Apparatus

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sensors Mode-S transponder

4ACA8C

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RTL · BOEING 737 MAX 8

Hex
4ACA8C
Octal
22545214
Decimal
4,901,516
Country
SE
Tail
SE-RTL
Type
B38M
No current signal · last broadcast Jul 26, 20:30 UTC
Flights observed
519
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 20:30 UTC

Last known position

Most recent position reported by Mode-S 4ACA8C.

Country allocation

The ICAO 24-bit address 4ACA8C 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
NSZ5NE - 8 2026-07-17
NSZ56J - 8 2026-07-17
NSZ2621 Norwegian Air Sweden AOC 6 2026-04-26
NSZ2620 Norwegian Air Sweden AOC 6 2026-04-26
NOZ5KH - 6 2026-06-19
NOZ4RP - 6 2026-06-19
NSZ6BG Norwegian Air Sweden AOC 5 2026-07-21
NSZ5714 Norwegian Air Sweden AOC 5 2026-07-25
NSZ5712 Norwegian Air Sweden AOC 5 2026-07-19
NSZ5700 Norwegian Air Sweden AOC 5 2026-07-26
NSZ4KR Norwegian Air Sweden AOC 5 2026-07-23
NSZ2613 Norwegian Air Sweden AOC 5 2026-04-27
NOZ9KP Norwegian Air Shuttle AOC AS 5 2026-06-11
NOZ8EN - 5 2026-06-10
NOZ383 - 5 2026-06-19
NOZ30BF Norwegian Air Shuttle AOC AS 5 2026-06-11
NOZ1349 Norwegian Air Shuttle AOC AS 5 2026-06-10
NSZ35A - 4 2026-07-12
NOZ436 Norwegian Air Shuttle AOC AS 4 2026-06-11
NOZ378 - 4 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 NSZ46M LLA → ARN Jul 26, 19:25 UTCJul 26, 20:25 UTC1h 0m
2026-07-26 NSZ7DP ARN → LLA Jul 26, 17:45 UTCJul 26, 18:40 UTC55m
2026-07-26 NSZ44L LLA → ARN Jul 26, 15:55 UTCJul 26, 16:55 UTC1h 0m
2026-07-26 NSZ43E ARN → LLA Jul 26, 14:00 UTCJul 26, 15:00 UTC1h 0m
2026-07-26 NSZ5700 LPA → ARN Jul 26, 07:10 UTCJul 26, 12:30 UTC5h 20m
2026-07-25 NSZ5715 CPH → LPA Jul 25, 15:25 UTCJul 25, 19:55 UTC4h 30m
2026-07-25 NSZ5714 LPA → CPH Jul 25, 10:05 UTCJul 25, 14:20 UTC4h 15m
2026-07-24 NSZ5721 BLL → OSL Jul 24, 14:00 UTCJul 24, 18:40 UTC4h 40m
2026-07-24 NSZ5720 OSL → BLL Jul 24, 08:25 UTCJul 24, 12:45 UTC4h 20m
2026-07-23 NSZ4KR ARN → LPA Jul 23, 14:15 UTCJul 23, 19:15 UTC5h 0m
2026-07-23 NSZ5700 LPA → ARN Jul 23, 07:20 UTCJul 23, 12:50 UTC5h 30m
2026-07-22 NSZ5715 CPH → LPA Jul 22, 15:30 UTCJul 22, 20:05 UTC4h 35m
2026-07-22 NSZ5714 LPA → CPH Jul 22, 11:25 UTCJul 22, 14:25 UTC3h 0m
2026-07-21 NSZ6BG OSL → LPA Jul 21, 15:20 UTCJul 21, 20:10 UTC4h 50m
2026-07-21 NSZ5708 LPA → OSL Jul 21, 08:20 UTCJul 21, 13:10 UTC4h 50m
2026-07-20 NSZ5713 BGO → LPA Jul 20, 14:20 UTCJul 20, 19:00 UTC4h 40m
2026-07-19 NSZ5712 LPA → BGO Jul 19, 19:05 UTCJul 20, 13:10 UTC18h 5m
2026-07-19 NSZ5712 LPA → BGO Jul 19, 17:05 UTCJul 20, 13:10 UTC20h 5m
