Apparatus

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sensors Mode-S transponder

4ACAAF

ICAO 24-bit transponder address · allocated to Sweden

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

Hex
4ACAAF
Octal
22545257
Decimal
4,901,551
Country
SE
Tail
SE-RUO
Type
A20N
Broadcasting now · callsign SAS4634 · 37,975 ft
Flights observed
251
Distinct callsigns
20
Country
SE
Last broadcast
8m ago

Current position

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

Country allocation

The ICAO 24-bit address 4ACAAF 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
SAS4083 Scandinavian Airlines System 5 2026-05-30
SAS4082 Scandinavian Airlines System 5 2026-05-30
SAS4079 Scandinavian Airlines System 5 2026-05-15
SAS4098 Scandinavian Airlines System 4 2026-05-14
SAS93L Scandinavian Airlines System 3 2026-05-28
SAS839 Scandinavian Airlines System 3 2026-05-28
SAS73A Scandinavian Airlines System 3 2026-04-26
SAS61G Scandinavian Airlines System 3 2026-05-28
SAS52L Scandinavian Airlines System 3 2026-04-26
SAS4113 Scandinavian Airlines System 3 2026-05-28
SAS4112 Scandinavian Airlines System 3 2026-05-28
SAS4107 Scandinavian Airlines System 3 2026-05-28
SAS361 Scandinavian Airlines System 3 2026-04-28
SAS238 Scandinavian Airlines System 3 2026-05-07
SAS1811 Scandinavian Airlines System 3 2026-04-17
SAS96D Scandinavian Airlines System 2 2026-05-19
SAS91K Scandinavian Airlines System 2 2026-04-20
SAS885 Scandinavian Airlines System 2 2026-05-07
SAS864 - 2 2026-04-13
SAS810 Scandinavian Airlines System 2 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 SAS4634 CHQ → OSL May 30, 15:20 UTCMay 30, 15:45 UTC25m
2026-05-30 SAS4633 OSL → CHQ May 30, 10:30 UTCMay 30, 13:55 UTC3h 25m
2026-05-30 SAS4083 EVE → OSL May 30, 07:30 UTCMay 30, 08:40 UTC1h 10m
2026-05-30 SAS4082 OSL → EVE May 30, 05:10 UTCMay 30, 06:15 UTC1h 5m
2026-05-29 SAS222 KRS → OSL May 29, 17:55 UTCMay 29, 18:30 UTC35m
2026-05-29 SAS221 OSL → KRS May 29, 16:30 UTCMay 29, 17:05 UTC35m
2026-05-29 SAS7376 KGS → OSL May 29, 10:05 UTCMay 29, 14:15 UTC4h 10m
2026-05-29 SAS7375 OSL → KGS May 29, 04:35 UTCMay 29, 08:00 UTC3h 25m
2026-05-28 SAS93L CDG → OSL May 28, 18:45 UTCMay 28, 20:40 UTC1h 55m
2026-05-28 SAS839 OSL → CDG May 28, 15:20 UTCMay 28, 17:15 UTC1h 55m
2026-05-28 SAS4113 BOO → OSL May 28, 13:00 UTCMay 28, 14:05 UTC1h 5m
2026-05-28 SAS4112 OSL → BOO May 28, 11:00 UTCMay 28, 12:15 UTC1h 15m
2026-05-28 SAS4107 BOO → OSL May 28, 08:50 UTCMay 28, 09:55 UTC1h 5m
2026-05-28 SAS61G OSL → BOO May 28, 06:40 UTCMay 28, 07:55 UTC1h 15m
2026-05-27 SAS462 CPH → OSL May 27, 16:05 UTCMay 27, 17:05 UTC1h 0m
2026-05-27 SAS10C OSL → CPH May 27, 14:25 UTCMay 27, 15:10 UTC45m
2026-05-27 SAS71A BOO → OSL May 27, 12:15 UTCMay 27, 13:25 UTC1h 10m
