Apparatus

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sensors Mode-S transponder

4ACA04

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RPD · BOEING 737-800

Hex
4ACA04
Octal
22545004
Decimal
4,901,380
Country
SE
Tail
SE-RPD
Type
B738
Broadcasting now · callsign NSZ4KP · 37,525 ft
Flights observed
513
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 23:00 UTC

Current position

4ACA04 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4ACA04 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 Norwegian Air Sweden AOC 12 2026-07-26
NSZ6FY Norwegian Air Sweden AOC 11 2026-07-26
NSZ5610 Norwegian Air Sweden AOC 10 2026-07-26
NSZ5PF - 9 2026-07-05
NSZ5611 Norwegian Air Sweden AOC 9 2026-07-26
NSZ8WY - 7 2026-07-05
NSZ5352 - 7 2026-07-04
NSZ5HA - 6 2026-07-04
NSZ5357 Norwegian Air Sweden AOC 6 2026-06-22
NSZ4FU - 6 2026-06-21
NSZ3303 Norwegian Air Sweden AOC 6 2026-06-06
NSZ3302 Norwegian Air Sweden AOC 5 2026-06-06
NSZ9BH Norwegian Air Sweden AOC 4 2026-06-09
NSZ92L Norwegian Air Sweden AOC 4 2026-07-24
NSZ8HW Norwegian Air Sweden AOC 4 2026-07-24
NSZ89C Norwegian Air Sweden AOC 4 2026-06-03
NSZ7VR Norwegian Air Sweden AOC 4 2026-05-25
NSZ6UK Norwegian Air Sweden AOC 4 2026-05-25
NSZ61RT Norwegian Air Sweden AOC 4 2026-07-22
NSZ56KH Norwegian Air Sweden AOC 4 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 NSZ5GT PMI → ARN Jul 26, 21:00 UTCJul 26, 23:00 UTC2h 0m
2026-07-26 NSZ6FY PMI → ARN Jul 26, 16:30 UTCJul 26, 19:50 UTC3h 20m
2026-07-26 NSZ5611 CPH → PMI Jul 26, 10:35 UTCJul 26, 13:15 UTC2h 40m
2026-07-26 NSZ5610 PMI → CPH Jul 26, 05:50 UTCJul 26, 08:20 UTC2h 31m
2026-07-25 NSZ5619 BLL → PMI Jul 25, 20:35 UTCJul 25, 23:00 UTC2h 25m
2026-07-25 NSZ5618 PMI → BLL Jul 25, 17:05 UTCJul 25, 19:45 UTC2h 40m
2026-07-25 NSZ5631 SVG → PMI Jul 25, 13:05 UTCJul 25, 15:55 UTC2h 50m
2026-07-25 NSZ5630 PMI → SVG Jul 25, 09:00 UTCJul 25, 11:50 UTC2h 50m
2026-07-24 NSZ92L OSL → PMI Jul 24, 18:25 UTCJul 24, 21:30 UTC3h 5m
2026-07-24 NSZ8HW PMI → OSL Jul 24, 14:05 UTCJul 24, 17:20 UTC3h 15m
2026-07-24 NSZ9211 CPH → PMI Jul 24, 09:10 UTCJul 24, 12:20 UTC3h 10m
2026-07-24 NSZ9210 - Jul 24, 04:40 UTCJul 24, 07:50 UTC3h 10m
2026-07-23 NSZ5617 AAR → PMI Jul 23, 19:00 UTCJul 23, 21:15 UTC2h 15m
2026-07-23 NSZ5616 PMI → AAR Jul 23, 15:10 UTCJul 23, 18:00 UTC2h 50m
2026-07-23 NSZ5603 ARN → PMI Jul 23, 10:05 UTCJul 23, 13:00 UTC2h 55m
2026-07-23 NSZ5602 PMI → ARN Jul 23, 05:45 UTCJul 23, 09:05 UTC3h 20m
2026-07-22 NSZ61RT AAL → PMI Jul 22, 17:40 UTCJul 22, 20:15 UTC2h 35m
2026-07-22 NSZ56KH PMI → AAL Jul 22, 14:00 UTCJul 22, 16:50 UTC2h 50m
