Apparatus

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sensors Mode-S transponder

8991DE

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-58303 · AIRBUS A-330-900

Hex
8991DE
Octal
42310736
Decimal
9,015,774
Country
TW
Tail
B-58303
Type
A339
Broadcasting now · callsign SJX201 · 15,925 ft
Flights observed
202
Distinct callsigns
20
Country
TW
Last broadcast
23d ago

Current position

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

Country allocation

The ICAO 24-bit address 8991DE 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
SJX841 - 20 2026-07-08
SJX840 - 18 2026-07-08
SJX863 STARLUX Airlines 13 2026-07-23
SJX821 STARLUX Airlines 13 2026-07-26
SJX862 STARLUX Airlines 12 2026-07-23
SJX235 - 10 2026-07-16
SJX233 STARLUX Airlines 10 2026-07-26
SJX820 STARLUX Airlines 9 2026-07-26
SJX236 - 9 2026-07-16
SJX234 STARLUX Airlines 8 2026-07-26
SJX711 - 7 2026-07-09
SJX746 STARLUX Airlines 6 2026-07-25
SJX745 STARLUX Airlines 6 2026-07-25
SJX202 STARLUX Airlines 6 2026-07-21
SJX805 - 5 2026-07-19
SJX206 - 5 2026-07-03
SJX205 - 5 2026-07-03
SJX804 STARLUX Airlines 4 2026-07-19
SJX803 - 4 2026-06-20
SJX712 - 4 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SJX234 HKG → TPE Jul 26, 12:40 UTCJul 26, 14:00 UTC1h 20m
2026-07-26 SJX233 TPE → HKG Jul 26, 09:05 UTCJul 26, 10:35 UTC1h 30m
2026-07-26 SJX821 KIX → TPE Jul 26, 04:45 UTCJul 26, 07:05 UTC2h 21m
2026-07-26 SJX820 TPE → KIX Jul 26, 00:50 UTCJul 26, 03:05 UTC2h 15m
2026-07-25 SJX746 BKK → TPE Jul 25, 11:45 UTCJul 25, 15:10 UTC3h 25m
2026-07-25 SJX745 TPE → BKK Jul 25, 06:30 UTCJul 25, 09:50 UTC3h 20m
2026-07-24 SJX746 BKK → TPE Jul 24, 11:25 UTCJul 24, 15:15 UTC3h 50m
2026-07-24 SJX745 TPE → BKK Jul 24, 06:20 UTCJul 24, 09:40 UTC3h 20m
2026-07-23 SJX863 SDJ → TPE Jul 23, 11:45 UTCJul 23, 12:10 UTC25m
2026-07-23 SJX863 SDJ → TPE Jul 23, 09:10 UTCJul 23, 10:30 UTC1h 20m
2026-07-23 SJX862 TPE → SDJ Jul 23, 05:20 UTCJul 23, 06:35 UTC1h 15m
2026-07-23 SJX862 TPE → SDJ Jul 23, 03:45 UTCJul 23, 04:00 UTC15m
2026-07-22 SJX863 SDJ → TPE Jul 22, 11:30 UTCJul 22, 11:40 UTC10m
2026-07-22 SJX862 TPE → SDJ Jul 22, 04:15 UTCJul 22, 10:25 UTC6h 10m
2026-07-21 SJX714 SGN → TPE Jul 21, 06:40 UTCJul 21, 14:30 UTC7h 50m
2026-07-21 SJX202 MFM → TPE Jul 21, 03:25 UTCJul 21, 04:45 UTC1h 20m
2026-07-21 SJX201 TPE → MFM Jul 21, 00:10 UTCJul 21, 01:35 UTC1h 25m
2026-07-20 SJX746 - Jul 20, 11:10 UTCJul 20, 14:35 UTC3h 25m
2026-07-20 SJX745 TPE → BKK Jul 20, 06:15 UTCJul 20, 09:25 UTC3h 10m
2026-07-19 SJX805 NRT → TPE Jul 19, 12:10 UTCJul 19, 15:20 UTC3h 10m
