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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
Broadcasting now · callsign SAS926 · 41,000 ft
Flights observed
172
Distinct callsigns
17
Country
SE
Last broadcast
Jul 26, 07:40 UTC

Current position

4ACA63 is currently broadcasting. Map zoomed to live position.

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 17 distinct

Callsign Airline Flights Last seen
SAS987 Scandinavian Airlines System 20 2026-07-21
SAS936 Scandinavian Airlines System 20 2026-07-25
SAS935 Scandinavian Airlines System 19 2026-07-24
SAS926 Scandinavian Airlines System 17 2026-07-26
SAS925 Scandinavian Airlines System 17 2026-07-25
SAS984 - 15 2026-07-21
SAS983 - 15 2026-07-20
SAS988 Scandinavian Airlines System 14 2026-07-22
SAS930 Scandinavian Airlines System 9 2026-07-23
SAS929 Scandinavian Airlines System 9 2026-07-23
SAS938 - 6 2026-06-21
SAS937 - 6 2026-06-21
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
2026-07-26 SAS926 IAD → CPH Jul 26, 00:15 UTCJul 26, 07:35 UTC7h 21m
2026-07-25 SAS925 CPH → IAD Jul 25, 12:40 UTCJul 25, 20:40 UTC8h 0m
2026-07-25 SAS936 SFO → CPH Jul 25, 00:05 UTCJul 25, 09:35 UTC9h 30m
2026-07-24 SAS935 CPH → SFO Jul 24, 11:00 UTCJul 24, 21:30 UTC10h 30m
2026-07-23 SAS930 ATL → CPH Jul 23, 23:45 UTCJul 24, 07:30 UTC7h 45m
2026-07-23 SAS929 CPH → ATL Jul 23, 12:00 UTCJul 23, 21:10 UTC9h 10m
2026-07-22 SAS988 ICN → CPH Jul 22, 14:55 UTCJul 23, 03:25 UTC12h 30m
2026-07-21 SAS987 CPH → ICN Jul 21, 22:00 UTCJul 22, 01:35 UTC3h 35m
2026-07-21 SAS984 HND → CPH Jul 21, 02:25 UTCJul 21, 15:05 UTC12h 40m
2026-07-20 SAS983 CPH → HND Jul 20, 11:00 UTCJul 20, 22:55 UTC11h 55m
2026-07-20 SAS930 ATL → CPH Jul 20, 00:20 UTCJul 20, 08:25 UTC8h 5m
2026-07-19 SAS929 CPH → ATL Jul 19, 11:50 UTCJul 19, 20:50 UTC9h 0m
2026-07-19 SAS926 IAD → CPH Jul 19, 01:45 UTCJul 19, 09:05 UTC7h 20m
2026-07-18 SAS925 CPH → IAD Jul 18, 12:35 UTCJul 18, 22:00 UTC9h 25m
2026-07-18 SAS936 - Jul 18, 00:15 UTCJul 18, 09:40 UTC9h 26m
2026-07-17 SAS935 - Jul 17, 18:29 UTCJul 17, 22:00 UTC3h 30m
2026-07-17 SAS935 - Jul 17, 11:04 UTCJul 17, 17:55 UTC6h 50m
2026-07-17 SAS926 IAD → CPH Jul 17, 00:35 UTCJul 17, 07:44 UTC7h 10m
2026-07-16 SAS925 CPH → IAD Jul 16, 12:49 UTCJul 16, 20:39 UTC7h 50m
2026-07-16 SAS936 - Jul 16, 06:45 UTCJul 16, 10:00 UTC3h 15m
2026-07-16 SAS936 - Jul 16, 00:20 UTCJul 16, 02:50 UTC2h 30m
2026-07-15 SAS935 CPH → SFO Jul 15, 11:05 UTCJul 15, 21:35 UTC10h 30m
2026-07-14 SAS930 ATL → CPH Jul 14, 00:25 UTCJul 14, 08:45 UTC8h 20m
2026-07-13 SAS929 CPH → ATL Jul 13, 12:10 UTCJul 13, 21:00 UTC8h 50m
2026-07-13 SAS930 ATL → CPH Jul 13, 00:01 UTCJul 13, 08:25 UTC8h 25m
2026-07-12 SAS929 CPH → ATL Jul 12, 12:05 UTCJul 12, 21:00 UTC8h 55m
2026-07-11 SAS988 - Jul 11, 19:35 UTCJul 12, 03:15 UTC7h 40m
2026-07-11 SAS988 - Jul 11, 14:45 UTCJul 11, 15:10 UTC25m
2026-07-11 SAS987 - Jul 11, 08:35 UTCJul 11, 09:00 UTC25m
2026-07-10 SAS987 - Jul 10, 22:15 UTCJul 11, 07:25 UTC9h 10m
2026-07-10 SAS984 HND → CPH Jul 10, 02:20 UTCJul 10, 15:35 UTC13h 15m
2026-07-09 SAS983 - Jul 9, 11:05 UTCJul 9, 23:05 UTC12h 0m
2026-07-08 SAS988 - Jul 8, 14:45 UTCJul 9, 03:35 UTC12h 50m
2026-07-08 SAS987 - Jul 8, 08:35 UTCJul 8, 09:00 UTC25m
2026-07-07 SAS987 - Jul 7, 22:15 UTCJul 8, 07:55 UTC9h 40m
2026-07-07 SAS984 HND → CPH Jul 7, 02:35 UTCJul 7, 15:45 UTC13h 10m
2026-07-06 SAS983 CPH → NRT Jul 6, 11:05 UTCJul 6, 23:15 UTC12h 10m
2026-07-06 SAS926 IAD → CPH Jul 6, 01:10 UTCJul 6, 08:10 UTC7h 0m
2026-07-05 SAS925 CPH → IAD Jul 5, 12:45 UTCJul 5, 20:45 UTC8h 0m
2026-07-05 SAS936 SFO → CPH Jul 5, 00:00 UTCJul 5, 09:45 UTC9h 45m
2026-07-04 SAS935 CPH → SFO Jul 4, 11:10 UTCJul 4, 21:40 UTC10h 30m
2026-07-02 SAS988 - Jul 2, 14:50 UTCJul 3, 03:15 UTC12h 25m
2026-07-02 SAS987 - Jul 2, 09:00 UTCJul 2, 09:25 UTC25m
2026-07-01 SAS987 - Jul 1, 22:05 UTCJul 2, 08:15 UTC10h 10m
2026-07-01 SAS984 HND → CPH Jul 1, 02:30 UTCJul 1, 15:25 UTC12h 55m
2026-06-30 SAS983 CPH → NRT Jun 30, 11:00 UTCJun 30, 23:25 UTC12h 25m
2026-06-29 SAS930 ATL → CPH Jun 29, 23:44 UTCJun 30, 07:55 UTC8h 11m
2026-06-29 SAS929 CPH → ATL Jun 29, 12:00 UTCJun 29, 20:30 UTC8h 30m
2026-06-28 SAS930 ATL → CPH Jun 28, 23:44 UTCJun 29, 07:50 UTC8h 5m
2026-06-28 SAS929 CPH → ATL Jun 28, 12:09 UTCJun 28, 20:34 UTC8h 25m

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?
Yes. Mode-S 4ACA63 is currently airborne.
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 17 distinct callsigns, including SAS987, SAS936, SAS935, SAS926, SAS925.