Apparatus

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sensors Mode-S transponder

4AB5AA

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-MMJ · EVEKTOR SportStar

Hex
4AB5AA
Octal
22532652
Decimal
4,896,170
Country
SE
Tail
SE-MMJ
Type
EVSS
No current signal · last broadcast 18h ago
Flights observed
8
Distinct callsigns
1
Country
SE
Last broadcast
18h ago

Last known position

Most recent position reported by Mode-S 4AB5AA.

Country allocation

The ICAO 24-bit address 4AB5AA 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 1 distinct

Callsign Airline Flights Last seen
SEMMJ - 8 2026-04-14

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-14 SEMMJ - Apr 14, 10:20 UTCApr 14, 11:05 UTC45m
2026-04-14 SEMMJ - Apr 14, 07:00 UTCApr 14, 07:10 UTC10m
2026-04-13 SEMMJ - Apr 13, 16:15 UTCApr 13, 16:30 UTC15m
2026-04-13 SEMMJ - Apr 13, 15:50 UTCApr 13, 16:30 UTC40m
2026-04-13 SEMMJ - Apr 13, 14:15 UTCApr 13, 16:15 UTC2h 0m
2026-04-13 SEMMJ - Apr 13, 12:20 UTCApr 13, 13:35 UTC1h 15m
2026-04-13 SEMMJ - Apr 13, 11:55 UTCApr 13, 13:35 UTC1h 40m
2026-04-13 SEMMJ - Apr 13, 11:40 UTCApr 13, 12:15 UTC35m

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

Mode-S 4AB5AA frequently asked

What is Mode-S code 4AB5AA?
4AB5AA is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-MMJ.
Where is Mode-S 4AB5AA registered?
Mode-S code 4AB5AA is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4AB5AA broadcasting right now?
No active broadcast right now. Last signal was 18h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4AB5AA, octal 22532652, decimal 4,896,170.
What flights does 4AB5AA operate?
Mode-S 4AB5AA has broadcast 1 distinct callsign, including SEMMJ.