Apparatus

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sensors Mode-S transponder

4ACA73

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RSS · EMBRAER ERJ-190-200

Hex
4ACA73
Octal
22545163
Decimal
4,901,491
Country
SE
Tail
SE-RSS
Type
E195
No current signal · last broadcast Jul 26, 20:25 UTC
Flights observed
764
Distinct callsigns
20
Country
SE
Last broadcast
Jul 26, 20:25 UTC

Last known position

Most recent position reported by Mode-S 4ACA73.

Country allocation

The ICAO 24-bit address 4ACA73 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
SAS2749 Scandinavian Airlines System 23 2026-07-25
SAS2744 Scandinavian Airlines System 21 2026-07-24
SAS1875 Scandinavian Airlines System 21 2026-07-25
SAS1870 Scandinavian Airlines System 21 2026-07-25
SAS31F Scandinavian Airlines System 20 2026-07-25
SAS24F Scandinavian Airlines System 19 2026-07-25
SAS2884 Scandinavian Airlines System 18 2026-07-25
SAS2873 - 18 2026-07-15
SAS2868 - 18 2026-07-15
SAS2885 Scandinavian Airlines System 17 2026-07-26
SAS2747 Scandinavian Airlines System 15 2026-07-21
SAS2746 - 15 2026-07-21
SAS1871 Scandinavian Airlines System 15 2026-07-23
SAS1868 Scandinavian Airlines System 14 2026-06-14
SAS1207 - 14 2026-06-16
SAS1869 - 13 2026-06-14
SAS1635 Scandinavian Airlines System 13 2026-06-11
SAS1212 - 13 2026-06-16
SAS1211 - 13 2026-06-16
SAS1208 - 13 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SAS542 MAN → CPH Jul 26, 18:55 UTCJul 26, 20:20 UTC1h 25m
2026-07-26 SAS541 CPH → MAN Jul 26, 16:00 UTCJul 26, 17:40 UTC1h 40m
2026-07-26 SAS38D SVG → CPH Jul 26, 14:00 UTCJul 26, 14:55 UTC55m
2026-07-26 SAS1872 CPH → SVG Jul 26, 12:25 UTCJul 26, 13:15 UTC50m
2026-07-26 SAS22P GVA → CPH Jul 26, 09:15 UTCJul 26, 11:00 UTC1h 45m
2026-07-26 SAS613 CPH → GVA Jul 26, 06:20 UTCJul 26, 07:55 UTC1h 36m
2026-07-26 SAS2885 TRD → CPH Jul 26, 03:50 UTCJul 26, 05:10 UTC1h 20m
2026-07-25 SAS2884 CPH → TRD Jul 25, 21:40 UTCJul 25, 22:55 UTC1h 15m
2026-07-25 SAS67L BGO → CPH Jul 25, 17:50 UTCJul 25, 18:50 UTC1h 0m
2026-07-25 SAS2872 CPH → BGO Jul 25, 16:00 UTCJul 25, 17:05 UTC1h 5m
2026-07-25 SAS31F TRD → CPH Jul 25, 13:05 UTCJul 25, 14:25 UTC1h 20m
2026-07-25 SAS24F TRD → CPH Jul 25, 11:00 UTCJul 25, 12:15 UTC1h 15m
2026-07-25 SAS1875 SVG → CPH Jul 25, 08:25 UTCJul 25, 09:15 UTC50m
2026-07-25 SAS1870 CPH → SVG Jul 25, 06:40 UTCJul 25, 07:40 UTC1h 0m
2026-07-25 SAS2749 PLQ → CPH Jul 25, 04:00 UTCJul 25, 05:00 UTC1h 0m
2026-07-24 SAS2744 CPH → PLQ Jul 24, 21:10 UTCJul 24, 22:05 UTC55m
2026-07-24 SAS1879 SVG → CPH Jul 24, 17:55 UTCJul 24, 18:40 UTC45m
2026-07-24 SAS1874 CPH → SVG Jul 24, 16:15 UTCJul 24, 17:10 UTC55m
