Apparatus

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sensors Mode-S transponder

4ACA63

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RSC · AIRBUS A-350-900

Hex
4ACA63
Octal
22545143
Decimal
4,901,475
Country
SE
Tail
SE-RSC
Type
A359
No current signal · last broadcast 7h ago
Flights observed
69
Distinct callsigns
13
Country
SE
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 4ACA63.

Country allocation

The ICAO 24-bit address 4ACA63 falls within the block assigned to Sweden (SE) by ICAO Annex 10, Volume III. Every aircraft registered in Sweden 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 13 distinct

Callsign Airline Flights Last seen
SAS936 Scandinavian Airlines System 10 2026-05-27
SAS935 Scandinavian Airlines System 9 2026-05-26
SAS925 Scandinavian Airlines System 9 2026-05-27
SAS984 Scandinavian Airlines System 8 2026-05-29
SAS983 Scandinavian Airlines System 8 2026-05-28
SAS926 Scandinavian Airlines System 8 2026-05-28
SAS987 Scandinavian Airlines System 7 2026-05-18
SAS988 Scandinavian Airlines System 5 2026-05-18
SERSC - 1 2026-04-28
SAS944 Scandinavian Airlines System 1 2026-05-24
SAS943 Scandinavian Airlines System 1 2026-05-23
SAS9136 Scandinavian Airlines System 1 2026-05-16
SAS9135 Scandinavian Airlines System 1 2026-04-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SAS984 HND → CPH May 29, 03:35 UTCMay 29, 16:15 UTC12h 40m
2026-05-28 SAS983 CPH → NRT May 28, 11:20 UTCMay 28, 23:10 UTC11h 50m
2026-05-28 SAS926 IAD → CPH May 28, 01:35 UTCMay 28, 08:45 UTC7h 10m
2026-05-27 SAS925 CPH → IAD May 27, 13:05 UTCMay 27, 21:35 UTC8h 30m
2026-05-27 SAS936 SFO → CPH May 27, 00:49 UTCMay 27, 10:30 UTC9h 41m
2026-05-26 SAS935 CPH → SFO May 26, 11:20 UTCMay 26, 21:55 UTC10h 35m
2026-05-26 SAS926 IAD → CPH May 26, 00:39 UTCMay 26, 07:45 UTC7h 5m
2026-05-25 SAS925 CPH → IAD May 25, 12:50 UTCMay 25, 21:04 UTC8h 14m
2026-05-25 SAS936 SFO → CPH May 25, 01:55 UTCMay 25, 10:10 UTC8h 15m
2026-05-24 SAS935 CPH → SFO May 24, 11:20 UTCMay 24, 21:51 UTC10h 31m
2026-05-24 SAS944 ORD → CPH May 24, 01:15 UTCMay 24, 08:40 UTC7h 25m
2026-05-23 SAS943 CPH → ORD May 23, 12:40 UTCMay 23, 20:55 UTC8h 15m
2026-05-22 SAS936 SFO → CPH May 22, 00:25 UTCMay 22, 10:25 UTC10h 0m
2026-05-21 SAS935 CPH → SFO May 21, 11:30 UTCMay 21, 21:45 UTC10h 15m
2026-05-21 SAS926 IAD → CPH May 21, 01:25 UTCMay 21, 08:30 UTC7h 5m
2026-05-20 SAS925 CPH → IAD May 20, 13:10 UTCMay 20, 21:35 UTC8h 25m
2026-05-20 SAS936 SFO → CPH May 20, 00:50 UTCMay 20, 10:45 UTC9h 56m
2026-05-19 SAS935 CPH → SFO May 19, 11:00 UTCMay 19, 20:55 UTC9h 55m
2026-05-18 SAS988 ICN → CPH May 18, 16:00 UTCMay 19, 03:20 UTC11h 19m