2026-05-27 SAS67B OSL → BOO May 27, 10:00 UTCMay 27, 11:15 UTC1h 15m
2026-05-27 SAS4016 SVG → OSL May 27, 08:05 UTCMay 27, 08:45 UTC40m
2026-05-27 SAS4017 OSL → SVG May 27, 06:34 UTCMay 27, 07:20 UTC46m
2026-05-26 - OSL → OSL May 26, 18:45 UTCMay 26, 18:55 UTC10m
2026-05-26 SAS7081 OSL → OSL May 26, 10:54 UTCMay 26, 17:20 UTC6h 25m
2026-05-26 SAS44Z TOS → OSL May 26, 06:39 UTCMay 26, 08:04 UTC1h 25m
2026-05-25 SAS4434 OSL → TOS May 25, 19:50 UTCMay 25, 19:59 UTC10m
2026-05-25 SAS4434 OSL → TOS May 25, 17:30 UTCMay 25, 18:45 UTC1h 15m
2026-05-25 SAS32T CPH → OSL May 25, 15:10 UTCMay 25, 16:10 UTC1h 0m
2026-05-25 SAS242F OSL → CPH May 25, 13:10 UTCMay 25, 14:00 UTC50m
2026-05-25 SAS1456 CPH → OSL May 25, 11:20 UTCMay 25, 12:15 UTC55m
2026-05-25 SAS1467 OSL → CPH May 25, 09:10 UTCMay 25, 10:05 UTC55m
2026-05-25 SAS83D CPH → OSL May 25, 07:05 UTCMay 25, 08:00 UTC55m
2026-05-25 SAS1463 OSL → CPH May 25, 04:55 UTCMay 25, 05:45 UTC50m
2026-05-24 SAS1475 OSL → CPH May 24, 19:10 UTCMay 24, 20:00 UTC50m
2026-05-24 SAS1470 CPH → OSL May 24, 17:15 UTCMay 24, 18:10 UTC55m
2026-05-24 SAS1465 OSL → CPH May 24, 15:25 UTCMay 24, 16:15 UTC50m
2026-05-24 SAS11M ALC → OSL May 24, 09:30 UTCMay 24, 13:05 UTC3h 35m
2026-05-24 SAS22E FCO → CPH May 24, 04:55 UTCMay 24, 08:15 UTC3h 20m
2026-05-23 SAS37A ALC → OSL May 23, 19:25 UTCMay 23, 22:55 UTC3h 30m
2026-05-23 SAS76F OSL → ALC May 23, 14:40 UTCMay 23, 18:00 UTC3h 20m
2026-05-23 SAS7384 CTA → OSL May 23, 08:30 UTCMay 23, 12:00 UTC3h 30m
2026-05-23 SAS7383 OSL → JSI May 23, 04:10 UTCMay 23, 07:15 UTC3h 5m
2026-05-22 SAS4038 SVG → OSL May 22, 15:05 UTCMay 22, 15:40 UTC35m
2026-05-22 SAS24C OSL → SVG May 22, 13:40 UTCMay 22, 14:20 UTC40m
2026-05-20 SAS810 LHR → OSL May 20, 16:45 UTCMay 20, 18:30 UTC1h 45m
2026-05-20 SAS809 OSL → LHR May 20, 13:10 UTCMay 20, 15:00 UTC1h 50m
2026-05-20 SAS804 LHR → OSL May 20, 10:00 UTCMay 20, 11:45 UTC1h 45m
2026-05-20 SAS53D OSL → LHR May 20, 06:25 UTCMay 20, 08:30 UTC2h 5m
2026-05-19 SAS897 ARN → OSL May 19, 20:15 UTCMay 19, 20:50 UTC35m
2026-05-19 SAS886 OSL → ARN May 19, 18:15 UTCMay 19, 19:05 UTC50m
2026-05-19 SAS4117 BOO → OSL May 19, 15:50 UTCMay 19, 17:05 UTC1h 15m
2026-05-19 SAS96D OSL → BOO May 19, 13:45 UTCMay 19, 14:50 UTC1h 5m

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

Mode-S 4ACAAF frequently asked

What is Mode-S code 4ACAAF?
4ACAAF is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RUO.
Where is Mode-S 4ACAAF registered?
Mode-S code 4ACAAF is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACAAF broadcasting right now?
Yes. Mode-S 4ACAAF is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACAAF, octal 22545257, decimal 4,901,551.
What flights does 4ACAAF operate?
Mode-S 4ACAAF has broadcast 20 distinct callsigns, including SAS4083, SAS4082, SAS4079, SAS4098, SAS93L.