Apparatus

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sensors Mode-S transponder

4ACB04

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RXD · BOEING 737-800

Hex
4ACB04
Octal
22545404
Decimal
4,901,636
Country
SE
Tail
SE-RXD
Type
B738
No current signal · last broadcast 7h ago
Flights observed
285
Distinct callsigns
20
Country
SE
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 4ACB04.

Country allocation

The ICAO 24-bit address 4ACB04 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
NSZ3YT Norwegian Air Sweden AOC 8 2026-05-29
NSZ45F Norwegian Air Sweden AOC 7 2026-05-29
NSZ2MP Norwegian Air Sweden AOC 7 2026-05-29
NSZ46M Norwegian Air Sweden AOC 6 2026-05-29
NSZ44L Norwegian Air Sweden AOC 6 2026-05-29
NSZ43E Norwegian Air Sweden AOC 6 2026-05-29
NSZ4354 Norwegian Air Sweden AOC 6 2026-05-06
NSZ4353 Norwegian Air Sweden AOC 6 2026-05-06
NSZ38K Norwegian Air Sweden AOC 6 2026-05-27
NSZ35A Norwegian Air Sweden AOC 6 2026-05-27
NSZ5NE Norwegian Air Sweden AOC 5 2026-05-24
NSZ56J Norwegian Air Sweden AOC 5 2026-05-24
NSZ49H Norwegian Air Sweden AOC 5 2026-05-29
NSZ4280 Norwegian Air Sweden AOC 5 2026-05-23
NSZ3LW Norwegian Air Sweden AOC 5 2026-05-27
NSZ2EF Norwegian Air Sweden AOC 5 2026-05-28
NSZ2031 Norwegian Air Sweden AOC 5 2026-05-22
NSZ2030 Norwegian Air Sweden AOC 5 2026-05-23
NSZ1KM Norwegian Air Sweden AOC 5 2026-05-27
NSZ13R Norwegian Air Sweden AOC 5 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 NSZ49H ARN → LLA May 29, 19:40 UTCMay 29, 20:40 UTC1h 0m
2026-05-29 NSZ46M LLA → ARN May 29, 17:55 UTCMay 29, 18:55 UTC1h 0m
2026-05-29 NSZ45F ARN → LLA May 29, 16:10 UTCMay 29, 17:10 UTC1h 0m
2026-05-29 NSZ44L LLA → ARN May 29, 14:20 UTCMay 29, 15:20 UTC1h 0m
2026-05-29 NSZ43E ARN → LLA May 29, 12:35 UTCMay 29, 13:35 UTC1h 0m
2026-05-29 NSZ2MP NCE → ARN May 29, 09:10 UTCMay 29, 11:50 UTC2h 40m
2026-05-29 NSZ3YT ARN → NCE May 29, 05:40 UTCMay 29, 08:10 UTC2h 30m
2026-05-28 NSZ48U BUD → ARN May 28, 18:20 UTCMay 28, 20:20 UTC2h 0m
2026-05-28 NSZ87C ARN → BUD May 28, 15:35 UTCMay 28, 17:25 UTC1h 50m
2026-05-28 NSZ4502 MUC → ARN May 28, 12:40 UTCMay 28, 14:40 UTC2h 0m
2026-05-28 NSZ4501 ARN → MUC May 28, 09:35 UTCMay 28, 11:20 UTC1h 45m
2026-05-28 NSZ8GH UME → ARN May 28, 08:10 UTCMay 28, 08:45 UTC35m
2026-05-28 NSZ5B ARN → UME May 28, 06:40 UTCMay 28, 07:20 UTC40m
2026-05-28 NSZ2EF UME → ARN May 28, 04:50 UTCMay 28, 05:35 UTC45m
2026-05-27 NSZ1KM ARN → UME May 27, 19:15 UTCMay 27, 19:50 UTC35m
2026-05-27 NSZ16Z UME → ARN May 27, 17:45 UTCMay 27, 18:30 UTC45m
2026-05-27 NSZ13R ARN → UME May 27, 16:15 UTCMay 27, 16:50 UTC35m
2026-05-27 NSZ12U UME → ARN May 27, 14:45 UTCMay 27, 15:40 UTC55m
2026-05-27 NSZ11N ARN → UME May 27, 12:55 UTCMay 27, 13:25 UTC30m
