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sensors Mode-S transponder

8990C9

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-58508 · AIRBUS A-350-900

Hex
8990C9
Octal
42310311
Decimal
9,015,497
Country
TW
Tail
B-58508
Type
A359
No current signal · last broadcast Jul 26, 20:55 UTC
Flights observed
281
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 20:55 UTC

Last known position

Most recent position reported by Mode-S 8990C9.

Country allocation

The ICAO 24-bit address 8990C9 falls within the block assigned to Taiwan (TW) by ICAO Annex 10, Volume III. Every aircraft registered in Taiwan 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
SJX001 - 21 2026-07-26
SJX851 STARLUX Airlines 20 2026-07-25
SJX002 - 18 2026-07-25
SJX032 - 17 2026-07-22
SJX012 - 16 2026-07-18
SJX011 - 16 2026-07-19
SJX850 STARLUX Airlines 15 2026-07-25
SJX742 - 15 2026-07-15
SJX031 STARLUX Airlines 14 2026-07-23
SJX741 - 13 2026-07-15
SJX871 STARLUX Airlines 9 2026-07-20
SJX870 STARLUX Airlines 9 2026-07-20
SJX823 - 9 2026-06-15
SJX026 STARLUX Airlines 9 2026-06-11
SJX025 - 9 2026-06-12
SJX009 - 9 2026-07-05
SJX772 STARLUX Airlines 7 2026-05-24
SJX771 STARLUX Airlines 7 2026-05-24
SJX010 - 7 2026-07-04
SJX822 - 6 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SJX001 - Jul 26, 08:05 UTCJul 26, 20:55 UTC12h 50m
2026-07-25 SJX002 - Jul 25, 17:30 UTCJul 26, 04:40 UTC11h 10m
2026-07-25 SJX002 - Jul 25, 16:40 UTCJul 25, 16:55 UTC15m
2026-07-25 SJX851 CTS → TPE Jul 25, 10:50 UTCJul 25, 11:05 UTC15m
2026-07-25 SJX851 CTS → TPE Jul 25, 07:45 UTCJul 25, 09:45 UTC2h 0m
2026-07-25 SJX850 TPE → CTS Jul 25, 02:25 UTCJul 25, 05:55 UTC3h 30m
2026-07-24 SJX841 FUK → TPE Jul 24, 05:50 UTCJul 24, 07:45 UTC1h 55m
2026-07-24 SJX840 TPE → FUK Jul 24, 03:20 UTCJul 24, 03:50 UTC30m
2026-07-24 SJX840 TPE → FUK Jul 24, 02:05 UTCJul 24, 02:15 UTC10m
2026-07-23 SJX031 SEA → TPE Jul 23, 19:45 UTCJul 23, 20:05 UTC20m
2026-07-23 SJX031 SEA → TPE Jul 23, 08:40 UTCJul 23, 18:30 UTC9h 50m
2026-07-22 SJX032 TPE → SEA Jul 22, 14:15 UTCJul 22, 23:25 UTC9h 10m
2026-07-22 SJX032 - Jul 22, 12:40 UTCJul 22, 12:55 UTC15m
2026-07-22 SJX840 TPE → FUK Jul 22, 03:15 UTCJul 22, 03:50 UTC35m
2026-07-22 SJX840 TPE → FUK Jul 22, 01:45 UTCJul 22, 02:05 UTC20m
2026-07-21 SJX001 - Jul 21, 20:30 UTCJul 21, 20:50 UTC20m
2026-07-21 SJX001 - Jul 21, 08:05 UTCJul 21, 19:55 UTC11h 50m
2026-07-20 SJX002 TPE → LAX Jul 20, 16:30 UTCJul 21, 04:55 UTC12h 24m
