Apparatus

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sensors Mode-S transponder

4ACB01

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RXA · BOEING 737-800

Hex
4ACB01
Octal
22545401
Decimal
4,901,633
Country
SE
Tail
SE-RXA
Type
B738
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
504
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S 4ACB01.

Country allocation

The ICAO 24-bit address 4ACB01 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
NSZ5357 Norwegian Air Sweden AOC 13 2026-05-25
NSZ4FU Norwegian Air Sweden AOC 12 2026-05-24
NSZ5352 Norwegian Air Sweden AOC 10 2026-05-25
NSZ5HA Norwegian Air Sweden AOC 9 2026-05-20
NSZ4506 Norwegian Air Sweden AOC 9 2026-07-26
NSZ4505 Norwegian Air Sweden AOC 9 2026-07-26
NSZ5NE - 8 2026-07-14
NSZ56J - 8 2026-07-14
NSZ5PF Norwegian Air Sweden AOC 7 2026-05-21
NSZ51M Norwegian Air Sweden AOC 7 2026-07-21
NSZ3LZ Norwegian Air Sweden AOC 7 2026-05-24
NSZ2ES Norwegian Air Sweden AOC 7 2026-07-21
NSZ9MC Norwegian Air Sweden AOC 6 2026-05-22
NSZ8WY Norwegian Air Sweden AOC 6 2026-05-21
NSZ5YR Norwegian Air Sweden AOC 6 2026-05-08
NSZ6LA Norwegian Air Sweden AOC 5 2026-07-22
NSZ60X Norwegian Air Sweden AOC 5 2026-07-26
NSZ5WU Norwegian Air Sweden AOC 5 2026-07-22
NSZ59T Norwegian Air Sweden AOC 5 2026-07-26
NSZ59FZ Norwegian Air Sweden AOC 5 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 NSZ60X LGW → ARN Jul 26, 19:40 UTCJul 26, 21:40 UTC2h 0m
2026-07-26 NSZ59T ARN → LGW Jul 26, 16:05 UTCJul 26, 18:30 UTC2h 25m
2026-07-26 NSZ4506 BER → ARN Jul 26, 13:40 UTCJul 26, 14:55 UTC1h 15m
2026-07-26 NSZ4505 ARN → BER Jul 26, 11:25 UTCJul 26, 12:45 UTC1h 20m
2026-07-26 NSZ4546 OTP → ARN Jul 26, 07:40 UTCJul 26, 10:10 UTC2h 30m
2026-07-26 NSZ4545 ARN → OTP Jul 26, 04:15 UTCJul 26, 06:45 UTC2h 31m
2026-07-25 NSZ4352 PRN → ARN Jul 25, 19:55 UTCJul 25, 22:15 UTC2h 20m
2026-07-25 NSZ4351 ARN → PRN Jul 25, 15:55 UTCJul 25, 18:20 UTC2h 25m
2026-07-25 NSZ2CP AGP → ARN Jul 25, 10:55 UTCJul 25, 14:35 UTC3h 40m
2026-07-25 NSZ21U ARN → AGP Jul 25, 05:35 UTCJul 25, 09:50 UTC4h 15m
2026-07-24 NSZ4360 - Jul 24, 19:45 UTCJul 24, 22:35 UTC2h 50m
2026-07-24 NSZ4357 ARN → FCO Jul 24, 15:50 UTCJul 24, 18:25 UTC2h 35m
2026-07-24 NSZ4506 BER → ARN Jul 24, 13:25 UTCJul 24, 14:50 UTC1h 25m
2026-07-24 NSZ4505 ARN → BER Jul 24, 10:55 UTCJul 24, 12:10 UTC1h 15m
2026-07-24 NSZ4378 MXP → ARN Jul 24, 07:35 UTCJul 24, 10:05 UTC2h 30m
2026-07-24 NSZ4377 ARN → MXP Jul 24, 04:10 UTCJul 24, 06:20 UTC2h 10m
2026-07-23 NSZ24J AGP → ARN Jul 23, 17:25 UTCJul 23, 21:25 UTC4h 0m
2026-07-23 NSZ3WE ARN → AGP Jul 23, 12:40 UTCJul 23, 16:15 UTC3h 35m
2026-07-23 NSZ48U BUD → ARN Jul 23, 08:45 UTCJul 23, 10:35 UTC1h 50m
