Apparatus

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sensors Mode-S transponder

4AB561

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-MKA · ATR-72-600

Hex
4AB561
Octal
22532541
Decimal
4,896,097
Country
SE
Tail
SE-MKA
Type
AT76
No current signal · last broadcast Jul 26, 20:20 UTC
Flights observed
716
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 20:20 UTC

Last known position

Most recent position reported by Mode-S 4AB561.

Country allocation

The ICAO 24-bit address 4AB561 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
SAS670 Scandinavian Airlines System 13 2026-06-13
SAS669 Scandinavian Airlines System 13 2026-06-13
SAS094 Scandinavian Airlines System 12 2026-07-26
SAS085 Scandinavian Airlines System 12 2026-07-26
SAS652 Scandinavian Airlines System 11 2026-06-12
SAS651 Scandinavian Airlines System 11 2026-06-12
SAS45H Scandinavian Airlines System 11 2026-07-21
SAS093 Scandinavian Airlines System 11 2026-07-26
SAS086 Scandinavian Airlines System 11 2026-07-26
SAS077 Scandinavian Airlines System 11 2026-07-21
SAS755 Scandinavian Airlines System 10 2026-06-09
SAS096 - 10 2026-07-09
SAS85P - 9 2026-07-09
SAS758 Scandinavian Airlines System 9 2026-07-06
SAS757 - 9 2026-07-06
SAS756 Scandinavian Airlines System 9 2026-06-09
SAS2756 Scandinavian Airlines System 9 2026-06-11
SAS2755 Scandinavian Airlines System 9 2026-06-10
SAS1756 Scandinavian Airlines System 9 2026-06-09
SAS1755 Scandinavian Airlines System 9 2026-06-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SAS085 ARN → VBY Jul 26, 19:45 UTCJul 26, 20:20 UTC35m
2026-07-26 SAS084 VBY → ARN Jul 26, 18:20 UTCJul 26, 18:55 UTC35m
2026-07-26 SAS083 ARN → VBY Jul 26, 16:55 UTCJul 26, 17:25 UTC30m
2026-07-26 SAS082 VBY → ARN Jul 26, 15:25 UTCJul 26, 15:55 UTC30m
2026-07-26 SAS83R ARN → VBY Jul 26, 13:50 UTCJul 26, 14:20 UTC30m
2026-07-26 SAS094 VBY → ARN Jul 26, 11:40 UTCJul 26, 12:15 UTC35m
2026-07-26 SAS093 ARN → VBY Jul 26, 10:15 UTCJul 26, 10:45 UTC30m
2026-07-26 SAS086 VBY → ARN Jul 26, 06:05 UTCJul 26, 06:35 UTC31m
2026-07-25 SAS085 ARN → VBY Jul 25, 16:20 UTCJul 25, 16:50 UTC30m
2026-07-25 SAS084 VBY → ARN Jul 25, 14:55 UTCJul 25, 15:30 UTC35m
2026-07-25 SAS083 ARN → VBY Jul 25, 13:30 UTCJul 25, 14:00 UTC30m
2026-07-25 SAS094 VBY → ARN Jul 25, 11:10 UTCJul 25, 11:45 UTC35m
2026-07-25 SAS093 ARN → VBY Jul 25, 09:45 UTCJul 25, 10:15 UTC30m
2026-07-25 SAS086 VBY → ARN Jul 25, 06:05 UTCJul 25, 06:40 UTC35m
2026-07-24 SAS085 ARN → VBY Jul 24, 18:45 UTCJul 24, 19:15 UTC30m
2026-07-24 SAS725 HEL → ARN Jul 24, 16:50 UTCJul 24, 17:50 UTC1h 0m
2026-07-24 SAS722 ARN → HEL Jul 24, 15:05 UTCJul 24, 16:05 UTC1h 0m
2026-07-24 SAS108 MMX → ARN Jul 24, 12:40 UTCJul 24, 13:55 UTC1h 15m
