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sensors Mode-S transponder

4AC9E9

ICAO 24-bit transponder address · allocated to Sweden

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

Hex
4AC9E9
Octal
22544751
Decimal
4,901,353
Country
SE
Tail
SE-ROI
Type
A20N
Broadcasting now · callsign SAS46M · 2,700 ft
Flights observed
518
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 21:05 UTC

Current position

4AC9E9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4AC9E9 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
SAS1430 Scandinavian Airlines System 8 2026-07-21
SAS1429 Scandinavian Airlines System 8 2026-07-21
SAS40G Scandinavian Airlines System 7 2026-07-21
SAS1428 - 7 2026-07-20
SAS64C - 6 2026-06-17
SAS71T - 5 2026-06-17
SAS42E Scandinavian Airlines System 5 2026-07-21
SAS34L Scandinavian Airlines System 5 2026-06-08
SAS2822 - 5 2026-07-10
SAS2821 - 5 2026-07-10
SAS1415 - 5 2026-07-06
SAS87Y Scandinavian Airlines System 4 2026-06-09
SAS71G - 4 2026-07-08
SAS44G Scandinavian Airlines System 4 2026-06-08
SAS44D Scandinavian Airlines System 4 2026-06-08
SAS42R Scandinavian Airlines System 4 2026-06-09
SAS41K - 4 2026-06-29
SAS2774 - 4 2026-06-19
SAS2595 - 4 2026-07-08
SAS22H Scandinavian Airlines System 4 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SAS50L PMI → CPH Jul 26, 18:20 UTCJul 26, 21:00 UTC2h 40m
2026-07-26 SAS40A CPH → PMI Jul 26, 14:20 UTCJul 26, 16:55 UTC2h 35m
2026-07-26 SAS2914 NCE → CPH Jul 26, 10:20 UTCJul 26, 12:20 UTC2h 0m
2026-07-26 SAS2913 CPH → NCE Jul 26, 06:50 UTCJul 26, 08:50 UTC2h 0m
2026-07-26 SAS2861 BGO → CPH Jul 26, 04:00 UTCJul 26, 04:55 UTC55m
2026-07-25 SAS2874 CPH → BGO Jul 25, 21:15 UTCJul 25, 22:20 UTC1h 5m
2026-07-25 SAS2768 MLA → CPH Jul 25, 16:25 UTCJul 25, 19:25 UTC3h 0m
2026-07-25 SAS44A LPA → CPH Jul 25, 12:25 UTCJul 25, 15:10 UTC2h 45m
2026-07-25 SAS65K PMO → CPH Jul 25, 07:55 UTCJul 25, 10:35 UTC2h 40m
2026-07-25 SAS2695 CPH → PMO Jul 25, 04:15 UTCJul 25, 06:40 UTC2h 25m
2026-07-24 SAS7562 SMI → BLL Jul 24, 16:50 UTCJul 24, 20:15 UTC3h 25m
2026-07-24 SAS7561 CPH → GZP Jul 24, 12:40 UTCJul 24, 15:50 UTC3h 10m
2026-07-24 SAS7598 GVA → CPH Jul 24, 07:55 UTCJul 24, 10:25 UTC2h 30m
2026-07-24 SAS7597 BLL → FUE Jul 24, 04:20 UTCJul 24, 06:35 UTC2h 15m
2026-07-23 SAS88P DUB → CPH Jul 23, 19:40 UTCJul 23, 21:20 UTC1h 40m
2026-07-23 SAS85A CPH → DUB Jul 23, 16:35 UTCJul 23, 18:35 UTC2h 0m
2026-07-23 SAS2495 EVE → CPH Jul 23, 13:35 UTCJul 23, 15:10 UTC1h 35m
2026-07-23 SAS2494 CPH → EVE Jul 23, 10:25 UTCJul 23, 12:20 UTC1h 55m
2026-07-23 SAS2832 SPU → CPH Jul 23, 07:20 UTCJul 23, 09:10 UTC1h 50m