2026-05-18 SAS988 ICN → CPH May 18, 14:45 UTCMay 18, 15:10 UTC25m
2026-05-18 SAS987 CPH → ICN May 18, 10:10 UTCMay 18, 10:25 UTC15m
2026-05-17 SAS987 CPH → ICN May 17, 23:25 UTCMay 18, 09:20 UTC9h 55m
2026-05-16 SAS9136 MLA → CPH May 16, 17:30 UTCMay 16, 20:20 UTC2h 50m
2026-04-28 SERSC MLA → MLA Apr 28, 08:25 UTCApr 28, 11:05 UTC2h 40m
2026-04-26 SAS9135 ARN → MAD Apr 26, 11:45 UTCApr 26, 14:30 UTC2h 45m
2026-04-26 SAS936 SFO → CPH Apr 26, 00:10 UTCApr 26, 09:50 UTC9h 40m
2026-04-25 SAS935 CPH → SFO Apr 25, 11:05 UTCApr 25, 21:40 UTC10h 35m
2026-04-25 SAS926 IAD → CPH Apr 25, 00:25 UTCApr 25, 08:00 UTC7h 35m
2026-04-24 SAS925 CPH → IAD Apr 24, 12:45 UTCApr 24, 20:55 UTC8h 10m
2026-04-24 SAS936 SFO → CPH Apr 24, 00:05 UTCApr 24, 09:40 UTC9h 35m
2026-04-23 SAS935 CPH → SFO Apr 23, 11:01 UTCApr 23, 21:35 UTC10h 34m
2026-04-22 SAS984 HND → CPH Apr 22, 02:35 UTCApr 22, 15:30 UTC12h 55m
2026-04-21 SAS983 CPH → NRT Apr 21, 11:05 UTCApr 21, 23:20 UTC12h 15m
2026-04-20 SAS988 ICN → CPH Apr 20, 14:50 UTCApr 21, 03:55 UTC13h 5m
2026-04-20 SAS987 CPH → ICN Apr 20, 08:50 UTCApr 20, 09:05 UTC15m
2026-04-19 SAS987 CPH → ICN Apr 19, 22:10 UTCApr 20, 08:00 UTC9h 50m
2026-04-19 SAS984 HND → CPH Apr 19, 02:45 UTCApr 19, 16:00 UTC13h 15m
2026-04-18 SAS983 CPH → NRT Apr 18, 11:40 UTCApr 18, 23:55 UTC12h 15m
2026-04-18 SAS926 IAD → CPH Apr 18, 07:25 UTCApr 18, 07:55 UTC30m
2026-04-18 SAS926 IAD → CPH Apr 18, 06:25 UTCApr 18, 07:20 UTC55m
2026-04-18 SAS926 IAD → CPH Apr 18, 01:25 UTCApr 18, 02:40 UTC1h 15m
2026-04-18 SAS926 IAD → CPH Apr 18, 00:40 UTCApr 18, 01:20 UTC40m
2026-04-17 SAS925 CPH → IAD Apr 17, 19:25 UTCApr 17, 20:50 UTC1h 25m
2026-04-17 SAS925 CPH → IAD Apr 17, 19:10 UTCApr 17, 19:20 UTC10m
2026-04-17 SAS925 CPH → IAD Apr 17, 15:20 UTCApr 17, 15:35 UTC15m
2026-04-17 SAS925 CPH → IAD Apr 17, 13:20 UTCApr 17, 15:15 UTC1h 54m
2026-04-17 SAS925 CPH → IAD Apr 17, 12:50 UTCApr 17, 13:15 UTC25m
2026-04-17 SAS936 SFO → CPH Apr 17, 09:20 UTCApr 17, 10:10 UTC50m
2026-04-17 SAS936 SFO → CPH Apr 17, 07:20 UTCApr 17, 09:10 UTC1h 50m
2026-04-17 SAS936 SFO → CPH Apr 17, 01:20 UTCApr 17, 03:15 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 SE-RSC page for operator, model, and routing details .

Mode-S 4ACA63 frequently asked

What is Mode-S code 4ACA63?
4ACA63 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RSC.
Where is Mode-S 4ACA63 registered?
Mode-S code 4ACA63 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACA63 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACA63, octal 22545143, decimal 4,901,475.
What flights does 4ACA63 operate?
Mode-S 4ACA63 has broadcast 13 distinct callsigns, including SAS936, SAS935, SAS925, SAS984, SAS983.