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sensors Mode-S transponder

8991E1

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-58306 · AIRBUS A-330-900

Hex
8991E1
Octal
42310741
Decimal
9,015,777
Country
TW
Tail
B-58306
Type
A339
Broadcasting now · callsign SJX862 · 37,000 ft
Flights observed
377
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 15:25 UTC

Current position

8991E1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 8991E1 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
SJX839 STARLUX Airlines 37 2026-07-25
SJX847 STARLUX Airlines 35 2026-07-26
SJX846 STARLUX Airlines 32 2026-07-25
SJX863 STARLUX Airlines 27 2026-07-24
SJX838 STARLUX Airlines 27 2026-07-25
SJX862 STARLUX Airlines 24 2026-07-24
SJX841 - 20 2026-06-24
SJX805 STARLUX Airlines 16 2026-07-26
SJX840 - 14 2026-06-24
SJX201 - 14 2026-07-09
SJX804 STARLUX Airlines 12 2026-07-26
SJX202 - 12 2026-07-09
SJX205 - 10 2026-06-24
SJX821 - 9 2026-06-15
SJX746 - 9 2026-07-17
SJX745 - 9 2026-07-17
SJX235 - 9 2026-06-15
SJX206 - 9 2026-06-24
SJX820 - 7 2026-06-15
SJX236 STARLUX Airlines 7 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SJX805 NRT → TPE Jul 26, 12:40 UTCJul 26, 15:25 UTC2h 45m
2026-07-26 SJX804 TPE → NRT Jul 26, 07:15 UTCJul 26, 10:15 UTC3h 0m
2026-07-26 SJX847 KMJ → TPE Jul 26, 04:05 UTCJul 26, 05:05 UTC1h 0m
2026-07-26 SJX847 KMJ → TPE Jul 26, 03:15 UTCJul 26, 03:25 UTC10m
2026-07-25 SJX846 TPE → KMJ Jul 25, 23:40 UTCJul 26, 00:00 UTC20m
2026-07-25 SJX839 NGO → TPE Jul 25, 13:25 UTCJul 25, 13:40 UTC15m
2026-07-25 SJX839 NGO → TPE Jul 25, 11:20 UTCJul 25, 12:00 UTC40m
2026-07-25 SJX838 TPE → NGO Jul 25, 08:50 UTCJul 25, 09:25 UTC35m
2026-07-25 SJX838 TPE → NGO Jul 25, 07:15 UTCJul 25, 07:30 UTC15m
2026-07-25 SJX847 KMJ → TPE Jul 25, 04:45 UTCJul 25, 05:05 UTC20m
2026-07-25 SJX847 KMJ → TPE Jul 25, 03:15 UTCJul 25, 03:25 UTC10m
2026-07-24 SJX846 TPE → KMJ Jul 24, 23:45 UTCJul 25, 00:25 UTC40m
2026-07-24 SJX863 SDJ → TPE Jul 24, 11:20 UTCJul 24, 11:50 UTC30m
2026-07-24 SJX863 SDJ → TPE Jul 24, 08:50 UTCJul 24, 10:10 UTC1h 20m
2026-07-24 SJX862 TPE → SDJ Jul 24, 05:30 UTCJul 24, 06:45 UTC1h 15m
2026-07-24 SJX862 TPE → SDJ Jul 24, 04:05 UTCJul 24, 04:20 UTC15m
2026-07-23 SJX839 NGO → TPE Jul 23, 14:10 UTCJul 23, 14:40 UTC30m
2026-07-23 SJX839 NGO → TPE Jul 23, 12:05 UTCJul 23, 13:40 UTC1h 35m
2026-07-23 SJX838 TPE → NGO Jul 23, 08:10 UTCJul 23, 10:20 UTC2h 10m
2026-07-23 SJX847 KMJ → TPE Jul 23, 06:10 UTCJul 23, 06:20 UTC10m
