Apparatus

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sensors Mode-S transponder

4ACA88

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RTH · BOEING 737 MAX 8

Hex
4ACA88
Octal
22545210
Decimal
4,901,512
Country
SE
Tail
SE-RTH
Type
B38M
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
538
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S 4ACA88.

Country allocation

The ICAO 24-bit address 4ACA88 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
NSZ2615 - 12 2026-07-17
NSZ6HT - 11 2026-07-04
NSZ2767 Norwegian Air Sweden AOC 11 2026-07-20
NSZ2766 - 11 2026-07-20
NSZ23Y - 11 2026-07-15
NSZ2901 - 10 2026-07-16
NSZ2900 - 10 2026-07-16
NSZ2845 - 10 2026-07-19
NSZ2844 - 9 2026-07-19
NSZ2602 - 9 2026-07-15
NSZ6RD - 8 2026-07-09
NSZ4BP Norwegian Air Sweden AOC 8 2026-07-20
NSZ4AW - 8 2026-07-02
NSZ2621 Norwegian Air Sweden AOC 8 2026-07-09
NSZ2620 - 8 2026-07-09
NSZ83AH Norwegian Air Sweden AOC 7 2026-07-02
NSZ5NE Norwegian Air Sweden AOC 7 2026-07-22
NSZ56J - 7 2026-07-22
NSZ2887 - 7 2026-07-04
NSZ2827 - 7 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 NSZ278Y LIS → ARN Jul 26, 17:25 UTCJul 26, 21:10 UTC3h 45m
2026-07-26 NSZ2WK ARN → LIS Jul 26, 12:00 UTCJul 26, 15:50 UTC3h 50m
2026-07-26 NSZ2MP NCE → ARN Jul 26, 08:15 UTCJul 26, 10:50 UTC2h 35m
2026-07-26 NSZ3YT ARN → NCE Jul 26, 04:20 UTCJul 26, 07:00 UTC2h 41m
2026-07-25 NSZ44PA ATH → ARN Jul 25, 18:25 UTCJul 25, 21:45 UTC3h 20m
2026-07-25 NSZ4383 ARN → ATH Jul 25, 14:05 UTCJul 25, 17:15 UTC3h 10m
2026-07-25 NSZ4004 UME → ARN Jul 25, 12:10 UTCJul 25, 12:55 UTC45m
2026-07-25 NSZ9UA ARN → UME Jul 25, 10:35 UTCJul 25, 11:15 UTC40m
2026-07-25 NSZ4366 VCE → ARN Jul 25, 07:30 UTCJul 25, 09:45 UTC2h 15m
2026-07-25 NSZ4365 ARN → VCE Jul 25, 04:10 UTCJul 25, 06:20 UTC2h 10m
2026-07-24 NSZ4562 BOJ → ARN Jul 24, 22:55 UTCJul 25, 01:45 UTC2h 50m
2026-07-24 NSZ4561 ARN → BOJ Jul 24, 19:10 UTCJul 24, 21:50 UTC2h 40m
2026-07-24 NSZ4EM EDI → ARN Jul 24, 16:35 UTCJul 24, 18:20 UTC1h 45m
2026-07-24 NSZ3BM ARN → EDI Jul 24, 13:30 UTCJul 24, 15:35 UTC2h 5m
2026-07-24 NSZ4CD LLA → ARN Jul 24, 11:20 UTCJul 24, 12:20 UTC1h 0m
2026-07-24 NSZ39C ARN → LLA Jul 24, 09:25 UTCJul 24, 10:20 UTC55m
2026-07-24 NSZ38K LLA → ARN Jul 24, 07:30 UTCJul 24, 08:30 UTC1h 0m
2026-07-24 NSZ35A ARN → LLA Jul 24, 05:40 UTCJul 24, 06:35 UTC55m
2026-07-23 NSZ4556 VNO → ARN Jul 23, 19:15 UTCJul 23, 20:20 UTC1h 5m
2026-07-23 NSZ4555 ARN → VNO Jul 23, 17:25 UTCJul 23, 18:25 UTC1h 0m
