Apparatus

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sensors Mode-S transponder

8991DC

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-58301 · AIRBUS A-330-900

Hex
8991DC
Octal
42310734
Decimal
9,015,772
Country
TW
Tail
B-58301
Type
A339
Transponder active on ground
Flights observed
353
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 15:05 UTC

Last known position

Most recent position reported by Mode-S 8991DC.

Country allocation

The ICAO 24-bit address 8991DC 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
SJX863 - 36 2026-06-24
SJX862 - 32 2026-06-24
SJX805 - 23 2026-07-16
SJX841 - 21 2026-07-06
SJX804 - 20 2026-07-16
SJX235 STARLUX Airlines 20 2026-07-24
SJX821 STARLUX Airlines 16 2026-07-24
SJX236 STARLUX Airlines 16 2026-07-24
SJX840 - 15 2026-07-06
SJX820 STARLUX Airlines 15 2026-07-24
SJX233 STARLUX Airlines 12 2026-07-25
SJX839 STARLUX Airlines 10 2026-06-06
SJX746 - 10 2026-07-15
SJX745 - 10 2026-07-15
SJX202 - 10 2026-07-16
SJX234 STARLUX Airlines 9 2026-07-25
SJX201 - 9 2026-07-16
SJX712 - 8 2026-07-18
SJX847 STARLUX Airlines 7 2026-06-06
SJX838 STARLUX Airlines 7 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SJX714 SGN → TPE Jul 26, 06:30 UTCJul 26, 15:05 UTC8h 36m
2026-07-25 SJX234 HKG → TPE Jul 25, 04:00 UTCJul 25, 05:25 UTC1h 25m
2026-07-25 SJX233 TPE → HKG Jul 25, 00:15 UTCJul 25, 01:25 UTC1h 10m
2026-07-24 SJX236D HKG → TPE Jul 24, 17:10 UTCJul 24, 18:30 UTC1h 20m
2026-07-24 SJX236 HKG → TPE Jul 24, 14:50 UTCJul 24, 15:05 UTC15m
2026-07-24 SJX236 HKG → TPE Jul 24, 13:00 UTCJul 24, 14:15 UTC1h 15m
2026-07-24 SJX235 TPE → HKG Jul 24, 09:20 UTCJul 24, 10:35 UTC1h 15m
2026-07-24 SJX821 KIX → TPE Jul 24, 07:00 UTCJul 24, 07:25 UTC25m
2026-07-24 SJX821 KIX → TPE Jul 24, 05:00 UTCJul 24, 05:45 UTC45m
2026-07-24 SJX820 TPE → KIX Jul 24, 02:40 UTCJul 24, 03:25 UTC45m
2026-07-24 SJX820 TPE → KIX Jul 24, 01:10 UTCJul 24, 01:25 UTC15m
2026-07-23 SJX236 - Jul 23, 12:55 UTCJul 23, 14:20 UTC1h 25m
2026-07-23 SJX235 TPE → HKG Jul 23, 10:10 UTCJul 23, 10:25 UTC15m
2026-07-23 SJX235 TPE → HKG Jul 23, 09:10 UTCJul 23, 09:40 UTC30m
2026-07-23 SJX821 KIX → TPE Jul 23, 06:50 UTCJul 23, 07:05 UTC15m
2026-07-23 SJX821 KIX → TPE Jul 23, 04:50 UTCJul 23, 05:35 UTC45m
2026-07-23 SJX820 TPE → KIX Jul 23, 01:00 UTCJul 23, 03:20 UTC2h 20m
2026-07-22 SJX714 SGN → TPE Jul 22, 13:20 UTCJul 22, 14:45 UTC1h 25m
2026-07-22 SJX786 MNL → TPE Jul 22, 03:15 UTCJul 22, 05:00 UTC1h 45m
2026-07-21 SJX785 TPE → MNL Jul 21, 23:45 UTCJul 22, 01:35 UTC1h 50m
