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sensors Mode-S transponder

4AC9E2

ICAO 24-bit transponder address · allocated to Sweden

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

Hex
4AC9E2
Octal
22544742
Decimal
4,901,346
Country
SE
Tail
SE-ROB
Type
A20N
Broadcasting now · callsign SAS72U · 5,750 ft
Flights observed
565
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 21:15 UTC

Current position

4AC9E2 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4AC9E2 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
SAS2865 - 7 2026-07-10
SAS2862 - 7 2026-07-10
SAS2822 Scandinavian Airlines System 6 2026-07-21
SAS2821 Scandinavian Airlines System 6 2026-07-21
SAS832 Scandinavian Airlines System 5 2026-05-28
SAS831 Scandinavian Airlines System 5 2026-05-27
SAS44D - 5 2026-07-15
SAS2802 Scandinavian Airlines System 5 2026-05-29
SAS22H - 5 2026-07-15
SAS1421 Scandinavian Airlines System 5 2026-07-23
SAS7774 - 4 2026-07-04
SAS7773 - 4 2026-07-04
SAS7724 - 4 2026-07-05
SAS7723 - 4 2026-07-05
SAS58E Scandinavian Airlines System 4 2026-07-23
SAS554 Scandinavian Airlines System 4 2026-05-22
SAS54C Scandinavian Airlines System 4 2026-07-23
SAS50G - 4 2026-06-21
SAS49M Scandinavian Airlines System 4 2026-05-22
SAS46C - 4 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SAS37L ARN → CDG Jul 26, 18:05 UTCJul 26, 21:15 UTC3h 10m
2026-07-26 SAS2817 CPH → CHQ Jul 26, 14:00 UTCJul 26, 16:55 UTC2h 55m
2026-07-26 SAS7754 LXS → CPH Jul 26, 08:05 UTCJul 26, 10:50 UTC2h 45m
2026-07-26 SAS7753 CPH → LXS Jul 26, 04:30 UTCJul 26, 06:55 UTC2h 26m
2026-07-25 SAS7710 RHO → BLL Jul 25, 20:35 UTCJul 25, 23:45 UTC3h 10m
2026-07-25 SAS7709 CPH → MIR Jul 25, 16:25 UTCJul 25, 19:10 UTC2h 45m
2026-07-25 SAS92U MAD → CPH Jul 25, 11:30 UTCJul 25, 14:15 UTC2h 45m
2026-07-25 SAS581 CPH → MAD Jul 25, 06:45 UTCJul 25, 09:40 UTC2h 55m
2026-07-25 SAS2861 BGO → CPH Jul 25, 04:10 UTCJul 25, 05:10 UTC1h 0m
2026-07-24 SAS295 OSL → BGO Jul 24, 20:15 UTCJul 24, 20:55 UTC40m
2026-07-24 SAS73B TRD → OSL Jul 24, 18:50 UTCJul 24, 19:25 UTC35m
2026-07-24 SAS364 OSL → TRD Jul 24, 17:25 UTCJul 24, 18:00 UTC35m
2026-07-24 SAS4840 SPU → OSL Jul 24, 11:00 UTCJul 24, 13:40 UTC2h 40m
2026-07-24 SAS4839 OSL → SPU Jul 24, 07:25 UTCJul 24, 09:25 UTC2h 0m
2026-07-23 SAS1470 CPH → OSL Jul 23, 17:10 UTCJul 23, 18:00 UTC50m
2026-07-23 SAS1779 CPH → FAE Jul 23, 11:20 UTCJul 23, 16:00 UTC4h 40m
2026-07-23 SAS1421 ARN → CPH Jul 23, 09:20 UTCJul 23, 10:10 UTC50m
2026-07-23 SAS58E CPH → ARN Jul 23, 07:05 UTCJul 23, 08:05 UTC1h 0m
2026-07-23 SAS54C ARN → CPH Jul 23, 05:05 UTCJul 23, 06:00 UTC55m
