Apparatus

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sensors Mode-S transponder

4AC98A

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RLJ · BOEING 737-800

Hex
4AC98A
Octal
22544612
Decimal
4,901,258
Country
SE
Tail
SE-RLJ
Type
B738
No current signal · last broadcast 6h ago
Flights observed
138
Distinct callsigns
8
Country
SE
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 4AC98A.

Country allocation

The ICAO 24-bit address 4AC98A 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 8 distinct

Callsign Airline Flights Last seen
BCS56H European Air Transport 35 2026-05-29
BCS6WK - 34 2026-05-29
BCS422 European Air Transport 28 2026-05-29
BCS7AG European Air Transport 27 2026-05-29
BCS3CA European Air Transport 7 2026-05-24
BCS473 European Air Transport 5 2026-05-22
BCS810 European Air Transport 1 2026-04-27
BCS700 European Air Transport 1 2026-05-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 BCS7AG VIT → MXP May 29, 21:40 UTCMay 29, 23:10 UTC1h 30m
2026-05-29 BCS56H VLC → VLC May 29, 18:45 UTCMay 29, 19:20 UTC35m
2026-05-29 BCS6WK - May 29, 05:15 UTCMay 29, 06:00 UTC45m
2026-05-29 BCS422 MXP → VIT May 29, 00:45 UTCMay 29, 02:10 UTC1h 25m
2026-05-28 BCS7AG VIT → MXP May 28, 21:20 UTCMay 28, 22:55 UTC1h 35m
2026-05-28 BCS56H VLC → VLC May 28, 18:35 UTCMay 28, 19:15 UTC40m
2026-05-28 BCS6WK - May 28, 05:20 UTCMay 28, 06:05 UTC45m
2026-05-28 BCS422 MXP → VIT May 28, 00:35 UTCMay 28, 02:05 UTC1h 30m
2026-05-27 BCS7AG VIT → MXP May 27, 21:20 UTCMay 27, 22:50 UTC1h 30m
2026-05-27 BCS56H VLC → VLC May 27, 18:35 UTCMay 27, 19:20 UTC45m
2026-05-27 BCS6WK - May 27, 05:14 UTCMay 27, 05:55 UTC40m
2026-05-27 BCS422 MXP → VIT May 27, 00:30 UTCMay 27, 01:54 UTC1h 25m
2026-05-26 BCS7AG VIT → MXP May 26, 21:20 UTCMay 26, 22:50 UTC1h 30m
2026-05-26 BCS56H VLC → VLC May 26, 18:50 UTCMay 26, 19:30 UTC40m
2026-05-26 BCS6WK - May 26, 05:05 UTCMay 26, 05:54 UTC50m
2026-05-26 BCS422 MXP → VIT May 26, 00:39 UTCMay 26, 02:04 UTC1h 25m
2026-05-25 BCS7AG VIT → MXP May 25, 21:40 UTCMay 25, 23:10 UTC1h 30m
2026-05-25 BCS56H VLC → VLC May 25, 18:45 UTCMay 25, 19:30 UTC44m
2026-05-25 BCS6WK - May 25, 03:40 UTCMay 25, 04:15 UTC35m
2026-05-24 BCS3CA EMA → VIT May 24, 23:10 UTCMay 24, 23:46 UTC36m
2026-05-22 BCS473 VIT → EMA May 22, 21:30 UTCMay 22, 23:00 UTC1h 30m
2026-05-22 BCS56H VLC → VLC May 22, 18:50 UTCMay 22, 19:30 UTC40m
2026-05-22 BCS6WK - May 22, 05:15 UTCMay 22, 06:00 UTC45m
2026-05-22 BCS422 MXP → VIT May 22, 00:30 UTCMay 22, 02:00 UTC1h 30m
2026-05-21 BCS7AG VIT → MXP May 21, 21:20 UTCMay 21, 22:45 UTC1h 25m
2026-05-21 BCS56H VLC → VLC May 21, 18:40 UTCMay 21, 19:25 UTC45m
2026-05-21 BCS6WK - May 21, 05:10 UTCMay 21, 05:55 UTC45m
2026-05-21 BCS422 MXP → VIT May 21, 00:35 UTCMay 21, 02:05 UTC1h 30m
2026-05-20 BCS7AG VIT → MXP May 20, 21:15 UTCMay 20, 22:45 UTC1h 30m
2026-05-20 BCS56H VLC → VLC May 20, 18:40 UTCMay 20, 19:20 UTC40m
2026-05-20 BCS6WK - May 20, 05:10 UTCMay 20, 05:55 UTC45m
2026-05-20 BCS422 MXP → VIT May 20, 00:30 UTCMay 20, 02:00 UTC1h 30m
2026-05-19 BCS7AG VIT → MXP May 19, 21:25 UTCMay 19, 22:45 UTC1h 20m
2026-05-19 BCS56H VLC → VLC May 19, 18:35 UTCMay 19, 19:20 UTC45m
2026-05-19 BCS6WK - May 19, 05:20 UTCMay 19, 06:00 UTC40m
2026-05-19 BCS422 MXP → VIT May 19, 00:55 UTCMay 19, 02:25 UTC1h 30m
2026-05-18 BCS7AG VIT → MXP May 18, 22:00 UTCMay 18, 23:30 UTC1h 30m
2026-05-18 BCS56H VLC → VLC May 18, 18:45 UTCMay 18, 19:35 UTC50m
2026-05-18 BCS6WK - May 18, 03:30 UTCMay 18, 04:11 UTC40m
2026-05-17 BCS3CA EMA → VIT May 17, 22:55 UTCMay 18, 00:25 UTC1h 30m
2026-05-15 BCS473 VIT → EMA May 15, 21:25 UTCMay 15, 23:05 UTC1h 40m
2026-05-15 BCS56H VLC → VLC May 15, 18:35 UTCMay 15, 19:15 UTC40m
2026-05-15 BCS6WK - May 15, 05:10 UTCMay 15, 05:55 UTC45m
2026-05-15 BCS422 MXP → VIT May 15, 00:40 UTCMay 15, 02:10 UTC1h 30m
2026-05-14 BCS7AG VIT → MXP May 14, 21:20 UTCMay 14, 22:35 UTC1h 15m
2026-05-14 BCS56H VLC → VLC May 14, 18:40 UTCMay 14, 19:25 UTC45m
2026-05-14 BCS6WK - May 14, 05:30 UTCMay 14, 06:05 UTC35m
2026-05-14 BCS422 MXP → VIT May 14, 00:30 UTCMay 14, 02:00 UTC1h 30m
2026-05-13 BCS7AG VIT → MXP May 13, 21:15 UTCMay 13, 22:35 UTC1h 20m
2026-05-13 BCS56H VLC → VLC May 13, 18:50 UTCMay 13, 19:30 UTC40m

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

Mode-S 4AC98A frequently asked

What is Mode-S code 4AC98A?
4AC98A is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RLJ.
Where is Mode-S 4AC98A registered?
Mode-S code 4AC98A is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4AC98A broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4AC98A, octal 22544612, decimal 4,901,258.
What flights does 4AC98A operate?
Mode-S 4AC98A has broadcast 8 distinct callsigns, including BCS56H, BCS6WK, BCS422, BCS7AG, BCS3CA.