2026-07-23 NSZ87C ARN → BUD Jul 23, 05:55 UTCJul 23, 07:50 UTC1h 55m
2026-07-22 NSZ60X LGW → ARN Jul 22, 19:15 UTCJul 22, 21:25 UTC2h 10m
2026-07-22 NSZ59T ARN → LGW Jul 22, 15:55 UTCJul 22, 18:05 UTC2h 10m
2026-07-22 NSZ6LA LGW → ARN Jul 22, 12:35 UTCJul 22, 14:45 UTC2h 10m
2026-07-22 NSZ5WU ARN → LGW Jul 22, 11:10 UTCJul 22, 11:15 UTC5m
2026-07-21 NSZ44PA ATH → ARN Jul 21, 19:10 UTCJul 21, 22:35 UTC3h 25m
2026-07-21 NSZ4383 ARN → ATH Jul 21, 15:00 UTCJul 21, 18:05 UTC3h 5m
2026-07-21 NSZ2ES LGW → ARN Jul 21, 11:40 UTCJul 21, 13:50 UTC2h 10m
2026-07-21 NSZ51M ARN → LGW Jul 21, 06:50 UTCJul 21, 09:00 UTC2h 10m
2026-07-20 NSZ4398 CHQ → ARN Jul 20, 22:45 UTCJul 21, 02:15 UTC3h 29m
2026-07-20 NSZ4397 ARN → CHQ Jul 20, 18:10 UTCJul 20, 21:30 UTC3h 20m
2026-07-20 NSZ4EM - Jul 20, 14:55 UTCJul 20, 16:50 UTC1h 55m
2026-07-20 NSZ3BM ARN → EDI Jul 20, 11:50 UTCJul 20, 13:40 UTC1h 50m
2026-07-20 NSZ4BD DBV → ARN Jul 20, 08:15 UTCJul 20, 10:45 UTC2h 30m
2026-07-20 NSZ4331 ARN → DBV Jul 20, 04:35 UTCJul 20, 07:05 UTC2h 30m
2026-07-19 NSZ8KY - Jul 19, 19:05 UTCJul 19, 21:40 UTC2h 35m
2026-07-19 NSZ4357 - Jul 19, 15:00 UTCJul 19, 17:45 UTC2h 45m
2026-07-19 NSZ2CP - Jul 19, 10:00 UTCJul 19, 13:50 UTC3h 50m
2026-07-19 NSZ21U - Jul 19, 04:45 UTCJul 19, 08:55 UTC4h 10m
2026-07-18 NSZ4402 - Jul 18, 18:30 UTCJul 18, 22:40 UTC4h 10m
2026-07-18 NSZ4401 ARN → LCA Jul 18, 13:20 UTCJul 18, 17:25 UTC4h 5m
2026-07-18 NSZ4328 BIA → ARN Jul 18, 09:40 UTCJul 18, 12:05 UTC2h 25m
2026-07-18 NSZ4327 ARN → BIA Jul 18, 05:50 UTCJul 18, 08:30 UTC2h 40m
2026-07-17 NSZ4574 PRG → ARN Jul 17, 20:10 UTCJul 17, 21:44 UTC1h 35m
2026-07-17 NSZ4573 ARN → PRG Jul 17, 17:30 UTCJul 17, 19:15 UTC1h 45m
2026-07-17 NSZ4052 SFT → ARN Jul 17, 15:40 UTCJul 17, 16:29 UTC50m
2026-07-17 NSZ4051 SFT → ARN Jul 17, 14:00 UTCJul 17, 14:50 UTC50m
2026-07-17 NSZ2NJ BCN → ARN Jul 17, 10:05 UTCJul 17, 13:00 UTC2h 55m
2026-07-17 NSZ4251 ARN → BCN Jul 17, 05:20 UTCJul 17, 08:40 UTC3h 20m
2026-07-16 NSZ4370 PSA → ARN Jul 16, 19:20 UTCJul 16, 21:50 UTC2h 30m
2026-07-16 NSZ4369 ARN → PSA Jul 16, 15:19 UTCJul 16, 18:00 UTC2h 40m

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

Mode-S 4ACB01 frequently asked

What is Mode-S code 4ACB01?
4ACB01 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RXA.
Where is Mode-S 4ACB01 registered?
Mode-S code 4ACB01 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACB01 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACB01, octal 22545401, decimal 4,901,633.
What flights does 4ACB01 operate?
Mode-S 4ACB01 has broadcast 20 distinct callsigns, including NSZ5357, NSZ4FU, NSZ5352, NSZ5HA, NSZ4506.