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sensors Mode-S transponder

4ACAA4

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RUD · AIRBUS A-320neo

Hex
4ACAA4
Octal
22545244
Decimal
4,901,540
Country
SE
Tail
SE-RUD
Type
A20N
No current signal · last broadcast Jul 26, 21:00 UTC
Flights observed
506
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 21:00 UTC

Last known position

Most recent position reported by Mode-S 4ACAA4.

Country allocation

The ICAO 24-bit address 4ACAA4 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 20 distinct

Callsign Airline Flights Last seen
SAS69L - 6 2026-07-04
SAS4546 Scandinavian Airlines System 6 2026-07-02
SAS4434 Scandinavian Airlines System 6 2026-05-31
SAS4105 - 6 2026-07-09
SAS91K - 5 2026-06-21
SAS87F - 5 2026-06-21
SAS810 - 5 2026-06-17
SAS809 Scandinavian Airlines System 5 2026-06-17
SAS4717 - 5 2026-07-09
SAS4545 - 5 2026-07-02
SAS20W - 5 2026-07-09
SAS897 - 4 2026-06-16
SAS53F Scandinavian Airlines System 4 2026-06-01
SAS452 Scandinavian Airlines System 4 2026-06-13
SAS44Z Scandinavian Airlines System 4 2026-06-01
SAS4417 Scandinavian Airlines System 4 2026-06-01
SAS4126 - 4 2026-07-08
SAS4124 Scandinavian Airlines System 4 2026-05-29
SAS4098 - 4 2026-07-01
SAS4094 - 4 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SAS1818 AGP → ARN Jul 26, 17:00 UTCJul 26, 21:00 UTC4h 0m
2026-07-26 SAS1817 ARN → AGP Jul 26, 11:25 UTCJul 26, 15:15 UTC3h 50m
2026-07-26 SAS82K LLA → ARN Jul 26, 06:05 UTCJul 26, 07:10 UTC1h 6m
2026-07-25 SAS2002 ARN → LLA Jul 25, 16:50 UTCJul 25, 17:40 UTC50m
2026-07-25 SAS7930 JSI → ARN Jul 25, 10:20 UTCJul 25, 13:30 UTC3h 10m
2026-07-25 SAS43E - Jul 25, 05:40 UTCJul 25, 08:25 UTC2h 45m
2026-07-24 SAS2932 NCE → ARN Jul 24, 18:35 UTCJul 24, 21:25 UTC2h 50m
2026-07-24 SAS2931 ARN → NCE Jul 24, 14:45 UTCJul 24, 17:30 UTC2h 45m
2026-07-24 SAS1950 TIA → ARN Jul 24, 10:35 UTCJul 24, 13:10 UTC2h 35m
2026-07-24 SAS1949 ARN → TIA Jul 24, 06:15 UTCJul 24, 08:35 UTC2h 20m
2026-07-23 SAS2904 LIS → ARN Jul 23, 17:35 UTCJul 23, 21:30 UTC3h 55m
2026-07-23 SAS2903 ARN → LIS Jul 23, 11:55 UTCJul 23, 15:55 UTC4h 0m
2026-07-23 SAS2690 MXP → ARN Jul 23, 08:10 UTCJul 23, 10:30 UTC2h 20m
2026-07-23 SAS2689 ARN → MXP Jul 23, 04:30 UTCJul 23, 06:45 UTC2h 15m
2026-07-21 SAS1558 AMS → ARN Jul 21, 19:40 UTCJul 21, 21:35 UTC1h 55m
2026-07-21 SAS1557 ARN → AMS Jul 21, 16:40 UTCJul 21, 18:20 UTC1h 40m
2026-07-21 SAS58M LIN → ARN Jul 21, 11:25 UTCJul 21, 13:40 UTC2h 15m
2026-07-21 SAS63Z ARN → LIN Jul 21, 07:30 UTCJul 21, 09:45 UTC2h 15m
