Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
Broadcasting now · callsign NSZ5524 · 40,000 ft
Flights observed
567
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 19:50 UTC

Current position

4ACA94 is currently broadcasting. Map zoomed to live position.

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 20 distinct

Callsign Airline Flights Last seen
NSZ5KA - 9 2026-07-17
NSZ9BP Norwegian Air Sweden AOC 7 2026-07-22
NSZ7CB - 7 2026-06-26
NSZ5TQ Norwegian Air Sweden AOC 7 2026-07-22
NSZ5071 Norwegian Air Sweden AOC 7 2026-07-22
NSZ5051 Norwegian Air Sweden AOC 7 2026-07-24
NSZ46BA - 7 2026-06-26
NSZ3733 - 7 2026-07-14
NSZ3732 - 7 2026-07-14
NSZ8KC Norwegian Air Sweden AOC 6 2026-05-29
NSZ6PY - 6 2026-06-20
NSZ5TP - 6 2026-07-11
NSZ5070 Norwegian Air Sweden AOC 6 2026-05-28
NSZ3FZ - 6 2026-07-17
NSZ1KS - 6 2026-06-20
NSZ9GY - 5 2026-06-21
NSZ8FI - 5 2026-06-21
NSZ7VR - 5 2026-07-06
NSZ6UK - 5 2026-07-06
NSZ5074 Norwegian Air Sweden AOC 5 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 NSZ6MP CPH → AAL Jul 26, 19:20 UTCJul 26, 19:50 UTC30m
2026-07-26 NSZ541B AMS → CPH Jul 26, 17:35 UTCJul 26, 18:30 UTC55m
2026-07-26 NSZ54CA CPH → AMS Jul 26, 15:10 UTCJul 26, 16:10 UTC1h 0m
2026-07-26 NSZ3631 BSL → CPH Jul 26, 12:30 UTCJul 26, 13:55 UTC1h 25m
2026-07-26 NSZ3630 CPH → BSL Jul 26, 09:55 UTCJul 26, 11:20 UTC1h 25m
2026-07-26 NSZ3777 CLJ → CPH Jul 26, 07:20 UTCJul 26, 09:00 UTC1h 40m
2026-07-26 NSZ3776 CPH → CLJ Jul 26, 04:15 UTCJul 26, 05:50 UTC1h 35m
2026-07-25 NSZ3751 BGY → CPH Jul 25, 18:55 UTCJul 25, 20:35 UTC1h 40m
2026-07-25 NSZ3750 CPH → BGY Jul 25, 15:50 UTCJul 25, 17:30 UTC1h 40m
2026-07-25 NSZ89C PRG → CPH Jul 25, 13:35 UTCJul 25, 14:40 UTC1h 5m
2026-07-25 NSZ8ML CPH → PRG Jul 25, 11:40 UTCJul 25, 12:40 UTC1h 0m
2026-07-25 NSZ79AY - Jul 25, 08:10 UTCJul 25, 10:30 UTC2h 20m
2026-07-25 NSZ3752 CPH → BRI Jul 25, 04:55 UTCJul 25, 06:55 UTC2h 0m
2026-07-24 NSZ3305 BER → CPH Jul 24, 20:45 UTCJul 24, 21:50 UTC1h 5m
2026-07-24 NSZ3304 CPH → BER Jul 24, 19:10 UTCJul 24, 19:50 UTC40m
2026-07-24 NSZ5074 AGP → CPH Jul 24, 15:20 UTCJul 24, 18:20 UTC3h 0m
2026-07-24 NSZ5051 ARN → AGP Jul 24, 09:45 UTCJul 24, 13:50 UTC4h 5m
2026-07-24 NSZ90Y AGP → ARN Jul 24, 04:35 UTCJul 24, 08:20 UTC3h 45m
2026-07-23 NSZ5023 OSL → AGP Jul 23, 17:35 UTCJul 23, 21:10 UTC3h 35m