2026-07-19 SJX804 TPE → NRT Jul 19, 07:15 UTCJul 19, 10:15 UTC3h 0m
2026-07-19 SJX234 HKG → TPE Jul 19, 03:50 UTCJul 19, 05:30 UTC1h 40m
2026-07-19 SJX233 TPE → HKG Jul 19, 00:55 UTCJul 19, 02:10 UTC1h 15m
2026-07-18 SJX805 NRT → TPE Jul 18, 12:25 UTCJul 18, 15:05 UTC2h 40m
2026-07-18 SJX804 - Jul 18, 07:30 UTCJul 18, 10:40 UTC3h 10m
2026-07-18 SJX234 HKG → TPE Jul 18, 04:05 UTCJul 18, 05:45 UTC1h 40m
2026-07-18 SJX233 TPE → HKG Jul 18, 00:04 UTCJul 18, 01:20 UTC1h 15m
2026-07-17 SJX805 - Jul 17, 14:50 UTCJul 17, 15:29 UTC40m
2026-07-17 SJX805 - Jul 17, 12:25 UTCJul 17, 13:45 UTC1h 20m
2026-07-17 SJX804 TPE → NRT Jul 17, 07:25 UTCJul 17, 10:30 UTC3h 5m
2026-07-17 SJX234 HKG → TPE Jul 17, 03:45 UTCJul 17, 05:25 UTC1h 40m
2026-07-17 SJX233 TPE → HKG Jul 17, 00:30 UTCJul 17, 01:55 UTC1h 25m
2026-07-16 SJX236 - Jul 16, 12:30 UTCJul 16, 14:10 UTC1h 40m
2026-07-16 SJX235 TPE → HKG Jul 16, 09:50 UTCJul 16, 11:05 UTC1h 15m
2026-07-16 SJX821 - Jul 16, 06:40 UTCJul 16, 06:55 UTC15m
2026-07-16 SJX821 - Jul 16, 04:45 UTCJul 16, 05:25 UTC40m
2026-07-16 SJX820 TPE → KIX Jul 16, 00:55 UTCJul 16, 03:15 UTC2h 20m
2026-07-15 SJX714 TPE → TPE Jul 15, 06:40 UTCJul 15, 14:50 UTC8h 10m
2026-07-15 SJX786 - Jul 15, 03:05 UTCJul 15, 04:45 UTC1h 40m
2026-07-14 SJX785 - Jul 14, 23:35 UTCJul 15, 01:20 UTC1h 45m
2026-07-14 SJX236 HKG → TPE Jul 14, 13:15 UTCJul 14, 14:40 UTC1h 25m
2026-07-14 SJX235 - Jul 14, 10:15 UTCJul 14, 11:35 UTC1h 20m
2026-07-14 SJX234 HKG → TPE Jul 14, 04:05 UTCJul 14, 05:35 UTC1h 30m
2026-07-14 SJX233 - Jul 14, 00:10 UTCJul 14, 01:30 UTC1h 20m
2026-07-13 SJX236 - Jul 13, 12:55 UTCJul 13, 14:20 UTC1h 25m
2026-07-13 SJX235 - Jul 13, 09:20 UTCJul 13, 10:45 UTC1h 25m
2026-07-13 SJX821 - Jul 13, 06:30 UTCJul 13, 06:55 UTC25m
2026-07-13 SJX821 - Jul 13, 04:40 UTCJul 13, 05:25 UTC45m
2026-07-13 SJX820 TPE → KIX Jul 13, 00:50 UTCJul 13, 03:10 UTC2h 20m
2026-07-12 SJX713 TPE → TPE Jul 12, 06:40 UTCJul 12, 15:01 UTC8h 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-58303 page for operator, model, and routing details .

Mode-S 8991DE frequently asked

What is Mode-S code 8991DE?
8991DE is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-58303.
Where is Mode-S 8991DE registered?
Mode-S code 8991DE is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8991DE broadcasting right now?
Yes. Mode-S 8991DE is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8991DE, octal 42310736, decimal 9,015,774.
What flights does 8991DE operate?
Mode-S 8991DE has broadcast 20 distinct callsigns, including SJX841, SJX840, SJX863, SJX821, SJX862.