Apparatus

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sensors Mode-S transponder

4ACA0A

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RPJ · BOEING 737-800

Hex
4ACA0A
Octal
22545012
Decimal
4,901,386
Country
SE
Tail
SE-RPJ
Type
B738
Broadcasting now · callsign NSZ5273 · 38,000 ft
Flights observed
468
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 19:05 UTC

Current position

4ACA0A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4ACA0A 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 - 17 2026-06-15
NSZ6FY - 16 2026-06-15
NSZ5611 Norwegian Air Sweden AOC 11 2026-06-15
NSZ5610 - 10 2026-06-16
NSZ5619 Norwegian Air Sweden AOC 7 2026-06-13
NSZ5618 Norwegian Air Sweden AOC 7 2026-06-13
NSZ4FU Norwegian Air Sweden AOC 6 2026-07-26
NSZ2047 Norwegian Air Sweden AOC 6 2026-06-26
NSZ2046 - 6 2026-06-26
NSZ2031 - 6 2026-06-26
NSZ2030 - 6 2026-06-26
NSZ5357 - 5 2026-07-12
NSZ8CM Norwegian Air Sweden AOC 4 2026-06-13
NSZ6PQ Norwegian Air Sweden AOC 4 2026-06-13
NSZ5YR Norwegian Air Sweden AOC 4 2026-07-25
NSZ2067 - 4 2026-06-29
NSZ2066 - 4 2026-06-29
NSZ2063 - 4 2026-06-28
NSZ2062 - 4 2026-06-29
NSZ2011 - 4 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 NSZ4FU ALC → GOT Jul 26, 15:45 UTCJul 26, 19:05 UTC3h 20m
2026-07-26 NSZ3LE ARN → ALC Jul 26, 09:45 UTCJul 26, 13:20 UTC3h 35m
2026-07-26 NSZ3LZ ALC → ARN Jul 26, 05:10 UTCJul 26, 08:40 UTC3h 31m
2026-07-25 NSZ1LY OSL → ALC Jul 25, 18:35 UTCJul 25, 22:05 UTC3h 30m
2026-07-25 NSZ5YR ALC → OSL Jul 25, 13:55 UTCJul 25, 17:35 UTC3h 40m
2026-07-25 NSZ8DS HAU → ALC Jul 25, 09:05 UTCJul 25, 12:15 UTC3h 10m
2026-07-25 NSZ2WP ALC → HAU Jul 25, 05:00 UTCJul 25, 08:00 UTC3h 0m
2026-07-24 NSZ59FZ SVG → ALC Jul 24, 18:30 UTCJul 24, 21:45 UTC3h 15m
2026-07-24 NSZ5336 ALC → SVG Jul 24, 14:25 UTCJul 24, 17:30 UTC3h 5m
2026-07-24 NSZ8KP AAR → ALC Jul 24, 09:05 UTCJul 24, 11:55 UTC2h 50m
2026-07-24 NSZ6ZU ALC → ALC Jul 24, 04:55 UTCJul 24, 07:55 UTC3h 0m
2026-07-23 NSZ1LY OSL → ALC Jul 23, 18:10 UTCJul 23, 21:25 UTC3h 15m
2026-07-23 NSZ5YR ALC → OSL Jul 23, 13:45 UTCJul 23, 17:20 UTC3h 35m
2026-07-23 NSZ6ZD VXO → ALC Jul 23, 09:35 UTCJul 23, 12:30 UTC2h 55m
2026-07-23 NSZ6GR ALC → VXO Jul 23, 05:25 UTCJul 23, 08:35 UTC3h 10m
2026-07-22 NSZ8DS HAU → ALC Jul 22, 18:30 UTCJul 22, 21:30 UTC3h 0m
2026-07-22 NSZ2WP ALC → HAU Jul 22, 14:15 UTCJul 22, 17:35 UTC3h 20m
2026-07-22 NSZ8WY BGO → ALC Jul 22, 10:20 UTCJul 22, 12:50 UTC2h 30m
2026-07-22 NSZ5PF ALC → BGO Jul 22, 05:15 UTCJul 22, 05:25 UTC10m
2026-07-21 NSZ1LY OSL → ALC Jul 21, 18:20 UTCJul 21, 21:40 UTC3h 20m
