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sensors Mode-S transponder

8990C1

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-58507 · AIRBUS A-350-900

Hex
8990C1
Octal
42310301
Decimal
9,015,489
Country
TW
Tail
B-58507
Type
A359
Broadcasting now · callsign SJX002 · 41,000 ft
Flights observed
278
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 19:35 UTC

Current position

8990C1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 8990C1 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
SJX025 STARLUX Airlines 20 2026-06-01
SJX851 STARLUX Airlines 19 2026-07-24
SJX001 - 19 2026-07-11
SJX742 STARLUX Airlines 18 2026-07-26
SJX741 STARLUX Airlines 17 2026-07-26
SJX026 STARLUX Airlines 17 2026-05-31
SJX002 - 17 2026-07-06
SJX850 STARLUX Airlines 15 2026-07-24
SJX032 - 15 2026-07-13
SJX771 STARLUX Airlines 14 2026-07-22
SJX012 STARLUX Airlines 14 2026-07-26
SJX772 STARLUX Airlines 13 2026-07-22
SJX011 STARLUX Airlines 13 2026-07-25
SJX031 - 12 2026-07-14
SJX823 STARLUX Airlines 10 2026-06-10
SJX871 - 7 2026-07-13
SJX822 STARLUX Airlines 6 2026-06-10
SJX010 - 5 2026-07-17
SJX009 - 5 2026-07-18
SJX803 - 4 2026-06-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SJX012 TPE → SFO Jul 26, 16:40 UTCJul 26, 19:35 UTC2h 55m
2026-07-26 SJX742 BKK → TPE Jul 26, 06:35 UTCJul 26, 09:55 UTC3h 20m
2026-07-26 SJX741 TPE → BKK Jul 26, 01:15 UTCJul 26, 04:25 UTC3h 10m
2026-07-25 SJX011 SFO → TPE Jul 25, 19:55 UTCJul 25, 20:10 UTC15m
2026-07-25 SJX011 SFO → TPE Jul 25, 08:15 UTCJul 25, 18:40 UTC10h 25m
2026-07-24 SJX012 TPE → SFO Jul 24, 18:50 UTCJul 25, 04:55 UTC10h 5m
2026-07-24 SJX012 TPE → SFO Jul 24, 17:20 UTCJul 24, 17:30 UTC10m
2026-07-24 SJX851 CTS → TPE Jul 24, 07:55 UTCJul 24, 11:20 UTC3h 25m
2026-07-24 SJX850 TPE → CTS Jul 24, 04:00 UTCJul 24, 05:55 UTC1h 55m
2026-07-24 SJX850 TPE → CTS Jul 24, 02:35 UTCJul 24, 02:45 UTC10m
2026-07-23 SJX851 CTS → TPE Jul 23, 11:00 UTCJul 23, 11:20 UTC20m
2026-07-23 SJX851 CTS → TPE Jul 23, 07:55 UTCJul 23, 09:50 UTC1h 55m
2026-07-23 SJX850 TPE → CTS Jul 23, 02:40 UTCJul 23, 06:05 UTC3h 25m
2026-07-22 SJX772 SIN → TPE Jul 22, 11:10 UTCJul 22, 11:30 UTC20m
2026-07-22 SJX771 TPE → SIN Jul 22, 00:35 UTCJul 22, 04:40 UTC4h 5m
2026-07-21 SJX011 SFO → TPE Jul 21, 19:55 UTCJul 21, 20:10 UTC15m
2026-07-21 SJX011 SFO → TPE Jul 21, 08:00 UTCJul 21, 19:20 UTC11h 20m
2026-07-20 SJX012 TPE → SFO Jul 20, 16:25 UTCJul 21, 04:20 UTC11h 54m
2026-07-20 SJX851 CTS → TPE Jul 20, 10:40 UTCJul 20, 11:05 UTC25m
