sensors Mode-S transponder

4ACA94

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RTT · BOEING 737 MAX 8

Hex
4ACA94
Octal
22545224
Decimal
4,901,524
Country
SE
Tail
SE-RTT
Type
B38M
No current signal · last broadcast 12h ago
Flights observed
12
Distinct callsigns
11
Country
SE
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 4ACA94.

Country allocation

The ICAO 24-bit address 4ACA94 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 11 distinct

Callsign Airline Flights Last seen
NSZ3406 Norwegian Air Sweden AOC 2 2026-04-14
NSZ9BH - 1 2026-04-13
NSZ82F - 1 2026-04-13
NSZ6WT - 1 2026-04-12
NSZ5GP - 1 2026-04-12
NSZ3733 - 1 2026-04-13
NSZ3732 - 1 2026-04-13
NSZ3407 Norwegian Air Sweden AOC 1 2026-04-14
NSZ3085 - 1 2026-04-13
NSZ3080 - 1 2026-04-13
NSZ3079 - 1 2026-04-13

Recent flights last 12

DateFlightRouteTakeoffLandingDuration
2026-04-14 NSZ3407 RAK → CPH Apr 14, 10:00 UTCApr 14, 11:05 UTC1h 5m
2026-04-14 NSZ3406 CPH → RAK Apr 14, 07:10 UTCApr 14, 07:50 UTC40m
2026-04-14 NSZ3406 CPH → RAK Apr 14, 05:15 UTCApr 14, 07:10 UTC1h 55m
2026-04-13 NSZ3733 - Apr 13, 19:55 UTCApr 13, 20:10 UTC15m
2026-04-13 NSZ3732 - Apr 13, 16:20 UTCApr 13, 18:35 UTC2h 15m
2026-04-13 NSZ3085 - Apr 13, 10:30 UTCApr 13, 10:55 UTC25m
2026-04-13 NSZ82F - Apr 13, 09:05 UTCApr 13, 09:30 UTC25m
2026-04-13 NSZ9BH - Apr 13, 06:45 UTCApr 13, 07:15 UTC30m
2026-04-13 NSZ3080 - Apr 13, 05:45 UTCApr 13, 06:10 UTC25m
2026-04-13 NSZ3079 - Apr 13, 04:35 UTCApr 13, 05:10 UTC35m
2026-04-12 NSZ5GP - Apr 12, 18:35 UTCApr 12, 19:30 UTC55m
2026-04-12 NSZ6WT - Apr 12, 17:15 UTCApr 12, 17:50 UTC35m

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

Mode-S 4ACA94 frequently asked

What is Mode-S code 4ACA94?
4ACA94 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RTT.
Where is Mode-S 4ACA94 registered?
Mode-S code 4ACA94 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACA94 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACA94, octal 22545224, decimal 4,901,524.
What flights does 4ACA94 operate?
Mode-S 4ACA94 has broadcast 11 distinct callsigns, including NSZ3406, NSZ9BH, NSZ82F, NSZ6WT, NSZ5GP.