Apparatus

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sensors Mode-S transponder

8991DD

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-58302 · AIRBUS A-330-900

Hex
8991DD
Octal
42310735
Decimal
9,015,773
Country
TW
Tail
B-58302
Type
A339
No current signal · last broadcast Jul 26, 08:15 UTC
Flights observed
382
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 08:15 UTC

Last known position

Most recent position reported by Mode-S 8991DD.

Country allocation

The ICAO 24-bit address 8991DD 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 - 28 2026-07-08
SJX841 - 26 2026-07-10
SJX805 - 25 2026-07-15
SJX862 - 24 2026-07-08
SJX839 - 23 2026-07-16
SJX840 - 21 2026-07-10
SJX821 STARLUX Airlines 20 2026-07-25
SJX820 STARLUX Airlines 18 2026-07-25
SJX838 - 17 2026-07-16
SJX804 - 17 2026-07-15
SJX235 STARLUX Airlines 16 2026-07-25
SJX233 - 16 2026-07-16
SJX847 - 15 2026-06-15
SJX846 STARLUX Airlines 13 2026-06-14
SJX236 STARLUX Airlines 13 2026-07-25
SJX234 - 13 2026-07-16
SJX201 STARLUX Airlines 12 2026-07-23
SJX205 STARLUX Airlines 10 2026-07-24
SJX746 STARLUX Airlines 9 2026-07-22
SJX206 STARLUX Airlines 9 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SJX712 SGN → TPE Jul 26, 00:05 UTCJul 26, 08:10 UTC8h 6m
2026-07-25 SJX236 HKG → TPE Jul 25, 14:35 UTCJul 25, 15:20 UTC45m
2026-07-25 SJX236 HKG → TPE Jul 25, 13:50 UTCJul 25, 14:05 UTC15m
2026-07-25 SJX235 TPE → HKG Jul 25, 10:25 UTCJul 25, 12:00 UTC1h 35m
2026-07-25 SJX821 KIX → TPE Jul 25, 06:50 UTCJul 25, 07:10 UTC20m
2026-07-25 SJX821 KIX → TPE Jul 25, 04:50 UTCJul 25, 05:35 UTC45m
2026-07-25 SJX820 TPE → KIX Jul 25, 02:25 UTCJul 25, 03:00 UTC35m
2026-07-25 SJX820 TPE → KIX Jul 25, 00:50 UTCJul 25, 01:05 UTC15m
2026-07-24 SJX206 MFM → TPE Jul 24, 15:15 UTCJul 24, 16:40 UTC1h 25m
2026-07-24 SJX205 TPE → MFM Jul 24, 10:00 UTCJul 24, 11:05 UTC1h 5m
2026-07-24 SJX711 TPE → SGN Jul 24, 00:10 UTCJul 24, 08:10 UTC8h 0m
2026-07-23 SJX713 TPE → SGN Jul 23, 06:50 UTCJul 23, 14:45 UTC7h 55m
2026-07-23 SJX202 MFM → TPE Jul 23, 03:25 UTCJul 23, 04:45 UTC1h 20m
2026-07-23 SJX201 TPE → MFM Jul 23, 00:15 UTCJul 23, 01:25 UTC1h 10m
2026-07-22 SJX746 BKK → TPE Jul 22, 11:20 UTCJul 22, 14:55 UTC3h 35m
2026-07-21 SJX746 BKK → TPE Jul 21, 11:10 UTCJul 21, 14:40 UTC3h 30m
2026-07-21 SJX745 TPE → BKK Jul 21, 06:15 UTCJul 21, 09:20 UTC3h 5m
2026-07-19 SJX712 SGN → TPE Jul 19, 23:55 UTCJul 20, 08:15 UTC8h 20m
2026-07-19 SJX746 - Jul 19, 13:50 UTCJul 19, 14:55 UTC1h 5m
2026-07-19 SJX746 - Jul 19, 11:25 UTCJul 19, 11:40 UTC15m
