Apparatus

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sensors Mode-S transponder

899140

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-17005 · ATR-72-600

Hex
899140
Octal
42310500
Decimal
9,015,616
Country
TW
Tail
B-17005
Type
AT76
No current signal · last broadcast 1d ago
Flights observed
9
Distinct callsigns
8
Country
TW
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 899140.

Country allocation

The ICAO 24-bit address 899140 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 8 distinct

Callsign Airline Flights Last seen
UIA8816 - 2 2026-04-14
UIA8901 - 1 2026-04-14
UIA8728 - 1 2026-04-13
UIA8727 - 1 2026-04-13
UIA8726 - 1 2026-04-13
UIA8725 - 1 2026-04-13
UIA8722 - 1 2026-04-13
UIA8721 Uni Air 1 2026-04-13

Recent flights last 9

DateFlightRouteTakeoffLandingDuration
2026-04-14 UIA8816 - Apr 14, 07:10 UTCApr 14, 07:30 UTC20m
2026-04-14 UIA8816 - Apr 14, 06:50 UTCApr 14, 07:10 UTC20m
2026-04-14 UIA8901 - Apr 14, 05:15 UTCApr 14, 05:30 UTC15m
2026-04-13 UIA8728 - Apr 13, 11:20 UTCApr 13, 11:35 UTC15m
2026-04-13 UIA8727 - Apr 13, 09:05 UTCApr 13, 09:20 UTC15m
2026-04-13 UIA8726 - Apr 13, 08:05 UTCApr 13, 08:15 UTC10m
2026-04-13 UIA8725 - Apr 13, 05:35 UTCApr 13, 05:50 UTC15m
2026-04-13 UIA8722 - Apr 13, 04:10 UTCApr 13, 04:20 UTC10m
2026-04-13 UIA8721 TSA → TTT Apr 13, 01:45 UTCApr 13, 02:00 UTC15m

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-17005 page for operator, model, and routing details .

Mode-S 899140 frequently asked

What is Mode-S code 899140?
899140 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-17005.
Where is Mode-S 899140 registered?
Mode-S code 899140 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 899140 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 899140, octal 42310500, decimal 9,015,616.
What flights does 899140 operate?
Mode-S 899140 has broadcast 8 distinct callsigns, including UIA8816, UIA8901, UIA8728, UIA8727, UIA8726.