Apparatus

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sensors Mode-S transponder

4ACA4F

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RRO · BOEING 737-800

Hex
4ACA4F
Octal
22545117
Decimal
4,901,455
Country
SE
Tail
SE-RRO
Type
B738
Transponder active on ground
Flights observed
596
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 20:30 UTC

Last known position

Most recent position reported by Mode-S 4ACA4F.

Country allocation

The ICAO 24-bit address 4ACA4F 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
NSZ6LA - 14 2026-07-21
NSZ5WU Norwegian Air Sweden AOC 14 2026-07-21
NSZ60X Norwegian Air Sweden AOC 13 2026-07-21
NSZ59T Norwegian Air Sweden AOC 13 2026-07-21
NSZ45F Norwegian Air Sweden AOC 10 2026-07-22
NSZ4354 - 10 2026-07-12
NSZ2031 Norwegian Air Sweden AOC 10 2026-07-25
NSZ4353 - 9 2026-07-12
NSZ3YT Norwegian Air Sweden AOC 9 2026-07-22
NSZ2030 Norwegian Air Sweden AOC 9 2026-07-25
NSZ96Y Norwegian Air Sweden AOC 8 2026-05-26
NSZ38K - 8 2026-07-16
NSZ35A - 8 2026-07-16
NSZ2MP Norwegian Air Sweden AOC 8 2026-07-08
NSZ5YB Norwegian Air Sweden AOC 7 2026-05-26
NSZ46M Norwegian Air Sweden AOC 7 2026-07-22
NSZ4506 - 7 2026-07-16
NSZ4505 - 7 2026-07-16
NSZ44L - 7 2026-07-01
NSZ43E - 7 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 NSZ2063 CPH → RIX Jul 26, 19:30 UTCJul 26, 20:30 UTC1h 0m
2026-07-26 NSZ2067 PRG → CPH Jul 26, 17:30 UTCJul 26, 18:30 UTC1h 0m
2026-07-26 NSZ2066 CPH → PRG Jul 26, 15:40 UTCJul 26, 16:40 UTC1h 0m
2026-07-26 NSZ2062 RIX → CPH Jul 26, 13:40 UTCJul 26, 14:50 UTC1h 10m
2026-07-26 NSZ2003 OSL → RIX Jul 26, 11:35 UTCJul 26, 12:45 UTC1h 10m
2026-07-26 NSZ2011 TLL → OSL Jul 26, 09:25 UTCJul 26, 10:40 UTC1h 15m
2026-07-26 NSZ2010 OSL → TLL Jul 26, 07:15 UTCJul 26, 08:20 UTC1h 5m
2026-07-26 NSZ2002 RIX → OSL Jul 26, 05:10 UTCJul 26, 06:25 UTC1h 15m
2026-07-25 NSZ2097 ALC → RIX Jul 25, 20:40 UTCJul 26, 00:00 UTC3h 20m
2026-07-25 NSZ9FQ RIX → ALC Jul 25, 15:10 UTCJul 25, 19:10 UTC4h 0m
2026-07-25 NSZ2031 ARN → RIX Jul 25, 13:05 UTCJul 25, 13:50 UTC45m
2026-07-25 NSZ2057 SJJ → ARN Jul 25, 09:40 UTCJul 25, 12:05 UTC2h 25m
2026-07-25 NSZ2056 ARN → SJJ Jul 25, 06:05 UTCJul 25, 08:10 UTC2h 5m
2026-07-25 NSZ2030 RIX → ARN Jul 25, 04:10 UTCJul 25, 05:00 UTC50m
2026-07-24 NSZ2005 OSL → RIX Jul 24, 18:45 UTCJul 24, 19:55 UTC1h 10m
2026-07-24 NSZ2004 RIX → OSL Jul 24, 16:25 UTCJul 24, 17:45 UTC1h 20m
2026-07-24 NSZ2031 ARN → RIX Jul 24, 13:55 UTCJul 24, 14:40 UTC45m
2026-07-24 NSZ2047 CDG → ARN Jul 24, 10:55 UTCJul 24, 13:00 UTC2h 5m
2026-07-24 NSZ2030 RIX → ARN Jul 24, 05:35 UTCJul 24, 09:35 UTC4h 0m
