-07-08 FIN98L - Jul 8, 15:00 UTCJul 8, 16:25 UTC1h 25m
2026-07-08 FIN4KF HEL → CPH Jul 8, 12:45 UTCJul 8, 14:15 UTC1h 30m
2026-07-08 FIN7YC - Jul 8, 09:30 UTCJul 8, 11:40 UTC2h 10m
2026-07-08 FIN1393 HEL → DUS Jul 8, 06:20 UTCJul 8, 08:15 UTC1h 55m
2026-07-08 FIN1G ARN → HEL Jul 8, 04:30 UTCJul 8, 05:25 UTC55m
2026-07-07 FIN40T HEL → ARN Jul 7, 21:20 UTCJul 7, 22:05 UTC45m
2026-07-07 FIN1LP FRA → HEL Jul 7, 17:55 UTCJul 7, 20:00 UTC2h 5m
2026-07-07 FIN2K HEL → FRA Jul 7, 14:20 UTCJul 7, 16:30 UTC2h 10m
2026-07-07 FIN75D DBV → HEL Jul 7, 08:30 UTCJul 7, 11:20 UTC2h 50m
2026-07-07 FIN1KY HEL → DBV Jul 7, 04:40 UTCJul 7, 07:15 UTC2h 35m
2026-07-07 FIN8MC - Jul 7, 02:40 UTCJul 7, 03:35 UTC55m
2026-07-06 FIN4B - Jul 6, 21:35 UTCJul 6, 22:25 UTC50m
2026-07-06 FIN7RC - Jul 6, 18:55 UTCJul 6, 20:05 UTC1h 10m
2026-07-06 FIN6HA HEL → GOT Jul 6, 16:55 UTCJul 6, 18:05 UTC1h 10m

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

Mode-S 461E21 frequently asked

What is Mode-S code 461E21?
461E21 is an ICAO 24-bit transponder address. Allocated to Finland. Assigned to OH-LKR.
Where is Mode-S 461E21 registered?
Mode-S code 461E21 is allocated to Finland (FI). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 461E21 broadcasting right now?
Yes. Mode-S 461E21 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 461E21, octal 21417041, decimal 4,595,233.
What flights does 461E21 operate?
Mode-S 461E21 has broadcast 20 distinct callsigns, including FIN8PL, FIN50F, FIN1143, FIN8ZR, FIN8BX.