Apparatus

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sensors Mode-S transponder

4ACB04

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RXD · BOEING 737-800

Hex
4ACB04
Octal
22545404
Decimal
4,901,636
Country
SE
Tail
SE-RXD
Type
B738
Broadcasting now · callsign NSZ2975 · 30,000 ft
Flights observed
601
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 22:05 UTC

Current position

4ACB04 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4ACB04 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
NSZ2031 - 14 2026-07-17
NSZ2030 Norwegian Air Sweden AOC 14 2026-07-23
NSZ3YT - 11 2026-06-26
NSZ5WU Norwegian Air Sweden AOC 10 2026-07-26
NSZ38K - 10 2026-06-19
NSZ35A - 10 2026-06-19
NSZ2MP Norwegian Air Sweden AOC 10 2026-06-26
NSZ46M - 9 2026-07-09
NSZ44L - 9 2026-07-09
NSZ43E - 9 2026-07-09
NSZ6LA Norwegian Air Sweden AOC 8 2026-07-26
NSZ60X - 8 2026-06-22
NSZ45F Norwegian Air Sweden AOC 8 2026-06-04
NSZ2067 Norwegian Air Sweden AOC 8 2026-07-22
NSZ2066 Norwegian Air Sweden AOC 8 2026-07-22
NSZ2063 Norwegian Air Sweden AOC 8 2026-07-22
NSZ2062 Norwegian Air Sweden AOC 8 2026-07-22
NSZ2047 - 8 2026-07-17
NSZ2046 - 8 2026-07-17
NSZ2003 Norwegian Air Sweden AOC 8 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 NSZ4EM EDI → ARN Jul 26, 20:15 UTCJul 26, 21:55 UTC1h 40m
2026-07-26 NSZ3BM ARN → EDI Jul 26, 17:10 UTCJul 26, 19:05 UTC1h 55m
2026-07-26 NSZ6LA LGW → ARN Jul 26, 14:05 UTCJul 26, 16:00 UTC1h 55m
2026-07-26 NSZ5WU ARN → LGW Jul 26, 10:00 UTCJul 26, 12:15 UTC2h 15m
2026-07-26 NSZ5WU ARN → LGW Jul 26, 08:05 UTCJul 26, 08:45 UTC40m
2026-07-26 NSZ5B ARN → UME Jul 26, 06:30 UTCJul 26, 07:05 UTC36m
2026-07-25 NSZ6MJ FAO → ARN Jul 25, 17:50 UTCJul 25, 21:55 UTC4h 5m
2026-07-25 NSZ75Z ARN → FAO Jul 25, 12:35 UTCJul 25, 16:35 UTC4h 0m
2026-07-25 NSZ6YF SPU → ARN Jul 25, 09:10 UTCJul 25, 11:30 UTC2h 20m
2026-07-25 NSZ5PK ARN → SPU Jul 25, 05:35 UTCJul 25, 07:40 UTC2h 5m
2026-07-24 NSZ4164 CPH → ARN Jul 24, 19:35 UTCJul 24, 20:30 UTC55m
2026-07-24 NSZ4163 ARN → CPH Jul 24, 17:50 UTCJul 24, 18:40 UTC50m
2026-07-24 NSZ4064 KRN → ARN Jul 24, 15:40 UTCJul 24, 16:55 UTC1h 15m
2026-07-24 NSZ4063 ARN → KRN Jul 24, 13:35 UTCJul 24, 14:50 UTC1h 15m
2026-07-24 NSZ2ES LGW → ARN Jul 24, 10:20 UTCJul 24, 12:20 UTC2h 0m
2026-07-24 NSZ51M ARN → LGW Jul 24, 07:05 UTCJul 24, 09:15 UTC2h 10m
2026-07-23 NSZ278Y LIS → ARN Jul 23, 18:45 UTCJul 23, 22:25 UTC3h 40m
2026-07-23 NSZ2WK ARN → LIS Jul 23, 13:30 UTCJul 23, 17:20 UTC3h 50m
2026-07-23 NSZ2030 RIX → ARN Jul 23, 11:05 UTCJul 23, 11:50 UTC45m
2026-07-23 NSZ2125 BOJ → RIX Jul 23, 07:40 UTCJul 23, 10:00 UTC2h 20m
2026-07-23 NSZ2124 RIX → BOJ Jul 23, 04:15 UTCJul 23, 06:25 UTC2h 10m
