Apparatus

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sensors Mode-S transponder

8991D8

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-58210 · AIRBUS A-321neo

Hex
8991D8
Octal
42310730
Decimal
9,015,768
Country
TW
Tail
B-58210
Type
A21N
Broadcasting now · callsign SJX762 · 30,975 ft
Flights observed
331
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 14:10 UTC

Current position

8991D8 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 8991D8 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
SJX332 - 14 2026-07-05
SJX315 - 14 2026-07-02
SJX307 - 14 2026-07-08
SJX331 - 13 2026-07-05
SJX726 STARLUX Airlines 12 2026-07-26
SJX312 - 11 2026-07-08
SJX314 - 10 2026-07-02
SJX306 - 10 2026-07-08
SJX301 - 10 2026-07-09
SJX786 STARLUX Airlines 9 2026-07-21
SJX785 - 9 2026-07-20
SJX313 - 9 2026-07-08
SJX235 STARLUX Airlines 9 2026-07-22
SJX761 - 8 2026-07-10
SJX725 STARLUX Airlines 8 2026-07-26
SJX713 STARLUX Airlines 7 2026-06-15
SJX303 - 7 2026-07-07
SJX302 - 7 2026-07-07
SJX300 - 7 2026-07-09
SJX762 - 6 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SJX726 KUL → TPE Jul 26, 09:55 UTCJul 26, 14:10 UTC4h 15m
2026-07-26 SJX725 TPE → KUL Jul 26, 03:30 UTCJul 26, 07:55 UTC4h 26m
2026-07-25 SJX726 KUL → TPE Jul 25, 09:50 UTCJul 25, 14:05 UTC4h 15m
2026-07-25 SJX725 TPE → KUL Jul 25, 03:40 UTCJul 25, 08:00 UTC4h 20m
2026-07-25 SJX2528 - Jul 25, 00:50 UTCJul 25, 01:15 UTC25m
2026-07-24 SJX861 HKD → TPE Jul 24, 12:30 UTCJul 24, 13:30 UTC1h 0m
2026-07-24 SJX861 HKD → TPE Jul 24, 09:25 UTCJul 24, 11:10 UTC1h 45m
2026-07-24 SJX860 TPE → HKD Jul 24, 06:20 UTCJul 24, 08:05 UTC1h 45m
2026-07-24 SJX860 TPE → HKD Jul 24, 04:50 UTCJul 24, 05:10 UTC20m
2026-07-23 SJX703 TPE → DAD Jul 23, 08:25 UTCJul 23, 15:00 UTC6h 35m
2026-07-22 SJX781 TPE → CEB Jul 22, 23:20 UTCJul 23, 05:55 UTC6h 35m
2026-07-22 SJX236 HKG → TPE Jul 22, 12:20 UTCJul 22, 14:00 UTC1h 40m
2026-07-22 SJX235 TPE → HKG Jul 22, 11:10 UTCJul 22, 11:25 UTC15m
2026-07-22 SJX890 TPE → SHI Jul 22, 03:05 UTCJul 22, 03:30 UTC25m
2026-07-21 SJX704 TPE → TPE Jul 21, 08:30 UTCJul 21, 14:45 UTC6h 15m
2026-07-21 SJX786 MNL → TPE Jul 21, 03:15 UTCJul 21, 05:00 UTC1h 45m
2026-07-20 SJX785 TPE → MNL Jul 20, 23:30 UTCJul 21, 01:15 UTC1h 44m
2026-07-20 SJX204 - Jul 20, 10:50 UTCJul 20, 12:20 UTC1h 30m
2026-07-20 SJX203 - Jul 20, 07:45 UTCJul 20, 08:55 UTC1h 10m
2026-07-20 SJX901 PUS → TPE Jul 20, 04:00 UTCJul 20, 05:50 UTC1h 50m
2026-07-20 SJX900 TPE → PUS Jul 20, 00:30 UTCJul 20, 02:30 UTC2h 0m
