Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4ACA15

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RPU · BOEING 737-800

Hex
4ACA15
Octal
22545025
Decimal
4,901,397
Country
SE
Tail
SE-RPU
Type
B738
Broadcasting now · callsign NSZ3640 · 37,000 ft
Flights observed
517
Distinct callsigns
20
Country
SE
Last broadcast
20m ago

Current position

4ACA15 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4ACA15 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
NSZ5GT - 24 2026-06-25
NSZ6FY - 22 2026-06-25
NSZ5611 Norwegian Air Sweden AOC 11 2026-06-25
NSZ5610 - 9 2026-06-25
NSZ5619 - 6 2026-06-17
NSZ5618 - 6 2026-06-17
NSZ5ML Norwegian Air Sweden AOC 5 2026-06-05
NSZ3221 Norwegian Air Sweden AOC 5 2026-06-10
NSZ9BH - 4 2026-06-30
NSZ8MV Norwegian Air Sweden AOC 4 2026-05-20
NSZ8CM Norwegian Air Sweden AOC 4 2026-04-25
NSZ56V - 4 2026-07-13
NSZ54CA - 4 2026-07-12
NSZ541B - 4 2026-07-12
NSZ5352 Norwegian Air Sweden AOC 4 2026-06-07
NSZ365L - 4 2026-07-13
NSZ3641 - 4 2026-07-04
NSZ3640 - 4 2026-07-15
NSZ3563 - 4 2026-06-29
NSZ3562 - 4 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 NSZ3640 - Jul 15, 04:55 UTCJul 15, 05:15 UTC20m
2026-07-14 NSZ3211 ARN → CPH Jul 14, 18:50 UTCJul 14, 19:40 UTC50m
2026-07-14 NSZ3803 - Jul 14, 17:10 UTCJul 14, 17:50 UTC40m
2026-07-14 NSZ3802 - Jul 14, 15:30 UTCJul 14, 16:05 UTC35m
2026-07-14 NSZ3206 CPH → ARN Jul 14, 13:25 UTCJul 14, 14:15 UTC50m
2026-07-14 NSZ3613 OPO → CPH Jul 14, 09:30 UTCJul 14, 12:20 UTC2h 50m
2026-07-14 NSZ2EM CPH → OPO Jul 14, 05:35 UTCJul 14, 08:40 UTC3h 5m
2026-07-13 NSZ9GY - Jul 13, 20:30 UTCJul 13, 21:50 UTC1h 20m
2026-07-13 NSZ8FI CPH → CDG Jul 13, 17:50 UTCJul 13, 19:20 UTC1h 30m
2026-07-13 NSZ3303 BER → CPH Jul 13, 16:30 UTCJul 13, 17:05 UTC35m
2026-07-13 NSZ3302 CPH → BER Jul 13, 14:55 UTCJul 13, 15:35 UTC40m
2026-07-13 NSZ365L BCN → CPH Jul 13, 11:35 UTCJul 13, 13:55 UTC2h 20m
2026-07-13 NSZ56V CPH → BCN Jul 13, 07:25 UTCJul 13, 10:00 UTC2h 35m
2026-07-13 NSZ81E - Jul 13, 05:15 UTCJul 13, 05:45 UTC30m
2026-07-12 NSZ6MP CPH → AAL Jul 12, 19:15 UTCJul 12, 19:40 UTC25m
2026-07-12 NSZ541B - Jul 12, 17:35 UTCJul 12, 18:25 UTC50m
2026-07-12 NSZ54CA CPH → AMS Jul 12, 15:10 UTCJul 12, 16:20 UTC1h 10m
2026-07-12 NSZ3631 - Jul 12, 12:25 UTCJul 12, 13:45 UTC1h 20m
2026-07-12 NSZ3630 CPH → BSL Jul 12, 09:55 UTCJul 12, 11:25 UTC1h 30m
2026-07-12 NSZ3777 - Jul 12, 07:05 UTCJul 12, 08:45 UTC1h 40m
2026-07-12 NSZ3776 - Jul 12, 04:20 UTCJul 12, 05:50 UTC1h 30m
