Apparatus

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sensors Mode-S transponder

8990B4

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-16218 · AIRBUS A-321

Hex
8990B4
Octal
42310264
Decimal
9,015,476
Country
TW
Tail
B-16218
Type
A321
No current signal · last broadcast 57m ago
Flights observed
348
Distinct callsigns
20
Country
TW
Last broadcast
57m ago

Last known position

Most recent position reported by Mode-S 8990B4.

Country allocation

The ICAO 24-bit address 8990B4 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
EVA258 EVA Air 16 2026-06-08
EVA121 - 15 2026-06-14
EVA122 - 12 2026-06-14
EVA120 - 12 2026-07-12
EVA165 EVA Air 11 2026-05-20
EVA119 - 11 2026-07-12
EVA846 - 10 2026-07-12
EVA118 - 10 2026-06-16
EVA845 - 9 2026-07-14
EVA385 EVA Air 8 2026-06-04
EVA257 EVA Air 8 2026-06-08
EVA157 EVA Air 8 2026-05-28
EVA117 - 8 2026-06-16
EVA101 EVA Air 8 2026-05-28
EVA869 EVA Air 7 2026-06-09
EVA849 - 7 2026-07-13
EVA386 EVA Air 7 2026-06-04
EVA186 EVA Air 7 2026-05-21
EVA166 EVA Air 7 2026-05-19
EVA850 - 6 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 EVA845 KHH → HKG Jul 14, 01:15 UTCJul 14, 02:25 UTC1h 10m
2026-07-13 EVA850 - Jul 13, 12:20 UTCJul 13, 13:20 UTC1h 0m
2026-07-13 EVA849 KHH → HKG Jul 13, 09:50 UTCJul 13, 11:00 UTC1h 10m
2026-07-13 UIA8918 - Jul 13, 07:01 UTCJul 13, 07:30 UTC30m
2026-07-13 UIA9215 - Jul 13, 05:20 UTCJul 13, 05:40 UTC20m
2026-07-13 UIA9216 - Jul 13, 03:40 UTCJul 13, 04:00 UTC20m
2026-07-13 UIA8917 - Jul 13, 01:20 UTCJul 13, 01:40 UTC20m
2026-07-12 EVA119 - Jul 12, 12:45 UTCJul 12, 13:30 UTC45m
2026-07-12 EVA119 - Jul 12, 11:30 UTCJul 12, 11:50 UTC20m
2026-07-12 EVA120 - Jul 12, 09:20 UTCJul 12, 09:40 UTC20m
2026-07-12 EVA120 - Jul 12, 07:40 UTCJul 12, 08:25 UTC45m
2026-07-12 EVA846 HKG → KHH Jul 12, 04:15 UTCJul 12, 05:25 UTC1h 10m
2026-07-12 EVA845 - Jul 12, 01:25 UTCJul 12, 02:25 UTC1h 0m
2026-07-10 EVA846 HKG → KHH Jul 10, 04:20 UTCJul 10, 05:25 UTC1h 5m
2026-07-10 EVA845 KHH → HKG Jul 10, 01:30 UTCJul 10, 02:40 UTC1h 10m
2026-07-09 EVA850 HKG → KHH Jul 9, 11:55 UTCJul 9, 12:55 UTC1h 0m
2026-07-09 EVA849 KHH → HKG Jul 9, 09:00 UTCJul 9, 10:05 UTC1h 5m
2026-07-09 UIA8918 - Jul 9, 06:30 UTCJul 9, 07:00 UTC30m
2026-07-09 UIA9215 - Jul 9, 04:50 UTCJul 9, 05:05 UTC15m
2026-07-09 UIA9216 - Jul 9, 03:15 UTCJul 9, 03:30 UTC15m
2026-07-09 UIA8917 - Jul 9, 01:20 UTCJul 9, 01:45 UTC25m
