Apparatus

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sensors Mode-S transponder

4631CC

ICAO 24-bit transponder address · allocated to Finland

Currently assigned to OH-SWI · CESSNA 525A Citation CJ2

Hex
4631CC
Octal
21430714
Decimal
4,600,268
Country
FI
Tail
OH-SWI
Type
C25A
No current signal · last broadcast 23h ago
Flights observed
126
Distinct callsigns
3
Country
FI
Last broadcast
23h ago

Last known position

Most recent position reported by Mode-S 4631CC.

Country allocation

The ICAO 24-bit address 4631CC 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 3 distinct

Callsign Airline Flights Last seen
ABF1 - 117 2026-07-17
OHSWI - 8 2026-07-09
ABF1A - 1 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 ABF1 HEL → HEL Jul 17, 04:59 UTCJul 17, 07:05 UTC2h 5m
2026-07-16 ABF1 HEL → HEL Jul 16, 05:25 UTCJul 16, 08:15 UTC2h 50m
2026-07-15 ABF1 - Jul 15, 07:35 UTCJul 15, 08:25 UTC50m
2026-07-15 ABF1 - Jul 15, 06:25 UTCJul 15, 07:00 UTC35m
2026-07-15 ABF1 - Jul 15, 05:00 UTCJul 15, 05:20 UTC20m
2026-07-14 ABF1 HEL → HEL Jul 14, 05:10 UTCJul 14, 08:00 UTC2h 50m
2026-07-09 OHSWI - Jul 9, 14:15 UTCJul 9, 14:35 UTC20m
2026-07-09 ABF1 NCL → TLL Jul 9, 11:05 UTCJul 9, 13:35 UTC2h 30m
2026-07-07 ABF1 - Jul 7, 17:25 UTCJul 7, 19:25 UTC2h 0m
2026-07-07 ABF1 TLL → GVA Jul 7, 07:40 UTCJul 7, 10:40 UTC3h 0m
2026-07-07 OHSWI HEL → TLL Jul 7, 05:45 UTCJul 7, 06:05 UTC20m
2026-07-05 ABF1 - Jul 5, 12:00 UTCJul 5, 13:05 UTC1h 5m
2026-07-05 ABF1 - Jul 5, 07:20 UTCJul 5, 08:15 UTC55m
2026-07-03 ABF1 - Jul 3, 13:05 UTCJul 3, 15:40 UTC2h 35m
2026-07-03 ABF1 HEL → LUX Jul 3, 07:50 UTCJul 3, 10:30 UTC2h 40m
2026-07-01 ABF1 - Jul 1, 19:20 UTCJul 1, 21:25 UTC2h 5m
2026-07-01 ABF1 - Jul 1, 15:40 UTCJul 1, 18:20 UTC2h 40m
2026-07-01 ABF1 - Jul 1, 06:45 UTCJul 1, 11:30 UTC4h 45m
2026-06-30 ABF1 - Jun 30, 11:55 UTCJun 30, 12:35 UTC40m
2026-06-30 ABF1 - Jun 30, 06:15 UTCJun 30, 06:50 UTC35m
2026-06-29 ABF1 - Jun 29, 08:09 UTCJun 29, 10:20 UTC2h 10m
2026-06-28 ABF1 HEL → NRN Jun 28, 09:45 UTCJun 28, 12:15 UTC2h 30m
2026-06-26 ABF1 RTM → HEL Jun 26, 13:10 UTCJun 26, 15:29 UTC2h 20m
2026-06-26 ABF1 LIS → RTM Jun 26, 09:50 UTCJun 26, 12:24 UTC2h 35m
2026-06-25 ABF1 - Jun 25, 16:05 UTCJun 25, 18:59 UTC2h 55m
2026-06-25 ABF1 HEL → RTM Jun 25, 11:04 UTCJun 25, 13:35 UTC2h 30m
2026-06-23 ABF1 - Jun 23, 14:10 UTCJun 23, 14:59 UTC50m
2026-06-23 ABF1 - Jun 23, 10:29 UTCJun 23, 12:29 UTC2h 0m
2026-06-23 ABF1 - Jun 23, 05:59 UTCJun 23, 07:29 UTC1h 30m
2026-06-21 ABF1 - Jun 21, 07:09 UTCJun 21, 08:25 UTC1h 15m
2026-06-19 ABF1 - Jun 19, 06:35 UTCJun 19, 07:25 UTC50m
2026-06-18 ABF1A - Jun 18, 19:35 UTCJun 18, 20:15 UTC40m
2026-06-18 ABF1 - Jun 18, 18:15 UTCJun 18, 19:05 UTC50m
2026-06-17 ABF1 - Jun 17, 23:45 UTCJun 18, 00:10 UTC25m
2026-06-17 ABF1 - Jun 17, 17:40 UTCJun 17, 18:05 UTC25m
2026-06-16 ABF1 - Jun 16, 18:39 UTCJun 16, 20:15 UTC1h 36m
2026-06-16 ABF1 - Jun 16, 14:05 UTCJun 16, 16:55 UTC2h 50m
2026-06-15 ABF1 - Jun 15, 09:25 UTCJun 15, 12:10 UTC2h 45m
2026-06-15 ABF1 HEL → WAW Jun 15, 06:20 UTCJun 15, 08:00 UTC1h 40m
2026-06-14 OHSWI - Jun 14, 09:50 UTCJun 14, 10:10 UTC20m
2026-06-14 OHSWI - Jun 14, 09:05 UTCJun 14, 09:35 UTC30m
2026-06-13 OHSWI - Jun 13, 11:50 UTCJun 13, 12:20 UTC30m
2026-06-13 OHSWI HEL → TMP Jun 13, 10:35 UTCJun 13, 11:00 UTC25m
2026-06-12 ABF1 - Jun 12, 13:10 UTCJun 12, 14:25 UTC1h 15m
2026-06-12 ABF1 HEL → OUL Jun 12, 07:00 UTCJun 12, 07:50 UTC50m
2026-06-11 ABF1 HEL → HEL Jun 11, 05:10 UTCJun 11, 07:25 UTC2h 15m
2026-06-06 ABF1 - Jun 6, 22:55 UTCJun 6, 23:35 UTC40m
2026-06-06 ABF1 HEL → KUO Jun 6, 19:44 UTCJun 6, 20:19 UTC35m
2026-06-05 ABF1 - Jun 5, 12:40 UTCJun 5, 14:25 UTC1h 45m
2026-06-05 ABF1 HEL → HAM Jun 5, 09:30 UTCJun 5, 11:25 UTC1h 55m

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

Mode-S 4631CC frequently asked

What is Mode-S code 4631CC?
4631CC is an ICAO 24-bit transponder address. Allocated to Finland. Assigned to OH-SWI.
Where is Mode-S 4631CC registered?
Mode-S code 4631CC is allocated to Finland (FI). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4631CC broadcasting right now?
No active broadcast right now. Last signal was 23h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4631CC, octal 21430714, decimal 4,600,268.
What flights does 4631CC operate?
Mode-S 4631CC has broadcast 3 distinct callsigns, including ABF1, OHSWI, ABF1A.