2026-07-20 SJX871 OKA → TPE Jul 20, 07:30 UTCJul 20, 08:35 UTC1h 5m
2026-07-20 SJX870 TPE → OKA Jul 20, 05:40 UTCJul 20, 05:50 UTC10m
2026-07-20 SJX870 TPE → OKA Jul 20, 04:35 UTCJul 20, 05:05 UTC30m
2026-07-19 SJX011 - Jul 19, 19:45 UTCJul 19, 20:10 UTC25m
2026-07-19 SJX011 - Jul 19, 08:10 UTCJul 19, 18:35 UTC10h 25m
2026-07-18 SJX012 - Jul 18, 18:10 UTCJul 19, 04:20 UTC10h 10m
2026-07-18 SJX012 - Jul 18, 16:40 UTCJul 18, 16:50 UTC10m
2026-07-18 SJX851 - Jul 18, 10:55 UTCJul 18, 11:10 UTC15m
2026-07-18 SJX851 - Jul 18, 07:50 UTCJul 18, 09:50 UTC2h 0m
2026-07-18 SJX850 - Jul 18, 02:35 UTCJul 18, 06:00 UTC3h 26m
2026-07-17 SJX871 - Jul 17, 08:30 UTCJul 17, 08:45 UTC15m
2026-07-17 SJX870 - Jul 17, 05:45 UTCJul 17, 05:55 UTC10m
2026-07-17 SJX870 - Jul 17, 04:39 UTCJul 17, 04:59 UTC20m
2026-07-16 SJX031 - Jul 16, 19:20 UTCJul 16, 19:35 UTC15m
2026-07-16 SJX031 - Jul 16, 08:25 UTCJul 16, 18:10 UTC9h 45m
2026-07-15 SJX032 - Jul 15, 14:10 UTCJul 15, 23:40 UTC9h 30m
2026-07-15 SJX032 - Jul 15, 12:35 UTCJul 15, 12:50 UTC15m
2026-07-15 SJX742 - Jul 15, 09:15 UTCJul 15, 10:30 UTC1h 15m
2026-07-15 SJX742 - Jul 15, 07:00 UTCJul 15, 07:10 UTC10m
2026-07-15 SJX741 - Jul 15, 04:35 UTCJul 15, 04:50 UTC15m
2026-07-15 SJX741 - Jul 15, 01:50 UTCJul 15, 02:40 UTC50m
2026-07-14 SJX851 - Jul 14, 08:05 UTCJul 14, 11:25 UTC3h 20m
2026-07-14 SJX850 - Jul 14, 02:40 UTCJul 14, 06:15 UTC3h 35m
2026-07-13 SJX031 - Jul 13, 19:50 UTCJul 13, 20:10 UTC20m
2026-07-13 SJX031 - Jul 13, 08:50 UTCJul 13, 18:45 UTC9h 55m
2026-07-12 SJX032 - Jul 12, 12:45 UTCJul 13, 00:01 UTC11h 15m
2026-07-11 SJX3031 - Jul 11, 17:30 UTCJul 11, 18:00 UTC30m
2026-07-11 SJX3031 - Jul 11, 06:30 UTCJul 11, 16:25 UTC9h 55m
2026-07-09 SJX032 - Jul 9, 14:10 UTCJul 9, 23:10 UTC9h 0m
2026-07-09 SJX032 - Jul 9, 12:40 UTCJul 9, 12:55 UTC15m
2026-07-09 SJX742 - Jul 9, 07:20 UTCJul 9, 10:35 UTC3h 15m
2026-07-09 SJX741 - Jul 9, 02:15 UTCJul 9, 05:15 UTC3h 0m

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 B-58508 page for operator, model, and routing details .

Mode-S 8990C9 frequently asked

What is Mode-S code 8990C9?
8990C9 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-58508.
Where is Mode-S 8990C9 registered?
Mode-S code 8990C9 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8990C9 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8990C9, octal 42310311, decimal 9,015,497.
What flights does 8990C9 operate?
Mode-S 8990C9 has broadcast 20 distinct callsigns, including SJX001, SJX851, SJX002, SJX032, SJX012.