Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4ACA78

ICAO 24-bit transponder address · allocated to Sweden

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

Hex
4ACA78
Octal
22545170
Decimal
4,901,496
Country
SE
Tail
SE-RSX
Type
E195
Broadcasting now · callsign SAS89T · 6,000 ft
Flights observed
679
Distinct callsigns
20
Country
SE
Last broadcast
16m ago

Current position

4ACA78 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4ACA78 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
SAS42F Scandinavian Airlines System 13 2026-06-16
SAS79F - 10 2026-06-16
SAS43T - 10 2026-06-16
SAS4159 - 10 2026-07-10
SAS58A - 9 2026-07-10
SAS48G - 9 2026-06-17
SAS4616 - 9 2026-06-17
SAS4615 - 9 2026-06-17
SAS4172 Scandinavian Airlines System 8 2026-06-10
SAS4163 Scandinavian Airlines System 8 2026-06-10
SAS2885 - 7 2026-07-10
SAS262 - 7 2026-06-19
SAS257 - 7 2026-06-19
SAS2303 Scandinavian Airlines System 7 2026-07-02
SAS4561 Scandinavian Airlines System 6 2026-06-11
SAS4552 Scandinavian Airlines System 6 2026-06-11
SAS4176 Scandinavian Airlines System 6 2026-05-26
SAS4161 Scandinavian Airlines System 6 2026-05-22
SAS355 - 6 2026-07-02
SAS338 - 6 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SAS89T - Jul 14, 09:00 UTCJul 14, 10:00 UTC1h 0m
2026-07-14 SAS601 CPH → ZRH Jul 14, 06:15 UTCJul 14, 07:40 UTC1h 25m
2026-07-14 SAS1871 - Jul 14, 04:15 UTCJul 14, 05:15 UTC1h 0m
2026-07-13 SAS1876 CPH → SVG Jul 13, 21:25 UTCJul 13, 22:15 UTC50m
2026-07-13 SAS542 MAN → CPH Jul 13, 18:55 UTCJul 13, 20:30 UTC1h 35m
2026-07-13 SAS541 CPH → MAN Jul 13, 16:15 UTCJul 13, 17:45 UTC1h 30m
2026-07-13 SAS62A BRU → CPH Jul 13, 13:55 UTCJul 13, 15:05 UTC1h 10m
2026-07-13 SAS1593 CPH → BRU Jul 13, 11:25 UTCJul 13, 12:45 UTC1h 20m
2026-07-13 SAS89T ZRH → CPH Jul 13, 08:35 UTCJul 13, 10:00 UTC1h 25m
2026-07-13 SAS601 CPH → ZRH Jul 13, 06:15 UTCJul 13, 07:35 UTC1h 20m
2026-07-12 SAS70K - Jul 12, 15:01 UTCJul 12, 16:35 UTC1h 35m
2026-07-12 SAS61U CPH → GVA Jul 12, 12:01 UTCJul 12, 13:40 UTC1h 40m
2026-07-12 SAS88A - Jul 12, 08:35 UTCJul 12, 10:20 UTC1h 45m
2026-07-12 SAS56D CPH → BLQ Jul 12, 05:35 UTCJul 12, 07:15 UTC1h 40m
2026-07-11 SAS2512 NCE → CPH Jul 11, 20:25 UTCJul 11, 22:25 UTC2h 0m
2026-07-11 SAS2511 - Jul 11, 17:10 UTCJul 11, 19:10 UTC2h 0m
2026-07-11 SAS2873 BGO → CPH Jul 11, 14:10 UTCJul 11, 15:10 UTC1h 0m
2026-07-11 SAS2868 CPH → BGO Jul 11, 12:20 UTCJul 11, 13:25 UTC1h 5m
2026-07-11 SAS70P - Jul 11, 09:30 UTCJul 11, 11:15 UTC1h 45m
