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
Broadcasting now · callsign NSZ83AH · 37,000 ft
Flights observed
483
Distinct callsigns
20
Country
SE
Last broadcast
1h ago

Current position

4ACA83 is currently broadcasting. Map zoomed to live position.

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 - 12 2026-07-11
NSZ2900 - 12 2026-07-10
NSZ83AH - 11 2026-07-14
NSZ4AW - 11 2026-07-14
NSZ2901 - 11 2026-07-10
NSZ2887 - 10 2026-07-11
NSZ2617 - 9 2026-07-12
NSZ2616 - 9 2026-07-12
NSZ6RD - 7 2026-07-05
NSZ2767 - 7 2026-07-13
NSZ2766 - 7 2026-07-13
NSZ2613 - 7 2026-07-07
NSZ8GH Norwegian Air Sweden AOC 6 2026-06-08
NSZ56J Norwegian Air Sweden AOC 6 2026-06-20
NSZ2615 - 6 2026-07-13
NSZ5NE - 5 2026-06-20
NSZ5B Norwegian Air Sweden AOC 5 2026-06-08
NSZ2913 - 5 2026-06-16
NSZ2893 Norwegian Air Sweden AOC 5 2026-06-16
NSZ2890 - 5 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 NSZ83AH - Jul 14, 08:55 UTCJul 14, 10:45 UTC1h 50m
2026-07-14 NSZ4AW - Jul 14, 03:10 UTCJul 14, 07:40 UTC4h 30m
2026-07-13 NSZ26Q - Jul 13, 20:15 UTCJul 13, 23:00 UTC2h 45m
2026-07-13 NSZ2856 - Jul 13, 16:20 UTCJul 13, 19:15 UTC2h 55m
2026-07-13 NSZ2615 - Jul 13, 14:45 UTCJul 13, 15:25 UTC40m
2026-07-13 NSZ4BP HEL → ARN Jul 13, 13:15 UTCJul 13, 14:00 UTC45m
2026-07-13 NSZ2767 LGW → HEL Jul 13, 09:30 UTCJul 13, 12:05 UTC2h 35m
2026-07-13 NSZ2766 HEL → LGW Jul 13, 05:15 UTCJul 13, 08:10 UTC2h 55m
2026-07-12 NSZ1GT - Jul 12, 20:25 UTCJul 12, 21:05 UTC40m
2026-07-12 NSZ2FU - Jul 12, 19:01 UTCJul 12, 19:40 UTC40m
2026-07-12 NSZ2617 - Jul 12, 17:35 UTCJul 12, 18:15 UTC40m
2026-07-12 NSZ2616 HEL → ARN Jul 12, 16:05 UTCJul 12, 16:50 UTC45m
2026-07-12 NSZ7RP - Jul 12, 13:30 UTCJul 12, 14:15 UTC45m
2026-07-12 NSZ6YA - Jul 12, 11:25 UTCJul 12, 12:15 UTC50m
2026-07-12 NSZ2845 - Jul 12, 07:40 UTCJul 12, 10:05 UTC2h 25m
2026-07-12 NSZ2844 - Jul 12, 03:55 UTCJul 12, 06:15 UTC2h 20m
2026-07-11 NSZ2831 - Jul 11, 19:55 UTCJul 11, 22:30 UTC2h 35m
2026-07-11 NSZ2830 - Jul 11, 14:45 UTCJul 11, 17:20 UTC2h 35m
2026-07-11 NSZ2887 - Jul 11, 09:20 UTCJul 11, 13:35 UTC4h 15m
2026-07-11 NSZ6HT - Jul 11, 03:15 UTCJul 11, 07:40 UTC4h 25m
2026-07-10 NSZ26Q - Jul 10, 21:10 UTCJul 11, 00:00 UTC2h 50m
2026-07-10 NSZ2856 - Jul 10, 17:10 UTCJul 10, 19:55 UTC2h 45m
2026-07-10 NSZ2901 BCN → HEL Jul 10, 12:30 UTCJul 10, 16:00 UTC3h 30m
2026-07-10 NSZ2900 HEL → BCN Jul 10, 07:30 UTCJul 10, 11:00 UTC3h 30m
2026-07-10 NSZ23Y ARN → HEL Jul 10, 05:50 UTCJul 10, 06:30 UTC40m
2026-07-10 NSZ2602 HEL → ARN Jul 10, 04:15 UTCJul 10, 04:55 UTC40m
2026-07-09 NSZ2895 - Jul 9, 18:15 UTCJul 9, 22:00 UTC3h 45m
2026-07-09 NSZ24KW - Jul 9, 13:20 UTCJul 9, 16:45 UTC3h 25m
2026-07-09 NSZ2901 BCN → HEL Jul 9, 08:10 UTCJul 9, 11:50 UTC3h 40m
2026-07-09 NSZ2900 HEL → BCN Jul 9, 03:15 UTCJul 9, 06:35 UTC3h 20m
2026-07-08 NSZ2953 - Jul 8, 20:05 UTCJul 8, 23:40 UTC3h 35m
2026-07-08 NSZ2952 - Jul 8, 15:35 UTCJul 8, 19:00 UTC3h 25m
2026-07-08 NSZ2829 - Jul 8, 11:30 UTCJul 8, 14:10 UTC2h 40m
2026-07-08 NSZ2828 - Jul 8, 07:45 UTCJul 8, 10:10 UTC2h 25m
2026-07-08 NSZ23Y ARN → HEL Jul 8, 06:00 UTCJul 8, 06:40 UTC40m
2026-07-08 NSZ2602 HEL → ARN Jul 8, 04:15 UTCJul 8, 05:00 UTC45m
2026-07-07 NSZ2941 - Jul 7, 18:50 UTCJul 7, 21:30 UTC2h 40m
2026-07-07 NSZ2940 - Jul 7, 15:05 UTCJul 7, 17:40 UTC2h 35m
2026-07-07 NSZ2613 ARN → HEL Jul 7, 13:25 UTCJul 7, 14:10 UTC45m
2026-07-07 NSZ2ES LGW → ARN Jul 7, 10:25 UTCJul 7, 12:25 UTC2h 0m
2026-07-07 NSZ51M ARN → LGW Jul 7, 07:10 UTCJul 7, 09:25 UTC2h 15m
2026-07-06 NSZ4122 - Jul 6, 20:15 UTCJul 6, 20:50 UTC35m
2026-07-06 NSZ4121 - Jul 6, 18:40 UTCJul 6, 19:25 UTC45m
2026-07-06 NSZ4PU - Jul 6, 15:15 UTCJul 6, 17:50 UTC2h 35m
2026-07-06 NSZ4329 - Jul 6, 11:10 UTCJul 6, 13:30 UTC2h 20m
2026-07-06 NSZ4340 - Jul 6, 07:45 UTCJul 6, 10:10 UTC2h 25m
2026-07-06 NSZ39TP - Jul 6, 04:45 UTCJul 6, 06:55 UTC2h 10m
2026-07-05 NSZ18X - Jul 5, 20:20 UTCJul 5, 21:05 UTC45m
2026-07-05 NSZ15Y - Jul 5, 18:50 UTCJul 5, 19:25 UTC35m
2026-07-05 NSZ48U BUD → ARN Jul 5, 15:50 UTCJul 5, 17:45 UTC1h 55m

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?
Yes. Mode-S 4ACA83 is currently airborne.
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.