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sensors Mode-S transponder

4AC9F9

ICAO 24-bit transponder address · allocated to Sweden

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

Hex
4AC9F9
Octal
22544771
Decimal
4,901,369
Country
SE
Tail
SE-ROY
Type
A20N
Broadcasting now · callsign SAS2645 · 38,025 ft
Flights observed
486
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 21:55 UTC

Current position

4AC9F9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4AC9F9 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
SAS91K - 6 2026-07-09
SAS4774 - 6 2026-07-06
SAS4773 - 6 2026-07-06
SAS4095 - 6 2026-06-23
SAS4094 - 6 2026-06-23
SAS89C - 5 2026-06-19
SAS341 - 5 2026-06-24
SAS93L - 4 2026-07-05
SAS87F - 4 2026-07-09
SAS839 - 4 2026-07-05
SAS812 - 4 2026-06-19
SAS811 Scandinavian Airlines System 4 2026-06-19
SAS69L Scandinavian Airlines System 4 2026-06-12
SAS64P - 4 2026-06-19
SAS53D - 4 2026-06-16
SAS4637 Scandinavian Airlines System 4 2026-04-28
SAS4122 - 4 2026-06-17
SAS39A - 4 2026-06-17
SAS38R - 4 2026-07-01
SAS380 - 4 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SAS2550 MAN → ARN Jul 26, 20:00 UTCJul 26, 21:50 UTC1h 50m
2026-07-26 SAS2549 ARN → MAN Jul 26, 16:35 UTCJul 26, 18:40 UTC2h 5m
2026-07-26 SAS79E BER → ARN Jul 26, 13:50 UTCJul 26, 15:05 UTC1h 15m
2026-07-26 SAS95W ARN → BER Jul 26, 11:20 UTCJul 26, 12:40 UTC1h 20m
2026-07-26 SAS898 BGO → ARN Jul 26, 08:35 UTCJul 26, 09:35 UTC1h 0m
2026-07-26 SAS96X ARN → BGO Jul 26, 06:30 UTCJul 26, 07:40 UTC1h 11m
2026-07-25 SAS1850 PMO → ARN Jul 25, 18:00 UTCJul 25, 21:10 UTC3h 10m
2026-07-25 SAS1849 ARN → PMO Jul 25, 13:35 UTCJul 25, 16:40 UTC3h 5m
2026-07-25 SAS7890 CFU → ARN Jul 25, 08:40 UTCJul 25, 11:45 UTC3h 5m
2026-07-25 SAS7889 ARN → CFU Jul 25, 04:05 UTCJul 25, 06:40 UTC2h 35m
2026-07-24 SAS1428 CPH → ARN Jul 24, 21:40 UTCJul 24, 22:30 UTC50m
2026-07-24 SAS40G ARN → CPH Jul 24, 19:05 UTCJul 24, 20:00 UTC55m
2026-07-24 SAS1430 CPH → ARN Jul 24, 17:10 UTCJul 24, 18:05 UTC55m
2026-07-24 SAS53T CPH → FAE Jul 24, 09:40 UTCJul 24, 14:20 UTC4h 40m
2026-07-24 SAS22H ARN → CPH Jul 24, 07:10 UTCJul 24, 08:00 UTC50m
2026-07-24 SAS44D CPH → ARN Jul 24, 05:20 UTCJul 24, 06:15 UTC55m
2026-07-23 SAS2822 GZP → CPH Jul 23, 17:20 UTCJul 23, 20:45 UTC3h 25m
2026-07-23 SAS2821 CPH → GZP Jul 23, 13:00 UTCJul 23, 16:15 UTC3h 15m
2026-07-23 SAS7438 HER → CPH Jul 23, 07:50 UTCJul 23, 11:00 UTC3h 10m
2026-07-23 SAS7437 CPH → HER Jul 23, 03:10 UTCJul 23, 06:00 UTC2h 50m
