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sensors Mode-S transponder

4A91F9

ICAO 24-bit transponder address · allocated to Sweden

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

Hex
4A91F9
Octal
22510771
Decimal
4,887,033
Country
SE
Tail
SE-DOY
Type
A20N
No current signal · last broadcast 4h ago
Flights observed
442
Distinct callsigns
20
Country
SE
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 4A91F9.

Country allocation

The ICAO 24-bit address 4A91F9 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 - 10 2026-07-09
SAS2821 - 9 2026-07-09
SAS53C - 6 2026-07-13
SAS2773 Scandinavian Airlines System 6 2026-06-01
SAS89A - 5 2026-06-18
SAS49L Scandinavian Airlines System 5 2026-05-05
SAS44D - 5 2026-07-01
SAS2551 Scandinavian Airlines System 5 2026-06-05
SAS22H - 5 2026-07-01
SAS72C Scandinavian Airlines System 4 2026-06-14
SAS62L Scandinavian Airlines System 4 2026-06-05
SAS44G Scandinavian Airlines System 4 2026-06-10
SAS4304 Scandinavian Airlines System 4 2026-05-28
SAS4303 Scandinavian Airlines System 4 2026-05-28
SAS409 - 4 2026-06-18
SAS34L Scandinavian Airlines System 4 2026-06-10
SAS1553 - 4 2026-06-14
SAS1424 Scandinavian Airlines System 4 2026-06-14
SAS92U - 3 2026-06-29
SAS87Y Scandinavian Airlines System 3 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SAS7562 - Jul 14, 19:20 UTCJul 14, 22:50 UTC3h 29m
2026-07-14 SAS7561 - Jul 14, 14:50 UTCJul 14, 18:05 UTC3h 15m
2026-07-14 SAS7434 RHO → CPH Jul 14, 10:05 UTCJul 14, 13:30 UTC3h 25m
2026-07-14 SAS7433 CPH → RHO Jul 14, 05:15 UTCJul 14, 08:30 UTC3h 15m
2026-07-13 SAS2782 BOD → CPH Jul 13, 17:35 UTCJul 13, 19:35 UTC2h 0m
2026-07-13 SAS2781 CPH → BOD Jul 13, 14:15 UTCJul 13, 16:35 UTC2h 20m
2026-07-13 SAS53C ARN → CPH Jul 13, 12:00 UTCJul 13, 13:00 UTC1h 0m
2026-07-13 SAS76H MAN → ARN Jul 13, 09:05 UTCJul 13, 11:10 UTC2h 5m
2026-07-13 SAS61E ARN → MAN Jul 13, 05:31 UTCJul 13, 07:40 UTC2h 10m
2026-07-12 SAS898 BGO → ARN Jul 12, 08:35 UTCJul 12, 09:40 UTC1h 5m
2026-07-12 SAS96X ARN → BGO Jul 12, 06:35 UTCJul 12, 07:40 UTC1h 5m
2026-07-11 SAS1430 CPH → ARN Jul 11, 17:30 UTCJul 11, 18:20 UTC50m
2026-07-11 SAS1562 MRS → CPH Jul 11, 13:00 UTCJul 11, 15:15 UTC2h 15m
2026-07-10 SAS1561 - Jul 10, 13:30 UTCJul 10, 15:45 UTC2h 15m
2026-07-10 SAS41K ARN → CPH Jul 10, 08:05 UTCJul 10, 08:55 UTC50m
2026-07-10 SAS46M CPH → ARN Jul 10, 06:15 UTCJul 10, 07:10 UTC55m
2026-07-09 SAS2822 - Jul 9, 17:05 UTCJul 9, 20:35 UTC3h 30m
2026-07-09 SAS2821 - Jul 9, 13:05 UTCJul 9, 16:05 UTC3h 0m
