Apparatus

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sensors Mode-S transponder

4ACA82

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RTB · BOEING 737 MAX 8

Hex
4ACA82
Octal
22545202
Decimal
4,901,506
Country
SE
Tail
SE-RTB
Type
B38M
Broadcasting now · callsign NSZ39C · 38,975 ft
Flights observed
500
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 20:45 UTC

Current position

4ACA82 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4ACA82 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 Norwegian Air Sweden AOC 15 2026-07-19
NSZ2887 - 11 2026-07-19
NSZ2767 Norwegian Air Sweden AOC 10 2026-07-22
NSZ2766 - 10 2026-07-15
NSZ3YT Norwegian Air Sweden AOC 8 2026-07-24
NSZ2MP Norwegian Air Sweden AOC 8 2026-07-24
NSZ2901 - 8 2026-07-13
NSZ2900 - 7 2026-07-13
NSZ2621 Norwegian Air Sweden AOC 7 2026-07-08
NSZ2613 - 7 2026-07-12
NSZ6RD - 6 2026-07-12
NSZ5NE Norwegian Air Sweden AOC 6 2026-07-25
NSZ2620 - 6 2026-07-08
NSZ2615 Norwegian Air Sweden AOC 6 2026-07-25
NSZ13R Norwegian Air Sweden AOC 6 2026-07-24
NSZ83AH - 5 2026-07-20
NSZ56J Norwegian Air Sweden AOC 5 2026-07-25
NSZ51M - 5 2026-07-17
NSZ4BP Norwegian Air Sweden AOC 5 2026-07-22
NSZ4AW Norwegian Air Sweden AOC 5 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 NSZ1GT ARN → HEL Jul 26, 20:00 UTCJul 26, 20:40 UTC40m
2026-07-26 NSZ2FU HEL → ARN Jul 26, 18:25 UTCJul 26, 19:10 UTC45m
2026-07-26 NSZ2617 ARN → HEL Jul 26, 17:05 UTCJul 26, 17:45 UTC40m
2026-07-26 NSZ2616 HEL → ARN Jul 26, 15:20 UTCJul 26, 16:05 UTC45m
2026-07-26 NSZ7RP RVN → HEL Jul 26, 13:25 UTCJul 26, 14:20 UTC55m
2026-07-26 NSZ6YA HEL → RVN Jul 26, 11:25 UTCJul 26, 12:10 UTC45m
2026-07-26 NSZ2845 SPU → HEL Jul 26, 07:40 UTCJul 26, 10:05 UTC2h 25m
2026-07-26 NSZ2844 HEL → SPU Jul 26, 03:45 UTCJul 26, 06:10 UTC2h 25m
2026-07-25 NSZ2953 CHQ → HEL Jul 25, 21:00 UTCJul 26, 00:40 UTC3h 40m
2026-07-25 NSZ2952 HEL → CHQ Jul 25, 16:35 UTCJul 25, 19:45 UTC3h 10m
2026-07-25 NSZ2615 ARN → HEL Jul 25, 13:30 UTCJul 25, 14:10 UTC40m
2026-07-25 NSZ56J FCO → ARN Jul 25, 09:45 UTCJul 25, 12:25 UTC2h 40m
2026-07-25 NSZ5NE ARN → FCO Jul 25, 05:10 UTCJul 25, 07:50 UTC2h 40m
2026-07-24 NSZ4376 BRI → ARN Jul 24, 20:00 UTCJul 24, 23:00 UTC3h 0m
2026-07-24 NSZ4375 ARN → BRI Jul 24, 16:20 UTCJul 24, 18:45 UTC2h 25m
2026-07-24 NSZ14V UME → ARN Jul 24, 14:35 UTCJul 24, 15:15 UTC40m
2026-07-24 NSZ13R ARN → UME Jul 24, 12:50 UTCJul 24, 13:30 UTC40m
2026-07-24 NSZ2MP NCE → ARN Jul 24, 09:10 UTCJul 24, 11:50 UTC2h 40m
2026-07-24 NSZ3YT ARN → NCE Jul 24, 05:15 UTCJul 24, 07:45 UTC2h 30m
2026-07-23 NSZ24N NCE → ARN Jul 23, 19:00 UTCJul 23, 21:55 UTC2h 55m
