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sensors Mode-S transponder

8991E7

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-58504 · AIRBUS A-350-900

Hex
8991E7
Octal
42310747
Decimal
9,015,783
Country
TW
Tail
B-58504
Type
A359
No current signal · last broadcast Jul 26, 10:50 UTC
Flights observed
270
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 10:50 UTC

Last known position

Most recent position reported by Mode-S 8991E7.

Country allocation

The ICAO 24-bit address 8991E7 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
SJX011 - 33 2026-07-16
SJX012 - 32 2026-07-15
SJX823 - 15 2026-07-15
SJX772 STARLUX Airlines 15 2026-07-26
SJX771 STARLUX Airlines 15 2026-07-26
SJX001 - 15 2026-07-25
SJX822 - 13 2026-07-15
SJX002 - 13 2026-07-24
SJX742 - 10 2026-07-13
SJX741 - 10 2026-07-13
SJX031 STARLUX Airlines 10 2026-07-21
SJX032 - 8 2026-07-20
SJX010 - 7 2026-07-18
SJX009 - 7 2026-07-19
SJX851 - 6 2026-06-30
SJX850 STARLUX Airlines 6 2026-07-22
SJX235 STARLUX Airlines 6 2026-04-30
SJX026 STARLUX Airlines 6 2026-06-13
SJX025 - 6 2026-06-14
SJX821 STARLUX Airlines 5 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SJX772 SIN → TPE Jul 26, 09:35 UTCJul 26, 10:50 UTC1h 15m
2026-07-26 SJX771 TPE → SIN Jul 26, 04:05 UTCJul 26, 04:25 UTC20m
2026-07-26 SJX771 TPE → SIN Jul 26, 00:35 UTCJul 26, 01:35 UTC1h 0m
2026-07-25 SJX001 - Jul 25, 20:25 UTCJul 25, 20:40 UTC15m
2026-07-25 SJX001 - Jul 25, 08:05 UTCJul 25, 19:10 UTC11h 5m
2026-07-24 SJX002 - Jul 24, 18:40 UTCJul 25, 05:10 UTC10h 30m
2026-07-24 SJX002 - Jul 24, 17:15 UTCJul 24, 17:25 UTC10m
2026-07-23 SJX001 - Jul 23, 20:10 UTCJul 23, 20:30 UTC20m
2026-07-23 SJX001 - Jul 23, 08:00 UTCJul 23, 18:50 UTC10h 50m
2026-07-22 SJX002 - Jul 22, 16:35 UTCJul 23, 04:40 UTC12h 5m
2026-07-22 SJX850 TPE → CTS Jul 22, 02:35 UTCJul 22, 05:25 UTC2h 50m
2026-07-21 SJX031 SEA → TPE Jul 21, 20:05 UTCJul 21, 20:25 UTC20m
2026-07-21 SJX031 SEA → TPE Jul 21, 08:35 UTCJul 21, 19:35 UTC11h 0m
2026-07-20 SJX032 TPE → SEA Jul 20, 12:55 UTCJul 21, 00:05 UTC11h 10m
2026-07-19 SJX009 - Jul 19, 07:05 UTCJul 19, 19:50 UTC12h 45m
2026-07-18 SJX010 - Jul 18, 14:30 UTCJul 19, 00:55 UTC10h 25m
2026-07-18 SJX010 - Jul 18, 12:40 UTCJul 18, 12:50 UTC10m
2026-07-18 SJX871 - Jul 18, 08:30 UTCJul 18, 08:50 UTC20m
2026-07-18 SJX870 - Jul 18, 04:35 UTCJul 18, 04:50 UTC15m
2026-07-17 SJX841 - Jul 17, 07:00 UTCJul 17, 07:20 UTC20m
2026-07-17 SJX841 - Jul 17, 05:39 UTCJul 17, 05:50 UTC10m
2026-07-17 SJX840 TPE → FUK Jul 17, 02:10 UTCJul 17, 03:50 UTC1h 40m
2026-07-16 SJX011 - Jul 16, 20:19 UTCJul 16, 20:35 UTC15m
2026-07-16 SJX011 - Jul 16, 08:30 UTCJul 16, 19:10 UTC10h 40m
2026-07-15 SJX012 - Jul 15, 17:35 UTCJul 16, 04:45 UTC11h 10m
2026-07-15 SJX012 - Jul 15, 16:45 UTCJul 15, 17:05 UTC20m
2026-07-15 SJX823 - Jul 15, 08:50 UTCJul 15, 09:05 UTC15m
2026-07-15 SJX823 - Jul 15, 07:00 UTCJul 15, 07:35 UTC35m
2026-07-15 SJX822 - Jul 15, 04:05 UTCJul 15, 04:45 UTC40m
2026-07-15 SJX822 - Jul 15, 02:30 UTCJul 15, 02:45 UTC15m
2026-07-14 SJX001 - Jul 14, 08:10 UTCJul 14, 20:35 UTC12h 25m
2026-07-13 SJX002 - Jul 13, 17:30 UTCJul 14, 05:05 UTC11h 35m
2026-07-13 SJX002 - Jul 13, 16:35 UTCJul 13, 17:00 UTC25m
2026-07-13 SJX742 - Jul 13, 09:00 UTCJul 13, 09:50 UTC50m
2026-07-13 SJX742 - Jul 13, 06:30 UTCJul 13, 06:45 UTC15m
2026-07-13 SJX741 - Jul 13, 04:25 UTCJul 13, 04:45 UTC20m
2026-07-13 SJX741 - Jul 13, 01:40 UTCJul 13, 02:45 UTC1h 5m
2026-07-12 SJX742 - Jul 12, 09:35 UTCJul 12, 10:30 UTC55m
2026-07-12 SJX742 - Jul 12, 07:15 UTCJul 12, 07:25 UTC10m
2026-07-12 SJX741 - Jul 12, 04:40 UTCJul 12, 04:55 UTC15m
2026-07-12 SJX741 - Jul 12, 01:50 UTCJul 12, 02:15 UTC25m
2026-07-11 SJX011 - Jul 11, 20:00 UTCJul 11, 20:25 UTC25m
2026-07-11 SJX011 - Jul 11, 08:15 UTCJul 11, 18:50 UTC10h 35m
2026-07-10 SJX3012 - Jul 10, 11:50 UTCJul 10, 21:20 UTC9h 30m
2026-07-10 SJX3012 - Jul 10, 09:55 UTCJul 10, 10:10 UTC15m
2026-07-09 SJX031 - Jul 9, 19:45 UTCJul 9, 20:05 UTC20m
2026-07-09 SJX031 - Jul 9, 08:30 UTCJul 9, 18:30 UTC10h 0m
2026-07-08 SJX032 TPE → SEA Jul 8, 12:40 UTCJul 8, 23:05 UTC10h 25m
2026-07-08 SJX823 KIX → TPE Jul 8, 06:30 UTCJul 8, 08:40 UTC2h 10m
2026-07-08 SJX822 TPE → KIX Jul 8, 02:35 UTCJul 8, 04:55 UTC2h 20m

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-58504 page for operator, model, and routing details .

Mode-S 8991E7 frequently asked

What is Mode-S code 8991E7?
8991E7 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-58504.
Where is Mode-S 8991E7 registered?
Mode-S code 8991E7 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8991E7 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 10:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8991E7, octal 42310747, decimal 9,015,783.
What flights does 8991E7 operate?
Mode-S 8991E7 has broadcast 20 distinct callsigns, including SJX011, SJX012, SJX823, SJX772, SJX771.