Apparatus

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sensors Mode-S transponder

8991E6

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-58503 · AIRBUS A-350-900

Hex
8991E6
Octal
42310746
Decimal
9,015,782
Country
TW
Tail
B-58503
Type
A359
No current signal · last broadcast Jul 26, 20:05 UTC
Flights observed
286
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 20:05 UTC

Last known position

Most recent position reported by Mode-S 8991E6.

Country allocation

The ICAO 24-bit address 8991E6 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
SJX771 STARLUX Airlines 25 2026-07-24
SJX031 STARLUX Airlines 25 2026-07-26
SJX772 STARLUX Airlines 24 2026-07-24
SJX032 STARLUX Airlines 23 2026-07-25
SJX012 STARLUX Airlines 16 2026-07-22
SJX002 - 16 2026-07-18
SJX011 STARLUX Airlines 15 2026-07-23
SJX001 - 15 2026-07-19
SJX742 - 14 2026-07-07
SJX851 - 12 2026-07-13
SJX823 STARLUX Airlines 10 2026-06-06
SJX871 STARLUX Airlines 9 2026-07-25
SJX870 STARLUX Airlines 9 2026-07-25
SJX822 STARLUX Airlines 9 2026-06-06
SJX741 - 9 2026-07-07
SJX010 - 9 2026-07-01
SJX009 - 9 2026-07-02
SJX850 - 8 2026-07-13
SJX235 STARLUX Airlines 5 2026-04-27
SJX821 - 4 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SJX031 SEA → TPE Jul 26, 19:40 UTCJul 26, 20:05 UTC25m
2026-07-26 SJX031 SEA → TPE Jul 26, 08:35 UTCJul 26, 18:30 UTC9h 55m
2026-07-25 SJX032 TPE → SEA Jul 25, 14:00 UTCJul 25, 23:15 UTC9h 15m
2026-07-25 SJX032 TPE → SEA Jul 25, 12:30 UTCJul 25, 12:45 UTC15m
2026-07-25 SJX871 OKA → TPE Jul 25, 08:05 UTCJul 25, 08:30 UTC25m
2026-07-25 SJX870 TPE → OKA Jul 25, 04:35 UTCJul 25, 05:00 UTC25m
2026-07-24 SJX772 SIN → TPE Jul 24, 10:05 UTCJul 24, 11:15 UTC1h 10m
2026-07-24 SJX772 SIN → TPE Jul 24, 07:00 UTCJul 24, 07:20 UTC20m
2026-07-24 SJX771 TPE → SIN Jul 24, 04:45 UTCJul 24, 04:55 UTC10m
2026-07-24 SJX771 TPE → SIN Jul 24, 01:05 UTCJul 24, 02:05 UTC1h 0m
2026-07-23 SJX011 SFO → TPE Jul 23, 19:50 UTCJul 23, 20:10 UTC20m
2026-07-23 SJX011 SFO → TPE Jul 23, 08:10 UTCJul 23, 18:30 UTC10h 20m
2026-07-22 SJX012 TPE → SFO Jul 22, 16:35 UTCJul 23, 04:25 UTC11h 50m
2026-07-21 SJX772 SIN → TPE Jul 21, 06:45 UTCJul 21, 10:55 UTC4h 10m
2026-07-21 SJX771 TPE → SIN Jul 21, 04:10 UTCJul 21, 04:30 UTC20m
2026-07-21 SJX771 TPE → SIN Jul 21, 00:45 UTCJul 21, 01:40 UTC55m
2026-07-20 SJX772 SIN → TPE Jul 20, 06:30 UTCJul 20, 10:40 UTC4h 10m
2026-07-20 SJX771 - Jul 20, 04:15 UTCJul 20, 04:35 UTC20m
2026-07-20 SJX771 - Jul 20, 00:40 UTCJul 20, 01:40 UTC1h 0m
