Apparatus

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sensors Mode-S transponder

4ACA87

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RTG · BOEING 737 MAX 8

Hex
4ACA87
Octal
22545207
Decimal
4,901,511
Country
SE
Tail
SE-RTG
Type
B38M
Broadcasting now · callsign NSZ2953 · 37,000 ft
Flights observed
222
Distinct callsigns
20
Country
SE
Last broadcast
1h ago

Current position

4ACA87 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4ACA87 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
NSZ2WK Norwegian Air Sweden AOC 6 2026-05-24
NSZ278Y Norwegian Air Sweden AOC 6 2026-05-24
NSZ2613 Norwegian Air Sweden AOC 6 2026-05-26
NSZ6RD Norwegian Air Sweden AOC 5 2026-05-21
NSZ2941 Norwegian Air Sweden AOC 5 2026-05-26
NSZ2940 Norwegian Air Sweden AOC 5 2026-05-26
NSZ2766 Norwegian Air Sweden AOC 5 2026-05-29
NSZ2615 Norwegian Air Sweden AOC 5 2026-05-30
NSZ6HT Norwegian Air Sweden AOC 4 2026-05-28
NSZ5NE Norwegian Air Sweden AOC 4 2026-05-12
NSZ56J Norwegian Air Sweden AOC 4 2026-05-12
NSZ4546 Norwegian Air Sweden AOC 4 2026-05-24
NSZ4545 Norwegian Air Sweden AOC 4 2026-05-24
NSZ2887 Norwegian Air Sweden AOC 4 2026-05-28
NSZ2767 Norwegian Air Sweden AOC 4 2026-05-29
NSZ2614 Norwegian Air Sweden AOC 4 2026-05-30
NSZ83AH Norwegian Air Sweden AOC 3 2026-05-14
NSZ59T Norwegian Air Sweden AOC 3 2026-05-25
NSZ51M Norwegian Air Sweden AOC 3 2026-04-22
NSZ4MF Norwegian Air Sweden AOC 3 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 NSZ2953 CHQ → HEL May 30, 20:50 UTCMay 30, 21:45 UTC55m
2026-05-30 NSZ2952 HEL → CHQ May 30, 16:15 UTCMay 30, 19:40 UTC3h 25m
2026-05-30 NSZ2615 ARN → HEL May 30, 12:55 UTCMay 30, 13:35 UTC40m
2026-05-30 NSZ2614 HEL → ARN May 30, 11:15 UTCMay 30, 11:55 UTC40m
2026-05-30 NSZ2845 SPU → HEL May 30, 07:30 UTCMay 30, 10:05 UTC2h 35m
2026-05-30 NSZ2844 HEL → SPU May 30, 03:40 UTCMay 30, 05:55 UTC2h 15m
2026-05-29 NSZ2529 RVN → HEL May 29, 18:15 UTCMay 29, 19:05 UTC50m
2026-05-29 NSZ2528 HEL → RVN May 29, 16:10 UTCMay 29, 17:00 UTC50m
2026-05-29 NSZ2615 ARN → HEL May 29, 14:35 UTCMay 29, 15:15 UTC40m
2026-05-29 NSZ2614 HEL → ARN May 29, 13:05 UTCMay 29, 13:50 UTC45m
2026-05-29 NSZ2767 LGW → HEL May 29, 09:35 UTCMay 29, 12:05 UTC2h 30m
2026-05-29 NSZ2766 HEL → LGW May 29, 05:10 UTCMay 29, 07:55 UTC2h 45m
2026-05-28 NSZ2887 AGP → HEL May 28, 18:25 UTCMay 28, 22:45 UTC4h 20m
2026-05-28 NSZ6HT HEL → AGP May 28, 13:20 UTCMay 28, 17:30 UTC4h 10m
2026-05-28 NSZ2767 LGW → HEL May 28, 09:45 UTCMay 28, 12:20 UTC2h 35m
2026-05-28 NSZ2766 HEL → LGW May 28, 05:15 UTCMay 28, 07:55 UTC2h 40m
2026-05-27 NSZ2913 ALC → HEL May 27, 19:10 UTCMay 27, 23:20 UTC4h 10m
2026-05-27 NSZ9WP HEL → ALC May 27, 14:05 UTCMay 27, 18:10 UTC4h 5m
2026-05-27 NSZ2845 SPU → HEL May 27, 09:35 UTCMay 27, 12:25 UTC2h 50m
