Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 17h ago
Flights observed
161
Distinct callsigns
20
Country
TW
Last broadcast
17h 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
EVA165 EVA Air 11 2026-05-20
EVA121 EVA Air 10 2026-05-16
EVA258 EVA Air 8 2026-05-29
EVA157 EVA Air 8 2026-05-28
EVA122 EVA Air 8 2026-05-16
EVA101 EVA Air 8 2026-05-28
EVA385 EVA Air 7 2026-05-18
EVA186 EVA Air 7 2026-05-21
EVA166 EVA Air 7 2026-05-19
EVA386 EVA Air 6 2026-04-17
EVA158 EVA Air 6 2026-05-28
EVA113 EVA Air 6 2026-05-22
EVA112 EVA Air 6 2026-05-21
EVA869 EVA Air 5 2026-05-26
EVA851 EVA Air 5 2026-05-11
EVA185 EVA Air 5 2026-05-17
EVA102 EVA Air 5 2026-05-28
EVA852 EVA Air 4 2026-05-12
EVA809 EVA Air 4 2026-04-30
EVA257 EVA Air 4 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 EVA258 CNX → TPE May 29, 07:55 UTCMay 29, 08:20 UTC25m
2026-05-29 EVA258 CNX → TPE May 29, 04:50 UTCMay 29, 07:15 UTC2h 25m
2026-05-29 EVA257 TPE → CNX May 29, 00:00 UTCMay 29, 03:15 UTC3h 15m
2026-05-28 EVA101 FUK → TPE May 28, 12:20 UTCMay 28, 12:40 UTC20m
2026-05-28 EVA102 TPE → FUK May 28, 07:40 UTCMay 28, 07:55 UTC15m
2026-05-28 EVA157 KMQ → TPE May 28, 05:35 UTCMay 28, 06:05 UTC30m
2026-05-28 EVA157 KMQ → TPE May 28, 03:20 UTCMay 28, 04:10 UTC50m
2026-05-28 EVA158 TPE → KMQ May 28, 00:35 UTCMay 28, 01:25 UTC50m
2026-05-27 EVA158 TPE → KMQ May 27, 22:55 UTCMay 27, 23:15 UTC20m
2026-05-26 EVA870 HKG → TPE May 26, 08:04 UTCMay 26, 09:35 UTC1h 30m
2026-05-26 EVA869 TPE → HKG May 26, 05:54 UTCMay 26, 06:14 UTC20m
2026-05-26 EVA869 TPE → HKG May 26, 04:54 UTCMay 26, 05:20 UTC25m
2026-05-25 EVA101 FUK → TPE May 25, 12:45 UTCMay 25, 13:20 UTC35m
2026-05-25 EVA102 TPE → FUK May 25, 07:50 UTCMay 25, 08:10 UTC20m
2026-05-25 EVA157 KMQ → TPE May 25, 05:30 UTCMay 25, 05:55 UTC25m
2026-05-25 EVA157 KMQ → TPE May 25, 03:15 UTCMay 25, 04:05 UTC50m
2026-05-24 EVA158 TPE → KMQ May 24, 23:15 UTCMay 24, 23:35 UTC20m
2026-05-24 EVA870 HKG → TPE May 24, 07:40 UTCMay 24, 09:25 UTC1h 45m
2026-05-24 EVA869 TPE → HKG May 24, 05:55 UTCMay 24, 06:10 UTC15m
2026-05-24 EVA869 TPE → HKG May 24, 04:55 UTCMay 24, 05:25 UTC30m
2026-05-23 EVA101 FUK → TPE May 23, 12:35 UTCMay 23, 13:00 UTC25m
2026-05-23 EVA101 FUK → TPE May 23, 11:10 UTCMay 23, 11:20 UTC10m
2026-05-23 EVA102 TPE → FUK May 23, 08:00 UTCMay 23, 08:15 UTC15m
2026-05-23 EVA157 KMQ → TPE May 23, 05:40 UTCMay 23, 06:05 UTC25m
2026-05-23 EVA157 KMQ → TPE May 23, 03:30 UTCMay 23, 04:25 UTC55m
2026-05-22 EVA158 TPE → KMQ May 22, 22:55 UTCMay 23, 01:05 UTC2h 10m
2026-05-22 EVA870 HKG → TPE May 22, 07:50 UTCMay 22, 09:15 UTC1h 25m
2026-05-22 EVA869 TPE → HKG May 22, 05:05 UTCMay 22, 06:20 UTC1h 15m
2026-05-22 EVA113 OKA → TPE May 22, 02:25 UTCMay 22, 02:50 UTC25m
2026-05-21 EVA112 TPE → OKA May 21, 23:05 UTCMay 21, 23:25 UTC20m
2026-05-21 EVA186 TPE → OKA May 21, 08:45 UTCMay 21, 12:55 UTC4h 10m
2026-05-21 EVA113 OKA → TPE May 21, 02:15 UTCMay 21, 02:35 UTC20m
2026-05-20 EVA112 TPE → OKA May 20, 23:55 UTCMay 21, 00:10 UTC15m
2026-05-20 EVA112 TPE → OKA May 20, 23:00 UTCMay 20, 23:20 UTC20m
2026-05-20 EVA165 CTS → TPE May 20, 07:25 UTCMay 20, 07:50 UTC25m
2026-05-20 EVA165 CTS → TPE May 20, 04:00 UTCMay 20, 06:55 UTC2h 56m
2026-05-19 EVA166 TPE → CTS May 19, 23:20 UTCMay 20, 02:50 UTC3h 30m
2026-05-18 EVA385 TPE → HAN May 18, 06:50 UTCMay 18, 13:30 UTC6h 40m
2026-05-18 EVA133 UKB → TPE May 18, 02:30 UTCMay 18, 04:45 UTC2h 15m
2026-05-17 EVA134 TPE → UKB May 17, 22:40 UTCMay 18, 01:05 UTC2h 25m
2026-05-17 EVA185 OKA → TPE May 17, 11:10 UTCMay 17, 12:15 UTC1h 5m
2026-05-17 EVA186 TPE → OKA May 17, 08:40 UTCMay 17, 09:05 UTC25m
2026-05-17 EVA157 KMQ → TPE May 17, 05:25 UTCMay 17, 05:50 UTC25m
2026-05-17 EVA157 KMQ → TPE May 17, 03:25 UTCMay 17, 04:10 UTC45m
2026-05-17 EVA158 TPE → KMQ May 17, 00:35 UTCMay 17, 01:20 UTC45m
2026-05-16 EVA158 TPE → KMQ May 16, 22:55 UTCMay 16, 23:10 UTC15m
2026-05-16 EVA121 AOJ → TPE May 16, 07:31 UTCMay 16, 10:25 UTC2h 55m
2026-05-16 EVA122 TPE → AOJ May 16, 02:15 UTCMay 16, 05:40 UTC3h 25m
2026-05-15 EVA868 HKG → TPE May 15, 09:25 UTCMay 15, 10:10 UTC45m
2026-05-15 EVA868 HKG → TPE May 15, 08:35 UTCMay 15, 08:50 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-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 17h 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 EVA165, EVA121, EVA258, EVA157, EVA122.