2026-07-24 SAS66T ARN → MMX Jul 24, 10:40 UTCJul 24, 11:55 UTC1h 15m
2026-07-24 SAS2132 HAD → ARN Jul 24, 08:15 UTCJul 24, 09:20 UTC1h 5m
2026-07-24 SAS2131 ARN → HAD Jul 24, 06:30 UTCJul 24, 07:30 UTC1h 0m
2026-07-23 SAS2184 AGH → ARN Jul 23, 17:50 UTCJul 23, 18:55 UTC1h 5m
2026-07-23 SAS189 ARN → AGH Jul 23, 16:00 UTCJul 23, 17:05 UTC1h 5m
2026-07-23 SAS196 KLR → ARN Jul 23, 11:55 UTCJul 23, 12:40 UTC45m
2026-07-23 SAS195 ARN → KLR Jul 23, 10:20 UTCJul 23, 11:05 UTC45m
2026-07-23 SAS2182 AGH → ARN Jul 23, 08:00 UTCJul 23, 09:15 UTC1h 15m
2026-07-23 SAS181 ARN → AGH Jul 23, 06:10 UTCJul 23, 07:15 UTC1h 5m
2026-07-22 SAS126 MMX → ARN Jul 22, 15:45 UTCJul 22, 17:05 UTC1h 20m
2026-07-22 SAS121 ARN → MMX Jul 22, 13:50 UTCJul 22, 15:00 UTC1h 10m
2026-07-22 SAS094 VBY → ARN Jul 22, 11:25 UTCJul 22, 12:15 UTC50m
2026-07-22 SAS086 VBY → ARN Jul 22, 04:40 UTCJul 22, 05:20 UTC40m
2026-07-21 SAS085 ARN → VBY Jul 21, 18:50 UTCJul 21, 19:20 UTC30m
2026-07-21 SAS725 HEL → ARN Jul 21, 16:50 UTCJul 21, 17:50 UTC1h 0m
2026-07-21 SAS722 ARN → HEL Jul 21, 15:10 UTCJul 21, 16:10 UTC1h 0m
2026-07-21 SAS094 VBY → ARN Jul 21, 11:40 UTCJul 21, 12:10 UTC30m
2026-07-21 SAS093 ARN → VBY Jul 21, 10:20 UTCJul 21, 10:50 UTC30m
2026-07-21 SAS45H VBY → ARN Jul 21, 07:35 UTCJul 21, 08:10 UTC35m
2026-07-21 SAS077 ARN → VBY Jul 21, 06:10 UTCJul 21, 06:40 UTC30m
2026-07-21 SAS086 VBY → ARN Jul 21, 04:45 UTCJul 21, 05:15 UTC30m
2026-07-20 SAS085 ARN → VBY Jul 20, 18:50 UTCJul 20, 19:25 UTC35m
2026-07-20 SAS725 HEL → ARN Jul 20, 17:10 UTCJul 20, 18:05 UTC55m
2026-07-20 SAS722 ARN → HEL Jul 20, 15:15 UTCJul 20, 16:15 UTC1h 0m
2026-07-20 SAS094 VBY → ARN Jul 20, 11:35 UTCJul 20, 12:05 UTC30m
2026-07-20 SAS093 ARN → VBY Jul 20, 10:15 UTCJul 20, 10:45 UTC30m
2026-07-20 SAS2727 TKU → ARN Jul 20, 07:55 UTCJul 20, 08:35 UTC40m
2026-07-20 SAS2728 ARN → TKU Jul 20, 06:30 UTCJul 20, 07:00 UTC30m
2026-07-19 SAS035 - Jul 19, 19:45 UTCJul 19, 20:40 UTC55m
2026-07-19 SAS034 - Jul 19, 17:45 UTCJul 19, 18:35 UTC50m
2026-07-19 SAS2065 OSD → ARN Jul 19, 15:40 UTCJul 19, 16:45 UTC1h 5m
2026-07-19 SAS2064 ARN → OSD Jul 19, 14:05 UTCJul 19, 15:05 UTC1h 0m

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

Mode-S 4AB561 frequently asked

What is Mode-S code 4AB561?
4AB561 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-MKA.
Where is Mode-S 4AB561 registered?
Mode-S code 4AB561 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4AB561 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4AB561, octal 22532541, decimal 4,896,097.
What flights does 4AB561 operate?
Mode-S 4AB561 has broadcast 20 distinct callsigns, including SAS670, SAS669, SAS094, SAS085, SAS652.