2026-07-22 SJX846 TPE → KMJ Jul 22, 23:50 UTCJul 23, 00:40 UTC50m
2026-07-22 SJX839 NGO → TPE Jul 22, 11:20 UTCJul 22, 13:40 UTC2h 20m
2026-07-22 SJX847 KMJ → TPE Jul 22, 05:05 UTCJul 22, 05:25 UTC20m
2026-07-21 SJX846 TPE → KMJ Jul 21, 23:40 UTCJul 22, 00:25 UTC45m
2026-07-21 SJX711 TPE → SGN Jul 21, 00:20 UTCJul 21, 08:05 UTC7h 45m
2026-07-20 SJX863 SDJ → TPE Jul 20, 08:45 UTCJul 20, 11:40 UTC2h 55m
2026-07-20 SJX862 TPE → SDJ Jul 20, 03:50 UTCJul 20, 06:40 UTC2h 50m
2026-07-19 SJX863 SDJ → TPE Jul 19, 08:55 UTCJul 19, 11:50 UTC2h 55m
2026-07-19 SJX862 TPE → SDJ Jul 19, 03:50 UTCJul 19, 06:30 UTC2h 40m
2026-07-18 SJX847 - Jul 18, 04:55 UTCJul 18, 05:10 UTC15m
2026-07-18 SJX847 - Jul 18, 03:35 UTCJul 18, 03:55 UTC20m
2026-07-17 SJX846 TPE → KMJ Jul 17, 23:45 UTCJul 18, 00:00 UTC15m
2026-07-17 SJX746 - Jul 17, 13:55 UTCJul 17, 15:29 UTC1h 35m
2026-07-17 SJX746 - Jul 17, 11:39 UTCJul 17, 11:55 UTC15m
2026-07-17 SJX745 - Jul 17, 09:15 UTCJul 17, 09:40 UTC25m
2026-07-17 SJX745 - Jul 17, 06:29 UTCJul 17, 07:25 UTC55m
2026-07-16 SJX712 - Jul 16, 00:10 UTCJul 16, 08:15 UTC8h 5m
2026-07-15 SJX839 - Jul 15, 13:35 UTCJul 15, 13:55 UTC20m
2026-07-15 SJX839 - Jul 15, 11:40 UTCJul 15, 12:30 UTC50m
2026-07-15 SJX838 - Jul 15, 07:10 UTCJul 15, 09:35 UTC2h 25m
2026-07-15 SJX847 - Jul 15, 04:50 UTCJul 15, 05:10 UTC20m
2026-07-15 SJX847 - Jul 15, 03:25 UTCJul 15, 03:35 UTC10m
2026-07-15 SJX846 - Jul 15, 01:45 UTCJul 15, 01:55 UTC10m
2026-07-14 SJX846 - Jul 14, 23:55 UTCJul 15, 00:45 UTC50m
2026-07-14 SJX746 - Jul 14, 13:30 UTCJul 14, 14:50 UTC1h 20m
2026-07-14 SJX746 - Jul 14, 11:25 UTCJul 14, 11:40 UTC15m
2026-07-14 SJX745 - Jul 14, 09:05 UTCJul 14, 09:45 UTC40m
2026-07-14 SJX745 - Jul 14, 06:15 UTCJul 14, 07:10 UTC55m
2026-07-13 SJX863 - Jul 13, 08:45 UTCJul 13, 11:35 UTC2h 50m
2026-07-13 SJX862 - Jul 13, 03:45 UTCJul 13, 06:45 UTC3h 0m

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-58306 page for operator, model, and routing details .

Mode-S 8991E1 frequently asked

What is Mode-S code 8991E1?
8991E1 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-58306.
Where is Mode-S 8991E1 registered?
Mode-S code 8991E1 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8991E1 broadcasting right now?
Yes. Mode-S 8991E1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8991E1, octal 42310741, decimal 9,015,777.
What flights does 8991E1 operate?
Mode-S 8991E1 has broadcast 20 distinct callsigns, including SJX839, SJX847, SJX846, SJX863, SJX838.