Apparatus

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sensors Mode-S transponder

4ACA46

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RRF · BOEING 737-800

Hex
4ACA46
Octal
22545106
Decimal
4,901,446
Country
SE
Tail
SE-RRF
Type
B738
No current signal · last broadcast 8h ago
Flights observed
202
Distinct callsigns
20
Country
SE
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 4ACA46.

Country allocation

The ICAO 24-bit address 4ACA46 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
NSZ5357 Norwegian Air Sweden AOC 16 2026-05-03
NSZ4FU Norwegian Air Sweden AOC 16 2026-05-02
NSZ5273 Norwegian Air Sweden AOC 9 2026-05-01
NSZ5272 Norwegian Air Sweden AOC 9 2026-05-01
NSZ5372 Norwegian Air Sweden AOC 8 2026-05-23
NSZ5ML Norwegian Air Sweden AOC 7 2026-05-23
NSZ5YR Norwegian Air Sweden AOC 6 2026-05-22
NSZ5283 Norwegian Air Sweden AOC 6 2026-05-02
NSZ3LZ Norwegian Air Sweden AOC 6 2026-05-20
NSZ3LE Norwegian Air Sweden AOC 6 2026-05-20
NSZ1LY Norwegian Air Sweden AOC 6 2026-05-22
NSZ5282 Norwegian Air Sweden AOC 5 2026-05-02
NSZ5261 Norwegian Air Sweden AOC 5 2026-05-03
NSZ5260 Norwegian Air Sweden AOC 5 2026-05-03
NSZ5431 Norwegian Air Sweden AOC 4 2026-05-22
NSZ5430 Norwegian Air Sweden AOC 4 2026-05-22
NSZ5331 Norwegian Air Sweden AOC 4 2026-05-24
NSZ8WY Norwegian Air Sweden AOC 3 2026-05-24
NSZ6ZD Norwegian Air Sweden AOC 3 2026-05-21
NSZ6GR Norwegian Air Sweden AOC 3 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 NSZ3755 LJU → CPH May 29, 18:50 UTCMay 29, 20:30 UTC1h 40m
2026-05-29 NSZ3754 CPH → LJU May 29, 16:10 UTCMay 29, 17:35 UTC1h 25m
2026-05-29 NSZ3631 BSL → CPH May 29, 13:45 UTCMay 29, 15:20 UTC1h 35m
2026-05-29 NSZ3630 CPH → BSL May 29, 11:10 UTCMay 29, 12:25 UTC1h 15m
2026-05-29 NSZ7VR PSA → CPH May 29, 08:20 UTCMay 29, 10:15 UTC1h 55m
2026-05-29 NSZ6UK CPH → PSA May 29, 05:20 UTCMay 29, 07:20 UTC2h 0m
2026-05-28 NSZ2RT ARN → CPH May 28, 17:45 UTCMay 28, 18:35 UTC50m
2026-05-28 NSZ8MV CPH → ARN May 28, 16:05 UTCMay 28, 17:00 UTC55m
2026-05-28 NSZ3631 BSL → CPH May 28, 13:50 UTCMay 28, 15:10 UTC1h 20m
2026-05-28 NSZ3630 CPH → BSL May 28, 11:40 UTCMay 28, 13:05 UTC1h 25m
2026-05-27 NSZ3741 VCE → CPH May 27, 14:35 UTCMay 27, 16:20 UTC1h 45m
2026-05-27 NSZ3740 CPH → VCE May 27, 11:50 UTCMay 27, 13:35 UTC1h 45m
2026-05-27 NSZ5KA BUD → CPH May 27, 08:55 UTCMay 27, 10:35 UTC1h 40m
2026-05-27 NSZ55YN CPH → BUD May 27, 06:49 UTCMay 27, 08:15 UTC1h 25m
2026-05-26 NSZ7WJ LIS → CPH May 26, 15:05 UTCMay 26, 18:05 UTC3h 0m
2026-05-26 NSZ3616 CPH → LIS May 26, 10:14 UTCMay 26, 13:54 UTC3h 40m
2026-05-26 NSZ37A ALC → CPH May 26, 05:15 UTCMay 26, 08:15 UTC3h 0m
2026-05-25 NSZ59FZ SVG → ALC May 25, 18:45 UTCMay 25, 21:54 UTC3h 9m
