Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

89916D

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-18916 · AIRBUS A-350-900

Hex
89916D
Octal
42310555
Decimal
9,015,661
Country
TW
Tail
B-18916
Type
A359
No current signal · last broadcast 1d ago
Flights observed
7
Distinct callsigns
2
Country
TW
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 89916D.

Country allocation

The ICAO 24-bit address 89916D 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 2 distinct

Callsign Airline Flights Last seen
CAL021 - 5 2026-04-13
CAL022 China Airlines 2 2026-04-13

Recent flights last 7

DateFlightRouteTakeoffLandingDuration
2026-04-13 CAL021 - Apr 13, 20:30 UTCApr 13, 20:50 UTC20m
2026-04-13 CAL021 - Apr 13, 17:30 UTCApr 13, 18:50 UTC1h 20m
2026-04-13 CAL021 - Apr 13, 12:20 UTCApr 13, 12:55 UTC35m
2026-04-13 CAL021 - Apr 13, 11:55 UTCApr 13, 12:55 UTC1h 0m
2026-04-13 CAL021 - Apr 13, 08:20 UTCApr 13, 12:15 UTC3h 55m
2026-04-13 CAL022 TPE → SEA Apr 13, 01:35 UTCApr 13, 02:20 UTC45m
2026-04-12 CAL022 TPE → SEA Apr 12, 18:05 UTCApr 12, 18:50 UTC45m

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-18916 page for operator, model, and routing details .

Mode-S 89916D frequently asked

What is Mode-S code 89916D?
89916D is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-18916.
Where is Mode-S 89916D registered?
Mode-S code 89916D is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 89916D 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 89916D, octal 42310555, decimal 9,015,661.
What flights does 89916D operate?
Mode-S 89916D has broadcast 2 distinct callsigns, including CAL021, CAL022.