sensors Mode-S transponder

4ACB42

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RZB · AIRBUS A-320neo

Hex
4ACB42
Octal
22545502
Decimal
4,901,698
Country
SE
Tail
SE-RZB
Type
A20N
No current signal · last broadcast 12h ago
Flights observed
15
Distinct callsigns
9
Country
SE
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 4ACB42.

Country allocation

The ICAO 24-bit address 4ACB42 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 9 distinct

Callsign Airline Flights Last seen
SAS22E - 3 2026-04-13
SAS11M - 3 2026-04-13
SAS88E Scandinavian Airlines System 2 2026-04-14
SAS27E - 2 2026-04-13
SAS69L Scandinavian Airlines System 1 2026-04-14
SAS48C - 1 2026-04-13
SAS277 - 1 2026-04-13
SAS260 Scandinavian Airlines System 1 2026-04-14
SAS053F Scandinavian Airlines System 1 2026-04-14

Recent flights last 15

DateFlightRouteTakeoffLandingDuration
2026-04-14 SAS053F OSL → TOS Apr 14, 09:55 UTCApr 14, 11:05 UTC1h 10m
2026-04-14 SAS260 BGO → OSL Apr 14, 08:10 UTCApr 14, 08:45 UTC35m
2026-04-14 SAS88E OSL → BGO Apr 14, 07:10 UTCApr 14, 07:25 UTC15m
2026-04-14 SAS88E OSL → BGO Apr 14, 06:50 UTCApr 14, 07:10 UTC20m
2026-04-14 SAS69L TOS → OSL Apr 14, 05:15 UTCApr 14, 05:55 UTC40m
2026-04-13 SAS27E - Apr 13, 19:50 UTCApr 13, 20:00 UTC10m
2026-04-13 SAS27E - Apr 13, 18:45 UTCApr 13, 20:00 UTC1h 15m
2026-04-13 SAS48C - Apr 13, 16:30 UTCApr 13, 17:10 UTC40m
2026-04-13 SAS277 - Apr 13, 15:05 UTCApr 13, 15:45 UTC40m
2026-04-13 SAS11M - Apr 13, 12:20 UTCApr 13, 13:50 UTC1h 30m
2026-04-13 SAS11M - Apr 13, 11:55 UTCApr 13, 13:50 UTC1h 55m
2026-04-13 SAS11M - Apr 13, 10:15 UTCApr 13, 12:15 UTC2h 0m
2026-04-13 SAS22E - Apr 13, 08:20 UTCApr 13, 09:00 UTC40m
2026-04-13 SAS22E - Apr 13, 07:55 UTCApr 13, 09:00 UTC1h 5m
2026-04-13 SAS22E - Apr 13, 05:25 UTCApr 13, 08:15 UTC2h 50m

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

Mode-S 4ACB42 frequently asked

What is Mode-S code 4ACB42?
4ACB42 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RZB.
Where is Mode-S 4ACB42 registered?
Mode-S code 4ACB42 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACB42 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACB42, octal 22545502, decimal 4,901,698.
What flights does 4ACB42 operate?
Mode-S 4ACB42 has broadcast 9 distinct callsigns, including SAS22E, SAS11M, SAS88E, SAS27E, SAS69L.