Apparatus

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sensors Mode-S transponder

4AC9D4

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RNT · BOMBARDIER BD-100 Challenger 350

Hex
4AC9D4
Octal
22544724
Decimal
4,901,332
Country
SE
Tail
SE-RNT
Type
CL35
No current signal · last broadcast 5h ago
Flights observed
77
Distinct callsigns
20
Country
SE
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 4AC9D4.

Country allocation

The ICAO 24-bit address 4AC9D4 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
EUW5024 - 6 2026-05-31
EUW2327 - 5 2026-04-25
EUW9791 - 4 2026-05-22
EUW5019 - 4 2026-05-27
EUW5002 - 4 2026-05-13
EUW2317 - 4 2026-04-16
EUW2302 - 4 2026-04-22
EUW9931 - 3 2026-05-05
EUW9876 - 3 2026-05-08
EUW5496 - 3 2026-05-10
EUW5492 - 3 2026-05-08
EUW5011 - 3 2026-05-19
EUW2305 - 3 2026-05-28
EUW9981 - 2 2026-06-01
EUW5010 - 2 2026-05-17
EUW5003 - 2 2026-05-14
EUW4065 - 2 2026-06-02
EUW3537 - 2 2026-05-21
EUW3535 - 2 2026-04-28
EUW2329 - 2 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 EUW4065 - Jun 2, 13:05 UTCJun 2, 14:10 UTC1h 5m
2026-06-02 EUW4065 - Jun 2, 07:10 UTCJun 2, 08:20 UTC1h 10m
2026-06-01 EUW9981 - Jun 1, 09:00 UTCJun 1, 09:25 UTC25m
2026-05-31 EUW9981 - May 31, 15:20 UTCMay 31, 16:45 UTC1h 25m
2026-05-31 EUW5024 ZRH → LBG May 31, 12:55 UTCMay 31, 13:50 UTC55m
2026-05-31 EUW5024 - May 31, 10:05 UTCMay 31, 11:00 UTC55m
2026-05-31 EUW5024 - May 31, 08:25 UTCMay 31, 08:55 UTC30m
2026-05-30 EUW5024 EDI → FRA May 30, 09:35 UTCMay 30, 11:05 UTC1h 30m
2026-05-30 EUW5024 - May 30, 06:45 UTCMay 30, 08:05 UTC1h 20m
2026-05-28 EUW5024 - May 28, 16:20 UTCMay 28, 17:20 UTC1h 0m
2026-05-28 EUW2305 - May 28, 14:30 UTCMay 28, 15:35 UTC1h 5m
2026-05-27 EUW2305 - May 27, 15:30 UTCMay 27, 16:15 UTC45m
2026-05-27 EUW5019 - May 27, 11:25 UTCMay 27, 12:15 UTC50m
2026-05-26 EUW5019 - May 26, 18:55 UTCMay 26, 19:50 UTC55m
2026-05-26 EUW5019 - May 26, 13:19 UTCMay 26, 14:09 UTC50m
2026-05-26 EUW5019 BMA → CPH May 26, 10:50 UTCMay 26, 11:39 UTC50m
2026-05-25 EUW2305 - May 25, 08:25 UTCMay 25, 09:05 UTC40m
2026-05-22 EUW9791 - May 22, 17:20 UTCMay 22, 17:45 UTC25m
2026-05-22 EUW9791 - May 22, 15:25 UTCMay 22, 16:45 UTC1h 20m
2026-05-22 EUW9791 - May 22, 12:45 UTCMay 22, 14:20 UTC1h 35m
2026-05-21 EUW3537 - May 21, 17:25 UTCMay 21, 18:00 UTC35m
2026-05-21 EUW3537 - May 21, 06:10 UTCMay 21, 06:45 UTC35m
2026-05-20 EUW2329 - May 20, 14:20 UTCMay 20, 14:40 UTC20m
2026-05-20 EUW2329 - May 20, 06:40 UTCMay 20, 07:00 UTC20m
2026-05-19 EUW5011 - May 19, 12:20 UTCMay 19, 13:25 UTC1h 5m
2026-05-18 EUW5011 ORK → DUS May 18, 13:05 UTCMay 18, 14:30 UTC1h 25m
2026-05-18 EUW5011 EDI → ORK May 18, 10:35 UTCMay 18, 11:30 UTC55m
2026-05-18 EUW9791 - May 18, 07:55 UTCMay 18, 09:25 UTC1h 30m
2026-05-18 EUW9960 - May 18, 04:51 UTCMay 18, 07:05 UTC2h 15m
2026-05-17 EUW5010 - May 17, 10:05 UTCMay 17, 10:45 UTC40m
2026-05-17 EUW5010 LBG → OPO May 17, 07:05 UTCMay 17, 08:50 UTC1h 45m
2026-05-14 EUW5003 OPO → LBG May 14, 06:15 UTCMay 14, 08:05 UTC1h 50m
2026-05-14 EUW5003 - May 14, 04:10 UTCMay 14, 05:10 UTC1h 0m
2026-05-13 EUW5002 - May 13, 13:10 UTCMay 13, 15:25 UTC2h 15m
2026-05-13 EUW5002 - May 13, 10:15 UTCMay 13, 11:00 UTC45m
2026-05-13 EUW5002 BMA → LBG May 13, 06:50 UTCMay 13, 09:05 UTC2h 15m
2026-05-12 EUW5002 - May 12, 13:00 UTCMay 12, 13:40 UTC40m
2026-05-11 EUW2322 BMA → GOT May 11, 15:45 UTCMay 11, 16:25 UTC40m
2026-05-11 EUW2322 - May 11, 08:50 UTCMay 11, 09:30 UTC40m
2026-05-10 EUW5496 - May 10, 22:15 UTCMay 10, 23:39 UTC1h 25m
2026-05-10 EUW5496 BMA → LTN May 10, 19:30 UTCMay 10, 21:35 UTC2h 5m
2026-05-10 EUW5496 - May 10, 17:20 UTCMay 10, 17:55 UTC35m
2026-05-10 EUW2306 - May 10, 07:19 UTCMay 10, 08:00 UTC40m
2026-05-09 EUW2306 - May 9, 13:50 UTCMay 9, 14:30 UTC40m
2026-05-08 EUW9876 - May 8, 10:49 UTCMay 8, 11:25 UTC35m
2026-05-08 EUW9876 JMK → ARN May 8, 06:30 UTCMay 8, 09:59 UTC3h 30m
2026-05-08 EUW5492 ATH → JMK May 8, 05:09 UTCMay 8, 05:29 UTC20m
2026-05-07 EUW5492 - May 7, 09:40 UTCMay 7, 11:10 UTC1h 30m
2026-05-06 EUW5492 - May 6, 10:50 UTCMay 6, 11:55 UTC1h 5m
2026-05-06 EUW9876 ARN → JMK May 6, 06:20 UTCMay 6, 09:35 UTC3h 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-RNT page for operator, model, and routing details .

Mode-S 4AC9D4 frequently asked

What is Mode-S code 4AC9D4?
4AC9D4 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RNT.
Where is Mode-S 4AC9D4 registered?
Mode-S code 4AC9D4 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4AC9D4 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4AC9D4, octal 22544724, decimal 4,901,332.
What flights does 4AC9D4 operate?
Mode-S 4AC9D4 has broadcast 20 distinct callsigns, including EUW5024, EUW2327, EUW9791, EUW5019, EUW5002.