2026-07-22 NSZ2063 CPH → RIX Jul 22, 19:40 UTCJul 22, 20:40 UTC1h 0m
2026-07-22 NSZ2067 PRG → CPH Jul 22, 17:50 UTCJul 22, 18:45 UTC55m
2026-07-22 NSZ2066 CPH → PRG Jul 22, 16:00 UTCJul 22, 16:55 UTC55m
2026-07-22 NSZ2062 RIX → CPH Jul 22, 14:05 UTCJul 22, 15:15 UTC1h 10m
2026-07-22 NSZ2003 OSL → RIX Jul 22, 11:55 UTCJul 22, 13:10 UTC1h 15m
2026-07-22 NSZ2002 RIX → OSL Jul 22, 05:10 UTCJul 22, 11:25 UTC6h 15m
2026-07-21 NSZ2023 BGO → RIX Jul 21, 18:15 UTCJul 21, 19:45 UTC1h 30m
2026-07-21 NSZ2025 PLQ → BGO Jul 21, 15:40 UTCJul 21, 17:10 UTC1h 30m
2026-07-21 NSZ2024 BGO → PLQ Jul 21, 13:20 UTCJul 21, 14:45 UTC1h 25m
2026-07-21 NSZ2022 RIX → BGO Jul 21, 10:50 UTCJul 21, 12:30 UTC1h 40m
2026-07-21 NSZ2090 RIX → TIV Jul 21, 04:15 UTCJul 21, 06:20 UTC2h 5m
2026-07-20 NSZ2063 CPH → RIX Jul 20, 19:45 UTCJul 20, 20:50 UTC1h 5m
2026-07-20 NSZ2067 PRG → CPH Jul 20, 17:55 UTCJul 20, 18:50 UTC55m
2026-07-20 NSZ2066 CPH → PRG Jul 20, 15:50 UTCJul 20, 16:50 UTC1h 0m
2026-07-20 NSZ2062 RIX → CPH Jul 20, 13:40 UTCJul 20, 14:50 UTC1h 10m
2026-07-20 NSZ2003 OSL → RIX Jul 20, 11:30 UTCJul 20, 12:45 UTC1h 15m
2026-07-20 NSZ2011 TLL → OSL Jul 20, 09:05 UTCJul 20, 10:15 UTC1h 10m
2026-07-20 NSZ2010 OSL → TLL Jul 20, 07:10 UTCJul 20, 08:20 UTC1h 10m
2026-07-20 NSZ2002 RIX → OSL Jul 20, 05:15 UTCJul 20, 06:25 UTC1h 10m
2026-07-19 NSZ2063 CPH → RIX Jul 19, 19:40 UTCJul 19, 20:45 UTC1h 5m
2026-07-19 NSZ2067 PRG → CPH Jul 19, 18:00 UTCJul 19, 19:00 UTC1h 0m
2026-07-19 NSZ2066 CPH → PRG Jul 19, 15:50 UTCJul 19, 17:00 UTC1h 10m
2026-07-19 NSZ2062 RIX → CPH Jul 19, 13:35 UTCJul 19, 14:50 UTC1h 15m
2026-07-19 NSZ2003 OSL → RIX Jul 19, 11:30 UTCJul 19, 12:40 UTC1h 10m
2026-07-19 NSZ2011 TLL → OSL Jul 19, 09:25 UTCJul 19, 10:30 UTC1h 5m
2026-07-19 NSZ2010 OSL → TLL Jul 19, 07:15 UTCJul 19, 08:25 UTC1h 10m
2026-07-19 NSZ2002 RIX → OSL Jul 19, 05:05 UTCJul 19, 06:15 UTC1h 10m
2026-07-18 NSZ2023 - Jul 18, 18:10 UTCJul 18, 19:45 UTC1h 35m
2026-07-18 NSZ2022 - Jul 18, 11:00 UTCJul 18, 12:40 UTC1h 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-RXD page for operator, model, and routing details .

Mode-S 4ACB04 frequently asked

What is Mode-S code 4ACB04?
4ACB04 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RXD.
Where is Mode-S 4ACB04 registered?
Mode-S code 4ACB04 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACB04 broadcasting right now?
Yes. Mode-S 4ACB04 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACB04, octal 22545404, decimal 4,901,636.
What flights does 4ACB04 operate?
Mode-S 4ACB04 has broadcast 20 distinct callsigns, including NSZ2031, NSZ2030, NSZ3YT, NSZ5WU, NSZ38K.