2026-07-19 SJX001 - Jul 19, 08:25 UTCJul 19, 21:05 UTC12h 40m
2026-07-18 SJX002 - Jul 18, 16:50 UTCJul 19, 05:00 UTC12h 10m
2026-07-18 SJX772 - Jul 18, 06:40 UTCJul 18, 11:00 UTC4h 20m
2026-07-18 SJX771 - Jul 18, 01:05 UTCJul 18, 04:45 UTC3h 41m
2026-07-17 SJX011 - Jul 17, 19:35 UTCJul 17, 20:00 UTC25m
2026-07-17 SJX011 - Jul 17, 08:04 UTCJul 17, 18:34 UTC10h 30m
2026-07-16 SJX012 - Jul 16, 18:00 UTCJul 17, 05:04 UTC11h 5m
2026-07-16 SJX012 - Jul 16, 17:20 UTCJul 16, 17:30 UTC10m
2026-07-16 SJX772 - Jul 16, 07:05 UTCJul 16, 11:20 UTC4h 15m
2026-07-16 SJX771 - Jul 16, 04:25 UTCJul 16, 04:50 UTC25m
2026-07-16 SJX771 - Jul 16, 01:00 UTCJul 16, 02:00 UTC1h 0m
2026-07-15 SJX001 - Jul 15, 20:15 UTCJul 15, 20:35 UTC20m
2026-07-15 SJX001 - Jul 15, 08:05 UTCJul 15, 19:05 UTC11h 0m
2026-07-14 SJX002 - Jul 14, 16:50 UTCJul 15, 05:05 UTC12h 14m
2026-07-14 SJX821 KIX → TPE Jul 14, 04:50 UTCJul 14, 07:05 UTC2h 15m
2026-07-14 SJX820 TPE → KIX Jul 14, 00:55 UTCJul 14, 03:10 UTC2h 15m
2026-07-13 SJX851 - Jul 13, 07:55 UTCJul 13, 11:15 UTC3h 20m
2026-07-13 SJX850 TPE → CTS Jul 13, 02:30 UTCJul 13, 06:10 UTC3h 40m
2026-07-12 SJX841 - Jul 12, 06:20 UTCJul 12, 08:15 UTC1h 55m
2026-07-12 SJX840 - Jul 12, 03:30 UTCJul 12, 03:50 UTC20m
2026-07-12 SJX840 - Jul 12, 02:05 UTCJul 12, 02:30 UTC25m
2026-07-11 SJX031 - Jul 11, 08:25 UTCJul 11, 19:45 UTC11h 20m
2026-07-10 SJX032 - Jul 10, 12:45 UTCJul 10, 21:45 UTC9h 0m
2026-07-10 SJX032 - Jul 10, 11:15 UTCJul 10, 11:30 UTC15m
2026-07-10 SJX772 - Jul 10, 05:20 UTCJul 10, 09:35 UTC4h 15m
2026-07-10 SJX3771 - Jul 10, 02:50 UTCJul 10, 03:10 UTC20m
2026-07-09 SJX3771 - Jul 9, 23:20 UTCJul 10, 00:05 UTC45m
2026-07-09 SJX001 - Jul 9, 07:55 UTCJul 9, 20:55 UTC13h 0m
2026-07-08 SJX002 - Jul 8, 16:30 UTCJul 9, 04:15 UTC11h 45m
2026-07-08 SJX871 - Jul 8, 07:10 UTCJul 8, 08:10 UTC1h 0m
2026-07-08 SJX870 - Jul 8, 04:15 UTCJul 8, 04:40 UTC25m

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-58503 page for operator, model, and routing details .

Mode-S 8991E6 frequently asked

What is Mode-S code 8991E6?
8991E6 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-58503.
Where is Mode-S 8991E6 registered?
Mode-S code 8991E6 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8991E6 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8991E6, octal 42310746, decimal 9,015,782.
What flights does 8991E6 operate?
Mode-S 8991E6 has broadcast 20 distinct callsigns, including SJX771, SJX031, SJX772, SJX032, SJX012.