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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
Broadcasting now · callsign SAS7762 · 38,000 ft
Flights observed
450
Distinct callsigns
20
Country
SE
Last broadcast
47m ago

Current position

4AC9E1 is currently broadcasting. Map zoomed to live position.

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
SAS46C Scandinavian Airlines System 6 2026-06-07
SAS2822 - 6 2026-07-11
SAS2821 - 6 2026-07-11
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
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
SAS1916 Scandinavian Airlines System 4 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SAS7762 - Jul 14, 16:20 UTCJul 14, 18:15 UTC1h 55m
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
2026-07-13 SAS58E - Jul 13, 07:05 UTCJul 13, 08:01 UTC55m
2026-07-13 SAS54C ARN → CPH Jul 13, 05:15 UTCJul 13, 06:05 UTC50m
2026-07-12 SAS1424 CPH → ARN Jul 12, 13:25 UTCJul 12, 14:10 UTC45m
2026-07-12 SAS7754 - Jul 12, 08:10 UTCJul 12, 10:45 UTC2h 35m
2026-07-12 SAS7753 - Jul 12, 04:35 UTCJul 12, 07:05 UTC2h 30m
2026-07-11 SAS2822 - Jul 11, 19:55 UTCJul 11, 23:20 UTC3h 25m
2026-07-11 SAS2821 - Jul 11, 14:40 UTCJul 11, 17:55 UTC3h 15m
2026-07-11 SAS7774 - Jul 11, 10:25 UTCJul 11, 13:35 UTC3h 10m
2026-07-11 SAS7773 - Jul 11, 05:25 UTCJul 11, 08:20 UTC2h 55m
2026-07-10 SAS7562 - Jul 10, 16:45 UTCJul 10, 20:25 UTC3h 40m
2026-07-10 SAS7561 - Jul 10, 12:40 UTCJul 10, 15:45 UTC3h 5m
2026-07-10 SAS7598 - Jul 10, 07:50 UTCJul 10, 10:25 UTC2h 35m
2026-07-10 SAS7597 - Jul 10, 04:15 UTCJul 10, 06:25 UTC2h 10m
2026-07-09 SAS2495 - Jul 9, 13:30 UTCJul 9, 15:15 UTC1h 45m
2026-07-09 SAS2494 - Jul 9, 10:25 UTCJul 9, 12:25 UTC2h 0m
2026-07-09 SAS2865 BGO → CPH Jul 9, 08:30 UTCJul 9, 09:30 UTC1h 0m
2026-07-09 SAS2862 CPH → BGO Jul 9, 06:25 UTCJul 9, 07:35 UTC1h 10m
2026-07-08 SAS53T - Jul 8, 09:45 UTCJul 8, 13:45 UTC4h 0m
2026-07-08 SAS22H ARN → CPH Jul 8, 07:05 UTCJul 8, 07:55 UTC50m
2026-07-08 SAS44D - Jul 8, 05:10 UTCJul 8, 06:10 UTC1h 0m
2026-07-07 SAS66Z FAO → CPH Jul 7, 16:15 UTCJul 7, 19:45 UTC3h 30m
2026-07-07 SAS23N - Jul 7, 11:45 UTCJul 7, 15:05 UTC3h 20m
2026-07-07 SAS7598 - Jul 7, 07:15 UTCJul 7, 09:55 UTC2h 40m
2026-07-07 SAS7597 CPH → BOJ Jul 7, 03:50 UTCJul 7, 06:10 UTC2h 20m
2026-07-06 SAS30T - Jul 6, 18:15 UTCJul 6, 21:00 UTC2h 45m
2026-07-06 SAS96C - Jul 6, 14:20 UTCJul 6, 16:50 UTC2h 30m
2026-07-06 SAS62L AMS → CPH Jul 6, 08:40 UTCJul 6, 09:45 UTC1h 5m
2026-07-06 SAS2551 - Jul 6, 06:25 UTCJul 6, 07:30 UTC1h 5m
2026-07-05 SAS2978 ALC → CPH Jul 5, 18:00 UTCJul 5, 21:05 UTC3h 5m
2026-07-05 SAS2977 - Jul 5, 13:55 UTCJul 5, 16:50 UTC2h 55m
2026-07-05 SAS2822 - Jul 5, 08:30 UTCJul 5, 12:05 UTC3h 35m
2026-07-05 SAS2821 - Jul 5, 04:20 UTCJul 5, 07:30 UTC3h 10m
2026-07-04 SAS2822 - Jul 4, 18:45 UTCJul 4, 22:30 UTC3h 45m
2026-07-04 SAS2821 - Jul 4, 14:35 UTCJul 4, 17:45 UTC3h 10m
2026-07-04 SAS87F OSL → CPH Jul 4, 11:50 UTCJul 4, 12:35 UTC45m
2026-07-04 SAS50G - Jul 4, 10:00 UTCJul 4, 10:50 UTC50m
2026-07-04 SAS43C OSL → CPH Jul 4, 08:05 UTCJul 4, 08:55 UTC50m
2026-07-04 SAS52L - Jul 4, 06:20 UTCJul 4, 07:10 UTC50m
2026-07-04 SAS73A - Jul 4, 04:05 UTCJul 4, 04:55 UTC50m
2026-07-03 SAS32T CPH → OSL Jul 3, 16:00 UTCJul 3, 16:55 UTC55m
2026-07-03 SAS242F OSL → CPH Jul 3, 13:35 UTCJul 3, 14:30 UTC55m
2026-07-03 SAS4704 NCE → OSL Jul 3, 08:40 UTCJul 3, 11:25 UTC2h 45m
2026-07-03 SAS4703 OSL → NCE Jul 3, 04:50 UTCJul 3, 07:15 UTC2h 25m

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?
Yes. Mode-S 4AC9E1 is currently airborne.
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 SAS46C, SAS2822, SAS2821, SAS010, SAS2678.