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sensors Mode-S transponder

4AC9E1

ICAO 24-bit transponder address · allocated to Sweden

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

Hex
4AC9E1
Octal
22544741
Decimal
4,901,345
Country
SE
Tail
SE-ROA
Type
A20N
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
493
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S 4AC9E1.

Country allocation

The ICAO 24-bit address 4AC9E1 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
SAS2822 Scandinavian Airlines System 7 2026-07-25
SAS2821 Scandinavian Airlines System 7 2026-07-25
SAS46C Scandinavian Airlines System 6 2026-06-07
SAS010 Scandinavian Airlines System 6 2026-06-07
SAS2678 Scandinavian Airlines System 5 2026-05-29
SAS2677 Scandinavian Airlines System 5 2026-05-29
SAS2546 Scandinavian Airlines System 5 2026-06-09
SAS2545 Scandinavian Airlines System 5 2026-06-09
SAS2065 Scandinavian Airlines System 5 2026-05-28
SAS2064 Scandinavian Airlines System 5 2026-05-28
SAS11M - 5 2026-07-02
SAS780 Scandinavian Airlines System 4 2026-04-23
SAS779 Scandinavian Airlines System 4 2026-04-23
SAS7762 Scandinavian Airlines System 4 2026-07-23
SAS751 Scandinavian Airlines System 4 2026-04-16
SAS52R Scandinavian Airlines System 4 2026-04-16
SAS51H Scandinavian Airlines System 4 2026-04-23
SAS22Y Scandinavian Airlines System 4 2026-05-26
SAS22E - 4 2026-07-02
SAS2062 Scandinavian Airlines System 4 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SAS7724 CHQ → CPH Jul 26, 19:15 UTCJul 26, 22:15 UTC3h 0m
2026-07-26 SAS7723 CPH → CHQ Jul 26, 14:50 UTCJul 26, 18:05 UTC3h 15m
2026-07-26 SAS7772 LPA → CPH Jul 26, 09:30 UTCJul 26, 12:55 UTC3h 25m
2026-07-26 SAS75C CPH → HER Jul 26, 05:20 UTCJul 26, 08:10 UTC2h 51m
2026-07-25 SAS2822 GZP → CPH Jul 25, 19:15 UTCJul 25, 22:40 UTC3h 25m
2026-07-25 SAS2821 CPH → GZP Jul 25, 14:40 UTCJul 25, 17:50 UTC3h 10m
2026-07-25 SAS7774 JTR → CPH Jul 25, 10:10 UTCJul 25, 13:30 UTC3h 20m
2026-07-25 SAS7773 CPH → TFS Jul 25, 05:35 UTCJul 25, 08:30 UTC2h 55m
2026-07-24 SAS792 CPH → NCE Jul 24, 19:10 UTCJul 24, 21:05 UTC1h 55m
2026-07-24 SAS791 NCE → CPH Jul 24, 18:05 UTCJul 24, 18:15 UTC10m
2026-07-24 SAS791 NCE → CPH Jul 24, 15:55 UTCJul 24, 17:55 UTC2h 0m
2026-07-24 SAS2768 MLA → CPH Jul 24, 10:50 UTCJul 24, 14:10 UTC3h 20m
2026-07-24 SAS44A LPA → CPH Jul 24, 06:50 UTCJul 24, 09:30 UTC2h 40m
2026-07-23 SAS7762 KGS → CPH Jul 23, 08:25 UTCJul 23, 11:50 UTC3h 25m
2026-07-23 SAS7761 CPH → KGS Jul 23, 03:50 UTCJul 23, 07:00 UTC3h 10m
2026-07-22 SAS2620 SZG → CPH Jul 22, 11:10 UTCJul 22, 11:50 UTC40m
2026-07-22 SAS400 CPH → ARN Jul 22, 04:05 UTCJul 22, 05:05 UTC1h 0m
2026-07-21 SAS7562 SMI → BLL Jul 21, 19:05 UTCJul 21, 22:30 UTC3h 25m