2026-05-27 NSZ2844 HEL → SPU May 27, 05:59 UTCMay 27, 08:30 UTC2h 30m
2026-05-26 NSZ2941 BGY → HEL May 26, 18:40 UTCMay 26, 21:20 UTC2h 40m
2026-05-26 NSZ2940 HEL → BGY May 26, 14:55 UTCMay 26, 17:39 UTC2h 45m
2026-05-26 NSZ2613 ARN → HEL May 26, 13:15 UTCMay 26, 13:54 UTC40m
2026-05-26 NSZ4318 MPL → ARN May 26, 08:34 UTCMay 26, 11:15 UTC2h 40m
2026-05-26 NSZ4317 ARN → MPL May 26, 04:39 UTCMay 26, 07:40 UTC3h 0m
2026-05-25 NSZ60X LGW → ARN May 25, 19:20 UTCMay 25, 21:19 UTC2h 0m
2026-05-25 NSZ59T ARN → LGW May 25, 15:40 UTCMay 25, 18:05 UTC2h 25m
2026-05-25 NSZ4514 HAM → ARN May 25, 13:20 UTCMay 25, 14:35 UTC1h 15m
2026-05-25 NSZ4513 ARN → HAM May 25, 11:05 UTCMay 25, 12:20 UTC1h 15m
2026-05-25 NSZ4378 MXP → ARN May 25, 07:40 UTCMay 25, 10:10 UTC2h 30m
2026-05-25 NSZ4377 ARN → MXP May 25, 04:05 UTCMay 25, 06:25 UTC2h 20m
2026-05-24 NSZ278Y LIS → ARN May 24, 16:55 UTCMay 24, 20:40 UTC3h 45m
2026-05-24 NSZ2WK ARN → LIS May 24, 11:45 UTCMay 24, 15:50 UTC4h 5m
2026-05-24 NSZ4546 OTP → ARN May 24, 07:40 UTCMay 24, 10:25 UTC2h 45m
2026-05-24 NSZ4545 ARN → OTP May 24, 04:25 UTCMay 24, 06:40 UTC2h 15m
2026-05-23 NSZ4344 SJJ → ARN May 23, 18:05 UTCMay 23, 20:30 UTC2h 26m
2026-05-23 NSZ4343 ARN → SJJ May 23, 14:50 UTCMay 23, 17:00 UTC2h 10m
2026-05-23 NSZ44PA ATH → ARN May 23, 10:05 UTCMay 23, 13:35 UTC3h 30m
2026-05-23 NSZ4383 ARN → ATH May 23, 05:40 UTCMay 23, 08:50 UTC3h 10m
2026-05-22 NSZ4470 MAN → ARN May 22, 20:15 UTCMay 22, 22:05 UTC1h 50m
2026-05-22 NSZ4469 ARN → MAN May 22, 16:50 UTCMay 22, 19:00 UTC2h 10m
2026-05-22 NSZ44L LLA → ARN May 22, 14:45 UTCMay 22, 15:50 UTC1h 5m
2026-05-22 NSZ43E ARN → LLA May 22, 12:35 UTCMay 22, 13:30 UTC55m
2026-05-22 NSZ2MP NCE → ARN May 22, 08:55 UTCMay 22, 11:40 UTC2h 45m
2026-05-22 NSZ3YT ARN → NCE May 22, 05:20 UTCMay 22, 07:55 UTC2h 35m
2026-05-21 NSZ278Y LIS → ARN May 21, 18:50 UTCMay 21, 22:25 UTC3h 35m
2026-05-21 NSZ2WK ARN → LIS May 21, 13:35 UTCMay 21, 17:40 UTC4h 5m
2026-05-21 NSZ2621 PRG → ARN May 21, 10:20 UTCMay 21, 11:55 UTC1h 35m
2026-05-21 NSZ2620 ARN → PRG May 21, 07:45 UTCMay 21, 09:20 UTC1h 35m
2026-05-21 NSZ6RD HEL → ARN May 21, 05:35 UTCMay 21, 06:20 UTC45m

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

Mode-S 4ACA87 frequently asked

What is Mode-S code 4ACA87?
4ACA87 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RTG.
Where is Mode-S 4ACA87 registered?
Mode-S code 4ACA87 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACA87 broadcasting right now?
Yes. Mode-S 4ACA87 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACA87, octal 22545207, decimal 4,901,511.
What flights does 4ACA87 operate?
Mode-S 4ACA87 has broadcast 20 distinct callsigns, including NSZ2WK, NSZ278Y, NSZ2613, NSZ6RD, NSZ2941.