2026-07-20 SJX851 CTS → TPE Jul 20, 07:45 UTCJul 20, 09:45 UTC2h 0m
2026-07-20 SJX850 TPE → CTS Jul 20, 02:35 UTCJul 20, 05:55 UTC3h 20m
2026-07-19 SJX851 CTS → TPE Jul 19, 07:45 UTCJul 19, 11:10 UTC3h 25m
2026-07-19 SJX850 TPE → CTS Jul 19, 02:20 UTCJul 19, 05:45 UTC3h 25m
2026-07-18 SJX009 - Jul 18, 19:15 UTCJul 18, 19:30 UTC15m
2026-07-18 SJX009 - Jul 18, 07:15 UTCJul 18, 18:15 UTC11h 0m
2026-07-17 SJX010 - Jul 17, 14:04 UTCJul 18, 00:55 UTC10h 50m
2026-07-17 SJX010 - Jul 17, 12:30 UTCJul 17, 12:50 UTC20m
2026-07-17 SJX742 - Jul 17, 09:10 UTCJul 17, 10:25 UTC1h 15m
2026-07-17 SJX742 - Jul 17, 06:54 UTCJul 17, 07:05 UTC10m
2026-07-17 SJX741 - Jul 17, 04:44 UTCJul 17, 04:59 UTC15m
2026-07-17 SJX741 - Jul 17, 01:59 UTCJul 17, 02:54 UTC55m
2026-07-16 SJX009 - Jul 16, 19:35 UTCJul 16, 19:50 UTC15m
2026-07-16 SJX009 - Jul 16, 07:10 UTCJul 16, 18:59 UTC11h 50m
2026-07-15 SJX010 - Jul 15, 14:20 UTCJul 16, 00:45 UTC10h 25m
2026-07-15 SJX010 - Jul 15, 12:30 UTCJul 15, 12:45 UTC15m
2026-07-15 SJX841 - Jul 15, 07:15 UTCJul 15, 07:40 UTC25m
2026-07-15 SJX841 - Jul 15, 05:50 UTCJul 15, 06:05 UTC15m
2026-07-15 SJX840 - Jul 15, 01:45 UTCJul 15, 03:20 UTC1h 35m
2026-07-14 SJX031 - Jul 14, 08:25 UTCJul 14, 20:05 UTC11h 40m
2026-07-13 SJX032 - Jul 13, 14:15 UTCJul 13, 23:40 UTC9h 25m
2026-07-13 SJX032 - Jul 13, 12:45 UTCJul 13, 13:05 UTC20m
2026-07-13 SJX871 - Jul 13, 07:50 UTCJul 13, 08:55 UTC1h 5m
2026-07-13 SJX870 - Jul 13, 04:45 UTCJul 13, 05:15 UTC30m
2026-07-12 SJX772 - Jul 12, 06:20 UTCJul 12, 10:55 UTC4h 35m
2026-07-12 SJX771 - Jul 12, 04:01 UTCJul 12, 04:20 UTC20m
2026-07-12 SJX771 - Jul 12, 00:25 UTCJul 12, 01:00 UTC35m
2026-07-11 SJX001 LAX → TPE Jul 11, 08:10 UTCJul 11, 20:50 UTC12h 40m
2026-07-10 SJX3002 - Jul 10, 12:35 UTCJul 10, 22:40 UTC10h 5m
2026-07-10 SJX3002 - Jul 10, 10:45 UTCJul 10, 11:00 UTC15m
2026-07-10 SJX742 - Jul 10, 05:35 UTCJul 10, 08:50 UTC3h 15m

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-58507 page for operator, model, and routing details .

Mode-S 8990C1 frequently asked

What is Mode-S code 8990C1?
8990C1 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-58507.
Where is Mode-S 8990C1 registered?
Mode-S code 8990C1 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8990C1 broadcasting right now?
Yes. Mode-S 8990C1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8990C1, octal 42310301, decimal 9,015,489.
What flights does 8990C1 operate?
Mode-S 8990C1 has broadcast 20 distinct callsigns, including SJX025, SJX851, SJX001, SJX742, SJX741.