Apparatus

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sensors Mode-S transponder

8990E4

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-16722 · BOEING 777-300ER

Hex
8990E4
Octal
42310344
Decimal
9,015,524
Country
TW
Tail
B-16722
Type
B77W
No current signal · last broadcast 16h ago
Flights observed
11
Distinct callsigns
4
Country
TW
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S 8990E4.

Country allocation

The ICAO 24-bit address 8990E4 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 4 distinct

Callsign Airline Flights Last seen
EVA052 EVA Air 5 2026-04-13
EVA051 EVA Air 3 2026-04-14
EVA225 EVA Air 2 2026-04-13
EVA226 - 1 2026-04-13

Recent flights last 11

DateFlightRouteTakeoffLandingDuration
2026-04-14 EVA051 IAH → TPE Apr 14, 09:20 UTCApr 14, 10:45 UTC1h 25m
2026-04-14 EVA051 IAH → TPE Apr 14, 07:10 UTCApr 14, 08:35 UTC1h 25m
2026-04-14 EVA051 IAH → TPE Apr 14, 06:45 UTCApr 14, 07:10 UTC25m
2026-04-13 EVA052 TPE → IAH Apr 13, 23:05 UTCApr 13, 23:40 UTC35m
2026-04-13 EVA052 TPE → IAH Apr 13, 16:15 UTCApr 13, 16:30 UTC15m
2026-04-13 EVA052 TPE → IAH Apr 13, 15:50 UTCApr 13, 16:30 UTC40m
2026-04-13 EVA052 TPE → IAH Apr 13, 15:40 UTCApr 13, 16:15 UTC35m
2026-04-13 EVA052 TPE → IAH Apr 13, 13:50 UTCApr 13, 14:00 UTC10m
2026-04-13 EVA226 - Apr 13, 08:30 UTCApr 13, 09:55 UTC1h 25m
2026-04-13 EVA225 TPE → SIN Apr 13, 00:20 UTCApr 13, 00:50 UTC30m
2026-04-12 EVA225 - Apr 12, 23:55 UTCApr 13, 00:50 UTC55m

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-16722 page for operator, model, and routing details .

Mode-S 8990E4 frequently asked

What is Mode-S code 8990E4?
8990E4 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-16722.
Where is Mode-S 8990E4 registered?
Mode-S code 8990E4 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8990E4 broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8990E4, octal 42310344, decimal 9,015,524.
What flights does 8990E4 operate?
Mode-S 8990E4 has broadcast 4 distinct callsigns, including EVA052, EVA051, EVA225, EVA226.