2026-07-19 SJX792 CRK → TPE Jul 19, 13:20 UTCJul 19, 14:55 UTC1h 35m
2026-07-19 SJX791 - Jul 19, 10:00 UTCJul 19, 11:45 UTC1h 45m
2026-07-19 SJX901 PUS → TPE Jul 19, 06:35 UTCJul 19, 08:35 UTC2h 0m
2026-07-19 SJX900 TPE → PUS Jul 19, 02:55 UTCJul 19, 04:50 UTC1h 55m
2026-07-18 SJX726 - Jul 18, 12:55 UTCJul 18, 14:15 UTC1h 20m
2026-07-18 SJX726 - Jul 18, 09:45 UTCJul 18, 10:00 UTC15m
2026-07-18 SJX725 - Jul 18, 03:40 UTCJul 18, 08:05 UTC4h 25m
2026-07-17 SJX861 - Jul 17, 09:10 UTCJul 17, 12:35 UTC3h 25m
2026-07-17 SJX860 TPE → HKD Jul 17, 04:44 UTCJul 17, 07:55 UTC3h 10m
2026-07-16 SJX903 - Jul 16, 12:25 UTCJul 16, 12:49 UTC25m
2026-07-16 SJX903 - Jul 16, 10:45 UTCJul 16, 11:05 UTC20m
2026-07-16 SJX902 - Jul 16, 08:50 UTCJul 16, 09:10 UTC20m
2026-07-16 SJX902 - Jul 16, 07:20 UTCJul 16, 07:35 UTC15m
2026-07-15 SJX236 - Jul 15, 13:05 UTCJul 15, 14:40 UTC1h 35m
2026-07-15 SJX235 TPE → HKG Jul 15, 09:00 UTCJul 15, 10:30 UTC1h 30m
2026-07-15 SJX891 - Jul 15, 05:30 UTCJul 15, 05:45 UTC15m
2026-07-15 SJX890 - Jul 15, 02:55 UTCJul 15, 03:10 UTC15m
2026-07-14 SJX786 MNL → TPE Jul 14, 03:00 UTCJul 14, 04:45 UTC1h 45m
2026-07-13 SJX785 - Jul 13, 23:25 UTCJul 14, 01:10 UTC1h 45m
2026-07-13 SJX861 - Jul 13, 09:25 UTCJul 13, 12:35 UTC3h 10m
2026-07-13 SJX860 TPE → HKD Jul 13, 04:45 UTCJul 13, 08:05 UTC3h 20m
2026-07-12 SJX236 HKG → TPE Jul 12, 12:55 UTCJul 12, 14:25 UTC1h 30m
2026-07-12 SJX235 TPE → HKG Jul 12, 09:20 UTCJul 12, 10:35 UTC1h 15m
2026-07-12 SJX716 - Jul 12, 05:40 UTCJul 12, 07:10 UTC1h 30m
2026-07-12 SJX716 - Jul 12, 04:45 UTCJul 12, 05:01 UTC15m
2026-07-12 SJX715 - Jul 12, 00:20 UTCJul 12, 01:30 UTC1h 10m
2026-07-10 SJX762 - Jul 10, 06:20 UTCJul 10, 09:45 UTC3h 25m
2026-07-10 SJX762 - Jul 10, 04:45 UTCJul 10, 04:55 UTC10m
2026-07-10 SJX761 - Jul 10, 03:05 UTCJul 10, 03:20 UTC15m

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-58210 page for operator, model, and routing details .

Mode-S 8991D8 frequently asked

What is Mode-S code 8991D8?
8991D8 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-58210.
Where is Mode-S 8991D8 registered?
Mode-S code 8991D8 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8991D8 broadcasting right now?
Yes. Mode-S 8991D8 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8991D8, octal 42310730, decimal 9,015,768.
What flights does 8991D8 operate?
Mode-S 8991D8 has broadcast 20 distinct callsigns, including SJX332, SJX315, SJX307, SJX331, SJX726.