2026-07-11 NSZ3645 NCE → CPH Jul 11, 17:40 UTCJul 11, 19:40 UTC2h 0m
2026-07-11 NSZ3644 CPH → NCE Jul 11, 14:40 UTCJul 11, 16:40 UTC2h 0m
2026-07-11 NSZ365L BCN → CPH Jul 11, 11:00 UTCJul 11, 13:35 UTC2h 35m
2026-07-11 NSZ56V CPH → BCN Jul 11, 07:15 UTCJul 11, 09:35 UTC2h 20m
2026-07-11 NSZ81E - Jul 11, 05:01 UTCJul 11, 05:31 UTC30m
2026-07-10 NSZ3929 NCE → AAL Jul 10, 19:10 UTCJul 10, 21:15 UTC2h 5m
2026-07-10 NSZ3928 AAL → NCE Jul 10, 16:00 UTCJul 10, 18:15 UTC2h 15m
2026-07-10 NSZ3086 CPH → AAL Jul 10, 14:45 UTCJul 10, 15:10 UTC25m
2026-07-10 NSZ6EZ VLC → CPH Jul 10, 10:45 UTCJul 10, 13:40 UTC2h 55m
2026-07-10 NSZ3654 CPH → VLC Jul 10, 06:45 UTCJul 10, 09:40 UTC2h 55m
2026-07-09 NSZ3301 BER → CPH Jul 9, 20:15 UTCJul 9, 21:00 UTC45m
2026-07-09 NSZ3300 CPH → BER Jul 9, 18:45 UTCJul 9, 19:25 UTC40m
2026-07-09 NSZ541B AMS → CPH Jul 9, 16:55 UTCJul 9, 17:55 UTC1h 0m
2026-07-09 NSZ54CA - Jul 9, 14:45 UTCJul 9, 15:50 UTC1h 5m
2026-07-09 NSZ7MW MUC → CPH Jul 9, 12:30 UTCJul 9, 13:50 UTC1h 20m
2026-07-09 NSZ3306 - Jul 9, 10:10 UTCJul 9, 11:20 UTC1h 10m
2026-07-09 NSZ5KA BUD → CPH Jul 9, 07:45 UTCJul 9, 09:20 UTC1h 35m
2026-07-09 NSZ3FZ CPH → BUD Jul 9, 05:35 UTCJul 9, 06:50 UTC1h 15m
2026-07-08 NSZ3235 - Jul 8, 20:10 UTCJul 8, 20:55 UTC45m
2026-07-08 NSZ3234 CPH → OSL Jul 8, 18:35 UTCJul 8, 19:30 UTC55m
2026-07-08 NSZ3231 OSL → CPH Jul 8, 16:55 UTCJul 8, 17:45 UTC50m
2026-07-08 NSZ3230 - Jul 8, 15:05 UTCJul 8, 16:00 UTC55m
2026-07-08 NSZ5KA BUD → CPH Jul 8, 12:40 UTCJul 8, 14:15 UTC1h 35m
2026-07-08 NSZ3FZ - Jul 8, 10:25 UTCJul 8, 11:45 UTC1h 20m
2026-07-08 NSZ7VR - Jul 8, 07:05 UTCJul 8, 09:10 UTC2h 5m
2026-07-08 NSZ6UK - Jul 8, 04:05 UTCJul 8, 05:50 UTC1h 45m
2026-07-07 NSZ73N EDI → CPH Jul 7, 20:55 UTCJul 7, 22:20 UTC1h 25m
2026-07-07 NSZ3504 - Jul 7, 18:15 UTCJul 7, 20:00 UTC1h 45m
2026-07-07 NSZ3743 OLB → CPH Jul 7, 14:50 UTCJul 7, 17:15 UTC2h 25m

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

Mode-S 4ACA15 frequently asked

What is Mode-S code 4ACA15?
4ACA15 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RPU.
Where is Mode-S 4ACA15 registered?
Mode-S code 4ACA15 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACA15 broadcasting right now?
Yes. Mode-S 4ACA15 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACA15, octal 22545025, decimal 4,901,397.
What flights does 4ACA15 operate?
Mode-S 4ACA15 has broadcast 20 distinct callsigns, including NSZ5GT, NSZ6FY, NSZ5611, NSZ5610, NSZ5619.