2026-07-23 NSZ3YL ARN → NCE Jul 23, 15:20 UTCJul 23, 17:50 UTC2h 30m
2026-07-23 NSZ4506 BER → ARN Jul 23, 11:45 UTCJul 23, 13:10 UTC1h 25m
2026-07-23 NSZ4505 ARN → BER Jul 23, 09:25 UTCJul 23, 10:35 UTC1h 10m
2026-07-23 NSZ38K LLA → ARN Jul 23, 07:25 UTCJul 23, 08:20 UTC55m
2026-07-23 NSZ35A ARN → LLA Jul 23, 05:35 UTCJul 23, 06:30 UTC55m
2026-07-22 NSZ4340 PUY → ARN Jul 22, 20:25 UTCJul 22, 20:40 UTC15m
2026-07-22 NSZ4340 PUY → ARN Jul 22, 18:35 UTCJul 22, 20:05 UTC1h 30m
2026-07-22 NSZ39TP ARN → PUY Jul 22, 15:35 UTCJul 22, 17:40 UTC2h 5m
2026-07-22 NSZ4BP HEL → ARN Jul 22, 13:40 UTCJul 22, 14:25 UTC45m
2026-07-22 NSZ2767 LGW → HEL Jul 22, 10:20 UTCJul 22, 12:05 UTC1h 45m
2026-07-21 NSZ2913 ALC → HEL Jul 21, 20:05 UTCJul 22, 00:00 UTC3h 55m
2026-07-21 NSZ9WP HEL → ALC Jul 21, 15:05 UTCJul 21, 18:55 UTC3h 50m
2026-07-21 NSZ2893 PMI → HEL Jul 21, 10:15 UTCJul 21, 13:45 UTC3h 30m
2026-07-21 NSZ2892 HEL → PMI Jul 21, 04:55 UTCJul 21, 08:50 UTC3h 55m
2026-07-20 NSZ2863 OTP → HEL Jul 20, 18:45 UTCJul 20, 21:05 UTC2h 20m
2026-07-20 NSZ2862 HEL → OTP Jul 20, 15:10 UTCJul 20, 17:45 UTC2h 35m
2026-07-20 NSZ83AH - Jul 20, 10:05 UTCJul 20, 14:15 UTC4h 10m
2026-07-20 NSZ4AW HEL → AGP Jul 20, 03:50 UTCJul 20, 08:20 UTC4h 30m
2026-07-19 NSZ2887 - Jul 19, 22:00 UTCJul 19, 22:40 UTC40m
2026-07-19 NSZ2887 - Jul 19, 18:40 UTCJul 19, 21:50 UTC3h 10m
2026-07-19 NSZ6HT HEL → AGP Jul 19, 12:50 UTCJul 19, 17:30 UTC4h 40m
2026-07-19 NSZ8YC NCE → HEL Jul 19, 09:10 UTCJul 19, 11:55 UTC2h 45m
2026-07-19 NSZ2TH HEL → NCE Jul 19, 04:45 UTCJul 19, 08:10 UTC3h 25m
2026-07-18 NSZ2831 TIA → HEL Jul 18, 20:00 UTCJul 18, 22:30 UTC2h 30m
2026-07-18 NSZ2830 HEL → TIA Jul 18, 15:25 UTCJul 18, 18:10 UTC2h 45m
2026-07-18 NSZ2615 ARN → HEL Jul 18, 13:25 UTCJul 18, 14:10 UTC45m
2026-07-18 NSZ2MP NCE → ARN Jul 18, 09:50 UTCJul 18, 12:15 UTC2h 25m
2026-07-18 NSZ3YT ARN → NCE Jul 18, 05:45 UTCJul 18, 08:30 UTC2h 45m
2026-07-17 NSZ4164 CPH → ARN Jul 17, 20:15 UTCJul 17, 21:10 UTC55m
2026-07-17 NSZ4163 ARN → CPH Jul 17, 17:50 UTCJul 17, 18:44 UTC55m

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

Mode-S 4ACA82 frequently asked

What is Mode-S code 4ACA82?
4ACA82 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RTB.
Where is Mode-S 4ACA82 registered?
Mode-S code 4ACA82 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACA82 broadcasting right now?
Yes. Mode-S 4ACA82 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACA82, octal 22545202, decimal 4,901,506.
What flights does 4ACA82 operate?
Mode-S 4ACA82 has broadcast 20 distinct callsigns, including NSZ6HT, NSZ2887, NSZ2767, NSZ2766, NSZ3YT.