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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
Broadcasting now · callsign SAS2884 · 28,000 ft
Flights observed
673
Distinct callsigns
20
Country
SE
Last broadcast
1h ago

Current position

4ACA73 is currently broadcasting. Map zoomed to live position.

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 - 22 2026-07-12
SAS2744 - 20 2026-07-11
SAS31F - 19 2026-07-11
SAS1875 - 19 2026-07-14
SAS1870 - 19 2026-07-14
SAS24F - 18 2026-07-11
SAS2873 - 17 2026-07-13
SAS2868 - 17 2026-07-13
SAS2884 - 14 2026-07-06
SAS1871 - 14 2026-07-09
SAS1868 Scandinavian Airlines System 14 2026-06-14
SAS1207 - 14 2026-06-16
SAS2885 - 13 2026-07-07
SAS2747 - 13 2026-06-29
SAS2746 Scandinavian Airlines System 13 2026-06-29
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
2026-07-14 SAS554 - Jul 14, 18:50 UTCJul 14, 19:50 UTC1h 0m
2026-07-14 SAS49M CPH → AMS Jul 14, 16:35 UTCJul 14, 17:35 UTC1h 0m
2026-07-14 SAS70K - Jul 14, 13:40 UTCJul 14, 15:20 UTC1h 40m
2026-07-14 SAS61U CPH → GVA Jul 14, 10:55 UTCJul 14, 12:30 UTC1h 35m
2026-07-14 SAS1875 - Jul 14, 08:40 UTCJul 14, 09:35 UTC55m
2026-07-14 SAS1870 - Jul 14, 06:55 UTCJul 14, 07:45 UTC50m
2026-07-13 SAS792 - Jul 13, 21:15 UTCJul 13, 23:10 UTC1h 55m
2026-07-13 SAS791 CPH → NCE Jul 13, 17:55 UTCJul 13, 20:00 UTC2h 5m
2026-07-13 SAS2873 BGO → CPH Jul 13, 15:20 UTCJul 13, 16:25 UTC1h 5m
2026-07-13 SAS2868 CPH → BGO Jul 13, 13:30 UTCJul 13, 14:35 UTC1h 5m
2026-07-13 SAS45F - Jul 13, 11:10 UTCJul 13, 12:35 UTC1h 25m
2026-07-13 SAS21D - Jul 13, 08:01 UTCJul 13, 09:40 UTC1h 40m
2026-07-12 SAS64C - Jul 12, 20:15 UTCJul 12, 21:55 UTC1h 40m
2026-07-12 SAS71T CPH → BLQ Jul 12, 17:15 UTCJul 12, 19:01 UTC1h 45m
2026-07-12 SAS1596 BRU → CPH Jul 12, 14:55 UTCJul 12, 16:05 UTC1h 10m
2026-07-12 SAS1595 CPH → BRU Jul 12, 12:35 UTCJul 12, 13:55 UTC1h 20m
2026-07-12 SAS23A MXP → CPH Jul 12, 09:40 UTCJul 12, 11:20 UTC1h 40m
2026-07-12 SAS71K CPH → MXP Jul 12, 06:30 UTCJul 12, 08:15 UTC1h 45m
2026-07-12 SAS2749 PLQ → CPH Jul 12, 04:05 UTCJul 12, 05:01 UTC55m
2026-07-11 SAS2744 - Jul 11, 21:35 UTCJul 11, 22:10 UTC35m
2026-07-11 SAS67L BGO → CPH Jul 11, 18:05 UTCJul 11, 19:05 UTC1h 0m
2026-07-11 SAS2872 CPH → BGO Jul 11, 16:10 UTCJul 11, 17:15 UTC1h 5m
2026-07-11 SAS31F TRD → CPH Jul 11, 13:35 UTCJul 11, 15:10 UTC1h 35m
2026-07-11 SAS24F CPH → TRD Jul 11, 11:05 UTCJul 11, 12:30 UTC1h 25m
2026-07-11 SAS10E - Jul 11, 08:10 UTCJul 11, 10:00 UTC1h 50m
2026-07-11 SAS31T CPH → VCE Jul 11, 05:20 UTCJul 11, 06:55 UTC1h 35m
2026-07-10 SAS554 - Jul 10, 20:05 UTCJul 10, 21:05 UTC1h 0m
2026-07-10 SAS49M CPH → AMS Jul 10, 18:05 UTCJul 10, 19:10 UTC1h 5m
2026-07-10 SAS62A BRU → CPH Jul 10, 15:25 UTCJul 10, 16:35 UTC1h 10m
2026-07-10 SAS1593 CPH → BRU Jul 10, 11:25 UTCJul 10, 12:45 UTC1h 20m
2026-07-10 SAS69B KRK → CPH Jul 10, 08:20 UTCJul 10, 09:40 UTC1h 20m
2026-07-10 SAS98K CPH → KRK Jul 10, 06:15 UTCJul 10, 07:20 UTC1h 5m
2026-07-10 SAS2749 PLQ → CPH Jul 10, 03:55 UTCJul 10, 04:50 UTC55m
2026-07-09 SAS2744 CPH → PLQ Jul 9, 21:35 UTCJul 9, 22:30 UTC55m
2026-07-09 SAS2836 - Jul 9, 18:35 UTCJul 9, 20:30 UTC1h 55m
2026-07-09 SAS2835 - Jul 9, 15:55 UTCJul 9, 17:25 UTC1h 30m
2026-07-09 SAS31F TRD → CPH Jul 9, 13:35 UTCJul 9, 14:55 UTC1h 20m
2026-07-09 SAS24F CPH → TRD Jul 9, 11:15 UTCJul 9, 12:40 UTC1h 25m
2026-07-09 SAS89T ZRH → CPH Jul 9, 08:45 UTCJul 9, 10:15 UTC1h 30m
2026-07-09 SAS601 CPH → ZRH Jul 9, 06:15 UTCJul 9, 07:30 UTC1h 15m
2026-07-09 SAS1871 - Jul 9, 04:05 UTCJul 9, 04:55 UTC50m
2026-07-08 SAS58A BGO → SVG Jul 8, 20:35 UTCJul 8, 21:00 UTC25m
2026-07-08 SAS58A - Jul 8, 19:05 UTCJul 8, 19:50 UTC45m
2026-07-08 SAS4170 BGO → TRD Jul 8, 17:35 UTCJul 8, 18:25 UTC50m
2026-07-08 SAS4170 - Jul 8, 16:30 UTCJul 8, 16:50 UTC20m
2026-07-08 SAS4159 BGO → SVG Jul 8, 15:15 UTCJul 8, 15:40 UTC25m
2026-07-08 SAS4156 - Jul 8, 14:10 UTCJul 8, 14:30 UTC20m
2026-07-08 SAS1872 CPH → SVG Jul 8, 12:15 UTCJul 8, 13:20 UTC1h 5m
2026-07-08 SAS540 MAN → CPH Jul 8, 09:00 UTCJul 8, 10:45 UTC1h 45m
2026-07-08 SAS67C CPH → MAN Jul 8, 06:15 UTCJul 8, 07:55 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?
Yes. Mode-S 4ACA73 is currently airborne.
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, SAS31F, SAS1875, SAS1870.