2026-07-22 SAS79E BER → ARN Jul 22, 19:55 UTCJul 22, 21:10 UTC1h 15m
2026-07-22 SAS95W ARN → BER Jul 22, 17:15 UTCJul 22, 18:30 UTC1h 15m
2026-07-22 SAS1408 CPH → ARN Jul 22, 15:20 UTCJul 22, 16:15 UTC55m
2026-07-21 SAS2822 GZP → CPH Jul 21, 16:45 UTCJul 21, 20:15 UTC3h 30m
2026-07-21 SAS2821 CPH → GZP Jul 21, 12:35 UTCJul 21, 15:50 UTC3h 15m
2026-07-21 SAS1996 BCN → CPH Jul 21, 08:15 UTCJul 21, 10:35 UTC2h 20m
2026-07-21 SAS1995 CPH → BCN Jul 21, 04:25 UTCJul 21, 07:00 UTC2h 35m
2026-07-20 SAS2814 ALC → CPH Jul 20, 18:20 UTCJul 20, 21:10 UTC2h 50m
2026-07-20 SAS2813 CPH → ALC Jul 20, 13:50 UTCJul 20, 16:55 UTC3h 5m
2026-07-20 SAS87F OSL → CPH Jul 20, 11:45 UTCJul 20, 12:35 UTC50m
2026-07-20 SAS238 BGO → OSL Jul 20, 04:10 UTCJul 20, 04:50 UTC40m
2026-07-19 SAS2874 CPH → BGO Jul 19, 21:40 UTCJul 19, 22:40 UTC1h 0m
2026-07-19 SAS1910 BIO → CPH Jul 19, 18:35 UTCJul 19, 20:45 UTC2h 10m
2026-07-19 SAS33G - Jul 19, 14:45 UTCJul 19, 17:10 UTC2h 25m
2026-07-19 SAS53C ARN → CPH Jul 19, 11:30 UTCJul 19, 12:30 UTC1h 0m
2026-07-19 SAS2678 BER → ARN Jul 19, 09:10 UTCJul 19, 10:25 UTC1h 15m
2026-07-19 SAS2677 ARN → BER Jul 19, 06:45 UTCJul 19, 08:05 UTC1h 20m
2026-07-18 SAS1428 CPH → ARN Jul 18, 21:25 UTCJul 18, 22:15 UTC50m
2026-07-18 SAS40G ARN → CPH Jul 18, 19:10 UTCJul 18, 20:00 UTC50m
2026-07-18 SAS1430 CPH → ARN Jul 18, 17:15 UTCJul 18, 18:00 UTC45m
2026-07-18 SAS2495 - Jul 18, 14:00 UTCJul 18, 16:00 UTC2h 0m
2026-07-18 SAS2494 - Jul 18, 11:05 UTCJul 18, 12:45 UTC1h 40m
2026-07-18 SAS1467 OSL → CPH Jul 18, 09:15 UTCJul 18, 10:05 UTC50m
2026-07-18 SAS83D - Jul 18, 07:05 UTCJul 18, 08:00 UTC55m
2026-07-18 SAS1415 ARN → CPH Jul 18, 04:10 UTCJul 18, 05:05 UTC55m
2026-07-17 SAS68L - Jul 17, 13:45 UTCJul 17, 15:10 UTC1h 25m
2026-07-17 SAS50F - Jul 17, 11:45 UTCJul 17, 12:55 UTC1h 10m
2026-07-17 SAS606 - Jul 17, 08:40 UTCJul 17, 10:40 UTC2h 0m
2026-07-17 SAS12M ARN → ZRH Jul 17, 05:20 UTCJul 17, 07:35 UTC2h 15m
2026-07-16 SAS868 - Jul 16, 11:05 UTCJul 16, 11:40 UTC35m
2026-07-16 SAS849 ARN → OSL Jul 16, 09:30 UTCJul 16, 10:10 UTC40m

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

Mode-S 4AC9E2 frequently asked

What is Mode-S code 4AC9E2?
4AC9E2 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-ROB.
Where is Mode-S 4AC9E2 registered?
Mode-S code 4AC9E2 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4AC9E2 broadcasting right now?
Yes. Mode-S 4AC9E2 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4AC9E2, octal 22544742, decimal 4,901,346.
What flights does 4AC9E2 operate?
Mode-S 4AC9E2 has broadcast 20 distinct callsigns, including SAS2865, SAS2862, SAS2822, SAS2821, SAS832.