2026-07-23 NSZ2031 ARN → RIX Jul 23, 19:30 UTCJul 23, 20:20 UTC50m
2026-07-23 NSZ2047 CDG → ARN Jul 23, 16:20 UTCJul 23, 18:40 UTC2h 20m
2026-07-23 NSZ2046 ARN → CDG Jul 23, 13:10 UTCJul 23, 15:15 UTC2h 5m
2026-07-23 NSZ4546 OTP → ARN Jul 23, 09:35 UTCJul 23, 12:00 UTC2h 25m
2026-07-23 NSZ4545 ARN → OTP Jul 23, 06:10 UTCJul 23, 08:35 UTC2h 25m
2026-07-23 NSZ4398 CHQ → ARN Jul 23, 00:10 UTCJul 23, 03:45 UTC3h 35m
2026-07-22 NSZ4397 ARN → CHQ Jul 22, 19:35 UTCJul 22, 23:00 UTC3h 25m
2026-07-22 NSZ46M LLA → ARN Jul 22, 17:00 UTCJul 22, 18:00 UTC1h 0m
2026-07-22 NSZ45F ARN → LLA Jul 22, 15:05 UTCJul 22, 16:00 UTC55m
2026-07-22 NSZ4092 VBY → ARN Jul 22, 13:45 UTCJul 22, 14:15 UTC30m
2026-07-22 NSZ4091 ARN → VBY Jul 22, 12:35 UTCJul 22, 13:00 UTC25m
2026-07-22 NSZ3YT ARN → NCE Jul 22, 05:10 UTCJul 22, 11:35 UTC6h 25m
2026-07-21 NSZ60X LGW → ARN Jul 21, 19:40 UTCJul 21, 21:45 UTC2h 5m
2026-07-21 NSZ59T ARN → LGW Jul 21, 16:20 UTCJul 21, 18:25 UTC2h 5m
2026-07-21 NSZ6LA LGW → ARN Jul 21, 13:10 UTCJul 21, 15:20 UTC2h 10m
2026-07-21 NSZ5WU ARN → LGW Jul 21, 09:10 UTCJul 21, 11:15 UTC2h 5m
2026-07-21 NSZ4004 - Jul 21, 07:05 UTCJul 21, 07:55 UTC50m
2026-07-21 NSZ9UA ARN → UME Jul 21, 05:30 UTCJul 21, 06:05 UTC35m
2026-07-20 NSZ4122 - Jul 20, 19:30 UTCJul 20, 20:10 UTC40m
2026-07-20 NSZ4121 ARN → OSL Jul 20, 17:55 UTCJul 20, 18:35 UTC40m
2026-07-20 NSZ4PU LYS → ARN Jul 20, 14:50 UTCJul 20, 17:05 UTC2h 15m
2026-07-20 NSZ4329 ARN → LYS Jul 20, 11:15 UTCJul 20, 13:35 UTC2h 20m
2026-07-20 NSZ4340 PUY → ARN Jul 20, 07:55 UTCJul 20, 10:00 UTC2h 5m
2026-07-20 NSZ39TP ARN → PUY Jul 20, 04:45 UTCJul 20, 06:55 UTC2h 10m
2026-07-19 NSZ4EM EDI → ARN Jul 19, 19:35 UTCJul 19, 21:40 UTC2h 5m
2026-07-19 NSZ3BM ARN → EDI Jul 19, 16:40 UTCJul 19, 18:35 UTC1h 55m
2026-07-19 NSZ6LA LGW → ARN Jul 19, 13:35 UTCJul 19, 15:35 UTC2h 0m
2026-07-19 NSZ5WU ARN → LGW Jul 19, 09:55 UTCJul 19, 12:10 UTC2h 15m
2026-07-19 NSZ8GH UME → ARN Jul 19, 08:05 UTCJul 19, 08:50 UTC45m
2026-07-19 NSZ5B ARN → UME Jul 19, 06:25 UTCJul 19, 07:00 UTC35m
2026-07-18 NSZ44PA - Jul 18, 18:35 UTCJul 18, 21:50 UTC3h 15m

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

Mode-S 4ACA4F frequently asked

What is Mode-S code 4ACA4F?
4ACA4F is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RRO.
Where is Mode-S 4ACA4F registered?
Mode-S code 4ACA4F is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACA4F broadcasting right now?
Mode-S 4ACA4F is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACA4F, octal 22545117, decimal 4,901,455.
What flights does 4ACA4F operate?
Mode-S 4ACA4F has broadcast 20 distinct callsigns, including NSZ6LA, NSZ5WU, NSZ60X, NSZ59T, NSZ45F.