Apparatus

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sensors Mode-S transponder

4ACA85

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RTE · BOEING 737 MAX 8

Hex
4ACA85
Octal
22545205
Decimal
4,901,509
Country
SE
Tail
SE-RTE
Type
B38M
Broadcasting now · callsign NSZ4507 · 27,650 ft
Flights observed
487
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 21:05 UTC

Current position

4ACA85 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4ACA85 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
NSZ83AH - 13 2026-07-19
NSZ4AW Norwegian Air Sweden AOC 11 2026-07-19
NSZ6HT Norwegian Air Sweden AOC 10 2026-07-25
NSZ2862 Norwegian Air Sweden AOC 8 2026-06-08
NSZ6LA - 7 2026-07-12
NSZ5714 - 7 2026-07-08
NSZ2863 Norwegian Air Sweden AOC 7 2026-06-08
NSZ2613 Norwegian Air Sweden AOC 7 2026-07-24
NSZ2602 Norwegian Air Sweden AOC 7 2026-07-23
NSZ5WU - 6 2026-07-12
NSZ38K - 6 2026-07-15
NSZ35A - 6 2026-07-15
NSZ2TH Norwegian Air Sweden AOC 6 2026-07-23
NSZ2887 Norwegian Air Sweden AOC 6 2026-07-25
NSZ2621 Norwegian Air Sweden AOC 6 2026-07-24
NSZ2620 Norwegian Air Sweden AOC 6 2026-07-24
NSZ8YC Norwegian Air Sweden AOC 5 2026-07-23
NSZ6RD Norwegian Air Sweden AOC 5 2026-07-24
NSZ60X Norwegian Air Sweden AOC 5 2026-05-20
NSZ59T Norwegian Air Sweden AOC 5 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 NSZ2771 LGW → HEL Jul 26, 18:40 UTCJul 26, 21:00 UTC2h 20m
2026-07-26 NSZ2770 HEL → LGW Jul 26, 14:30 UTCJul 26, 17:20 UTC2h 50m
2026-07-26 NSZ2901 BCN → HEL Jul 26, 09:05 UTCJul 26, 12:35 UTC3h 30m
2026-07-26 NSZ2900 HEL → BCN Jul 26, 04:10 UTCJul 26, 07:45 UTC3h 36m
2026-07-25 NSZ2831 TIA → HEL Jul 25, 14:50 UTCJul 25, 22:05 UTC7h 15m
2026-07-25 NSZ2887 AGP → HEL Jul 25, 09:15 UTCJul 25, 13:20 UTC4h 5m
2026-07-25 NSZ6HT HEL → AGP Jul 25, 03:25 UTCJul 25, 08:00 UTC4h 35m
2026-07-24 NSZ2847 SPU → HEL Jul 24, 18:50 UTCJul 24, 21:25 UTC2h 35m
2026-07-24 NSZ2846 HEL → SPU Jul 24, 14:40 UTCJul 24, 16:50 UTC2h 10m
2026-07-24 NSZ2613 ARN → HEL Jul 24, 13:00 UTCJul 24, 13:40 UTC40m
2026-07-24 NSZ2621 PRG → ARN Jul 24, 10:20 UTCJul 24, 12:00 UTC1h 40m
2026-07-24 NSZ2620 ARN → PRG Jul 24, 07:25 UTCJul 24, 09:00 UTC1h 35m
2026-07-24 NSZ6RD HEL → ARN Jul 24, 05:35 UTCJul 24, 06:20 UTC45m
2026-07-23 NSZ1GT ARN → HEL Jul 23, 20:25 UTCJul 23, 21:05 UTC40m
2026-07-23 NSZ2FU HEL → ARN Jul 23, 18:50 UTCJul 23, 19:30 UTC40m
2026-07-23 NSZ2617 ARN → HEL Jul 23, 17:20 UTCJul 23, 18:05 UTC45m
2026-07-23 NSZ2616 HEL → ARN Jul 23, 15:50 UTCJul 23, 16:30 UTC40m
2026-07-23 NSZ8YC NCE → HEL Jul 23, 11:40 UTCJul 23, 14:40 UTC3h 0m
2026-07-23 NSZ2TH HEL → NCE Jul 23, 07:25 UTCJul 23, 10:35 UTC3h 10m
