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 7h ago
Flights observed
136
Distinct callsigns
20
Country
TW
Last broadcast
7h ago

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 - 14 2026-05-29
SJX012 STARLUX Airlines 11 2026-05-24
SJX011 STARLUX Airlines 10 2026-05-25
SJX002 - 9 2026-05-28
SJX851 STARLUX Airlines 8 2026-05-19
SJX772 STARLUX Airlines 7 2026-05-24
SJX771 STARLUX Airlines 7 2026-05-24
SJX742 STARLUX Airlines 7 2026-05-28
SJX850 STARLUX Airlines 6 2026-05-19
SJX741 STARLUX Airlines 6 2026-05-28
SJX025 STARLUX Airlines 5 2026-05-27
SJX236 STARLUX Airlines 4 2026-04-23
SJX235 STARLUX Airlines 4 2026-04-23
SJX032 STARLUX Airlines 4 2026-05-22
SJX026 STARLUX Airlines 4 2026-05-26
SJX823 STARLUX Airlines 3 2026-05-05
SJX821 STARLUX Airlines 3 2026-04-23
SJX202 STARLUX Airlines 3 2026-05-18
SJX009 - 3 2026-05-03
SJX822 STARLUX Airlines 2 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SJX001 - May 29, 07:55 UTCMay 29, 21:30 UTC13h 35m
2026-05-28 SJX002 - May 28, 16:45 UTCMay 29, 04:15 UTC11h 30m
2026-05-28 SJX742 BKK → TPE May 28, 06:30 UTCMay 28, 09:45 UTC3h 15m
2026-05-28 SJX741 TPE → BKK May 28, 01:30 UTCMay 28, 04:30 UTC3h 0m
2026-05-27 SJX025 PHX → TPE May 27, 06:49 UTCMay 27, 21:00 UTC14h 10m
2026-05-26 SJX026 TPE → PHX May 26, 12:35 UTCMay 27, 00:44 UTC12h 10m
2026-05-25 SJX011 SFO → TPE May 25, 20:34 UTCMay 25, 21:04 UTC30m
2026-05-25 SJX011 SFO → TPE May 25, 08:30 UTCMay 25, 19:25 UTC10h 54m
2026-05-24 SJX012 TPE → SFO May 24, 18:30 UTCMay 25, 03:35 UTC9h 5m
2026-05-24 SJX012 TPE → SFO May 24, 16:30 UTCMay 24, 16:50 UTC20m
2026-05-24 SJX772 SIN → TPE May 24, 06:25 UTCMay 24, 10:40 UTC4h 15m
2026-05-24 SJX771 TPE → SIN May 24, 00:15 UTCMay 24, 04:10 UTC3h 55m
2026-05-23 SJX031 SEA → TPE May 23, 08:30 UTCMay 23, 20:15 UTC11h 45m
2026-05-22 SJX032 TPE → SEA May 22, 14:05 UTCMay 22, 22:40 UTC8h 35m
2026-05-22 SJX032 TPE → SEA May 22, 12:30 UTCMay 22, 12:50 UTC20m
2026-05-22 SJX742 BKK → TPE May 22, 09:20 UTCMay 22, 09:55 UTC35m
2026-05-22 SJX742 BKK → TPE May 22, 06:35 UTCMay 22, 07:05 UTC30m
2026-05-22 SJX741 TPE → BKK May 22, 01:50 UTCMay 22, 04:50 UTC3h 0m
2026-05-21 SJX712 SGN → TPE May 21, 07:20 UTCMay 21, 07:45 UTC25m
2026-05-21 SJX711 TPE → SGN May 21, 00:05 UTCMay 21, 00:55 UTC50m
2026-05-20 SJX001 - May 20, 21:05 UTCMay 20, 21:30 UTC25m
2026-05-20 SJX001 - May 20, 08:00 UTCMay 20, 20:30 UTC12h 30m
2026-05-19 SJX002 - May 19, 18:40 UTCMay 20, 04:10 UTC9h 30m
2026-05-19 SJX002 - May 19, 16:30 UTCMay 19, 16:50 UTC20m
2026-05-19 SJX851 CTS → TPE May 19, 10:50 UTCMay 19, 11:15 UTC25m
2026-05-19 SJX851 CTS → TPE May 19, 07:50 UTCMay 19, 09:35 UTC1h 45m
2026-05-19 SJX850 TPE → CTS May 19, 02:25 UTCMay 19, 06:00 UTC3h 35m
2026-05-18 SJX746 BKK → TPE May 18, 11:05 UTCMay 18, 14:15 UTC3h 10m
2026-05-18 SJX745 TPE → BKK May 18, 06:10 UTCMay 18, 09:20 UTC3h 10m
2026-05-18 SJX202 MFM → TPE May 18, 03:30 UTCMay 18, 04:40 UTC1h 10m
2026-05-18 SJX201 TPE → MFM May 18, 00:10 UTCMay 18, 01:30 UTC1h 20m
2026-05-17 SJX001 - May 17, 08:00 UTCMay 17, 21:05 UTC13h 5m
2026-05-16 SJX002 - May 16, 16:31 UTCMay 17, 03:50 UTC11h 20m
2026-05-16 SJX772 SIN → TPE May 16, 10:16 UTCMay 16, 11:25 UTC1h 10m
2026-05-16 SJX772 SIN → TPE May 16, 07:16 UTCMay 16, 07:41 UTC25m
2026-05-16 SJX771 TPE → SIN May 16, 00:55 UTCMay 16, 04:50 UTC3h 55m
2026-05-15 SJX011 SFO → TPE May 15, 08:10 UTCMay 15, 20:40 UTC12h 29m
2026-05-14 SJX012 TPE → SFO May 14, 16:40 UTCMay 15, 03:05 UTC10h 25m
2026-05-14 SJX851 CTS → TPE May 14, 11:05 UTCMay 14, 11:40 UTC35m
2026-05-14 SJX851 CTS → TPE May 14, 08:00 UTCMay 14, 09:45 UTC1h 45m
2026-05-14 SJX850 TPE → CTS May 14, 02:35 UTCMay 14, 06:05 UTC3h 30m
2026-05-13 SJX011 SFO → TPE May 13, 20:25 UTCMay 13, 20:50 UTC25m
2026-05-13 SJX011 SFO → TPE May 13, 08:10 UTCMay 13, 19:05 UTC10h 55m
2026-05-12 SJX012 TPE → SFO May 12, 16:25 UTCMay 13, 03:05 UTC10h 40m
2026-05-12 SJX202 MFM → TPE May 12, 03:15 UTCMay 12, 04:25 UTC1h 10m
2026-05-11 SJX772 SIN → TPE May 11, 09:25 UTCMay 11, 10:35 UTC1h 10m
2026-05-11 SJX771 TPE → SIN May 11, 00:25 UTCMay 11, 03:55 UTC3h 30m
2026-05-10 SJX011 SFO → TPE May 10, 08:25 UTCMay 10, 21:14 UTC12h 50m
2026-05-09 SJX012 TPE → SFO May 9, 16:40 UTCMay 10, 03:10 UTC10h 30m
2026-05-09 SJX746 BKK → TPE May 9, 11:55 UTCMay 9, 14:55 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 7h ago.
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, SJX012, SJX011, SJX002, SJX851.