2026-07-21 NSZ5YR ALC → OSL Jul 21, 13:45 UTCJul 21, 17:25 UTC3h 40m
2026-07-21 NSZ5379 AAL → ALC Jul 21, 09:20 UTCJul 21, 12:15 UTC2h 55m
2026-07-21 NSZ5378 ALC → AAL Jul 21, 05:05 UTCJul 21, 08:10 UTC3h 5m
2026-07-20 NSZ5335 BGO → ALC Jul 20, 18:45 UTCJul 20, 22:05 UTC3h 20m
2026-07-20 NSZ5PF ALC → BGO Jul 20, 14:30 UTCJul 20, 18:00 UTC3h 30m
2026-07-20 NSZ5421 HEL → ALC Jul 20, 09:10 UTCJul 20, 13:10 UTC4h 0m
2026-07-20 NSZ5420 ALC → HEL Jul 20, 04:05 UTCJul 20, 07:50 UTC3h 45m
2026-07-19 NSZ9MC - Jul 19, 18:50 UTCJul 19, 22:20 UTC3h 30m
2026-07-19 NSZ5352 - Jul 19, 14:05 UTCJul 19, 17:30 UTC3h 25m
2026-07-19 NSZ5321 - Jul 19, 09:35 UTCJul 19, 12:55 UTC3h 20m
2026-07-19 NSZ5320 ALC → OSL Jul 19, 05:20 UTCJul 19, 08:40 UTC3h 20m
2026-07-18 NSZ5ML - Jul 18, 18:45 UTCJul 18, 21:50 UTC3h 5m
2026-07-18 NSZ3231 - Jul 18, 16:00 UTCJul 18, 16:50 UTC50m
2026-07-18 NSZ3230 - Jul 18, 14:05 UTCJul 18, 14:55 UTC50m
2026-07-18 NSZ3661 - Jul 18, 10:05 UTCJul 18, 12:55 UTC2h 50m
2026-07-18 NSZ3660 - Jul 18, 06:00 UTCJul 18, 09:00 UTC3h 0m
2026-07-17 NSZ3287 SPU → CPH Jul 17, 20:29 UTCJul 17, 22:10 UTC1h 40m
2026-07-17 NSZ3288 - Jul 17, 17:25 UTCJul 17, 19:00 UTC1h 35m
2026-07-17 NSZ3159 HEL → HEL Jul 17, 15:05 UTCJul 17, 16:24 UTC1h 20m
2026-07-17 NSZ3158 CPH → CPH Jul 17, 13:00 UTCJul 17, 14:10 UTC1h 10m
2026-07-17 NSZ7VR PSA → CPH Jul 17, 10:05 UTCJul 17, 11:55 UTC1h 50m
2026-07-17 NSZ6UK CPH → PSA Jul 17, 06:25 UTCJul 17, 08:30 UTC2h 5m
2026-07-16 NSZ73N - Jul 16, 18:40 UTCJul 16, 20:09 UTC1h 30m
2026-07-16 NSZ3504 CPH → EDI Jul 16, 16:25 UTCJul 16, 17:49 UTC1h 25m
2026-07-16 NSZ3289 - Jul 16, 13:34 UTCJul 16, 15:14 UTC1h 40m
2026-07-16 NSZ3288 - Jul 16, 10:40 UTCJul 16, 12:20 UTC1h 40m
2026-07-16 NSZ3501 - Jul 16, 08:05 UTCJul 16, 09:40 UTC1h 35m
2026-07-16 NSZ3500 - Jul 16, 05:20 UTCJul 16, 06:45 UTC1h 25m
2026-07-15 NSZ3283 - Jul 15, 22:10 UTCJul 15, 23:50 UTC1h 40m
2026-07-15 NSZ3282 - Jul 15, 19:40 UTCJul 15, 21:15 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-RPJ page for operator, model, and routing details .

Mode-S 4ACA0A frequently asked

What is Mode-S code 4ACA0A?
4ACA0A is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RPJ.
Where is Mode-S 4ACA0A registered?
Mode-S code 4ACA0A is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACA0A broadcasting right now?
Yes. Mode-S 4ACA0A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACA0A, octal 22545012, decimal 4,901,386.
What flights does 4ACA0A operate?
Mode-S 4ACA0A has broadcast 20 distinct callsigns, including NSZ5GT, NSZ6FY, NSZ5611, NSZ5610, NSZ5619.