2026-07-21 SJX206 MFM → TPE Jul 21, 13:55 UTCJul 21, 15:15 UTC1h 20m
2026-07-21 SJX205 TPE → MFM Jul 21, 10:00 UTCJul 21, 11:05 UTC1h 5m
2026-07-18 SJX712 - Jul 18, 00:00 UTCJul 18, 08:10 UTC8h 11m
2026-07-17 SJX712 TPE → TPE Jul 17, 00:10 UTCJul 17, 08:20 UTC8h 10m
2026-07-16 SJX805 - Jul 16, 15:10 UTCJul 16, 15:30 UTC20m
2026-07-16 SJX805 - Jul 16, 12:30 UTCJul 16, 13:49 UTC1h 20m
2026-07-16 SJX804 - Jul 16, 09:15 UTCJul 16, 10:40 UTC1h 25m
2026-07-16 SJX804 - Jul 16, 07:40 UTCJul 16, 07:55 UTC15m
2026-07-16 SJX202 - Jul 16, 03:15 UTCJul 16, 04:40 UTC1h 25m
2026-07-16 SJX201 - Jul 16, 00:20 UTCJul 16, 01:25 UTC1h 5m
2026-07-15 SJX746 - Jul 15, 13:45 UTCJul 15, 14:55 UTC1h 10m
2026-07-15 SJX746 - Jul 15, 11:30 UTCJul 15, 11:45 UTC15m
2026-07-15 SJX745 - Jul 15, 09:20 UTCJul 15, 09:50 UTC30m
2026-07-15 SJX745 - Jul 15, 06:30 UTCJul 15, 07:20 UTC50m
2026-07-14 SJX712 - Jul 14, 00:50 UTCJul 14, 08:45 UTC7h 55m
2026-07-13 SJX713 TPE → TPE Jul 13, 06:35 UTCJul 13, 14:45 UTC8h 10m
2026-07-13 SJX202 - Jul 13, 03:20 UTCJul 13, 04:40 UTC1h 20m
2026-07-13 SJX201 - Jul 13, 00:20 UTCJul 13, 01:30 UTC1h 10m
2026-07-12 SJX746 - Jul 12, 13:40 UTCJul 12, 14:45 UTC1h 5m
2026-07-12 SJX746 - Jul 12, 11:15 UTCJul 12, 11:30 UTC15m
2026-07-12 SJX745 - Jul 12, 09:10 UTCJul 12, 09:20 UTC10m
2026-07-12 SJX745 - Jul 12, 06:10 UTCJul 12, 06:55 UTC45m
2026-07-12 SJX3805 NRT → TPE Jul 12, 01:20 UTCJul 12, 04:10 UTC2h 50m
2026-07-10 SJX804 TPE → NRT Jul 10, 07:30 UTCJul 10, 10:25 UTC2h 55m
2026-07-10 SJX234 HKG → TPE Jul 10, 04:25 UTCJul 10, 05:50 UTC1h 25m
2026-07-10 SJX233 TPE → HKG Jul 10, 01:20 UTCJul 10, 02:40 UTC1h 20m
2026-07-09 SJX236 HKG → TPE Jul 9, 13:00 UTCJul 9, 14:45 UTC1h 45m
2026-07-09 SJX235 - Jul 9, 09:20 UTCJul 9, 10:35 UTC1h 15m
2026-07-09 SJX821 KIX → TPE Jul 9, 04:55 UTCJul 9, 07:15 UTC2h 20m
2026-07-09 SJX820 TPE → KIX Jul 9, 01:10 UTCJul 9, 03:30 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-58301 page for operator, model, and routing details .

Mode-S 8991DC frequently asked

What is Mode-S code 8991DC?
8991DC is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-58301.
Where is Mode-S 8991DC registered?
Mode-S code 8991DC is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8991DC broadcasting right now?
Mode-S 8991DC is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8991DC, octal 42310734, decimal 9,015,772.
What flights does 8991DC operate?
Mode-S 8991DC has broadcast 20 distinct callsigns, including SJX863, SJX862, SJX805, SJX841, SJX804.