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 NSZ2890 · 11,725 ft
Flights observed
499
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 21:45 UTC

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
NSZ2613 - 11 2026-07-16
NSZ6HT Norwegian Air Sweden AOC 10 2026-07-23
NSZ6RD - 9 2026-07-16
NSZ2WK - 9 2026-07-02
NSZ278Y - 9 2026-07-02
NSZ83AH Norwegian Air Sweden AOC 8 2026-07-26
NSZ5NE - 8 2026-07-02
NSZ56J Norwegian Air Sweden AOC 8 2026-07-02
NSZ2900 Norwegian Air Sweden AOC 8 2026-07-22
NSZ2887 Norwegian Air Sweden AOC 8 2026-07-23
NSZ4AW Norwegian Air Sweden AOC 7 2026-07-26
NSZ2941 - 7 2026-07-16
NSZ2940 - 7 2026-07-16
NSZ2901 Norwegian Air Sweden AOC 7 2026-07-20
NSZ2621 - 7 2026-07-16
NSZ2620 - 7 2026-07-16
NSZ2615 - 7 2026-07-14
NSZ4508 - 6 2026-07-06
NSZ4507 - 6 2026-07-06
NSZ3YT - 6 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 NSZ2913 ALC → HEL Jul 26, 19:35 UTCJul 26, 21:45 UTC2h 10m
2026-07-26 NSZ9WP HEL → ALC Jul 26, 14:35 UTCJul 26, 18:30 UTC3h 55m
2026-07-26 NSZ83AH AGP → HEL Jul 26, 09:30 UTCJul 26, 13:45 UTC4h 15m
2026-07-26 NSZ4AW HEL → AGP Jul 26, 03:45 UTCJul 26, 08:05 UTC4h 21m
2026-07-25 NSZ6FV ATH → HEL Jul 25, 15:55 UTCJul 25, 19:25 UTC3h 30m
2026-07-25 NSZ2962 HEL → ATH Jul 25, 11:10 UTCJul 25, 14:15 UTC3h 5m
2026-07-25 NSZ2845 SPU → HEL Jul 25, 07:20 UTCJul 25, 10:05 UTC2h 45m
2026-07-25 NSZ2844 HEL → SPU Jul 25, 03:35 UTCJul 25, 05:55 UTC2h 20m
2026-07-24 NSZ2863 OTP → HEL Jul 24, 18:25 UTCJul 24, 21:05 UTC2h 40m
2026-07-24 NSZ2862 HEL → OTP Jul 24, 15:00 UTCJul 24, 17:20 UTC2h 20m
2026-07-24 NSZ83AH AGP → HEL Jul 24, 09:20 UTCJul 24, 13:25 UTC4h 5m
2026-07-24 NSZ4AW HEL → AGP Jul 24, 03:35 UTCJul 24, 07:55 UTC4h 20m
2026-07-23 NSZ2887 AGP → HEL Jul 23, 18:20 UTCJul 23, 22:45 UTC4h 25m
2026-07-23 NSZ6HT HEL → AGP Jul 23, 12:55 UTCJul 23, 17:00 UTC4h 5m
2026-07-23 NSZ2767 LGW → HEL Jul 23, 09:10 UTCJul 23, 11:55 UTC2h 45m
2026-07-23 NSZ2766 HEL → LGW Jul 23, 05:15 UTCJul 23, 07:50 UTC2h 35m
2026-07-22 NSZ2949 MLA → HEL Jul 22, 18:20 UTCJul 22, 22:00 UTC3h 40m
2026-07-22 NSZ2948 HEL → MLA Jul 22, 13:30 UTCJul 22, 17:10 UTC3h 40m
2026-07-22 NSZ2900 HEL → BCN Jul 22, 03:50 UTCJul 22, 12:10 UTC8h 20m