2026-07-21 SAS7561 - Jul 21, 14:45 UTCJul 21, 17:55 UTC3h 10m
2026-07-20 SAS51B BCN → CPH Jul 20, 18:35 UTCJul 20, 20:55 UTC2h 20m
2026-07-20 SAS65D CPH → BCN Jul 20, 13:55 UTCJul 20, 16:30 UTC2h 35m
2026-07-20 SAS7762 - Jul 20, 08:40 UTCJul 20, 12:10 UTC3h 30m
2026-07-20 SAS7761 CPH → KGS Jul 20, 04:05 UTCJul 20, 07:15 UTC3h 10m
2026-07-19 SAS37L - Jul 19, 18:10 UTCJul 19, 21:10 UTC3h 0m
2026-07-19 SAS2817 CPH → CHQ Jul 19, 13:50 UTCJul 19, 16:55 UTC3h 5m
2026-07-19 SAS7754 LXS → CPH Jul 19, 08:15 UTCJul 19, 10:50 UTC2h 35m
2026-07-19 SAS7753 CPH → LXS Jul 19, 04:30 UTCJul 19, 07:00 UTC2h 30m
2026-07-18 SAS7710 RHO → BLL Jul 18, 21:00 UTCJul 19, 00:00 UTC3h 0m
2026-07-18 SAS7709 CPH → MIR Jul 18, 16:15 UTCJul 18, 19:05 UTC2h 50m
2026-07-18 SAS1914 JTR → CPH Jul 18, 09:45 UTCJul 18, 12:50 UTC3h 5m
2026-07-18 SAS1913 CPH → JTR Jul 18, 05:15 UTCJul 18, 08:15 UTC3h 0m
2026-07-17 SAS7790 LPA → BLL Jul 17, 16:55 UTCJul 17, 20:44 UTC3h 50m
2026-07-17 SAS7789 CPH → AYT Jul 17, 12:15 UTCJul 17, 15:44 UTC3h 30m
2026-07-17 SAS7598 - Jul 17, 08:20 UTCJul 17, 10:40 UTC2h 20m
2026-07-17 SAS7597 - Jul 17, 04:29 UTCJul 17, 06:50 UTC2h 20m
2026-07-16 SAS1475 OSL → CPH Jul 16, 19:10 UTCJul 16, 20:00 UTC50m
2026-07-16 SAS91K - Jul 16, 14:10 UTCJul 16, 15:10 UTC1h 0m
2026-07-16 SAS7762 - Jul 16, 08:30 UTCJul 16, 11:50 UTC3h 20m
2026-07-16 SAS7761 CPH → AYT Jul 16, 03:55 UTCJul 16, 07:05 UTC3h 10m
2026-07-15 SAS1936 - Jul 15, 18:25 UTCJul 15, 21:45 UTC3h 20m
2026-07-15 SAS1935 - Jul 15, 13:55 UTCJul 15, 16:50 UTC2h 55m
2026-07-15 SAS2861 BGO → CPH Jul 15, 08:35 UTCJul 15, 09:50 UTC1h 15m
2026-07-14 SAS2874 CPH → BGO Jul 14, 21:20 UTCJul 14, 22:20 UTC1h 0m
2026-07-14 SAS7762 AYT → CPH Jul 14, 16:20 UTCJul 14, 19:45 UTC3h 25m
2026-07-14 SAS9239 - Jul 14, 11:30 UTCJul 14, 14:40 UTC3h 10m
2026-07-13 SAS1475 OSL → CPH Jul 13, 19:05 UTCJul 13, 20:00 UTC55m
2026-07-13 SAS1470 CPH → OSL Jul 13, 17:15 UTCJul 13, 18:05 UTC50m
2026-07-13 SAS1429 ARN → CPH Jul 13, 15:30 UTCJul 13, 16:20 UTC50m
2026-07-13 SAS1491 - Jul 13, 12:10 UTCJul 13, 13:35 UTC1h 25m
2026-07-13 SAS1492 - Jul 13, 09:35 UTCJul 13, 11:05 UTC1h 30m

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

Mode-S 4AC9E1 frequently asked

What is Mode-S code 4AC9E1?
4AC9E1 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-ROA.
Where is Mode-S 4AC9E1 registered?
Mode-S code 4AC9E1 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4AC9E1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4AC9E1, octal 22544741, decimal 4,901,345.
What flights does 4AC9E1 operate?
Mode-S 4AC9E1 has broadcast 20 distinct callsigns, including SAS2822, SAS2821, SAS46C, SAS010, SAS2678.