2026-07-22 SAS71G KEF → CPH Jul 22, 18:05 UTCJul 22, 20:40 UTC2h 35m
2026-07-22 SAS2595 KEF → CPH Jul 22, 13:40 UTCJul 22, 16:55 UTC3h 15m
2026-07-22 SAS53C ARN → CPH Jul 22, 11:40 UTCJul 22, 12:35 UTC55m
2026-07-22 SAS1881 ARN → PUY Jul 22, 05:00 UTCJul 22, 05:25 UTC25m
2026-07-21 SAS1574 ALC → ARN Jul 21, 19:10 UTCJul 21, 22:50 UTC3h 40m
2026-07-21 SAS1573 ARN → ALC Jul 21, 14:15 UTCJul 21, 17:50 UTC3h 35m
2026-07-20 SAS886 OSL → ARN Jul 20, 17:40 UTCJul 20, 18:20 UTC40m
2026-07-20 SAS885 ARN → OSL Jul 20, 16:05 UTCJul 20, 16:45 UTC40m
2026-07-20 SAS46C - Jul 20, 13:55 UTCJul 20, 15:00 UTC1h 5m
2026-07-20 SAS010 - Jul 20, 12:00 UTCJul 20, 12:55 UTC55m
2026-07-20 SAS606 ZRH → ARN Jul 20, 08:25 UTCJul 20, 10:25 UTC2h 0m
2026-07-20 SAS12M ARN → ZRH Jul 20, 05:05 UTCJul 20, 07:05 UTC2h 0m
2026-07-19 SAS54N SPU → ARN Jul 19, 17:45 UTCJul 19, 20:00 UTC2h 15m
2026-07-19 SAS39M DUS → OSL Jul 19, 14:20 UTCJul 19, 16:35 UTC2h 15m
2026-07-19 SAS92L - Jul 19, 09:55 UTCJul 19, 12:50 UTC2h 55m
2026-07-19 SAS63D ARN → SKG Jul 19, 05:45 UTCJul 19, 08:45 UTC3h 0m
2026-07-18 SAS1850 PMO → ARN Jul 18, 18:10 UTCJul 18, 21:05 UTC2h 55m
2026-07-18 SAS1849 ARN → PMO Jul 18, 13:35 UTCJul 18, 16:45 UTC3h 10m
2026-07-18 SAS7890 CFU → ARN Jul 18, 08:50 UTCJul 18, 11:30 UTC2h 40m
2026-07-18 SAS7889 ARN → CFU Jul 18, 04:05 UTCJul 18, 06:55 UTC2h 50m
2026-07-17 SAS86L CDG → ARN Jul 17, 19:20 UTCJul 17, 21:15 UTC1h 55m
2026-07-17 SAS579 - Jul 17, 15:35 UTCJul 17, 17:50 UTC2h 15m
2026-07-17 SAS82K - Jul 17, 04:10 UTCJul 17, 05:10 UTC1h 0m
2026-07-16 SAS22Y - Jul 16, 19:45 UTCJul 16, 20:45 UTC1h 0m
2026-07-16 SAS886 - Jul 16, 17:40 UTCJul 16, 18:25 UTC45m
2026-07-16 SAS4686 BCN → OSL Jul 16, 11:20 UTCJul 16, 14:10 UTC2h 50m
2026-07-16 SAS4685 - Jul 16, 05:45 UTCJul 16, 09:00 UTC3h 15m
2026-07-15 SAS4097 - Jul 15, 19:35 UTCJul 15, 20:50 UTC1h 15m
2026-07-15 SAS4096 - Jul 15, 17:10 UTCJul 15, 18:25 UTC1h 15m
2026-07-15 SAS32T - Jul 15, 15:20 UTCJul 15, 16:10 UTC50m

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

Mode-S 4AC9F9 frequently asked

What is Mode-S code 4AC9F9?
4AC9F9 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-ROY.
Where is Mode-S 4AC9F9 registered?
Mode-S code 4AC9F9 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4AC9F9 broadcasting right now?
Yes. Mode-S 4AC9F9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4AC9F9, octal 22544771, decimal 4,901,369.
What flights does 4AC9F9 operate?
Mode-S 4AC9F9 has broadcast 20 distinct callsigns, including SAS91K, SAS4774, SAS4773, SAS4095, SAS4094.