2026-07-21 NSZ2889 AGP → HEL Jul 21, 20:05 UTCJul 22, 00:30 UTC4h 25m
2026-07-21 NSZ6HT HEL → AGP Jul 21, 14:45 UTCJul 21, 19:00 UTC4h 15m
2026-07-21 NSZ83AH - Jul 21, 08:50 UTCJul 21, 13:10 UTC4h 20m
2026-07-21 NSZ4AW HEL → AGP Jul 21, 03:10 UTCJul 21, 07:25 UTC4h 15m
2026-07-20 NSZ2887 - Jul 20, 19:25 UTCJul 20, 23:45 UTC4h 20m
2026-07-20 NSZ6HT HEL → AGP Jul 20, 14:00 UTCJul 20, 18:20 UTC4h 20m
2026-07-20 NSZ2901 BCN → HEL Jul 20, 08:30 UTCJul 20, 12:05 UTC3h 35m
2026-07-20 NSZ2900 HEL → BCN Jul 20, 03:35 UTCJul 20, 07:10 UTC3h 35m
2026-07-19 NSZ2771 LGW → HEL Jul 19, 18:35 UTCJul 19, 21:00 UTC2h 25m
2026-07-19 NSZ2770 HEL → LGW Jul 19, 14:30 UTCJul 19, 17:15 UTC2h 45m
2026-07-19 NSZ2901 BCN → HEL Jul 19, 09:10 UTCJul 19, 12:25 UTC3h 15m
2026-07-19 NSZ2900 HEL → BCN Jul 19, 04:10 UTCJul 19, 07:45 UTC3h 35m
2026-07-18 NSZ2953 - Jul 18, 21:45 UTCJul 19, 01:25 UTC3h 40m
2026-07-18 NSZ2952 - Jul 18, 16:35 UTCJul 18, 20:20 UTC3h 45m
2026-07-18 NSZ2887 - Jul 18, 09:20 UTCJul 18, 13:30 UTC4h 10m
2026-07-18 NSZ6HT - Jul 18, 03:30 UTCJul 18, 08:00 UTC4h 30m
2026-07-17 NSZ26Q BOJ → HEL Jul 17, 21:44 UTCJul 17, 23:10 UTC1h 25m
2026-07-17 NSZ2856 HEL → BOJ Jul 17, 17:15 UTCJul 17, 20:04 UTC2h 50m
2026-07-17 NSZ2901 BCN → HEL Jul 17, 12:55 UTCJul 17, 16:10 UTC3h 15m
2026-07-17 NSZ2900 HEL → BCN Jul 17, 07:30 UTCJul 17, 11:15 UTC3h 45m
2026-07-17 NSZ23Y ARN → HEL Jul 17, 05:45 UTCJul 17, 06:25 UTC40m
2026-07-17 NSZ2602 HEL → ARN Jul 17, 04:14 UTCJul 17, 04:59 UTC45m
2026-07-16 NSZ2941 - Jul 16, 18:59 UTCJul 16, 21:30 UTC2h 30m
2026-07-16 NSZ2940 - Jul 16, 14:40 UTCJul 16, 17:14 UTC2h 35m
2026-07-16 NSZ2613 ARN → HEL Jul 16, 12:55 UTCJul 16, 13:34 UTC40m
2026-07-16 NSZ2621 PRG → ARN Jul 16, 10:15 UTCJul 16, 11:50 UTC1h 35m
2026-07-16 NSZ2620 ARN → PRG Jul 16, 07:35 UTCJul 16, 09:15 UTC1h 40m
2026-07-16 NSZ6RD HEL → ARN Jul 16, 05:35 UTCJul 16, 06:20 UTC45m
2026-07-15 NSZ2949 - Jul 15, 18:25 UTCJul 15, 22:20 UTC3h 55m
2026-07-15 NSZ2948 HEL → MLA Jul 15, 13:30 UTCJul 15, 17:10 UTC3h 40m
2026-07-15 NSZ2901 BCN → HEL Jul 15, 08:50 UTCJul 15, 12:20 UTC3h 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-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 NSZ2613, NSZ6HT, NSZ6RD, NSZ2WK, NSZ278Y.