Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

8991E2

ICAO 24-bit transponder address · allocated to Taiwan

Hex
8991E2
Octal
42310742
Decimal
9,015,778
Country
TW
No current signal · last broadcast Jul 26, 11:40 UTC
Flights observed
379
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 11:40 UTC

Last known position

Most recent position reported by Mode-S 8991E2.

Country allocation

The ICAO 24-bit address 8991E2 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 36 2026-07-24
SJX821 - 35 2026-07-08
SJX847 STARLUX Airlines 25 2026-07-24
SJX838 STARLUX Airlines 25 2026-07-24
SJX846 STARLUX Airlines 24 2026-07-23
SJX820 - 20 2026-07-08
SJX235 - 19 2026-07-02
SJX863 STARLUX Airlines 18 2026-07-26
SJX862 STARLUX Airlines 15 2026-07-26
SJX805 STARLUX Airlines 15 2026-07-22
SJX236 - 14 2026-07-02
SJX841 - 13 2026-06-26
SJX205 - 12 2026-07-12
SJX840 - 11 2026-06-26
SJX233 STARLUX Airlines 10 2026-07-22
SJX202 - 10 2026-06-14
SJX746 - 9 2026-07-18
SJX745 - 9 2026-07-18
SJX234 STARLUX Airlines 9 2026-07-22
SJX206 - 9 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SJX863 SDJ → TPE Jul 26, 08:45 UTCJul 26, 11:40 UTC2h 55m
2026-07-26 SJX862 TPE → SDJ Jul 26, 03:45 UTCJul 26, 06:30 UTC2h 45m
2026-07-25 SJX863 SDJ → TPE Jul 25, 11:35 UTCJul 25, 11:50 UTC15m
2026-07-25 SJX863 SDJ → TPE Jul 25, 09:00 UTCJul 25, 10:20 UTC1h 20m
2026-07-25 SJX862 TPE → SDJ Jul 25, 05:35 UTCJul 25, 06:45 UTC1h 10m
2026-07-25 SJX862 TPE → SDJ Jul 25, 04:00 UTCJul 25, 04:20 UTC20m
2026-07-24 SJX839 NGO → TPE Jul 24, 13:55 UTCJul 24, 14:50 UTC55m
2026-07-24 SJX839 NGO → TPE Jul 24, 11:40 UTCJul 24, 13:15 UTC1h 35m
2026-07-24 SJX838 TPE → NGO Jul 24, 07:35 UTCJul 24, 09:45 UTC2h 10m
2026-07-24 SJX847 KMJ → TPE Jul 24, 04:55 UTCJul 24, 05:20 UTC25m
2026-07-24 SJX847 KMJ → TPE Jul 24, 03:30 UTCJul 24, 03:40 UTC10m
2026-07-23 SJX846 TPE → KMJ Jul 23, 23:45 UTCJul 24, 00:00 UTC15m
2026-07-23 SJX711 TPE → SGN Jul 23, 00:05 UTCJul 23, 08:15 UTC8h 10m
2026-07-22 SJX805 NRT → TPE Jul 22, 14:50 UTCJul 22, 15:10 UTC20m
2026-07-22 SJX805 NRT → TPE Jul 22, 12:20 UTCJul 22, 13:35 UTC1h 15m
2026-07-22 SJX234 HKG → TPE Jul 22, 04:00 UTCJul 22, 05:25 UTC1h 25m
2026-07-22 SJX233 TPE → HKG Jul 22, 00:25 UTCJul 22, 01:45 UTC1h 20m
2026-07-21 SJX839 NGO → TPE Jul 21, 13:30 UTCJul 21, 13:50 UTC20m
2026-07-21 SJX839 NGO → TPE Jul 21, 11:20 UTCJul 21, 12:10 UTC50m
2026-07-21 SJX838 TPE → NGO Jul 21, 07:20 UTCJul 21, 09:45 UTC2h 25m