2026-07-09 SAS1467 OSL → CPH Jul 9, 09:10 UTCJul 9, 09:55 UTC45m
2026-07-09 SAS52L CPH → OSL Jul 9, 06:15 UTCJul 9, 07:10 UTC55m
2026-07-09 SAS73A - Jul 9, 04:10 UTCJul 9, 05:00 UTC50m
2026-07-08 SAS1474 CPH → OSL Jul 8, 21:25 UTCJul 8, 22:25 UTC1h 0m
2026-07-07 SAS10E VCE → CPH Jul 7, 18:45 UTCJul 7, 20:55 UTC2h 10m
2026-07-07 SAS31T CPH → VCE Jul 7, 15:55 UTCJul 7, 17:35 UTC1h 40m
2026-07-07 SAS2676 - Jul 7, 10:05 UTCJul 7, 12:25 UTC2h 20m
2026-07-07 SAS2675 - Jul 7, 06:20 UTCJul 7, 08:10 UTC1h 50m
2026-07-06 SAS2822 - Jul 6, 16:40 UTCJul 6, 20:20 UTC3h 40m
2026-07-06 SAS2821 - Jul 6, 12:25 UTCJul 6, 15:40 UTC3h 15m
2026-07-06 SAS780 BUD → CPH Jul 6, 08:35 UTCJul 6, 10:10 UTC1h 35m
2026-07-06 SAS779 CPH → BUD Jul 6, 06:05 UTCJul 6, 07:30 UTC1h 25m
2026-07-05 SAS698 - Jul 5, 17:55 UTCJul 5, 19:50 UTC1h 55m
2026-07-05 SAS697 - Jul 5, 14:45 UTCJul 5, 16:35 UTC1h 50m
2026-07-05 SAS7772 - Jul 5, 09:30 UTCJul 5, 13:05 UTC3h 35m
2026-07-05 SAS75C - Jul 5, 05:20 UTCJul 5, 08:10 UTC2h 50m
2026-07-04 SAS2768 - Jul 4, 16:35 UTCJul 4, 19:40 UTC3h 5m
2026-07-04 SAS44A - Jul 4, 12:35 UTCJul 4, 15:25 UTC2h 50m
2026-07-04 SAS7702 - Jul 4, 08:45 UTCJul 4, 11:35 UTC2h 50m
2026-07-04 SAS7701 - Jul 4, 04:35 UTCJul 4, 07:00 UTC2h 25m
2026-07-03 SAS1910 - Jul 3, 18:50 UTCJul 3, 21:15 UTC2h 25m
2026-07-03 SAS1909 - Jul 3, 15:10 UTCJul 3, 17:30 UTC2h 20m
2026-07-03 SAS2768 MLA → CPH Jul 3, 11:10 UTCJul 3, 14:15 UTC3h 5m
2026-07-03 SAS44A - Jul 3, 07:00 UTCJul 3, 10:05 UTC3h 5m
2026-07-02 SAS2788 - Jul 2, 17:00 UTCJul 2, 18:50 UTC1h 50m
2026-07-02 SAS2787 - Jul 2, 14:05 UTCJul 2, 15:40 UTC1h 35m
2026-07-02 SAS7762 - Jul 2, 08:30 UTCJul 2, 11:55 UTC3h 25m
2026-07-02 SAS7761 CPH → AYT Jul 2, 03:40 UTCJul 2, 07:05 UTC3h 25m
2026-07-01 SAS2822 - Jul 1, 17:40 UTCJul 1, 21:00 UTC3h 20m
2026-07-01 SAS2821 - Jul 1, 13:10 UTCJul 1, 16:40 UTC3h 30m
2026-07-01 SAS22H ARN → CPH Jul 1, 07:05 UTCJul 1, 08:10 UTC1h 5m
2026-07-01 SAS44D CPH → ARN Jul 1, 05:15 UTCJul 1, 06:05 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-DOY page for operator, model, and routing details .

Mode-S 4A91F9 frequently asked

What is Mode-S code 4A91F9?
4A91F9 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-DOY.
Where is Mode-S 4A91F9 registered?
Mode-S code 4A91F9 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4A91F9 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4A91F9, octal 22510771, decimal 4,887,033.
What flights does 4A91F9 operate?
Mode-S 4A91F9 has broadcast 20 distinct callsigns, including SAS2822, SAS2821, SAS53C, SAS2773, SAS89A.