2026-07-24 SAS38D SVG → CPH Jul 24, 13:50 UTCJul 24, 14:45 UTC55m
2026-07-24 SAS4481 TRD → SVG Jul 24, 12:05 UTCJul 24, 13:00 UTC55m
2026-07-24 SAS4486 SVG → TRD Jul 24, 10:30 UTCJul 24, 11:25 UTC55m
2026-07-24 SAS4612 ABZ → SVG Jul 24, 09:00 UTCJul 24, 09:45 UTC45m
2026-07-24 SAS4611 SVG → ABZ Jul 24, 07:05 UTCJul 24, 07:55 UTC50m
2026-07-23 SAS58A TRD → BGO Jul 23, 20:30 UTCJul 23, 20:50 UTC20m
2026-07-23 SAS58A TRD → BGO Jul 23, 19:05 UTCJul 23, 19:55 UTC50m
2026-07-23 SAS4170 SVG → BGO Jul 23, 17:45 UTCJul 23, 18:30 UTC45m
2026-07-23 SAS4170 SVG → BGO Jul 23, 16:40 UTCJul 23, 17:10 UTC30m
2026-07-23 SAS4159 BGO → SVG Jul 23, 15:30 UTCJul 23, 15:55 UTC25m
2026-07-23 SAS4156 SVG → BGO Jul 23, 14:25 UTCJul 23, 14:50 UTC25m
2026-07-23 SAS1872 CPH → SVG Jul 23, 12:40 UTCJul 23, 13:40 UTC1h 0m
2026-07-23 SAS45F CDG → CPH Jul 23, 09:35 UTCJul 23, 11:15 UTC1h 40m
2026-07-23 SAS21D CPH → CDG Jul 23, 06:35 UTCJul 23, 08:05 UTC1h 30m
2026-07-23 SAS1871 SVG → CPH Jul 23, 04:05 UTCJul 23, 04:55 UTC50m
2026-07-22 SAS1876 CPH → SVG Jul 22, 21:30 UTCJul 22, 22:25 UTC55m
2026-07-22 SAS1879 SVG → CPH Jul 22, 17:55 UTCJul 22, 18:50 UTC55m
2026-07-22 SAS1874 CPH → SVG Jul 22, 16:20 UTCJul 22, 17:15 UTC55m
2026-07-22 SAS38D SVG → CPH Jul 22, 14:20 UTCJul 22, 15:20 UTC1h 0m
2026-07-22 SAS1872 CPH → SVG Jul 22, 12:30 UTCJul 22, 13:25 UTC55m
2026-07-22 SAS45F CDG → CPH Jul 22, 11:10 UTCJul 22, 11:30 UTC20m
2026-07-22 SAS2885 TRD → CPH Jul 22, 03:45 UTCJul 22, 05:05 UTC1h 20m
2026-07-21 SAS2884 CPH → TRD Jul 21, 21:15 UTCJul 21, 22:35 UTC1h 20m
2026-07-21 SAS2836 PUY → CPH Jul 21, 18:05 UTCJul 21, 19:50 UTC1h 45m
2026-07-21 SAS2835 CPH → PUY Jul 21, 15:25 UTCJul 21, 17:05 UTC1h 40m
2026-07-21 SAS2747 PLQ → CPH Jul 21, 13:15 UTCJul 21, 14:10 UTC55m
2026-07-21 SAS2746 CPH → PLQ Jul 21, 11:25 UTCJul 21, 12:20 UTC55m
2026-07-21 SAS540 MAN → CPH Jul 21, 08:50 UTCJul 21, 10:30 UTC1h 40m
2026-07-21 SAS67C CPH → MAN Jul 21, 06:05 UTCJul 21, 07:35 UTC1h 30m
2026-07-20 SAS792 CPH → NCE Jul 20, 19:40 UTCJul 20, 21:40 UTC2h 0m
2026-07-20 SAS791 CPH → NCE Jul 20, 16:30 UTCJul 20, 18:30 UTC2h 0m
2026-07-20 SAS70K GVA → CPH Jul 20, 13:35 UTCJul 20, 15:15 UTC1h 40m

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

Mode-S 4ACA73 frequently asked

What is Mode-S code 4ACA73?
4ACA73 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RSS.
Where is Mode-S 4ACA73 registered?
Mode-S code 4ACA73 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACA73 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACA73, octal 22545163, decimal 4,901,491.
What flights does 4ACA73 operate?
Mode-S 4ACA73 has broadcast 20 distinct callsigns, including SAS2749, SAS2744, SAS1875, SAS1870, SAS31F.