2026-07-23 NSZ2TU - Jul 23, 12:55 UTCJul 23, 16:45 UTC3h 50m
2026-07-23 NSZ5141 MUC → AGP Jul 23, 09:00 UTCJul 23, 11:45 UTC2h 45m
2026-07-23 NSZ5140 AGP → MUC Jul 23, 05:20 UTCJul 23, 07:50 UTC2h 30m
2026-07-22 NSZ9BP GOT → AGP Jul 22, 17:45 UTCJul 22, 21:10 UTC3h 25m
2026-07-22 NSZ5TQ AGP → GOT Jul 22, 13:20 UTCJul 22, 16:45 UTC3h 25m
2026-07-22 NSZ5071 CPH → AGP Jul 22, 04:35 UTCJul 22, 12:05 UTC7h 30m
2026-07-21 NSZ5037 SVG → AGP Jul 21, 19:35 UTCJul 21, 22:50 UTC3h 15m
2026-07-21 NSZ5036 AGP → SVG Jul 21, 15:20 UTCJul 21, 18:40 UTC3h 20m
2026-07-21 NSZ5051 ARN → AGP Jul 21, 09:55 UTCJul 21, 13:45 UTC3h 50m
2026-07-21 NSZ90Y AGP → ARN Jul 21, 04:35 UTCJul 21, 08:30 UTC3h 55m
2026-07-20 NSZ5053 - Jul 20, 18:25 UTCJul 20, 22:20 UTC3h 55m
2026-07-20 NSZ5052 - Jul 20, 13:30 UTCJul 20, 17:20 UTC3h 50m
2026-07-20 NSZ5037 - Jul 20, 08:50 UTCJul 20, 12:10 UTC3h 20m
2026-07-20 NSZ5036 AGP → SVG Jul 20, 04:25 UTCJul 20, 07:45 UTC3h 20m
2026-07-19 NSZ5075 - Jul 19, 18:25 UTCJul 19, 21:45 UTC3h 20m
2026-07-19 NSZ3MC LGW → CPH Jul 19, 13:10 UTCJul 19, 14:40 UTC1h 30m
2026-07-19 NSZ4EV CPH → LGW Jul 19, 10:15 UTCJul 19, 12:00 UTC1h 45m
2026-07-19 NSZ50TE - Jul 19, 07:55 UTCJul 19, 09:20 UTC1h 25m
2026-07-19 NSZ3502 CPH → EDI Jul 19, 05:15 UTCJul 19, 06:40 UTC1h 25m
2026-07-18 NSZ82ME DBV → CPH Jul 18, 20:45 UTCJul 18, 22:45 UTC2h 0m
2026-07-18 NSZ3280 CPH → DBV Jul 18, 17:40 UTCJul 18, 19:45 UTC2h 5m
2026-07-18 NSZ3GC LGW → CPH Jul 18, 14:45 UTCJul 18, 16:05 UTC1h 20m
2026-07-18 NSZ3516 CPH → LGW Jul 18, 12:00 UTCJul 18, 13:45 UTC1h 45m
2026-07-18 NSZ3731 FCO → CPH Jul 18, 08:40 UTCJul 18, 10:40 UTC2h 0m
2026-07-18 NSZ3730 CPH → FCO Jul 18, 05:15 UTCJul 18, 07:15 UTC2h 0m
2026-07-17 NSZ3667 - Jul 17, 19:35 UTCJul 17, 21:55 UTC2h 20m
2026-07-17 NSZ74Q - Jul 17, 15:35 UTCJul 17, 18:15 UTC2h 40m
2026-07-17 NSZ352T NCL → CPH Jul 17, 12:55 UTCJul 17, 14:10 UTC1h 15m
2026-07-17 NSZ3528 CPH → NCL Jul 17, 10:25 UTCJul 17, 11:50 UTC1h 25m
2026-07-17 NSZ5KA - Jul 17, 07:50 UTCJul 17, 09:15 UTC1h 25m
2026-07-17 NSZ3FZ CPH → BUD Jul 17, 05:30 UTCJul 17, 06:50 UTC1h 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-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?
Yes. Mode-S 4ACA94 is currently airborne.
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 20 distinct callsigns, including NSZ5KA, NSZ9BP, NSZ7CB, NSZ5TQ, NSZ5071.