Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
Broadcasting now · callsign NSZ3751 · 27,875 ft
Flights observed
455
Distinct callsigns
20
Country
SE
Last broadcast
1h ago

Current position

4ACA46 is currently broadcasting. Map zoomed to live position.

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 21 2026-07-05
NSZ4FU - 21 2026-07-04
NSZ5273 - 11 2026-07-03
NSZ5372 - 10 2026-07-08
NSZ5272 Norwegian Air Sweden AOC 9 2026-05-01
NSZ5261 - 9 2026-07-05
NSZ5ML - 8 2026-06-20
NSZ5352 - 8 2026-06-28
NSZ5283 - 8 2026-07-04
NSZ5260 - 8 2026-07-05
NSZ3LZ - 8 2026-07-08
NSZ3LE - 8 2026-07-08
NSZ5YR - 7 2026-06-25
NSZ5282 - 7 2026-07-04
NSZ3516 - 7 2026-07-13
NSZ1LY - 7 2026-06-25
NSZ5PF - 6 2026-07-07
NSZ3731 - 6 2026-07-12
NSZ3730 - 6 2026-07-12
NSZ5HA - 5 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 NSZ3750 - Jul 14, 12:50 UTCJul 14, 14:30 UTC1h 40m
2026-07-14 NSZ5TP LGW → CPH Jul 14, 09:55 UTCJul 14, 11:20 UTC1h 25m
2026-07-14 NSZ3510 CPH → LGW Jul 14, 06:30 UTCJul 14, 08:25 UTC1h 55m
2026-07-13 NSZ3521 LGW → CPH Jul 13, 20:00 UTCJul 13, 21:25 UTC1h 25m
2026-07-13 NSZ3534 - Jul 13, 17:30 UTCJul 13, 19:00 UTC1h 30m
2026-07-13 NSZ3535 - Jul 13, 15:30 UTCJul 13, 16:45 UTC1h 15m
2026-07-13 NSZ3516 CPH → LGW Jul 13, 12:20 UTCJul 13, 14:15 UTC1h 55m
2026-07-13 NSZ7DE - Jul 13, 08:10 UTCJul 13, 10:55 UTC2h 45m
2026-07-13 NSZ4VC - Jul 13, 04:20 UTCJul 13, 06:50 UTC2h 30m
2026-07-12 NSZ3747 - Jul 12, 19:55 UTCJul 12, 21:35 UTC1h 40m
2026-07-12 NSZ3746 CPH → BLQ Jul 12, 17:01 UTCJul 12, 18:40 UTC1h 40m
2026-07-12 NSZ3637 - Jul 12, 14:20 UTCJul 12, 15:40 UTC1h 20m
2026-07-12 NSZ3636 - Jul 12, 11:35 UTCJul 12, 13:10 UTC1h 35m
2026-07-12 NSZ3731 - Jul 12, 07:50 UTCJul 12, 09:55 UTC2h 5m
2026-07-12 NSZ3730 - Jul 12, 04:20 UTCJul 12, 06:20 UTC2h 0m
2026-07-11 NSZ3743 - Jul 11, 21:30 UTCJul 11, 23:45 UTC2h 15m
2026-07-11 NSZ3742 CPH → OLB Jul 11, 18:15 UTCJul 11, 20:35 UTC2h 20m
2026-07-11 NSZ3231 - Jul 11, 16:35 UTCJul 11, 17:30 UTC55m
2026-07-11 NSZ3230 CPH → OSL Jul 11, 14:20 UTCJul 11, 15:10 UTC50m
2026-07-11 NSZ3661 ALC → CPH Jul 11, 10:15 UTCJul 11, 13:10 UTC2h 55m
2026-07-11 NSZ3660 CPH → ALC Jul 11, 06:05 UTCJul 11, 09:05 UTC3h 0m
2026-07-10 NSZ3097 AAL → CPH Jul 10, 18:50 UTCJul 10, 19:15 UTC25m
2026-07-10 NSZ2NZ CPH → AAL Jul 10, 17:40 UTCJul 10, 18:10 UTC30m
2026-07-10 NSZ3631 BSL → CPH Jul 10, 15:25 UTCJul 10, 16:55 UTC1h 30m
2026-07-10 NSZ3630 CPH → BSL Jul 10, 13:10 UTCJul 10, 14:40 UTC1h 30m
2026-07-10 NSZ3627 TLS → CPH Jul 10, 09:50 UTCJul 10, 11:55 UTC2h 5m
2026-07-10 NSZ3626 CPH → TLS Jul 10, 06:35 UTCJul 10, 08:45 UTC2h 10m
2026-07-09 NSZ3659 BCN → CPH Jul 9, 19:15 UTCJul 9, 21:45 UTC2h 30m
2026-07-09 NSZ3658 CPH → BCN Jul 9, 15:20 UTCJul 9, 17:45 UTC2h 25m
2026-07-09 NSZ89C PRG → CPH Jul 9, 13:00 UTCJul 9, 14:05 UTC1h 5m
2026-07-09 NSZ8ML CPH → PRG Jul 9, 11:10 UTCJul 9, 12:05 UTC55m
2026-07-09 NSZ3731 - Jul 9, 08:00 UTCJul 9, 10:10 UTC2h 10m
2026-07-09 NSZ3730 - Jul 9, 04:30 UTCJul 9, 06:25 UTC1h 55m
2026-07-08 NSZ3283 - Jul 8, 21:10 UTCJul 8, 23:00 UTC1h 50m
2026-07-08 NSZ3282 - Jul 8, 18:45 UTCJul 8, 20:10 UTC1h 25m
2026-07-08 NSZ5372 ALC → CPH Jul 8, 14:40 UTCJul 8, 17:45 UTC3h 5m
2026-07-08 NSZ3LE ARN → ALC Jul 8, 10:00 UTCJul 8, 13:25 UTC3h 25m
2026-07-08 NSZ3LZ - Jul 8, 05:20 UTCJul 8, 09:00 UTC3h 40m
2026-07-07 NSZ59FZ - Jul 7, 18:20 UTCJul 7, 21:15 UTC2h 55m
2026-07-07 NSZ5336 ALC → SVG Jul 7, 14:05 UTCJul 7, 17:25 UTC3h 20m
2026-07-07 NSZ8WY BGO → ALC Jul 7, 09:35 UTCJul 7, 12:40 UTC3h 5m
2026-07-07 NSZ5PF ALC → BGO Jul 7, 05:15 UTCJul 7, 08:45 UTC3h 30m
2026-07-06 NSZ5335 BGO → ALC Jul 6, 18:45 UTCJul 6, 22:05 UTC3h 20m
2026-07-06 NSZ5PF ALC → BGO Jul 6, 14:25 UTCJul 6, 17:50 UTC3h 25m
2026-07-06 NSZ5421 HEL → ALC Jul 6, 09:20 UTCJul 6, 13:25 UTC4h 5m
2026-07-06 NSZ5420 - Jul 6, 04:10 UTCJul 6, 08:20 UTC4h 10m
2026-07-05 NSZ5375 CPH → ALC Jul 5, 19:50 UTCJul 5, 22:40 UTC2h 50m
2026-07-05 NSZ5372 ALC → CPH Jul 5, 15:55 UTCJul 5, 18:55 UTC3h 0m
2026-07-05 NSZ5357 GOT → ALC Jul 5, 11:35 UTCJul 5, 14:40 UTC3h 5m
2026-07-05 NSZ5261 - Jul 5, 08:45 UTCJul 5, 10:20 UTC1h 35m

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?
Yes. Mode-S 4ACA46 is currently airborne.
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, NSZ5372, NSZ5272.