Apparatus

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sensors Mode-S transponder

8991E8

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-58505 · AIRBUS A-350-900

Hex
8991E8
Octal
42310750
Decimal
9,015,784
Country
TW
Tail
B-58505
Type
A359
No current signal · last broadcast 1d ago
Flights observed
237
Distinct callsigns
20
Country
TW
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 8991E8.

Country allocation

The ICAO 24-bit address 8991E8 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
SJX031 STARLUX Airlines 18 2026-06-04
SJX011 - 17 2026-07-09
SJX032 STARLUX Airlines 15 2026-06-03
SJX851 - 12 2026-07-07
SJX772 - 12 2026-07-06
SJX771 - 12 2026-07-06
SJX026 STARLUX Airlines 12 2026-06-27
SJX012 - 12 2026-07-08
SJX002 - 11 2026-07-04
SJX850 - 10 2026-07-10
SJX742 - 9 2026-06-25
SJX741 - 9 2026-06-25
SJX025 - 9 2026-06-28
SJX871 - 8 2026-06-27
SJX870 - 7 2026-06-27
SJX010 - 7 2026-06-29
SJX009 - 7 2026-06-30
SJX001 - 7 2026-07-05
SJX201 STARLUX Airlines 5 2026-05-17
SJX823 STARLUX Airlines 4 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SJX841 - Jul 13, 06:55 UTCJul 13, 07:35 UTC40m
2026-07-13 SJX841 - Jul 13, 05:40 UTCJul 13, 05:50 UTC10m
2026-07-13 SJX840 - Jul 13, 01:55 UTCJul 13, 03:30 UTC1h 35m
2026-07-12 SJX3851 - Jul 12, 07:25 UTCJul 12, 07:55 UTC30m
2026-07-12 SJX3851 - Jul 12, 04:35 UTCJul 12, 06:30 UTC1h 55m
2026-07-10 SJX850 - Jul 10, 02:25 UTCJul 10, 05:55 UTC3h 30m
2026-07-09 SJX011 - Jul 9, 20:55 UTCJul 9, 21:20 UTC25m
2026-07-09 SJX011 - Jul 9, 08:50 UTCJul 9, 19:45 UTC10h 55m
2026-07-08 SJX012 - Jul 8, 16:20 UTCJul 9, 03:35 UTC11h 15m
2026-07-08 SJX803 NRT → TPE Jul 8, 07:45 UTCJul 8, 10:30 UTC2h 45m
2026-07-08 SJX802 TPE → NRT Jul 8, 03:00 UTCJul 8, 06:05 UTC3h 5m
2026-07-07 SJX851 - Jul 7, 10:45 UTCJul 7, 11:05 UTC20m
2026-07-07 SJX851 - Jul 7, 07:45 UTCJul 7, 09:40 UTC1h 55m
2026-07-07 SJX850 - Jul 7, 02:30 UTCJul 7, 06:00 UTC3h 30m
2026-07-06 SJX772 - Jul 6, 06:30 UTCJul 6, 10:35 UTC4h 5m
2026-07-06 SJX771 - Jul 6, 04:05 UTCJul 6, 04:25 UTC20m
2026-07-06 SJX771 - Jul 6, 00:35 UTCJul 6, 01:35 UTC1h 0m
2026-07-05 SJX001 - Jul 5, 07:55 UTCJul 5, 20:45 UTC12h 50m
2026-07-04 SJX002 - Jul 4, 18:10 UTCJul 5, 04:20 UTC10h 10m
2026-07-04 SJX002 - Jul 4, 16:45 UTCJul 4, 17:00 UTC15m
2026-07-04 SJX851 - Jul 4, 10:55 UTCJul 4, 11:15 UTC20m
2026-07-04 SJX851 - Jul 4, 07:45 UTCJul 4, 09:50 UTC2h 5m
2026-07-04 SJX850 - Jul 4, 02:35 UTCJul 4, 05:55 UTC3h 20m
2026-07-03 SJX772 - Jul 3, 06:55 UTCJul 3, 11:20 UTC4h 25m
2026-07-03 SJX771 - Jul 3, 00:45 UTCJul 3, 04:40 UTC3h 55m
2026-07-02 SJX011 - Jul 2, 20:30 UTCJul 2, 20:50 UTC20m
2026-07-02 SJX011 - Jul 2, 08:35 UTCJul 2, 09:05 UTC30m
2026-07-01 SJX012 TPE → SFO Jul 1, 16:40 UTCJul 2, 03:30 UTC10h 50m
2026-07-01 SJX772 - Jul 1, 06:20 UTCJul 1, 10:35 UTC4h 15m
2026-07-01 SJX771 - Jul 1, 00:25 UTCJul 1, 04:10 UTC3h 45m
2026-06-30 SJX009 - Jun 30, 06:25 UTCJun 30, 19:40 UTC13h 15m
2026-06-29 SJX010 - Jun 29, 14:14 UTCJun 29, 23:44 UTC9h 30m
2026-06-29 SJX010 - Jun 29, 12:29 UTCJun 29, 12:45 UTC15m
2026-06-28 SJX025 - Jun 28, 06:44 UTCJun 28, 20:39 UTC13h 55m
2026-06-27 SJX026 TPE → PHX Jun 27, 14:05 UTCJun 28, 00:20 UTC10h 15m
2026-06-27 SJX026 TPE → PHX Jun 27, 12:34 UTCJun 27, 12:55 UTC20m
2026-06-27 SJX871 - Jun 27, 09:00 UTCJun 27, 09:29 UTC30m
2026-06-27 SJX870 - Jun 27, 04:44 UTCJun 27, 04:54 UTC10m
2026-06-26 SJX025 - Jun 26, 20:20 UTCJun 26, 20:44 UTC25m
2026-06-26 SJX025 - Jun 26, 06:45 UTCJun 26, 08:00 UTC1h 15m
2026-06-25 SJX026 TPE → PHX Jun 25, 14:14 UTCJun 26, 00:39 UTC10h 25m
2026-06-25 SJX026 TPE → PHX Jun 25, 12:44 UTCJun 25, 13:05 UTC20m
2026-06-25 SJX742 - Jun 25, 06:35 UTCJun 25, 09:59 UTC3h 25m
2026-06-25 SJX741 TPE → BKK Jun 25, 01:50 UTCJun 25, 04:49 UTC3h 0m
2026-06-24 SJX001 - Jun 24, 08:09 UTCJun 24, 21:19 UTC13h 10m
2026-06-23 SJX002 - Jun 23, 18:25 UTCJun 24, 03:29 UTC9h 5m
2026-06-23 SJX002 - Jun 23, 16:29 UTCJun 23, 16:50 UTC20m
2026-06-23 SJX851 - Jun 23, 11:04 UTCJun 23, 11:35 UTC30m
2026-06-23 SJX851 - Jun 23, 07:49 UTCJun 23, 09:45 UTC1h 55m
2026-06-23 SJX850 TPE → CTS Jun 23, 02:24 UTCJun 23, 05:49 UTC3h 25m

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-58505 page for operator, model, and routing details .

Mode-S 8991E8 frequently asked

What is Mode-S code 8991E8?
8991E8 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-58505.
Where is Mode-S 8991E8 registered?
Mode-S code 8991E8 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8991E8 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8991E8, octal 42310750, decimal 9,015,784.
What flights does 8991E8 operate?
Mode-S 8991E8 has broadcast 20 distinct callsigns, including SJX031, SJX011, SJX032, SJX851, SJX772.