Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 NSZ2046 · -175 ft
Flights observed
524
Distinct callsigns
0
Country
SE
Last broadcast
2h ago

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.

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 NSZ2030 - Jul 14, 05:00 UTCJul 14, 05:45 UTC45m
2026-07-13 NSZ2063 - Jul 13, 19:35 UTCJul 13, 20:40 UTC1h 5m
2026-07-13 NSZ2067 PRG → CPH Jul 13, 17:35 UTCJul 13, 18:35 UTC1h 0m
2026-07-13 NSZ2066 CPH → PRG Jul 13, 15:35 UTCJul 13, 16:35 UTC1h 0m
2026-07-13 NSZ2062 - Jul 13, 13:35 UTCJul 13, 14:45 UTC1h 10m
2026-07-13 NSZ2003 OSL → RIX Jul 13, 11:20 UTCJul 13, 12:30 UTC1h 10m
2026-07-13 NSZ2011 TLL → OSL Jul 13, 09:10 UTCJul 13, 10:25 UTC1h 15m
2026-07-13 NSZ2010 OSL → TLL Jul 13, 07:15 UTCJul 13, 08:20 UTC1h 5m
2026-07-13 NSZ2002 - Jul 13, 05:05 UTCJul 13, 06:20 UTC1h 15m
2026-07-12 NSZ2063 - Jul 12, 19:40 UTCJul 12, 20:45 UTC1h 5m
2026-07-12 NSZ2067 PRG → CPH Jul 12, 17:50 UTCJul 12, 18:45 UTC55m
2026-07-12 NSZ2066 CPH → PRG Jul 12, 15:45 UTCJul 12, 16:50 UTC1h 5m
2026-07-12 NSZ2062 - Jul 12, 13:40 UTCJul 12, 14:45 UTC1h 5m
2026-07-12 NSZ2003 OSL → RIX Jul 12, 11:20 UTCJul 12, 12:35 UTC1h 15m
2026-07-12 NSZ2011 TLL → OSL Jul 12, 09:10 UTCJul 12, 10:20 UTC1h 10m
2026-07-12 NSZ2010 OSL → TLL Jul 12, 07:15 UTCJul 12, 08:25 UTC1h 10m
2026-07-12 NSZ2002 - Jul 12, 05:01 UTCJul 12, 06:15 UTC1h 15m
2026-07-11 NSZ2097 - Jul 11, 19:55 UTCJul 11, 23:35 UTC3h 40m
2026-07-11 NSZ9FQ - Jul 11, 15:05 UTCJul 11, 18:55 UTC3h 50m
2026-07-11 NSZ2031 ARN → RIX Jul 11, 13:10 UTCJul 11, 14:00 UTC50m
2026-07-11 NSZ56J - Jul 11, 09:15 UTCJul 11, 11:55 UTC2h 40m
2026-07-11 NSZ5NE - Jul 11, 05:20 UTCJul 11, 08:01 UTC2h 40m
2026-07-10 NSZ4574 PRG → ARN Jul 10, 20:10 UTCJul 10, 21:40 UTC1h 30m
2026-07-10 NSZ4573 ARN → PRG Jul 10, 17:50 UTCJul 10, 19:20 UTC1h 30m
2026-07-10 NSZ4052 - Jul 10, 16:05 UTCJul 10, 16:55 UTC50m
2026-07-10 NSZ4051 - Jul 10, 14:30 UTCJul 10, 15:20 UTC50m
2026-07-10 NSZ2NJ BCN → ARN Jul 10, 10:25 UTCJul 10, 13:30 UTC3h 5m
2026-07-10 NSZ4251 ARN → BCN Jul 10, 05:20 UTCJul 10, 08:30 UTC3h 10m
2026-07-09 NSZ46M - Jul 9, 18:55 UTCJul 9, 19:50 UTC55m
2026-07-09 NSZ7DP - Jul 9, 17:05 UTCJul 9, 18:05 UTC1h 0m
2026-07-09 NSZ44L - Jul 9, 15:25 UTCJul 9, 16:20 UTC55m
2026-07-09 NSZ43E - Jul 9, 13:30 UTCJul 9, 14:30 UTC1h 0m
2026-07-09 NSZ2NJ BCN → ARN Jul 9, 09:15 UTCJul 9, 12:25 UTC3h 10m
2026-07-09 NSZ4251 ARN → BCN Jul 9, 04:55 UTCJul 9, 08:00 UTC3h 5m
2026-07-08 NSZ4MF - Jul 8, 18:40 UTCJul 8, 22:00 UTC3h 20m
2026-07-08 NSZ3MB ARN → BCN Jul 8, 14:20 UTCJul 8, 17:10 UTC2h 50m
2026-07-08 NSZ48U BUD → ARN Jul 8, 11:15 UTCJul 8, 13:10 UTC1h 55m
2026-07-08 NSZ87C ARN → BUD Jul 8, 08:20 UTCJul 8, 10:05 UTC1h 45m
2026-07-08 NSZ2030 RIX → ARN Jul 8, 05:00 UTCJul 8, 05:50 UTC50m
2026-07-07 NSZ2023 BGO → RIX Jul 7, 18:10 UTCJul 7, 19:45 UTC1h 35m
2026-07-07 NSZ2025 PLQ → BGO Jul 7, 15:25 UTCJul 7, 17:00 UTC1h 35m
2026-07-07 NSZ2024 BGO → PLQ Jul 7, 13:15 UTCJul 7, 14:40 UTC1h 25m
2026-07-07 NSZ2022 - Jul 7, 10:45 UTCJul 7, 12:25 UTC1h 40m
2026-07-07 NSZ2091 - Jul 7, 07:35 UTCJul 7, 09:45 UTC2h 10m
2026-07-07 NSZ2090 - Jul 7, 04:20 UTCJul 7, 06:15 UTC1h 55m
2026-07-06 NSZ2005 OSL → RIX Jul 6, 18:25 UTCJul 6, 19:25 UTC1h 0m
2026-07-06 NSZ2004 - Jul 6, 16:10 UTCJul 6, 17:30 UTC1h 20m
2026-07-06 NSZ2031 - Jul 6, 13:45 UTCJul 6, 14:30 UTC45m
2026-07-06 NSZ2047 CDG → ARN Jul 6, 10:40 UTCJul 6, 12:50 UTC2h 10m
2026-07-06 NSZ2046 - Jul 6, 07:05 UTCJul 6, 09:15 UTC2h 10m

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.