2026-07-20 SAS1810 PMI → ARN Jul 20, 19:10 UTCJul 20, 22:25 UTC3h 15m
2026-07-20 SAS236L ARN → PMI Jul 20, 14:05 UTCJul 20, 17:15 UTC3h 10m
2026-07-20 SAS1582 - Jul 20, 09:20 UTCJul 20, 12:40 UTC3h 20m
2026-07-20 SAS1581 ARN → MAD Jul 20, 04:25 UTCJul 20, 07:55 UTC3h 30m
2026-07-19 SAS86L - Jul 19, 19:00 UTCJul 19, 21:05 UTC2h 5m
2026-07-19 SAS579 ARN → CDG Jul 19, 15:25 UTCJul 19, 17:35 UTC2h 10m
2026-07-19 SAS1850 PMO → ARN Jul 19, 10:20 UTCJul 19, 13:20 UTC3h 0m
2026-07-19 SAS1849 ARN → PMO Jul 19, 05:45 UTCJul 19, 09:05 UTC3h 20m
2026-07-17 SAS79E - Jul 17, 21:00 UTCJul 17, 22:15 UTC1h 15m
2026-07-17 SAS95W ARN → BER Jul 17, 18:19 UTCJul 17, 19:40 UTC1h 20m
2026-07-17 SAS1408 CPH → ARN Jul 17, 15:49 UTCJul 17, 16:40 UTC50m
2026-07-17 SAS1407 ARN → CPH Jul 17, 13:20 UTCJul 17, 14:24 UTC1h 5m
2026-07-17 SAS868 OSL → ARN Jul 17, 10:25 UTCJul 17, 11:04 UTC40m
2026-07-17 SAS849 ARN → OSL Jul 17, 08:40 UTCJul 17, 09:25 UTC45m
2026-07-17 SAS864 - Jul 17, 06:54 UTCJul 17, 07:35 UTC40m
2026-07-17 SAS55P ARN → OSL Jul 17, 05:10 UTCJul 17, 05:50 UTC40m
2026-07-16 SAS1410 - Jul 16, 19:35 UTCJul 16, 20:35 UTC1h 0m
2026-07-16 SAS242F OSL → CPH Jul 16, 13:15 UTCJul 16, 14:10 UTC55m
2026-07-15 SAS4702 - Jul 15, 20:05 UTCJul 15, 22:35 UTC2h 30m
2026-07-15 SAS4701 OSL → NCE Jul 15, 15:10 UTCJul 15, 17:50 UTC2h 40m
2026-07-15 SAS4780 LCA → OSL Jul 15, 09:40 UTCJul 15, 14:00 UTC4h 20m
2026-07-15 SAS4779 - Jul 15, 04:10 UTCJul 15, 08:20 UTC4h 10m
2026-07-14 SAS4734 - Jul 14, 17:20 UTCJul 14, 19:45 UTC2h 25m
2026-07-14 SAS4733 - Jul 14, 13:45 UTCJul 14, 16:05 UTC2h 20m
2026-07-14 SAS4788 - Jul 14, 09:25 UTCJul 14, 11:45 UTC2h 20m
2026-07-14 SAS4787 - Jul 14, 05:45 UTCJul 14, 08:05 UTC2h 20m
2026-07-13 SAS4734 - Jul 13, 18:20 UTCJul 13, 20:40 UTC2h 20m
2026-07-13 SAS4733 - Jul 13, 14:40 UTCJul 13, 16:50 UTC2h 10m
2026-07-13 SAS4932 - Jul 13, 10:40 UTCJul 13, 13:10 UTC2h 30m
2026-07-13 SAS4931 - Jul 13, 06:45 UTCJul 13, 09:15 UTC2h 30m
2026-07-13 SAS341 TRD → OSL Jul 13, 05:01 UTCJul 13, 05:45 UTC45m
2026-07-12 SAS4654 ALC → TRD Jul 12, 20:01 UTCJul 12, 23:40 UTC3h 40m

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

Mode-S 4ACAA4 frequently asked

What is Mode-S code 4ACAA4?
4ACAA4 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RUD.
Where is Mode-S 4ACAA4 registered?
Mode-S code 4ACAA4 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACAA4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACAA4, octal 22545244, decimal 4,901,540.
What flights does 4ACAA4 operate?
Mode-S 4ACAA4 has broadcast 20 distinct callsigns, including SAS69L, SAS4546, SAS4434, SAS4105, SAS91K.