2026-07-19 NSZ5712 LPA → BGO Jul 19, 15:05 UTCJul 20, 13:10 UTC22h 5m
2026-07-19 NSZ4KR - Jul 19, 14:00 UTCJul 20, 13:00 UTC23h 0m
2026-07-19 NSZ2NJ BCN → ARN Jul 19, 09:50 UTCJul 19, 12:55 UTC3h 5m
2026-07-19 NSZ4251 ARN → BCN Jul 19, 05:05 UTCJul 19, 08:15 UTC3h 10m
2026-07-18 NSZ6MJ FAO → ARN Jul 18, 18:35 UTCJul 18, 22:20 UTC3h 45m
2026-07-18 NSZ75Z ARN → FAO Jul 18, 13:05 UTCJul 18, 17:15 UTC4h 10m
2026-07-18 NSZ6YF SPU → ARN Jul 18, 09:35 UTCJul 18, 11:35 UTC2h 0m
2026-07-18 NSZ5PK ARN → SPU Jul 18, 05:45 UTCJul 18, 08:00 UTC2h 15m
2026-07-17 NSZ24N - Jul 17, 20:20 UTCJul 17, 22:49 UTC2h 30m
2026-07-17 NSZ3YL ARN → NCE Jul 17, 15:55 UTCJul 17, 18:50 UTC2h 55m
2026-07-17 NSZ4092 - Jul 17, 14:20 UTCJul 17, 14:44 UTC25m
2026-07-17 NSZ4091 ARN → VBY Jul 17, 13:10 UTCJul 17, 13:29 UTC20m
2026-07-17 NSZ56J - Jul 17, 09:40 UTCJul 17, 12:15 UTC2h 35m
2026-07-17 NSZ5NE - Jul 17, 05:15 UTCJul 17, 08:10 UTC2h 55m
2026-07-16 NSZ278Y LIS → ARN Jul 16, 21:45 UTCJul 17, 01:20 UTC3h 35m
2026-07-16 NSZ2WK ARN → LIS Jul 16, 13:34 UTCJul 16, 17:30 UTC3h 55m
2026-07-16 NSZ56J - Jul 16, 09:45 UTCJul 16, 12:25 UTC2h 40m
2026-07-16 NSZ5NE - Jul 16, 05:30 UTCJul 16, 08:10 UTC2h 40m
2026-07-15 NSZ4MF BCN → ARN Jul 15, 19:20 UTCJul 15, 22:30 UTC3h 10m
2026-07-15 NSZ3MB ARN → BCN Jul 15, 14:50 UTCJul 15, 18:05 UTC3h 15m
2026-07-15 NSZ48U BUD → ARN Jul 15, 11:05 UTCJul 15, 13:00 UTC1h 55m
2026-07-15 NSZ87C ARN → BUD Jul 15, 08:20 UTCJul 15, 10:10 UTC1h 50m
2026-07-14 NSZ4352 - Jul 14, 21:35 UTCJul 15, 00:10 UTC2h 34m
2026-07-14 NSZ4351 - Jul 14, 17:35 UTCJul 14, 20:10 UTC2h 35m
2026-07-14 NSZ4508 BER → ARN Jul 14, 15:15 UTCJul 14, 16:25 UTC1h 10m
2026-07-14 NSZ4507 ARN → BER Jul 14, 13:05 UTCJul 14, 14:20 UTC1h 15m
2026-07-14 NSZ4362 - Jul 14, 09:20 UTCJul 14, 12:10 UTC2h 50m
2026-07-14 NSZ3AM - Jul 14, 04:50 UTCJul 14, 07:35 UTC2h 45m
2026-07-13 NSZ60X LGW → ARN Jul 13, 19:45 UTCJul 13, 21:55 UTC2h 10m
2026-07-13 NSZ59T ARN → LGW Jul 13, 16:15 UTCJul 13, 18:30 UTC2h 15m
2026-07-13 NSZ6LA LGW → ARN Jul 13, 12:50 UTCJul 13, 14:55 UTC2h 5m
2026-07-13 NSZ5WU ARN → LGW Jul 13, 09:05 UTCJul 13, 11:30 UTC2h 25m

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

Mode-S 4ACA8C frequently asked

What is Mode-S code 4ACA8C?
4ACA8C is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RTL.
Where is Mode-S 4ACA8C registered?
Mode-S code 4ACA8C is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACA8C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACA8C, octal 22545214, decimal 4,901,516.
What flights does 4ACA8C operate?
Mode-S 4ACA8C has broadcast 20 distinct callsigns, including NSZ5NE, NSZ56J, NSZ2621, NSZ2620, NOZ5KH.