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sensors Mode-S transponder

4ACAAF

ICAO 24-bit transponder address · allocated to Sweden

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

Hex
4ACAAF
Octal
22545257
Decimal
4,901,551
Country
SE
Tail
SE-RUO
Type
A20N
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
497
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S 4ACAAF.

Country allocation

The ICAO 24-bit address 4ACAAF 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
SAS4434 - 10 2026-07-20
SAS44Z Scandinavian Airlines System 7 2026-07-21
SAS4095 Scandinavian Airlines System 7 2026-07-18
SAS4094 Scandinavian Airlines System 7 2026-07-18
SAS32T - 7 2026-07-20
SAS242F Scandinavian Airlines System 7 2026-07-20
SAS71A Scandinavian Airlines System 5 2026-07-21
SAS67B Scandinavian Airlines System 5 2026-07-21
SAS52L - 5 2026-07-02
SAS4083 Scandinavian Airlines System 5 2026-05-30
SAS4082 Scandinavian Airlines System 5 2026-05-30
SAS4079 Scandinavian Airlines System 5 2026-05-15
SAS93L - 4 2026-06-16
SAS839 - 4 2026-06-16
SAS76F Scandinavian Airlines System 4 2026-07-26
SAS73A - 4 2026-07-02
SAS69L Scandinavian Airlines System 4 2026-07-19
SAS4438 Scandinavian Airlines System 4 2026-07-18
SAS4098 Scandinavian Airlines System 4 2026-05-14
SAS238 - 4 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SAS37A ALC → OSL Jul 26, 18:55 UTCJul 26, 21:45 UTC2h 50m
2026-07-26 SAS76F OSL → ALC Jul 26, 14:00 UTCJul 26, 17:10 UTC3h 10m
2026-07-26 SAS11M ALC → OSL Jul 26, 09:25 UTCJul 26, 12:50 UTC3h 25m
2026-07-26 SAS22E FCO → CPH Jul 26, 04:35 UTCJul 26, 07:50 UTC3h 16m
2026-07-25 SAS7368 PMI → BGO Jul 25, 19:30 UTCJul 25, 23:20 UTC3h 50m
2026-07-25 SAS7367 BGO → PMI Jul 25, 14:05 UTCJul 25, 17:30 UTC3h 25m
2026-07-25 SAS7328 SPU → OSL Jul 25, 09:30 UTCJul 25, 11:55 UTC2h 25m
2026-07-25 SAS7327 OSL → SPU Jul 25, 05:50 UTCJul 25, 07:55 UTC2h 5m
2026-07-24 SAS4734 SPU → OSL Jul 24, 19:05 UTCJul 24, 21:40 UTC2h 35m
2026-07-24 SAS4733 OSL → SPU Jul 24, 15:35 UTCJul 24, 17:35 UTC2h 0m
2026-07-24 SAS67E FRA → CPH Jul 24, 10:30 UTCJul 24, 14:35 UTC4h 5m
2026-07-24 SAS53P CPH → PMI Jul 24, 04:40 UTCJul 24, 08:00 UTC3h 20m
2026-07-23 SAS4782 PUY → OSL Jul 23, 18:30 UTCJul 23, 21:00 UTC2h 30m
2026-07-23 SAS4781 OSL → PUY Jul 23, 15:25 UTCJul 23, 17:25 UTC2h 0m
2026-07-23 SAS11M ALC → OSL Jul 23, 09:40 UTCJul 23, 13:20 UTC3h 40m
2026-07-23 SAS22E FCO → CPH Jul 23, 04:40 UTCJul 23, 07:45 UTC3h 5m
2026-07-22 SAS4882 CTA → OSL Jul 22, 16:20 UTCJul 22, 19:40 UTC3h 20m
2026-07-22 SAS4881 - Jul 22, 12:00 UTCJul 22, 15:10 UTC3h 10m
2026-07-22 SAS78K DUS → OSL Jul 22, 11:10 UTCJul 22, 11:15 UTC5m