2026-05-25 NSZ5336 ALC → SVG May 25, 14:55 UTCMay 25, 17:50 UTC2h 55m
2026-05-25 NSZ5421 HEL → ALC May 25, 09:15 UTCMay 25, 13:15 UTC4h 0m
2026-05-25 NSZ5420 ALC → HEL May 25, 04:15 UTCMay 25, 08:20 UTC4h 5m
2026-05-24 NSZ5331 TRF → ALC May 24, 17:50 UTCMay 24, 21:05 UTC3h 15m
2026-05-24 NSZ5330 ALC → TRF May 24, 13:30 UTCMay 24, 16:45 UTC3h 15m
2026-05-24 NSZ8WY BGO → ALC May 24, 09:15 UTCMay 24, 12:20 UTC3h 5m
2026-05-24 NSZ5PF ALC → BGO May 24, 05:10 UTCMay 24, 08:25 UTC3h 15m
2026-05-23 NSZ5ML CPH → ALC May 23, 20:30 UTCMay 23, 23:20 UTC2h 50m
2026-05-23 NSZ5372 ALC → CPH May 23, 16:45 UTCMay 23, 19:40 UTC2h 56m
2026-05-23 NSZ8DS HAU → ALC May 23, 12:40 UTCMay 23, 15:45 UTC3h 5m
2026-05-23 NSZ8922 ARN → LYS May 23, 11:25 UTCMay 23, 11:35 UTC10m
2026-05-23 NSZ2WP ALC → HAU May 23, 05:15 UTCMay 23, 08:25 UTC3h 10m
2026-05-22 NSZ1LY OSL → ALC May 22, 18:10 UTCMay 22, 21:30 UTC3h 20m
2026-05-22 NSZ5YR ALC → OSL May 22, 13:45 UTCMay 22, 17:05 UTC3h 20m
2026-05-22 NSZ5431 MUC → MUC May 22, 10:20 UTCMay 22, 12:25 UTC2h 5m
2026-05-22 NSZ5430 ALC → MUC May 22, 07:05 UTCMay 22, 09:10 UTC2h 5m
2026-05-21 NSZ1LY OSL → ALC May 21, 18:00 UTCMay 21, 21:30 UTC3h 30m
2026-05-21 NSZ5YR ALC → OSL May 21, 13:40 UTCMay 21, 17:05 UTC3h 25m
2026-05-21 NSZ6ZD VXO → ALC May 21, 09:20 UTCMay 21, 12:30 UTC3h 10m
2026-05-21 NSZ6GR ALC → VXO May 21, 05:20 UTCMay 21, 08:35 UTC3h 15m
2026-05-20 NSZ5ML CPH → ALC May 20, 18:50 UTCMay 20, 21:40 UTC2h 50m
2026-05-20 NSZ5372 ALC → CPH May 20, 14:55 UTCMay 20, 18:00 UTC3h 5m
2026-05-20 NSZ3LE ARN → ALC May 20, 09:55 UTCMay 20, 13:25 UTC3h 30m
2026-05-20 NSZ3LZ ALC → ARN May 20, 05:05 UTCMay 20, 08:50 UTC3h 45m
2026-05-19 NSZ5341 AES → ALC May 19, 19:00 UTCMay 19, 22:30 UTC3h 30m
2026-05-19 NSZ5340 ALC → AES May 19, 14:10 UTCMay 19, 17:30 UTC3h 20m
2026-05-19 NSZ3LE ARN → ALC May 19, 09:20 UTCMay 19, 12:50 UTC3h 30m
2026-05-19 NSZ3LZ ALC → ARN May 19, 04:45 UTCMay 19, 08:25 UTC3h 40m
2026-05-18 NSZ1LY OSL → ALC May 18, 18:25 UTCMay 18, 21:40 UTC3h 14m
2026-05-18 NSZ5YR ALC → OSL May 18, 13:40 UTCMay 18, 17:15 UTC3h 35m
2026-05-18 NSZ6WH BLL → ALC May 18, 09:35 UTCMay 18, 12:15 UTC2h 40m
2026-05-18 NSZ5380 ALC → BLL May 18, 05:45 UTCMay 18, 08:35 UTC2h 50m

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

Mode-S 4ACA46 frequently asked

What is Mode-S code 4ACA46?
4ACA46 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RRF.
Where is Mode-S 4ACA46 registered?
Mode-S code 4ACA46 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACA46 broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACA46, octal 22545106, decimal 4,901,446.
What flights does 4ACA46 operate?
Mode-S 4ACA46 has broadcast 20 distinct callsigns, including NSZ5357, NSZ4FU, NSZ5273, NSZ5272, NSZ5372.