2026-07-11 SAS32F - Jul 11, 06:25 UTCJul 11, 08:15 UTC1h 50m
2026-07-11 SAS1871 - Jul 11, 04:05 UTCJul 11, 05:01 UTC55m
2026-07-10 SAS58A BGO → SVG Jul 10, 20:25 UTCJul 10, 20:50 UTC25m
2026-07-10 SAS58A TRD → BGO Jul 10, 19:05 UTCJul 10, 19:50 UTC45m
2026-07-10 SAS4170 - Jul 10, 17:15 UTCJul 10, 18:05 UTC50m
2026-07-10 SAS4170 - Jul 10, 16:15 UTCJul 10, 16:35 UTC20m
2026-07-10 SAS4159 BGO → SVG Jul 10, 15:05 UTCJul 10, 15:30 UTC25m
2026-07-10 SAS4156 - Jul 10, 14:05 UTCJul 10, 14:25 UTC20m
2026-07-10 SAS1872 CPH → SVG Jul 10, 12:15 UTCJul 10, 13:05 UTC50m
2026-07-10 SAS45F - Jul 10, 09:45 UTCJul 10, 11:10 UTC1h 25m
2026-07-10 SAS21D - Jul 10, 06:40 UTCJul 10, 08:15 UTC1h 35m
2026-07-10 SAS2885 TRD → CPH Jul 10, 03:50 UTCJul 10, 05:05 UTC1h 15m
2026-07-09 SAS2884 CPH → TRD Jul 9, 21:25 UTCJul 9, 22:45 UTC1h 20m
2026-07-09 SAS542 MAN → CPH Jul 9, 19:00 UTCJul 9, 20:20 UTC1h 20m
2026-07-09 SAS541 CPH → MAN Jul 9, 16:15 UTCJul 9, 18:00 UTC1h 45m
2026-07-09 SAS62A - Jul 9, 13:55 UTCJul 9, 15:05 UTC1h 10m
2026-07-09 SAS1593 - Jul 9, 11:25 UTCJul 9, 12:40 UTC1h 15m
2026-07-09 SAS1674 - Jul 9, 08:15 UTCJul 9, 09:05 UTC50m
2026-07-09 SAS1673 CPH → BER Jul 9, 06:35 UTCJul 9, 07:10 UTC35m
2026-07-09 SAS2885 TRD → CPH Jul 9, 03:50 UTCJul 9, 05:05 UTC1h 15m
2026-07-08 SAS9239 CPH → TRD Jul 8, 22:00 UTCJul 8, 23:25 UTC1h 25m
2026-07-08 SAS1879 - Jul 8, 18:35 UTCJul 8, 19:30 UTC55m
2026-07-08 SAS1874 CPH → SVG Jul 8, 16:35 UTCJul 8, 17:35 UTC1h 0m
2026-07-08 SAS31F TRD → CPH Jul 8, 14:15 UTCJul 8, 15:20 UTC1h 5m
2026-07-08 SAS350 - Jul 8, 12:40 UTCJul 8, 13:25 UTC45m
2026-07-08 SAS64P - Jul 8, 08:45 UTCJul 8, 10:10 UTC1h 25m
2026-07-08 SAS89C - Jul 8, 06:10 UTCJul 8, 07:40 UTC1h 30m
2026-07-08 SAS15E KRS → OSL Jul 8, 04:10 UTCJul 8, 04:50 UTC40m
2026-07-07 SAS223 OSL → KRS Jul 7, 20:15 UTCJul 7, 20:50 UTC35m
2026-07-07 SAS98E - Jul 7, 17:20 UTCJul 7, 19:05 UTC1h 45m
2026-07-07 SAS4745 OSL → BRU Jul 7, 14:45 UTCJul 7, 16:15 UTC1h 30m

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

Mode-S 4ACA78 frequently asked

What is Mode-S code 4ACA78?
4ACA78 is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RSX.
Where is Mode-S 4ACA78 registered?
Mode-S code 4ACA78 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4ACA78 broadcasting right now?
Yes. Mode-S 4ACA78 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4ACA78, octal 22545170, decimal 4,901,496.
What flights does 4ACA78 operate?
Mode-S 4ACA78 has broadcast 20 distinct callsigns, including SAS42F, SAS79F, SAS43T, SAS4159, SAS58A.