2026-05-27 NSZ38K LLA → ARN May 27, 08:30 UTCMay 27, 09:35 UTC1h 5m
2026-05-27 NSZ35A ARN → LLA May 27, 06:40 UTCMay 27, 07:35 UTC55m
2026-05-27 NSZ3LW LLA → ARN May 27, 04:49 UTCMay 27, 05:45 UTC55m
2026-05-26 NSZ49H ARN → LLA May 26, 19:34 UTCMay 26, 20:34 UTC1h 0m
2026-05-26 NSZ46M LLA → ARN May 26, 17:44 UTCMay 26, 18:50 UTC1h 5m
2026-05-26 NSZ45F ARN → LLA May 26, 16:05 UTCMay 26, 16:59 UTC55m
2026-05-26 NSZ44L LLA → ARN May 26, 14:09 UTCMay 26, 15:14 UTC1h 5m
2026-05-26 NSZ43E ARN → LLA May 26, 12:14 UTCMay 26, 13:15 UTC1h 0m
2026-05-26 NSZ8937 ARN → ARN May 26, 05:45 UTCMay 26, 08:39 UTC2h 55m
2026-05-25 NSZ4MF BCN → ARN May 25, 18:40 UTCMay 25, 21:49 UTC3h 9m
2026-05-25 NSZ3MB ARN → BCN May 25, 14:05 UTCMay 25, 17:15 UTC3h 10m
2026-05-25 NSZ2ES LGW → ARN May 25, 10:25 UTCMay 25, 12:20 UTC1h 55m
2026-05-25 NSZ51M ARN → LGW May 25, 06:45 UTCMay 25, 09:05 UTC2h 20m
2026-05-25 NSZ3LW LLA → ARN May 25, 04:45 UTCMay 25, 05:45 UTC1h 0m
2026-05-24 NSZ7DP ARN → LLA May 24, 20:20 UTCMay 24, 21:15 UTC55m
2026-05-24 NSZ46M LLA → ARN May 24, 18:40 UTCMay 24, 19:40 UTC1h 0m
2026-05-24 NSZ45F ARN → LLA May 24, 17:00 UTCMay 24, 17:55 UTC55m
2026-05-24 NSZ4042 LLA → ARN May 24, 15:05 UTCMay 24, 16:00 UTC55m
2026-05-24 NSZ4041 ARN → LLA May 24, 13:10 UTCMay 24, 14:10 UTC1h 0m
2026-05-24 NSZ56J FCO → ARN May 24, 09:20 UTCMay 24, 12:20 UTC3h 0m
2026-05-24 NSZ5NE ARN → FCO May 24, 05:00 UTCMay 24, 07:35 UTC2h 35m
2026-05-23 NSZ4280 OPO → ARN May 23, 20:00 UTCMay 23, 23:30 UTC3h 30m
2026-05-23 NSZ4279 ARN → OPO May 23, 15:25 UTCMay 23, 19:05 UTC3h 40m
2026-05-23 NSZ2055 PSA → ARN May 23, 11:50 UTCMay 23, 14:25 UTC2h 35m
2026-05-23 NSZ2054 ARN → ARN May 23, 08:00 UTCMay 23, 10:30 UTC2h 30m
2026-05-23 NSZ2030 RIX → ARN May 23, 04:15 UTCMay 23, 05:10 UTC55m
2026-05-22 NSZ2005 OSL → RIX May 22, 17:35 UTCMay 22, 18:45 UTC1h 10m
2026-05-22 NSZ2004 RIX → OSL May 22, 15:30 UTCMay 22, 16:45 UTC1h 15m
2026-05-22 NSZ2031 ARN → RIX May 22, 13:45 UTCMay 22, 14:30 UTC45m
2026-05-22 NSZ2047 CDG → ARN May 22, 10:50 UTCMay 22, 12:55 UTC2h 5m
2026-05-22 NSZ2046 ARN → CDG May 22, 07:05 UTCMay 22, 09:20 UTC2h 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-RXD page for operator, model, and routing details .

Mode-S 4ACB04 frequently asked

What is Mode-S code 4ACB04?
4ACB04 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RXD.
Where is Mode-S 4ACB04 registered?
Mode-S code 4ACB04 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACB04 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACB04, octal 22545404, decimal 4,901,636.
What flights does 4ACB04 operate?
Mode-S 4ACB04 has broadcast 20 distinct callsigns, including NSZ3YT, NSZ45F, NSZ2MP, NSZ46M, NSZ44L.