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
Broadcasting now · callsign SAS930 · 39,000 ft
Flights observed
150
Distinct callsigns
17
Country
SE
Last broadcast
1h ago

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 - 19 2026-07-11
SAS936 - 16 2026-07-05
SAS935 Scandinavian Airlines System 15 2026-07-04
SAS984 - 14 2026-07-10
SAS983 - 14 2026-07-09
SAS926 - 14 2026-07-06
SAS925 Scandinavian Airlines System 14 2026-07-05
SAS988 - 13 2026-07-11
SAS930 - 7 2026-07-14
SAS929 - 7 2026-07-13
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
2026-07-14 SAS930 - Jul 14, 00:25 UTCJul 14, 00:45 UTC20m
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
2026-06-27 SAS930 ATL → CPH Jun 27, 23:39 UTCJun 28, 07:44 UTC8h 5m
2026-06-27 SAS929 CPH → ATL Jun 27, 12:04 UTCJun 27, 20:44 UTC8h 40m
2026-06-26 SAS988 - Jun 26, 15:54 UTCJun 27, 03:34 UTC11h 40m
2026-06-26 SAS988 - Jun 26, 14:44 UTCJun 26, 15:05 UTC20m
2026-06-26 SAS987 - Jun 26, 08:45 UTCJun 26, 09:10 UTC25m
2026-06-25 SAS987 - Jun 25, 22:10 UTCJun 26, 07:50 UTC9h 40m
2026-06-25 SAS984 HND → CPH Jun 25, 02:25 UTCJun 25, 15:24 UTC13h 0m
2026-06-24 SAS983 CPH → NRT Jun 24, 11:09 UTCJun 24, 23:10 UTC12h 0m
2026-06-23 SAS936 SFO → CPH Jun 23, 00:15 UTCJun 23, 09:54 UTC9h 40m
2026-06-22 SAS935 CPH → SFO Jun 22, 11:14 UTCJun 22, 21:35 UTC10h 20m
2026-06-21 SAS938 - Jun 21, 23:24 UTCJun 22, 08:04 UTC8h 40m
2026-06-21 SAS937 - Jun 21, 11:30 UTCJun 21, 20:29 UTC9h 0m
2026-06-20 SAS938 ARN → AES Jun 20, 23:10 UTCJun 21, 07:55 UTC8h 45m
2026-06-20 SAS937 SEA → CPH Jun 20, 11:30 UTCJun 20, 20:20 UTC8h 50m
2026-06-19 SAS988 - Jun 19, 14:49 UTCJun 20, 03:49 UTC13h 0m
2026-06-19 SAS987 - Jun 19, 08:44 UTCJun 19, 09:14 UTC30m
2026-06-18 SAS987 - Jun 18, 22:10 UTCJun 19, 04:39 UTC6h 29m
2026-06-18 SAS984 HND → CPH Jun 18, 02:40 UTCJun 18, 15:35 UTC12h 55m
2026-06-17 SAS983 CPH → NRT Jun 17, 11:15 UTCJun 17, 23:30 UTC12h 15m
2026-06-16 SAS938 ARN → AES Jun 16, 23:15 UTCJun 17, 07:55 UTC8h 40m
2026-06-16 SAS937 SEA → CPH Jun 16, 11:25 UTCJun 16, 20:30 UTC9h 6m
2026-06-15 SAS930 ATL → CPH Jun 15, 23:50 UTCJun 16, 07:50 UTC8h 0m

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, SAS984, SAS983.