2026-07-21 SJX847 KMJ → TPE Jul 21, 05:15 UTCJul 21, 05:35 UTC20m
2026-07-21 SJX847 KMJ → TPE Jul 21, 03:45 UTCJul 21, 04:00 UTC15m
2026-07-20 SJX846 TPE → KMJ Jul 20, 23:45 UTCJul 21, 00:35 UTC50m
2026-07-20 SJX714 TPE → TPE Jul 20, 06:50 UTCJul 20, 14:30 UTC7h 40m
2026-07-20 SJX234 HKG → TPE Jul 20, 03:45 UTCJul 20, 05:15 UTC1h 30m
2026-07-20 SJX233 TPE → HKG Jul 20, 00:20 UTCJul 20, 01:40 UTC1h 20m
2026-07-19 SJX839 - Jul 19, 13:15 UTCJul 19, 13:45 UTC30m
2026-07-19 SJX839 - Jul 19, 11:20 UTCJul 19, 12:20 UTC1h 0m
2026-07-19 SJX838 TPE → NGO Jul 19, 07:00 UTCJul 19, 09:25 UTC2h 25m
2026-07-19 SJX847 KMJ → TPE Jul 19, 04:30 UTCJul 19, 05:00 UTC30m
2026-07-18 SJX846 TPE → KMJ Jul 18, 23:50 UTCJul 19, 00:35 UTC45m
2026-07-18 SJX746 - Jul 18, 13:35 UTCJul 18, 14:45 UTC1h 10m
2026-07-18 SJX746 - Jul 18, 11:15 UTCJul 18, 11:30 UTC15m
2026-07-18 SJX745 - Jul 18, 09:10 UTCJul 18, 09:20 UTC10m
2026-07-18 SJX745 - Jul 18, 06:25 UTCJul 18, 07:30 UTC1h 5m
2026-07-17 SJX863 - Jul 17, 11:04 UTCJul 17, 11:35 UTC30m
2026-07-17 SJX863 - Jul 17, 08:40 UTCJul 17, 10:15 UTC1h 35m
2026-07-17 SJX862 - Jul 17, 03:50 UTCJul 17, 06:45 UTC2h 55m
2026-07-16 SJX863 - Jul 16, 11:15 UTCJul 16, 11:25 UTC10m
2026-07-16 SJX863 - Jul 16, 08:40 UTCJul 16, 10:00 UTC1h 20m
2026-07-16 SJX862 - Jul 16, 03:55 UTCJul 16, 06:45 UTC2h 50m
2026-07-15 SJX234 HKG → TPE Jul 15, 03:55 UTCJul 15, 05:30 UTC1h 35m
2026-07-15 SJX233 - Jul 15, 00:15 UTCJul 15, 01:25 UTC1h 10m
2026-07-14 SJX839 - Jul 14, 11:35 UTCJul 14, 13:50 UTC2h 15m
2026-07-14 SJX838 - Jul 14, 07:05 UTCJul 14, 09:20 UTC2h 15m
2026-07-14 SJX847 - Jul 14, 04:45 UTCJul 14, 05:25 UTC40m
2026-07-14 SJX847 - Jul 14, 03:25 UTCJul 14, 03:40 UTC15m
2026-07-13 SJX846 - Jul 13, 23:50 UTCJul 14, 00:35 UTC45m
2026-07-13 SJX839 - Jul 13, 11:20 UTCJul 13, 13:45 UTC2h 25m
2026-07-13 SJX838 - Jul 13, 07:25 UTCJul 13, 09:45 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.

Mode-S 8991E2 frequently asked

What is Mode-S code 8991E2?
8991E2 is an ICAO 24-bit transponder address. Allocated to Taiwan.
Where is Mode-S 8991E2 registered?
Mode-S code 8991E2 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8991E2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8991E2, octal 42310742, decimal 9,015,778.
What flights does 8991E2 operate?
Mode-S 8991E2 has broadcast 20 distinct callsigns, including SJX839, SJX821, SJX847, SJX838, SJX846.