2026-07-23 SAS2831 CPH → SPU Jul 23, 04:15 UTCJul 23, 05:45 UTC1h 30m
2026-07-22 SAS39G FLR → CPH Jul 22, 11:30 UTCJul 22, 13:20 UTC1h 50m
2026-07-21 SAS40G ARN → CPH Jul 21, 19:10 UTCJul 21, 20:05 UTC55m
2026-07-21 SAS1430 CPH → ARN Jul 21, 17:10 UTCJul 21, 18:10 UTC1h 0m
2026-07-21 SAS1429 ARN → CPH Jul 21, 15:15 UTCJul 21, 16:10 UTC55m
2026-07-21 SAS42E CPH → ARN Jul 21, 10:05 UTCJul 21, 11:00 UTC55m
2026-07-21 SAS91A ARN → CPH Jul 21, 06:15 UTCJul 21, 07:10 UTC55m
2026-07-20 SAS1428 - Jul 20, 21:20 UTCJul 20, 22:15 UTC55m
2026-07-20 SAS78C LHR → CPH Jul 20, 18:00 UTCJul 20, 19:35 UTC1h 35m
2026-07-20 SAS72G CPH → LHR Jul 20, 15:20 UTCJul 20, 16:50 UTC1h 30m
2026-07-20 SAS1407 ARN → CPH Jul 20, 13:15 UTCJul 20, 14:15 UTC1h 0m
2026-07-20 SAS868 OSL → ARN Jul 20, 10:20 UTCJul 20, 11:05 UTC45m
2026-07-20 SAS849 ARN → OSL Jul 20, 08:40 UTCJul 20, 09:20 UTC40m
2026-07-20 SAS864 OSL → ARN Jul 20, 07:05 UTCJul 20, 07:45 UTC40m
2026-07-19 SAS4734 - Jul 19, 18:05 UTCJul 19, 20:20 UTC2h 15m
2026-07-19 SAS4733 - Jul 19, 14:10 UTCJul 19, 16:20 UTC2h 10m
2026-07-18 SAS4433 TOS → OSL Jul 18, 18:50 UTCJul 18, 20:25 UTC1h 35m
2026-07-18 SAS7356 CHQ → TOS Jul 18, 11:40 UTCJul 18, 16:15 UTC4h 35m
2026-07-18 SAS7313 MOL → CHQ Jul 18, 05:10 UTCJul 18, 09:50 UTC4h 40m
2026-07-17 SAS4126 - Jul 17, 19:45 UTCJul 17, 20:50 UTC1h 5m
2026-07-16 SAS9230 - Jul 16, 09:05 UTCJul 16, 13:10 UTC4h 5m
2026-07-13 SAS7761 - Jul 13, 03:40 UTCJul 13, 07:01 UTC3h 20m
2026-07-12 SAS92U - Jul 12, 17:01 UTCJul 12, 19:35 UTC2h 35m
2026-07-12 SAS581 CPH → MAD Jul 12, 12:35 UTCJul 12, 15:40 UTC3h 5m
2026-07-12 SAS69R - Jul 12, 09:10 UTCJul 12, 11:20 UTC2h 10m
2026-07-12 SAS79U - Jul 12, 05:50 UTCJul 12, 07:50 UTC2h 0m
2026-07-11 SAS7710 - Jul 11, 20:30 UTCJul 11, 23:40 UTC3h 10m
2026-07-11 SAS7709 CPH → CHQ Jul 11, 16:15 UTCJul 11, 19:10 UTC2h 55m
2026-07-11 SAS37L CHQ → CPH Jul 11, 10:55 UTCJul 11, 14:25 UTC3h 30m
2026-07-11 SAS2817 CPH → CHQ Jul 11, 06:40 UTCJul 11, 09:40 UTC3h 0m
2026-07-10 SAS2788 - Jul 10, 17:00 UTCJul 10, 18:50 UTC1h 50m

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

Mode-S 4AC9E9 frequently asked

What is Mode-S code 4AC9E9?
4AC9E9 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-ROI.
Where is Mode-S 4AC9E9 registered?
Mode-S code 4AC9E9 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4AC9E9 broadcasting right now?
Yes. Mode-S 4AC9E9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4AC9E9, octal 22544751, decimal 4,901,353.
What flights does 4AC9E9 operate?
Mode-S 4AC9E9 has broadcast 20 distinct callsigns, including SAS1430, SAS1429, SAS40G, SAS1428, SAS64C.