2026-07-19 SJX745 TPE → BKK Jul 19, 09:10 UTCJul 19, 09:25 UTC15m
2026-07-19 SJX745 TPE → BKK Jul 19, 06:20 UTCJul 19, 07:30 UTC1h 10m
2026-07-18 SJX236 HKG → TPE Jul 18, 13:10 UTCJul 18, 14:35 UTC1h 25m
2026-07-18 SJX235 - Jul 18, 09:10 UTCJul 18, 10:30 UTC1h 20m
2026-07-18 SJX821 - Jul 18, 06:45 UTCJul 18, 07:00 UTC15m
2026-07-18 SJX821 - Jul 18, 04:50 UTCJul 18, 05:30 UTC40m
2026-07-18 SJX820 - Jul 18, 02:40 UTCJul 18, 03:20 UTC41m
2026-07-18 SJX820 - Jul 18, 00:55 UTCJul 18, 01:05 UTC10m
2026-07-17 SJX236 HKG → TPE Jul 17, 13:00 UTCJul 17, 14:39 UTC1h 40m
2026-07-17 SJX235 TPE → HKG Jul 17, 09:15 UTCJul 17, 10:30 UTC1h 15m
2026-07-17 SJX821 - Jul 17, 06:35 UTCJul 17, 06:54 UTC20m
2026-07-17 SJX821 - Jul 17, 04:25 UTCJul 17, 05:25 UTC1h 0m
2026-07-17 SJX820 TPE → KIX Jul 17, 00:55 UTCJul 17, 03:14 UTC2h 20m
2026-07-16 SJX839 - Jul 16, 14:40 UTCJul 16, 15:00 UTC20m
2026-07-16 SJX839 - Jul 16, 12:30 UTCJul 16, 13:10 UTC40m
2026-07-16 SJX838 - Jul 16, 09:55 UTCJul 16, 10:35 UTC40m
2026-07-16 SJX838 - Jul 16, 08:15 UTCJul 16, 08:35 UTC20m
2026-07-16 SJX234 HKG → TPE Jul 16, 04:45 UTCJul 16, 06:25 UTC1h 40m
2026-07-16 SJX233 - Jul 16, 00:10 UTCJul 16, 01:25 UTC1h 15m
2026-07-15 SJX805 - Jul 15, 14:35 UTCJul 15, 14:50 UTC15m
2026-07-15 SJX805 - Jul 15, 12:05 UTCJul 15, 13:20 UTC1h 15m
2026-07-15 SJX804 - Jul 15, 08:55 UTCJul 15, 10:20 UTC1h 25m
2026-07-15 SJX804 - Jul 15, 07:15 UTCJul 15, 07:30 UTC15m
2026-07-15 SJX202 - Jul 15, 03:10 UTCJul 15, 04:35 UTC1h 25m
2026-07-15 SJX201 - Jul 15, 00:20 UTCJul 15, 01:25 UTC1h 5m
2026-07-14 SJX714 - Jul 14, 06:50 UTCJul 14, 14:55 UTC8h 5m
2026-07-13 SJX711 - Jul 13, 00:01 UTCJul 13, 07:55 UTC7h 55m
2026-07-12 SJX805 NRT → TPE Jul 12, 12:30 UTCJul 12, 15:30 UTC3h 0m
2026-07-12 SJX804 TPE → NRT Jul 12, 07:10 UTCJul 12, 10:15 UTC3h 5m
2026-07-12 SJX234 - Jul 12, 04:45 UTCJul 12, 05:20 UTC35m

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-58302 page for operator, model, and routing details .

Mode-S 8991DD frequently asked

What is Mode-S code 8991DD?
8991DD is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-58302.
Where is Mode-S 8991DD registered?
Mode-S code 8991DD is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8991DD broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 08:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8991DD, octal 42310735, decimal 9,015,773.
What flights does 8991DD operate?
Mode-S 8991DD has broadcast 20 distinct callsigns, including SJX863, SJX841, SJX805, SJX862, SJX839.