2026-07-22 NSZ5627 BGO → PMI Jul 22, 11:10 UTCJul 22, 12:55 UTC1h 45m
2026-07-21 NSZ5GT PMI → ARN Jul 21, 18:10 UTCJul 21, 21:25 UTC3h 15m
2026-07-21 NSZ6FY PMI → ARN Jul 21, 13:55 UTCJul 21, 17:10 UTC3h 15m
2026-07-21 NSZ5631 SVG → PMI Jul 21, 09:45 UTCJul 21, 12:35 UTC2h 50m
2026-07-21 NSZ5630 PMI → SVG Jul 21, 05:40 UTCJul 21, 08:45 UTC3h 5m
2026-07-20 NSZ5613 CPH → PMI Jul 20, 18:30 UTCJul 20, 21:05 UTC2h 35m
2026-07-20 NSZ5612 PMI → CPH Jul 20, 14:55 UTCJul 20, 17:25 UTC2h 30m
2026-07-20 NSZ5611 - Jul 20, 09:25 UTCJul 20, 11:55 UTC2h 30m
2026-07-20 NSZ5610 - Jul 20, 05:45 UTCJul 20, 08:15 UTC2h 30m
2026-07-19 NSZ5GT - Jul 19, 18:35 UTCJul 19, 21:50 UTC3h 15m
2026-07-19 NSZ6FY - Jul 19, 14:25 UTCJul 19, 17:25 UTC3h 0m
2026-07-19 NSZ5611 - Jul 19, 09:35 UTCJul 19, 12:10 UTC2h 35m
2026-07-19 NSZ5610 - Jul 19, 05:45 UTCJul 19, 08:15 UTC2h 30m
2026-07-18 NSZ61RT AAL → PMI Jul 18, 17:55 UTCJul 18, 20:35 UTC2h 40m
2026-07-18 NSZ56KH PMI → AAL Jul 18, 14:20 UTCJul 18, 17:05 UTC2h 45m
2026-07-18 NSZ5627 - Jul 18, 09:55 UTCJul 18, 12:55 UTC3h 0m
2026-07-18 NSZ5626 - Jul 18, 05:50 UTCJul 18, 08:45 UTC2h 55m
2026-07-17 NSZ92L OSL → PMI Jul 17, 19:05 UTCJul 17, 22:20 UTC3h 15m
2026-07-17 NSZ8HW PMI → OSL Jul 17, 14:39 UTCJul 17, 17:50 UTC3h 10m
2026-07-17 NSZ9211 CPH → PMI Jul 17, 09:35 UTCJul 17, 12:50 UTC3h 15m
2026-07-17 NSZ9210 - Jul 17, 04:39 UTCJul 17, 07:40 UTC3h 0m
2026-07-16 NSZ5617 - Jul 16, 18:29 UTCJul 16, 21:19 UTC2h 50m
2026-07-16 NSZ5616 - Jul 16, 15:05 UTCJul 16, 17:35 UTC2h 30m
2026-07-16 NSZ5603 - Jul 16, 10:04 UTCJul 16, 13:34 UTC3h 30m
2026-07-16 NSZ5602 - Jul 16, 05:45 UTCJul 16, 09:00 UTC3h 15m
2026-07-15 NSZ92L - Jul 15, 18:35 UTCJul 15, 21:35 UTC3h 0m
2026-07-15 NOZ1WC VIE → OSL Jul 15, 12:30 UTCJul 15, 14:25 UTC1h 55m
2026-07-15 NOZ2WA OSL → VIE Jul 15, 09:10 UTCJul 15, 11:05 UTC1h 55m
2026-07-14 NOZ643 BGO → OSL Jul 14, 19:15 UTCJul 14, 19:55 UTC40m
2026-07-14 NOZ624 - Jul 14, 18:05 UTCJul 14, 18:40 UTC35m
2026-07-14 NSZ8HW - Jul 14, 13:15 UTCJul 14, 16:30 UTC3h 15m
2026-07-14 NSZ5611 - Jul 14, 09:25 UTCJul 14, 11:55 UTC2h 30m

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

Mode-S 4ACA04 frequently asked

What is Mode-S code 4ACA04?
4ACA04 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RPD.
Where is Mode-S 4ACA04 registered?
Mode-S code 4ACA04 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACA04 broadcasting right now?
Yes. Mode-S 4ACA04 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACA04, octal 22545004, decimal 4,901,380.
What flights does 4ACA04 operate?
Mode-S 4ACA04 has broadcast 20 distinct callsigns, including NSZ5GT, NSZ6FY, NSZ5610, NSZ5PF, NSZ5611.