sensors Mode-S transponder

4ACA86

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RTF · BOEING 737 MAX 8

Hex
4ACA86
Octal
22545206
Decimal
4,901,510
Country
SE
Tail
SE-RTF
Type
B38M
Broadcasting now · callsign NSZ4615 · 37,000 ft
Flights observed
13
Distinct callsigns
10
Country
SE
Last broadcast
21h ago

Current position

4ACA86 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4ACA86 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 10 distinct

Callsign Airline Flights Last seen
NSZ3MB - 3 2026-04-13
NSZ4MF - 2 2026-04-13
NSZ7DP - 1 2026-04-12
NSZ51M Norwegian Air Sweden AOC 1 2026-04-14
NSZ46M - 1 2026-04-12
NSZ45F - 1 2026-04-12
NSZ3LW - 1 2026-04-13
NSZ38K - 1 2026-04-13
NSZ35A - 1 2026-04-13
NSZ2ES Norwegian Air Sweden AOC 1 2026-04-14

Recent flights last 13

DateFlightRouteTakeoffLandingDuration
2026-04-14 NSZ2ES LGW → ARN Apr 14, 10:15 UTCApr 14, 11:05 UTC50m
2026-04-14 NSZ51M ARN → LGW Apr 14, 07:00 UTCApr 14, 07:10 UTC10m
2026-04-13 NSZ4MF - Apr 13, 19:50 UTCApr 13, 21:50 UTC2h 0m
2026-04-13 NSZ4MF - Apr 13, 18:45 UTCApr 13, 20:10 UTC1h 25m
2026-04-13 NSZ3MB - Apr 13, 16:15 UTCApr 13, 17:30 UTC1h 15m
2026-04-13 NSZ3MB - Apr 13, 15:50 UTCApr 13, 17:30 UTC1h 40m
2026-04-13 NSZ3MB - Apr 13, 14:05 UTCApr 13, 16:15 UTC2h 10m
2026-04-13 NSZ38K - Apr 13, 08:35 UTCApr 13, 09:40 UTC1h 5m
2026-04-13 NSZ35A - Apr 13, 06:50 UTCApr 13, 07:45 UTC55m
2026-04-13 NSZ3LW - Apr 13, 04:55 UTCApr 13, 06:00 UTC1h 5m
2026-04-12 NSZ7DP - Apr 12, 20:00 UTCApr 12, 20:15 UTC15m
2026-04-12 NSZ46M - Apr 12, 18:15 UTCApr 12, 19:20 UTC1h 5m
2026-04-12 NSZ45F - Apr 12, 17:15 UTCApr 12, 17:30 UTC15m

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

Mode-S 4ACA86 frequently asked

What is Mode-S code 4ACA86?
4ACA86 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RTF.
Where is Mode-S 4ACA86 registered?
Mode-S code 4ACA86 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACA86 broadcasting right now?
Yes. Mode-S 4ACA86 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACA86, octal 22545206, decimal 4,901,510.
What flights does 4ACA86 operate?
Mode-S 4ACA86 has broadcast 10 distinct callsigns, including NSZ3MB, NSZ4MF, NSZ7DP, NSZ51M, NSZ46M.