Apparatus

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sensors Mode-S transponder

4ACA83

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RTC · BOEING 737 MAX 8

Hex
4ACA83
Octal
22545203
Decimal
4,901,507
Country
SE
Tail
SE-RTC
Type
B38M
No current signal · last broadcast Jul 26, 21:40 UTC
Flights observed
541
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 21:40 UTC

Last known position

Most recent position reported by Mode-S 4ACA83.

Country allocation

The ICAO 24-bit address 4ACA83 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
NSZ6HT - 15 2026-07-17
NSZ2900 - 12 2026-07-10
NSZ83AH - 11 2026-07-14
NSZ4AW - 11 2026-07-14
NSZ2901 - 11 2026-07-10
NSZ2887 - 11 2026-07-16
NSZ2617 - 9 2026-07-12
NSZ2616 - 9 2026-07-12
NSZ2767 - 8 2026-07-16
NSZ2766 - 8 2026-07-16
NSZ6RD - 7 2026-07-05
NSZ56J - 7 2026-07-20
NSZ2613 - 7 2026-07-07
NSZ8GH Norwegian Air Sweden AOC 6 2026-06-08
NSZ5NE Norwegian Air Sweden AOC 6 2026-07-20
NSZ2913 - 6 2026-07-15
NSZ2615 - 6 2026-07-13
NSZ9WP - 5 2026-07-15
NSZ87C Norwegian Air Sweden AOC 5 2026-07-24
NSZ5B Norwegian Air Sweden AOC 5 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 NSZ4378 MXP → ARN Jul 26, 19:15 UTCJul 26, 21:35 UTC2h 20m
2026-07-26 NSZ4377 ARN → MXP Jul 26, 15:30 UTCJul 26, 18:00 UTC2h 30m
2026-07-26 NSZ4514 HAM → ARN Jul 26, 13:00 UTCJul 26, 14:15 UTC1h 15m
2026-07-26 NSZ4513 ARN → HAM Jul 26, 10:55 UTCJul 26, 12:05 UTC1h 10m
2026-07-26 NSZ72N PRG → ARN Jul 26, 08:20 UTCJul 26, 09:45 UTC1h 25m
2026-07-26 NSZ1VD ARN → PRG Jul 26, 05:35 UTCJul 26, 07:10 UTC1h 36m
2026-07-25 NSZ4402 LCA → ARN Jul 25, 18:25 UTCJul 25, 22:30 UTC4h 5m
2026-07-25 NSZ4401 ARN → LCA Jul 25, 13:10 UTCJul 25, 17:00 UTC3h 50m
2026-07-25 NSZ4328 BIA → ARN Jul 25, 09:20 UTCJul 25, 11:55 UTC2h 35m
2026-07-25 NSZ4327 ARN → BIA Jul 25, 05:20 UTCJul 25, 07:55 UTC2h 35m
2026-07-24 NSZ4508 BER → ARN Jul 24, 20:00 UTCJul 24, 21:25 UTC1h 25m
2026-07-24 NSZ4507 ARN → BER Jul 24, 17:55 UTCJul 24, 19:10 UTC1h 15m
2026-07-24 NSZ48U BUD → ARN Jul 24, 15:05 UTCJul 24, 17:05 UTC2h 0m
2026-07-24 NSZ87C ARN → BUD Jul 24, 12:15 UTCJul 24, 14:00 UTC1h 45m
2026-07-24 NSZ4PU LYS → ARN Jul 24, 08:30 UTCJul 24, 11:10 UTC2h 40m
2026-07-24 NSZ4329 ARN → LYS Jul 24, 05:00 UTCJul 24, 07:25 UTC2h 25m
2026-07-23 NSZ8KY FCO → ARN Jul 23, 18:20 UTCJul 23, 21:15 UTC2h 55m
2026-07-23 NSZ4357 ARN → FCO Jul 23, 14:25 UTCJul 23, 16:45 UTC2h 20m
2026-07-23 NSZ2NJ BCN → ARN Jul 23, 09:25 UTCJul 23, 12:35 UTC3h 10m
2026-07-23 NSZ4251 ARN → BCN Jul 23, 05:15 UTCJul 23, 08:10 UTC2h 55m
