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sensors Mode-S transponder

4AB5AB

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-MMK

Hex
4AB5AB
Octal
22532653
Decimal
4,896,171
Country
SE
Tail
SE-MMK
Type
BW6T
No current signal · last broadcast 7d ago
Flights observed
38
Distinct callsigns
1
Country
SE
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S 4AB5AB.

Country allocation

The ICAO 24-bit address 4AB5AB 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
SEMMK - 38 2026-07-22

Recent flights last 38

DateFlightRouteTakeoffLandingDuration
2026-07-22 SEMMK - Jul 22, 11:10 UTCJul 22, 13:05 UTC1h 55m
2026-07-22 SEMMK - Jul 22, 04:45 UTCJul 22, 05:25 UTC40m
2026-07-21 SEMMK - Jul 21, 16:40 UTCJul 21, 18:25 UTC1h 45m
2026-07-19 SEMMK - Jul 19, 07:55 UTCJul 19, 09:35 UTC1h 40m
2026-07-18 SEMMK - Jul 18, 14:20 UTCJul 18, 15:05 UTC45m
2026-07-18 SEMMK - Jul 18, 13:00 UTCJul 18, 13:45 UTC45m
2026-07-15 SEMMK - Jul 15, 14:50 UTCJul 15, 15:00 UTC10m
2026-07-14 SEMMK - Jul 14, 16:35 UTCJul 14, 17:45 UTC1h 10m
2026-07-14 SEMMK - Jul 14, 14:45 UTCJul 14, 16:05 UTC1h 20m
2026-07-14 SEMMK - Jul 14, 09:05 UTCJul 14, 10:25 UTC1h 20m
2026-07-13 SEMMK - Jul 13, 15:40 UTCJul 13, 16:30 UTC50m
2026-07-13 SEMMK - Jul 13, 09:20 UTCJul 13, 10:30 UTC1h 10m
2026-07-11 SEMMK - Jul 11, 16:25 UTCJul 11, 17:10 UTC45m
2026-07-11 SEMMK - Jul 11, 13:55 UTCJul 11, 14:55 UTC1h 0m
2026-07-11 SEMMK - Jul 11, 09:20 UTCJul 11, 10:35 UTC1h 15m
2026-07-11 SEMMK - Jul 11, 07:15 UTCJul 11, 07:30 UTC15m
2026-07-10 SEMMK - Jul 10, 16:55 UTCJul 10, 18:05 UTC1h 10m
2026-07-03 SEMMK - Jul 3, 15:05 UTCJul 3, 16:40 UTC1h 35m
2026-07-01 SEMMK - Jul 1, 18:10 UTCJul 1, 19:25 UTC1h 15m
2026-07-01 SEMMK - Jul 1, 16:15 UTCJul 1, 17:40 UTC1h 25m
2026-07-01 SEMMK - Jul 1, 10:00 UTCJul 1, 14:20 UTC4h 20m
2026-06-30 SEMMK - Jun 30, 18:05 UTCJun 30, 18:40 UTC35m
2026-06-30 SEMMK - Jun 30, 10:50 UTCJun 30, 11:35 UTC45m
2026-06-28 SEMMK - Jun 28, 12:39 UTCJun 28, 16:55 UTC4h 15m
2026-06-28 SEMMK - Jun 28, 09:10 UTCJun 28, 10:19 UTC1h 10m
2026-06-28 SEMMK - Jun 28, 04:25 UTCJun 28, 07:50 UTC3h 25m
2026-06-24 SEMMK - Jun 24, 17:20 UTCJun 24, 19:34 UTC2h 15m
2026-06-24 SEMMK - Jun 24, 06:55 UTCJun 24, 07:34 UTC40m
2026-06-24 SEMMK - Jun 24, 05:24 UTCJun 24, 05:49 UTC25m
2026-06-23 SEMMK - Jun 23, 14:15 UTCJun 23, 16:24 UTC2h 10m
2026-06-22 SEMMK - Jun 22, 09:54 UTCJun 22, 11:54 UTC2h 0m
2026-06-19 SEMMK - Jun 19, 08:09 UTCJun 19, 10:09 UTC2h 0m
2026-06-18 SEMMK - Jun 18, 11:20 UTCJun 18, 14:25 UTC3h 5m
2026-06-18 SEMMK - Jun 18, 08:15 UTCJun 18, 08:30 UTC15m
2026-06-17 SEMMK - Jun 17, 11:30 UTCJun 17, 12:25 UTC55m
2026-06-16 SEMMK - Jun 16, 11:15 UTCJun 16, 11:30 UTC15m
2026-06-04 SEMMK - Jun 4, 13:50 UTCJun 4, 14:25 UTC35m
2026-06-02 SEMMK - Jun 2, 09:40 UTCJun 2, 09:50 UTC10m

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

Mode-S 4AB5AB frequently asked

What is Mode-S code 4AB5AB?
4AB5AB is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-MMK.
Where is Mode-S 4AB5AB registered?
Mode-S code 4AB5AB is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4AB5AB broadcasting right now?
No active broadcast right now. Last signal was 7d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4AB5AB, octal 22532653, decimal 4,896,171.
What flights does 4AB5AB operate?
Mode-S 4AB5AB has broadcast 1 distinct callsign, including SEMMK.