Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4ACAC1

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RVA · PILATUS PC-24

Hex
4ACAC1
Octal
22545301
Decimal
4,901,569
Country
SE
Tail
SE-RVA
Type
PC24
No current signal · last broadcast 1h ago
Flights observed
277
Distinct callsigns
20
Country
SE
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4ACAC1.

Country allocation

The ICAO 24-bit address 4ACAC1 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
SWE11U - 44 2026-07-14
SWE12U - 39 2026-07-14
SWE13U - 29 2026-07-13
SWE21V - 22 2026-07-08
SWE22V - 21 2026-07-08
SWE14U - 16 2026-07-13
SWE01W - 14 2026-06-27
SWE02W - 12 2026-06-25
SWE23V - 11 2026-07-08
SWE15U - 11 2026-07-13
SWE24V - 10 2026-07-08
SWE25V - 6 2026-07-08
SWE16U - 6 2026-07-03
SWE17U - 5 2026-07-03
SWE03W - 4 2026-06-22
SWE71U - 3 2026-07-07
SWE41B - 3 2026-04-17
SWE26V - 3 2026-06-29
SWE72U - 2 2026-07-07
SWE42B - 2 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWE12U - Jul 14, 08:55 UTCJul 14, 09:35 UTC40m
2026-07-14 SWE11U - Jul 14, 06:55 UTCJul 14, 07:10 UTC15m
2026-07-13 SWE15U - Jul 13, 12:30 UTCJul 13, 13:00 UTC30m
2026-07-13 SWE14U ARN → OSD Jul 13, 11:10 UTCJul 13, 12:00 UTC50m
2026-07-13 SWE13U - Jul 13, 08:45 UTCJul 13, 09:30 UTC45m
2026-07-13 SWE12U - Jul 13, 07:50 UTCJul 13, 08:10 UTC20m
2026-07-13 SWE11U - Jul 13, 06:50 UTCJul 13, 07:15 UTC25m
2026-07-08 SWE25V - Jul 8, 17:15 UTCJul 8, 17:45 UTC30m
2026-07-08 SWE24V - Jul 8, 16:25 UTCJul 8, 16:55 UTC30m
2026-07-08 SWE23V - Jul 8, 13:35 UTCJul 8, 13:55 UTC20m
2026-07-08 SWE22V - Jul 8, 12:45 UTCJul 8, 13:00 UTC15m
2026-07-08 SWE21V - Jul 8, 11:35 UTCJul 8, 12:05 UTC30m
2026-07-07 SWE14U - Jul 7, 16:30 UTCJul 7, 16:50 UTC20m
2026-07-07 SWE13U - Jul 7, 14:20 UTCJul 7, 15:55 UTC1h 35m
2026-07-07 SWE72U - Jul 7, 13:10 UTCJul 7, 13:45 UTC35m
2026-07-07 SWE71U - Jul 7, 11:20 UTCJul 7, 12:20 UTC1h 0m
2026-07-07 SWE12U - Jul 7, 09:05 UTCJul 7, 09:30 UTC25m
2026-07-07 SWE11U - Jul 7, 07:20 UTCJul 7, 08:25 UTC1h 5m
2026-07-06 SWE22V - Jul 6, 11:20 UTCJul 6, 12:00 UTC40m
2026-07-06 SWE21V - Jul 6, 09:55 UTCJul 6, 10:40 UTC45m
2026-07-04 SWE12U - Jul 4, 16:00 UTCJul 4, 16:30 UTC30m
2026-07-04 SWE11U - Jul 4, 14:55 UTCJul 4, 15:20 UTC25m
2026-07-03 SWE17U - Jul 3, 15:40 UTCJul 3, 16:00 UTC20m
2026-07-03 SWE16U - Jul 3, 14:50 UTCJul 3, 15:05 UTC15m
2026-07-03 SWE15U - Jul 3, 13:40 UTCJul 3, 13:55 UTC15m
2026-07-03 SWE14U - Jul 3, 12:40 UTCJul 3, 13:05 UTC25m
2026-07-03 SWE13U - Jul 3, 10:20 UTCJul 3, 10:40 UTC20m
2026-07-03 SWE12U - Jul 3, 08:25 UTCJul 3, 09:35 UTC1h 10m
2026-07-03 SWE11U - Jul 3, 06:50 UTCJul 3, 07:45 UTC55m
2026-07-01 SWE17U - Jul 1, 11:00 UTCJul 1, 11:40 UTC40m
2026-07-01 SWE13U - Jul 1, 10:10 UTCJul 1, 10:20 UTC10m
2026-07-01 SWE12U - Jul 1, 08:35 UTCJul 1, 09:30 UTC55m
2026-07-01 SWE11U - Jul 1, 07:20 UTCJul 1, 08:00 UTC40m
2026-06-30 SWE22V - Jun 30, 17:10 UTCJun 30, 17:35 UTC25m
2026-06-30 SWE21V - Jun 30, 16:15 UTCJun 30, 16:50 UTC35m
2026-06-29 SWE27V - Jun 29, 20:15 UTCJun 29, 20:54 UTC40m
2026-06-29 SWE26V - Jun 29, 18:34 UTCJun 29, 19:35 UTC1h 0m
2026-06-29 SWE25V - Jun 29, 17:05 UTCJun 29, 17:14 UTC10m
2026-06-29 SWE14U - Jun 29, 12:05 UTCJun 29, 12:49 UTC45m
2026-06-29 SWE13U - Jun 29, 09:05 UTCJun 29, 09:54 UTC50m
2026-06-29 SWE12U - Jun 29, 07:50 UTCJun 29, 08:14 UTC25m
2026-06-29 SWE11U - Jun 29, 06:50 UTCJun 29, 07:15 UTC25m
2026-06-28 SWE16U - Jun 28, 19:20 UTCJun 28, 19:59 UTC40m
2026-06-28 SWE15U - Jun 28, 17:50 UTCJun 28, 18:40 UTC50m
2026-06-28 SWE14U - Jun 28, 14:39 UTCJun 28, 15:05 UTC25m
2026-06-28 SWE13U - Jun 28, 13:49 UTCJun 28, 14:19 UTC30m
2026-06-27 SWE01W - Jun 27, 23:14 UTCJun 28, 00:25 UTC1h 10m
2026-06-27 SWE14U - Jun 27, 19:29 UTCJun 27, 19:49 UTC20m
2026-06-27 SWE11U - Jun 27, 15:05 UTCJun 27, 15:19 UTC15m
2026-06-26 SWE22V - Jun 26, 15:15 UTCJun 26, 16:30 UTC1h 15m

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

Mode-S 4ACAC1 frequently asked

What is Mode-S code 4ACAC1?
4ACAC1 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RVA.
Where is Mode-S 4ACAC1 registered?
Mode-S code 4ACAC1 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACAC1 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACAC1, octal 22545301, decimal 4,901,569.
What flights does 4ACAC1 operate?
Mode-S 4ACAC1 has broadcast 20 distinct callsigns, including SWE11U, SWE12U, SWE13U, SWE21V, SWE22V.