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 Jul 26, 23:00 UTC
Flights observed
409
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 23:00 UTC

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 17 2026-07-20
EVA121 EVA Air 17 2026-07-19
EVA165 EVA Air 13 2026-07-18
EVA122 EVA Air 13 2026-07-19
EVA846 - 12 2026-07-15
EVA120 - 12 2026-07-12
EVA157 EVA Air 11 2026-07-26
EVA119 - 11 2026-07-12
EVA101 EVA Air 11 2026-07-26
EVA845 - 10 2026-07-15
EVA385 EVA Air 10 2026-07-24
EVA158 EVA Air 10 2026-07-25
EVA118 - 10 2026-06-16
EVA849 - 9 2026-07-16
EVA386 EVA Air 9 2026-07-24
EVA257 EVA Air 9 2026-07-20
EVA166 EVA Air 9 2026-07-18
EVA102 EVA Air 9 2026-07-26
EVA869 EVA Air 8 2026-07-25
EVA117 - 8 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EVA134 TPE → UKB Jul 26, 22:30 UTCJul 26, 23:00 UTC30m
2026-07-26 EVA101 FUK → TPE Jul 26, 10:50 UTCJul 26, 12:40 UTC1h 50m
2026-07-26 EVA102 TPE → FUK Jul 26, 08:50 UTCJul 26, 09:05 UTC15m
2026-07-26 EVA102 TPE → FUK Jul 26, 07:30 UTCJul 26, 07:50 UTC20m
2026-07-26 EVA157 KMQ → TPE Jul 26, 02:55 UTCJul 26, 05:30 UTC2h 35m
2026-07-25 EVA158 TPE → KMQ Jul 25, 23:40 UTCJul 26, 01:25 UTC1h 45m
2026-07-25 EVA158 TPE → KMQ Jul 25, 22:55 UTCJul 25, 23:10 UTC15m
2026-07-25 EVA870 HKG → TPE Jul 25, 07:55 UTCJul 25, 09:25 UTC1h 30m
2026-07-25 EVA869 TPE → HKG Jul 25, 04:45 UTCJul 25, 06:00 UTC1h 15m
2026-07-25 EVA113 OKA → TPE Jul 25, 02:05 UTCJul 25, 02:25 UTC20m
2026-07-24 EVA112 TPE → OKA Jul 24, 23:05 UTCJul 24, 23:30 UTC25m
2026-07-24 EVA386 HAN → TPE Jul 24, 13:15 UTCJul 24, 15:30 UTC2h 15m
2026-07-24 EVA386 HAN → TPE Jul 24, 12:15 UTCJul 24, 12:30 UTC15m
2026-07-24 EVA385 TPE → HAN Jul 24, 09:30 UTCJul 24, 09:50 UTC20m
2026-07-24 EVA385 TPE → HAN Jul 24, 07:15 UTCJul 24, 08:30 UTC1h 15m
2026-07-24 EVA852 HKG → TPE Jul 24, 03:30 UTCJul 24, 04:45 UTC1h 15m
2026-07-24 EVA851 TPE → HKG Jul 24, 00:50 UTCJul 24, 02:05 UTC1h 15m
2026-07-22 EVA806 - Jul 22, 12:20 UTCJul 22, 13:55 UTC1h 35m
2026-07-22 EVA1193 PUS → TPE Jul 22, 04:10 UTCJul 22, 04:35 UTC25m
2026-07-22 EVA1194 TPE → PUS Jul 22, 02:15 UTCJul 22, 02:30 UTC15m
2026-07-22 EVA1194 TPE → PUS Jul 22, 00:45 UTCJul 22, 01:10 UTC25m
2026-07-21 EVA101 FUK → TPE Jul 21, 12:35 UTCJul 21, 12:45 UTC10m
2026-07-21 EVA101 FUK → TPE Jul 21, 10:55 UTCJul 21, 11:20 UTC25m
2026-07-21 EVA102 TPE → FUK Jul 21, 09:10 UTCJul 21, 09:40 UTC30m
2026-07-21 EVA102 TPE → FUK Jul 21, 07:40 UTCJul 21, 08:00 UTC20m
2026-07-21 EVA157 KMQ → TPE Jul 21, 05:45 UTCJul 21, 06:00 UTC15m
2026-07-21 EVA157 KMQ → TPE Jul 21, 03:20 UTCJul 21, 04:25 UTC1h 5m
2026-07-21 EVA158 TPE → KMQ Jul 21, 00:20 UTCJul 21, 01:10 UTC50m
2026-07-20 EVA158 TPE → KMQ Jul 20, 22:45 UTCJul 20, 23:00 UTC15m
2026-07-20 EVA810 HKG → TPE Jul 20, 14:15 UTCJul 20, 15:35 UTC1h 20m
2026-07-20 EVA809 TPE → HKG Jul 20, 11:20 UTCJul 20, 12:35 UTC1h 15m
2026-07-20 EVA258 CNX → TPE Jul 20, 04:55 UTCJul 20, 08:20 UTC3h 25m
2026-07-20 EVA257 TPE → CNX Jul 20, 00:05 UTCJul 20, 03:15 UTC3h 10m
2026-07-19 EVA121 AOJ → TPE Jul 19, 12:45 UTCJul 19, 13:10 UTC25m
2026-07-19 EVA121 AOJ → TPE Jul 19, 10:20 UTCJul 19, 11:50 UTC1h 30m
2026-07-19 EVA122 TPE → AOJ Jul 19, 02:10 UTCJul 19, 05:25 UTC3h 15m
2026-07-18 EVA165 CTS → TPE Jul 18, 07:35 UTCJul 18, 07:55 UTC20m
2026-07-18 EVA165 CTS → TPE Jul 18, 04:20 UTCJul 18, 06:25 UTC2h 5m
2026-07-18 EVA166 TPE → CTS Jul 18, 00:35 UTCJul 18, 02:45 UTC2h 10m
2026-07-17 EVA166 TPE → CTS Jul 17, 23:14 UTCJul 17, 23:30 UTC15m
2026-07-17 EVA3218 - Jul 17, 14:04 UTCJul 17, 15:10 UTC1h 5m
2026-07-17 UIA8716 - Jul 17, 12:30 UTCJul 17, 12:50 UTC20m
2026-07-17 UIA8715 - Jul 17, 11:10 UTCJul 17, 11:30 UTC20m
2026-07-17 UIA8922 - Jul 17, 09:25 UTCJul 17, 09:50 UTC25m
2026-07-17 UIA8921 - Jul 17, 07:40 UTCJul 17, 08:00 UTC20m
2026-07-17 EVA145 ICN → KHH Jul 17, 03:30 UTCJul 17, 05:50 UTC2h 20m
2026-07-16 EVA146 KHH → ICN Jul 16, 23:15 UTCJul 17, 01:45 UTC2h 30m
2026-07-16 EVA850 HKG → KHH Jul 16, 11:45 UTCJul 16, 12:49 UTC1h 5m
2026-07-16 EVA849 - Jul 16, 09:45 UTCJul 16, 09:55 UTC10m
2026-07-16 EVA849 - Jul 16, 08:45 UTCJul 16, 09:15 UTC30m

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 Jul 26, 23:00 UTC.
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, EVA165, EVA122, EVA846.