2026-07-08 EVA147 KIX → KHH Jul 8, 11:40 UTCJul 8, 14:20 UTC2h 40m
2026-07-08 EVA148 KHH → KIX Jul 8, 07:35 UTCJul 8, 10:15 UTC2h 40m
2026-07-08 EVA846 HKG → KHH Jul 8, 04:15 UTCJul 8, 05:25 UTC1h 10m
2026-07-08 EVA845 KHH → HKG Jul 8, 01:20 UTCJul 8, 02:30 UTC1h 10m
2026-07-07 EVA119 - Jul 7, 11:35 UTCJul 7, 13:40 UTC2h 5m
2026-07-07 EVA120 - Jul 7, 07:35 UTCJul 7, 09:35 UTC2h 0m
2026-07-07 EVA181 KIX → KHH Jul 7, 03:20 UTCJul 7, 06:05 UTC2h 45m
2026-07-06 EVA182 KHH → KIX Jul 6, 23:05 UTCJul 7, 01:40 UTC2h 35m
2026-07-06 EVA119 - Jul 6, 11:30 UTCJul 6, 13:35 UTC2h 5m
2026-07-06 EVA120 - Jul 6, 09:20 UTCJul 6, 09:30 UTC10m
2026-07-06 EVA120 - Jul 6, 07:25 UTCJul 6, 08:35 UTC1h 10m
2026-07-06 EVA846 HKG → KHH Jul 6, 04:05 UTCJul 6, 05:10 UTC1h 5m
2026-07-06 EVA845 - Jul 6, 01:20 UTCJul 6, 02:20 UTC1h 0m
2026-07-05 EVA850 HKG → KHH Jul 5, 11:45 UTCJul 5, 12:50 UTC1h 5m
2026-07-05 EVA849 - Jul 5, 09:10 UTCJul 5, 10:10 UTC1h 0m
2026-07-05 UIA8918 - Jul 5, 06:35 UTCJul 5, 07:00 UTC25m
2026-07-05 UIA9215 - Jul 5, 04:50 UTCJul 5, 05:05 UTC15m
2026-07-05 UIA9216 - Jul 5, 03:20 UTCJul 5, 03:30 UTC10m
2026-07-05 UIA8917 - Jul 5, 01:25 UTCJul 5, 01:45 UTC20m
2026-07-04 EVA850 HKG → KHH Jul 4, 12:55 UTCJul 4, 14:00 UTC1h 5m
2026-07-04 EVA849 - Jul 4, 11:00 UTCJul 4, 11:15 UTC15m
2026-07-04 EVA849 - Jul 4, 09:55 UTCJul 4, 10:15 UTC20m
2026-07-04 EVA181 KIX → KHH Jul 4, 03:35 UTCJul 4, 06:15 UTC2h 40m
2026-07-03 EVA182 KHH → KIX Jul 3, 23:10 UTCJul 4, 01:40 UTC2h 30m
2026-07-03 EVA850 - Jul 3, 13:45 UTCJul 3, 14:45 UTC1h 0m
2026-07-03 EVA849 KHH → HKG Jul 3, 10:45 UTCJul 3, 12:00 UTC1h 15m
2026-07-03 UIA8918 - Jul 3, 06:45 UTCJul 3, 07:10 UTC25m
2026-07-03 UIA9215 - Jul 3, 04:50 UTCJul 3, 05:10 UTC20m
2026-07-03 UIA9216 - Jul 3, 03:15 UTCJul 3, 03:35 UTC20m

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-16218 page for operator, model, and routing details .

Mode-S 8990B4 frequently asked

What is Mode-S code 8990B4?
8990B4 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-16218.
Where is Mode-S 8990B4 registered?
Mode-S code 8990B4 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8990B4 broadcasting right now?
No active broadcast right now. Last signal was 57m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8990B4, octal 42310264, decimal 9,015,476.
What flights does 8990B4 operate?
Mode-S 8990B4 has broadcast 20 distinct callsigns, including EVA258, EVA121, EVA122, EVA120, EVA165.