2026-07-22 NSZ4354 AMS → ARN Jul 22, 19:55 UTCJul 22, 21:40 UTC1h 45m
2026-07-22 NSZ4353 ARN → AMS Jul 22, 17:10 UTCJul 22, 18:45 UTC1h 35m
2026-07-22 NSZ44L LLA → ARN Jul 22, 15:10 UTCJul 22, 16:10 UTC1h 0m
2026-07-22 NSZ43E ARN → LLA Jul 22, 13:20 UTCJul 22, 14:10 UTC50m
2026-07-22 NSZ6YF SPU → ARN Jul 22, 10:20 UTCJul 22, 11:25 UTC1h 5m
2026-07-21 NSZ5YD BIO → ARN Jul 21, 15:20 UTCJul 21, 18:20 UTC3h 0m
2026-07-21 NSZ4257 ARN → BIO Jul 21, 11:05 UTCJul 21, 13:50 UTC2h 45m
2026-07-21 NSZ4502 MUC → ARN Jul 21, 08:25 UTCJul 21, 10:10 UTC1h 45m
2026-07-21 NSZ4501 ARN → MUC Jul 21, 05:25 UTCJul 21, 07:20 UTC1h 55m
2026-07-20 NSZ2CP - Jul 20, 18:55 UTCJul 20, 22:45 UTC3h 50m
2026-07-20 NSZ21U ARN → AGP Jul 20, 13:55 UTCJul 20, 17:45 UTC3h 50m
2026-07-20 NSZ56J - Jul 20, 09:20 UTCJul 20, 12:00 UTC2h 40m
2026-07-20 NSZ5NE ARN → FCO Jul 20, 05:05 UTCJul 20, 07:55 UTC2h 50m
2026-07-19 NSZ24N NCE → ARN Jul 19, 20:05 UTCJul 19, 22:30 UTC2h 25m
2026-07-19 NSZ3YL ARN → NCE Jul 19, 15:40 UTCJul 19, 18:20 UTC2h 40m
2026-07-19 NSZ4092 - Jul 19, 14:05 UTCJul 19, 14:30 UTC25m
2026-07-19 NSZ4091 ARN → VBY Jul 19, 12:50 UTCJul 19, 13:10 UTC20m
2026-07-19 NSZ4454 LGW → ARN Jul 19, 09:50 UTCJul 19, 11:50 UTC2h 0m
2026-07-19 NSZ4453 ARN → LGW Jul 19, 06:15 UTCJul 19, 08:25 UTC2h 10m
2026-07-18 NSZ4396 CHQ → ARN Jul 18, 19:00 UTCJul 18, 22:25 UTC3h 25m
2026-07-18 NSZ4395 ARN → CHQ Jul 18, 13:30 UTCJul 18, 17:00 UTC3h 30m
2026-07-18 NSZ4BP HEL → ARN Jul 18, 11:15 UTCJul 18, 12:00 UTC45m
2026-07-18 NSZ23PH PSA → HEL Jul 18, 07:40 UTCJul 18, 10:25 UTC2h 45m
2026-07-18 NSZ2942 HEL → PSA Jul 18, 03:30 UTCJul 18, 06:35 UTC3h 5m
2026-07-17 NSZ2889 - Jul 17, 19:40 UTCJul 17, 23:35 UTC3h 55m
2026-07-17 NSZ6HT - Jul 17, 13:55 UTCJul 17, 18:34 UTC4h 40m
2026-07-17 NSZ2975 LCA → HEL Jul 17, 08:40 UTCJul 17, 12:50 UTC4h 10m
2026-07-17 NSZ2974 HEL → LCA Jul 17, 03:10 UTCJul 17, 07:05 UTC3h 55m
2026-07-16 NSZ2887 - Jul 16, 19:25 UTCJul 16, 23:29 UTC4h 5m
2026-07-16 NSZ6HT - Jul 16, 13:20 UTCJul 16, 17:49 UTC4h 30m

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

Mode-S 4ACA83 frequently asked

What is Mode-S code 4ACA83?
4ACA83 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RTC.
Where is Mode-S 4ACA83 registered?
Mode-S code 4ACA83 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACA83 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACA83, octal 22545203, decimal 4,901,507.
What flights does 4ACA83 operate?
Mode-S 4ACA83 has broadcast 20 distinct callsigns, including NSZ6HT, NSZ2900, NSZ83AH, NSZ4AW, NSZ2901.