2026-07-23 NSZ23Y ARN → HEL Jul 23, 05:45 UTCJul 23, 06:30 UTC45m
2026-07-23 NSZ2602 HEL → ARN Jul 23, 04:10 UTCJul 23, 04:50 UTC40m
2026-07-22 NSZ2953 CHQ → HEL Jul 22, 20:25 UTCJul 22, 23:55 UTC3h 30m
2026-07-22 NSZ2952 HEL → CHQ Jul 22, 15:35 UTCJul 22, 19:10 UTC3h 35m
2026-07-22 NSZ2829 TIV → HEL Jul 22, 12:05 UTCJul 22, 14:35 UTC2h 30m
2026-07-22 NSZ2602 HEL → ARN Jul 22, 04:10 UTCJul 22, 04:50 UTC40m
2026-07-21 NSZ2827 PRN → HEL Jul 21, 19:35 UTCJul 21, 22:20 UTC2h 45m
2026-07-21 NSZ2826 HEL → PRN Jul 21, 15:40 UTCJul 21, 18:15 UTC2h 35m
2026-07-21 NSZ23PH PSA → HEL Jul 21, 11:40 UTCJul 21, 14:20 UTC2h 40m
2026-07-21 NSZ2942 HEL → PSA Jul 21, 07:35 UTCJul 21, 10:25 UTC2h 50m
2026-07-21 NSZ23Y ARN → HEL Jul 21, 05:45 UTCJul 21, 06:25 UTC40m
2026-07-21 NSZ2602 HEL → ARN Jul 21, 04:10 UTCJul 21, 04:55 UTC45m
2026-07-20 NSZ2805 NCE → HEL Jul 20, 19:15 UTCJul 20, 22:00 UTC2h 45m
2026-07-20 NSZ2804 HEL → NCE Jul 20, 15:00 UTCJul 20, 18:05 UTC3h 5m
2026-07-20 NSZ2845 SPU → HEL Jul 20, 11:20 UTCJul 20, 13:35 UTC2h 15m
2026-07-20 NSZ2844 HEL → SPU Jul 20, 07:35 UTCJul 20, 10:00 UTC2h 25m
2026-07-20 NSZ23Y ARN → HEL Jul 20, 06:00 UTCJul 20, 06:40 UTC40m
2026-07-20 NSZ2602 HEL → ARN Jul 20, 04:20 UTCJul 20, 05:05 UTC45m
2026-07-19 NSZ2913 - Jul 19, 20:10 UTCJul 19, 23:55 UTC3h 45m
2026-07-19 NSZ9WP - Jul 19, 15:00 UTCJul 19, 19:15 UTC4h 15m
2026-07-19 NSZ83AH - Jul 19, 09:35 UTCJul 19, 13:35 UTC4h 0m
2026-07-19 NSZ4AW HEL → AGP Jul 19, 03:40 UTCJul 19, 08:30 UTC4h 50m
2026-07-18 NSZ2911 ALC → HEL Jul 18, 17:55 UTCJul 18, 21:40 UTC3h 45m
2026-07-18 NSZ2910 HEL → ALC Jul 18, 12:15 UTCJul 18, 16:25 UTC4h 10m
2026-07-18 NSZ2829 TIV → HEL Jul 18, 04:00 UTCJul 18, 10:45 UTC6h 45m
2026-07-17 NSZ2847 SPU → HEL Jul 17, 18:34 UTCJul 17, 21:00 UTC2h 25m
2026-07-17 NSZ2846 HEL → SPU Jul 17, 14:44 UTCJul 17, 17:15 UTC2h 30m
2026-07-17 NSZ83AH - Jul 17, 09:35 UTCJul 17, 13:35 UTC4h 0m
2026-07-17 NSZ4AW - Jul 17, 03:45 UTCJul 17, 08:20 UTC4h 35m
2026-07-16 NSZ2913 - Jul 16, 22:10 UTCJul 17, 01:59 UTC3h 50m
2026-07-16 NSZ9WP HEL → ALC Jul 16, 15:19 UTCJul 16, 19:40 UTC4h 20m

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

Mode-S 4ACA85 frequently asked

What is Mode-S code 4ACA85?
4ACA85 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RTE.
Where is Mode-S 4ACA85 registered?
Mode-S code 4ACA85 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACA85 broadcasting right now?
Yes. Mode-S 4ACA85 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACA85, octal 22545205, decimal 4,901,509.
What flights does 4ACA85 operate?
Mode-S 4ACA85 has broadcast 20 distinct callsigns, including NSZ83AH, NSZ4AW, NSZ6HT, NSZ2862, NSZ6LA.