sensors Mode-S transponder

4AB56E

ICAO 24-bit transponder address · allocated to Sweden

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

Hex
4AB56E
Octal
22532556
Decimal
4,896,110
Country
SE
Tail
SE-MKN
Type
AT76
Broadcasting now · callsign SAS33E · 11,400 ft
Flights observed
17
Distinct callsigns
12
Country
SE
Last broadcast
20h ago

Current position

4AB56E is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4AB56E 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 12 distinct

Callsign Airline Flights Last seen
SAS2131 - 3 2026-04-13
SAS2136 - 2 2026-04-13
SAS1136 - 2 2026-04-13
SAS1127 Scandinavian Airlines System 2 2026-04-13
SAS725 Scandinavian Airlines System 1 2026-04-12
SAS65A Scandinavian Airlines System 1 2026-04-14
SAS47T Scandinavian Airlines System 1 2026-04-14
SAS33E - 1 2026-04-13
SAS2135 - 1 2026-04-12
SAS2132 - 1 2026-04-13
SAS1128 - 1 2026-04-13
SAS080 - 1 2026-04-14

Recent flights last 17

DateFlightRouteTakeoffLandingDuration
2026-04-14 SAS080 - Apr 14, 10:45 UTCApr 14, 11:05 UTC20m
2026-04-14 SAS47T ARN → VBY Apr 14, 09:25 UTCApr 14, 10:00 UTC35m
2026-04-14 SAS65A VBY → ARN Apr 14, 05:15 UTCApr 14, 05:50 UTC35m
2026-04-13 SAS1128 - Apr 13, 17:35 UTCApr 13, 18:35 UTC1h 0m
2026-04-13 SAS1127 ARN → RNB Apr 13, 16:15 UTCApr 13, 16:55 UTC40m
2026-04-13 SAS1127 ARN → RNB Apr 13, 16:00 UTCApr 13, 16:15 UTC15m
2026-04-13 SAS2132 - Apr 13, 13:15 UTCApr 13, 14:20 UTC1h 5m
2026-04-13 SAS2131 - Apr 13, 12:20 UTCApr 13, 12:35 UTC15m
2026-04-13 SAS2131 - Apr 13, 11:55 UTCApr 13, 12:35 UTC40m
2026-04-13 SAS2131 - Apr 13, 11:35 UTCApr 13, 12:15 UTC40m
2026-04-13 SAS1136 - Apr 13, 08:20 UTCApr 13, 09:05 UTC45m
2026-04-13 SAS1136 - Apr 13, 08:05 UTCApr 13, 08:15 UTC10m
2026-04-13 SAS33E - Apr 13, 06:25 UTCApr 13, 07:20 UTC55m
2026-04-13 SAS2136 - Apr 13, 04:20 UTCApr 13, 05:05 UTC45m
2026-04-13 SAS2136 - Apr 13, 04:00 UTCApr 13, 04:15 UTC15m
2026-04-12 SAS2135 - Apr 12, 18:45 UTCApr 12, 19:50 UTC1h 5m
2026-04-12 SAS725 HEL → ARN Apr 12, 17:15 UTCApr 12, 17:40 UTC25m

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

Mode-S 4AB56E frequently asked

What is Mode-S code 4AB56E?
4AB56E is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-MKN.
Where is Mode-S 4AB56E registered?
Mode-S code 4AB56E is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4AB56E broadcasting right now?
Yes. Mode-S 4AB56E is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4AB56E, octal 22532556, decimal 4,896,110.
What flights does 4AB56E operate?
Mode-S 4AB56E has broadcast 12 distinct callsigns, including SAS2131, SAS2136, SAS1136, SAS1127, SAS725.