Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
No current signal · last broadcast 3h ago
Flights observed
448
Distinct callsigns
20
Country
SE
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 4ACA87.

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
NSZ2613 - 10 2026-07-13
NSZ2WK - 9 2026-07-02
NSZ278Y - 9 2026-07-02
NSZ6RD - 8 2026-07-13
NSZ5NE - 8 2026-07-02
NSZ56J Norwegian Air Sweden AOC 8 2026-07-02
NSZ2615 - 7 2026-07-14
NSZ6HT Norwegian Air Sweden AOC 6 2026-06-05
NSZ4508 - 6 2026-07-06
NSZ4507 - 6 2026-07-06
NSZ3YT - 6 2026-07-04
NSZ2MP Norwegian Air Sweden AOC 6 2026-07-04
NSZ2941 - 6 2026-07-09
NSZ2940 - 6 2026-07-09
NSZ2621 - 6 2026-07-13
NSZ2620 - 6 2026-07-13
NSZ83AH - 5 2026-07-12
NSZ51M - 5 2026-07-08
NSZ4MF - 5 2026-07-06
NSZ4546 - 5 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 NSZ2831 - Jul 14, 20:50 UTCJul 14, 23:30 UTC2h 39m
2026-07-14 NSZ2830 - Jul 14, 16:50 UTCJul 14, 19:15 UTC2h 25m
2026-07-14 NSZ2615 ARN → HEL Jul 14, 14:45 UTCJul 14, 15:30 UTC45m
2026-07-14 NSZ4BP HEL → ARN Jul 14, 13:10 UTCJul 14, 13:55 UTC45m
2026-07-14 NSZ6FV ATH → HEL Jul 14, 08:45 UTCJul 14, 12:05 UTC3h 20m
2026-07-14 NSZ2962 HEL → ATH Jul 14, 04:00 UTCJul 14, 07:25 UTC3h 25m
2026-07-13 NSZ2863 - Jul 13, 18:25 UTCJul 13, 20:50 UTC2h 25m
2026-07-13 NSZ2862 - Jul 13, 14:35 UTCJul 13, 17:05 UTC2h 30m
2026-07-13 NSZ2613 ARN → HEL Jul 13, 12:50 UTCJul 13, 13:30 UTC40m
2026-07-13 NSZ2621 PRG → ARN Jul 13, 10:20 UTCJul 13, 11:50 UTC1h 30m
2026-07-13 NSZ2620 ARN → PRG Jul 13, 07:30 UTCJul 13, 09:05 UTC1h 35m
2026-07-13 NSZ6RD HEL → ARN Jul 13, 05:40 UTCJul 13, 06:25 UTC45m
2026-07-12 NSZ2913 ALC → HEL Jul 12, 21:00 UTCJul 13, 00:50 UTC3h 50m
2026-07-12 NSZ9WP - Jul 12, 15:50 UTCJul 12, 19:55 UTC4h 5m
2026-07-12 NSZ83AH - Jul 12, 09:20 UTCJul 12, 13:20 UTC4h 0m
2026-07-12 NSZ4AW - Jul 12, 03:45 UTCJul 12, 08:15 UTC4h 30m
2026-07-11 NSZ2953 - Jul 11, 21:20 UTCJul 12, 00:50 UTC3h 30m
2026-07-11 NSZ2952 - Jul 11, 16:35 UTCJul 11, 20:00 UTC3h 25m
2026-07-11 NSZ2615 ARN → HEL Jul 11, 12:55 UTCJul 11, 13:40 UTC45m
2026-07-11 NSZ4BP HEL → ARN Jul 11, 11:15 UTCJul 11, 12:00 UTC45m
2026-07-11 NSZ23PH PSA → HEL Jul 11, 07:20 UTCJul 11, 10:10 UTC2h 50m
2026-07-11 NSZ2942 HEL → PSA Jul 11, 03:25 UTCJul 11, 06:15 UTC2h 50m
2026-07-10 NSZ2863 - Jul 10, 18:05 UTCJul 10, 20:40 UTC2h 35m
2026-07-10 NSZ2862 - Jul 10, 14:40 UTCJul 10, 17:00 UTC2h 20m
2026-07-10 NSZ2613 ARN → HEL Jul 10, 12:45 UTCJul 10, 13:30 UTC45m
2026-07-10 NSZ2621 PRG → ARN Jul 10, 10:15 UTCJul 10, 11:50 UTC1h 35m
2026-07-10 NSZ2620 ARN → PRG Jul 10, 07:25 UTCJul 10, 08:50 UTC1h 25m
2026-07-10 NSZ6RD HEL → ARN Jul 10, 05:35 UTCJul 10, 06:15 UTC40m
2026-07-09 NSZ2941 - Jul 9, 18:20 UTCJul 9, 21:10 UTC2h 50m
2026-07-09 NSZ2940 - Jul 9, 15:00 UTCJul 9, 17:30 UTC2h 30m
2026-07-09 NSZ2613 ARN → HEL Jul 9, 13:15 UTCJul 9, 14:00 UTC45m
2026-07-09 NSZ4546 - Jul 9, 09:35 UTCJul 9, 12:10 UTC2h 35m
2026-07-09 NSZ4545 - Jul 9, 06:10 UTCJul 9, 08:25 UTC2h 15m
2026-07-08 NSZ4382 RHO → ARN Jul 8, 18:15 UTCJul 8, 22:05 UTC3h 50m
2026-07-08 NSZ4381 ARN → RHO Jul 8, 13:40 UTCJul 8, 17:05 UTC3h 25m
2026-07-08 NSZ2ES LGW → ARN Jul 8, 10:20 UTCJul 8, 12:35 UTC2h 15m
2026-07-08 NSZ51M ARN → LGW Jul 8, 06:50 UTCJul 8, 08:50 UTC2h 0m
2026-07-07 NSZ5YD - Jul 7, 15:30 UTCJul 7, 18:30 UTC3h 0m
2026-07-07 NSZ4257 - Jul 7, 11:25 UTCJul 7, 14:25 UTC3h 0m
2026-07-07 NSZ4502 MUC → ARN Jul 7, 08:20 UTCJul 7, 10:05 UTC1h 45m
2026-07-07 NSZ4501 ARN → MUC Jul 7, 05:25 UTCJul 7, 07:10 UTC1h 45m
2026-07-06 NSZ4MF BCN → ARN Jul 6, 18:55 UTCJul 6, 22:05 UTC3h 10m
2026-07-06 NSZ3MB ARN → BCN Jul 6, 14:45 UTCJul 6, 17:45 UTC3h 0m
2026-07-06 NSZ4508 BER → ARN Jul 6, 12:20 UTCJul 6, 13:50 UTC1h 30m
2026-07-06 NSZ4507 ARN → BER Jul 6, 09:50 UTCJul 6, 11:05 UTC1h 15m
2026-07-06 NSZ38K - Jul 6, 07:35 UTCJul 6, 08:35 UTC1h 0m
2026-07-06 NSZ35A - Jul 6, 05:40 UTCJul 6, 06:35 UTC55m
2026-07-05 NSZ4508 BER → ARN Jul 5, 20:25 UTCJul 5, 21:45 UTC1h 20m
2026-07-05 NSZ4507 ARN → BER Jul 5, 18:20 UTCJul 5, 19:35 UTC1h 15m
2026-07-05 NSZ4502 MUC → ARN Jul 5, 15:25 UTCJul 5, 17:15 UTC1h 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-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?
No active broadcast right now. Last signal was 3h ago.
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 NSZ2613, NSZ2WK, NSZ278Y, NSZ6RD, NSZ5NE.