sensors Mode-S transponder

8990BE

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-58205 · AIRBUS A-321neo

Hex
8990BE
Octal
42310276
Decimal
9,015,486
Country
TW
Tail
B-58205
Type
A21N
No current signal · last broadcast 15h ago
Flights observed
8
Distinct callsigns
6
Country
TW
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S 8990BE.

Country allocation

The ICAO 24-bit address 8990BE 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 6 distinct

Callsign Airline Flights Last seen
SJX713 - 2 2026-04-14
SJX711 STARLUX Airlines 2 2026-04-13
SJX792 - 1 2026-04-13
SJX791 - 1 2026-04-13
SJX785 STARLUX Airlines 1 2026-04-13
SJX712 - 1 2026-04-13

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-14 SJX713 - Apr 14, 07:10 UTCApr 14, 07:50 UTC40m
2026-04-14 SJX713 - Apr 14, 06:45 UTCApr 14, 07:10 UTC25m
2026-04-13 SJX785 TPE → MNL Apr 13, 23:20 UTCApr 13, 23:40 UTC20m
2026-04-13 SJX792 - Apr 13, 12:55 UTCApr 13, 14:30 UTC1h 35m
2026-04-13 SJX791 - Apr 13, 09:35 UTCApr 13, 11:15 UTC1h 40m
2026-04-13 SJX712 - Apr 13, 06:40 UTCApr 13, 07:50 UTC1h 10m
2026-04-13 SJX711 TPE → SGN Apr 13, 00:20 UTCApr 13, 01:10 UTC50m
2026-04-13 SJX711 TPE → SGN Apr 13, 00:05 UTCApr 13, 01:10 UTC1h 5m

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-58205 page for operator, model, and routing details .

Mode-S 8990BE frequently asked

What is Mode-S code 8990BE?
8990BE is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-58205.
Where is Mode-S 8990BE registered?
Mode-S code 8990BE is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8990BE broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8990BE, octal 42310276, decimal 9,015,486.
What flights does 8990BE operate?
Mode-S 8990BE has broadcast 6 distinct callsigns, including SJX713, SJX711, SJX792, SJX791, SJX785.