2026-07-23 NSZ4502 MUC → ARN Jul 23, 14:40 UTCJul 23, 16:35 UTC1h 55m
2026-07-23 NSZ4501 ARN → MUC Jul 23, 11:25 UTCJul 23, 13:00 UTC1h 35m
2026-07-23 NSZ4EM EDI → ARN Jul 23, 08:20 UTCJul 23, 10:20 UTC2h 0m
2026-07-23 NSZ3BM ARN → EDI Jul 23, 05:10 UTCJul 23, 07:00 UTC1h 50m
2026-07-22 NSZ4608 AYT → ARN Jul 22, 18:40 UTCJul 22, 22:10 UTC3h 30m
2026-07-22 NSZ4607 ARN → AYT Jul 22, 13:55 UTCJul 22, 17:25 UTC3h 30m
2026-07-22 NSZ56J - Jul 22, 10:20 UTCJul 22, 12:35 UTC2h 15m
2026-07-22 NSZ5NE ARN → FCO Jul 22, 05:20 UTCJul 22, 05:25 UTC5m
2026-07-21 NSZ4528 RAK → ARN Jul 21, 16:10 UTCJul 21, 20:45 UTC4h 35m
2026-07-21 NSZ4527 ARN → RAK Jul 21, 10:10 UTCJul 21, 14:25 UTC4h 15m
2026-07-21 NSZ38K LLA → ARN Jul 21, 07:40 UTCJul 21, 08:35 UTC55m
2026-07-21 NSZ35A - Jul 21, 05:40 UTCJul 21, 06:35 UTC55m
2026-07-20 NSZ4MF BCN → ARN Jul 20, 20:50 UTCJul 20, 23:50 UTC3h 0m
2026-07-20 NSZ3MB ARN → BCN Jul 20, 14:55 UTCJul 20, 18:15 UTC3h 20m
2026-07-20 NSZ4BP HEL → ARN Jul 20, 13:05 UTCJul 20, 13:50 UTC45m
2026-07-20 NSZ2767 LGW → HEL Jul 20, 09:35 UTCJul 20, 12:05 UTC2h 30m
2026-07-20 NSZ2766 HEL → LGW Jul 20, 05:15 UTCJul 20, 08:00 UTC2h 45m
2026-07-19 NSZ1GT ARN → HEL Jul 19, 20:35 UTCJul 19, 21:15 UTC40m
2026-07-19 NSZ2FU HEL → ARN Jul 19, 18:40 UTCJul 19, 19:30 UTC50m
2026-07-19 NSZ2617 ARN → HEL Jul 19, 17:10 UTCJul 19, 17:50 UTC40m
2026-07-19 NSZ2616 HEL → ARN Jul 19, 15:25 UTCJul 19, 16:15 UTC50m
2026-07-19 NSZ7RP RVN → HEL Jul 19, 13:40 UTCJul 19, 14:25 UTC45m
2026-07-19 NSZ6YA HEL → RVN Jul 19, 11:35 UTCJul 19, 12:20 UTC45m
2026-07-19 NSZ2845 - Jul 19, 07:50 UTCJul 19, 10:05 UTC2h 15m
2026-07-19 NSZ2844 - Jul 19, 03:50 UTCJul 19, 06:20 UTC2h 30m
2026-07-18 NSZ6FV ATH → HEL Jul 18, 15:50 UTCJul 18, 19:05 UTC3h 15m
2026-07-18 NSZ2962 HEL → ATH Jul 18, 11:10 UTCJul 18, 14:35 UTC3h 25m
2026-07-18 NSZ2845 - Jul 18, 07:35 UTCJul 18, 09:50 UTC2h 15m
2026-07-18 NSZ2844 - Jul 18, 03:40 UTCJul 18, 06:20 UTC2h 40m
2026-07-17 NSZ2529 RVN → HEL Jul 17, 18:05 UTCJul 17, 19:00 UTC55m

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

Mode-S 4ACA88 frequently asked

What is Mode-S code 4ACA88?
4ACA88 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RTH.
Where is Mode-S 4ACA88 registered?
Mode-S code 4ACA88 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACA88 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACA88, octal 22545210, decimal 4,901,512.
What flights does 4ACA88 operate?
Mode-S 4ACA88 has broadcast 20 distinct callsigns, including NSZ2615, NSZ6HT, NSZ2767, NSZ2766, NSZ23Y.