2026-07-21 SAS46B AGP → OSL Jul 21, 18:20 UTCJul 21, 22:05 UTC3h 45m
2026-07-21 SAS38R - Jul 21, 13:20 UTCJul 21, 17:00 UTC3h 40m
2026-07-21 SAS71A BOO → OSL Jul 21, 10:50 UTCJul 21, 11:55 UTC1h 5m
2026-07-21 SAS67B OSL → BOO Jul 21, 08:35 UTCJul 21, 09:50 UTC1h 15m
2026-07-21 SAS44Z TOS → OSL Jul 21, 05:40 UTCJul 21, 07:05 UTC1h 25m
2026-07-20 SAS4434 - Jul 20, 18:25 UTCJul 20, 19:45 UTC1h 20m
2026-07-20 SAS32T - Jul 20, 15:15 UTCJul 20, 16:05 UTC50m
2026-07-20 SAS242F OSL → CPH Jul 20, 13:15 UTCJul 20, 14:10 UTC55m
2026-07-20 SAS71A BOO → OSL Jul 20, 10:30 UTCJul 20, 11:40 UTC1h 10m
2026-07-20 SAS67B OSL → BOO Jul 20, 08:30 UTCJul 20, 09:40 UTC1h 10m
2026-07-20 SAS44Z TOS → OSL Jul 20, 05:35 UTCJul 20, 07:00 UTC1h 25m
2026-07-19 SAS4434 - Jul 19, 18:20 UTCJul 19, 19:35 UTC1h 15m
2026-07-19 SAS32T - Jul 19, 15:20 UTCJul 19, 16:15 UTC55m
2026-07-19 SAS242F OSL → CPH Jul 19, 13:10 UTCJul 19, 14:00 UTC50m
2026-07-19 SAS822 AMS → OSL Jul 19, 10:55 UTCJul 19, 12:20 UTC1h 25m
2026-07-19 SAS821 OSL → AMS Jul 19, 08:05 UTCJul 19, 09:40 UTC1h 35m
2026-07-19 SAS69L TOS → OSL Jul 19, 04:10 UTCJul 19, 05:40 UTC1h 30m
2026-07-18 SAS4438 OSL → TOS Jul 18, 19:50 UTCJul 18, 21:05 UTC1h 15m
2026-07-18 SAS4095 EVE → OSL Jul 18, 17:05 UTCJul 18, 18:25 UTC1h 20m
2026-07-18 SAS4094 OSL → EVE Jul 18, 14:50 UTCJul 18, 15:55 UTC1h 5m
2026-07-18 SAS7466 KLX → OSL Jul 18, 09:45 UTCJul 18, 13:15 UTC3h 30m
2026-07-18 SAS7465 OSL → KLX Jul 18, 04:40 UTCJul 18, 08:15 UTC3h 35m
2026-07-17 SAS4479 - Jul 17, 16:40 UTCJul 17, 21:15 UTC4h 35m
2026-07-17 SAS4702 - Jul 17, 11:55 UTCJul 17, 14:20 UTC2h 25m
2026-07-17 SAS4701 OSL → NCE Jul 17, 07:05 UTCJul 17, 09:45 UTC2h 40m
2026-07-17 SAS4105 BOO → OSL Jul 17, 04:35 UTCJul 17, 05:50 UTC1h 15m
2026-07-16 SAS4126 - Jul 16, 20:05 UTCJul 16, 21:15 UTC1h 10m
2026-07-16 SAS1470 CPH → OSL Jul 16, 17:20 UTCJul 16, 18:10 UTC50m
2026-07-16 SAS1465 - Jul 16, 15:30 UTCJul 16, 16:19 UTC50m
2026-07-16 SAS4692 - Jul 16, 09:45 UTCJul 16, 12:55 UTC3h 10m
2026-07-16 SAS98W - Jul 16, 05:05 UTCJul 16, 08:20 UTC3h 15m

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

Mode-S 4ACAAF frequently asked

What is Mode-S code 4ACAAF?
4ACAAF is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RUO.
Where is Mode-S 4ACAAF registered?
Mode-S code 4ACAAF is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACAAF broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACAAF, octal 22545257, decimal 4,901,551.
What flights does 4ACAAF operate?
Mode-S 4ACAAF has broadcast 20 distinct callsigns, including SAS4434, SAS44Z, SAS4095, SAS4094, SAS32T.