Apparatus

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sensors Mode-S transponder

8990EA

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-18108 · AIRBUS A-321neo

Hex
8990EA
Octal
42310352
Decimal
9,015,530
Country
TW
Tail
B-18108
Type
A21N
No current signal · last broadcast 2h ago
Flights observed
360
Distinct callsigns
20
Country
TW
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 8990EA.

Country allocation

The ICAO 24-bit address 8990EA 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
CAL107 - 12 2026-07-13
CAL764 China Airlines 11 2026-06-18
CAL189 - 11 2026-07-07
CAL188 - 10 2026-07-07
CAL155 - 10 2026-07-08
CAL151 - 10 2026-07-04
CAL794 - 9 2026-07-13
CAL123 China Airlines 9 2026-06-14
CAL106 - 9 2026-07-12
CAL909 - 8 2026-07-03
CAL851 China Airlines 8 2026-06-21
CAL793 - 8 2026-07-13
CAL763 China Airlines 8 2026-06-18
CAL154 China Airlines 8 2026-07-08
CAL150 - 8 2026-07-03
CAL838 China Airlines 7 2026-06-13
CAL837 China Airlines 7 2026-06-13
CAL755 - 7 2026-06-19
CAL179 China Airlines 7 2026-05-30
CAL122 China Airlines 7 2026-05-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CAL113 HIJ → TPE Jul 14, 03:15 UTCJul 14, 05:25 UTC2h 10m
2026-07-13 CAL112 - Jul 13, 23:25 UTCJul 14, 01:30 UTC2h 5m
2026-07-13 CAL794 - Jul 13, 12:30 UTCJul 13, 13:55 UTC1h 25m
2026-07-13 CAL793 - Jul 13, 06:50 UTCJul 13, 09:15 UTC2h 25m
2026-07-13 CAL107 NRT → TPE Jul 13, 01:15 UTCJul 13, 04:10 UTC2h 55m
2026-07-12 CAL106 TPE → NRT Jul 12, 08:55 UTCJul 12, 12:05 UTC3h 10m
2026-07-11 CAL2157 - Jul 11, 23:20 UTCJul 12, 01:35 UTC2h 15m
2026-07-10 CAL2156 - Jul 10, 08:20 UTCJul 10, 10:40 UTC2h 20m
2026-07-10 CAL157 - Jul 10, 06:30 UTCJul 10, 07:00 UTC30m
2026-07-10 CAL157 - Jul 10, 04:40 UTCJul 10, 05:20 UTC40m
2026-07-10 CAL156 - Jul 10, 00:35 UTCJul 10, 03:00 UTC2h 25m
2026-07-09 CAL109 - Jul 9, 11:30 UTCJul 9, 14:40 UTC3h 10m
2026-07-09 CAL108 - Jul 9, 07:05 UTCJul 9, 09:55 UTC2h 50m
2026-07-09 CAL602 HKG → TPE Jul 9, 02:30 UTCJul 9, 03:50 UTC1h 20m
2026-07-08 CAL601 - Jul 8, 23:35 UTCJul 9, 00:50 UTC1h 15m
2026-07-08 CAL187 PUS → TPE Jul 8, 11:10 UTCJul 8, 13:05 UTC1h 55m
2026-07-08 CAL186 TPE → PUS Jul 8, 08:05 UTCJul 8, 09:50 UTC1h 45m
2026-07-08 CAL155 - Jul 8, 04:05 UTCJul 8, 06:35 UTC2h 30m
2026-07-08 CAL154 TPE → NGO Jul 8, 00:35 UTCJul 8, 02:15 UTC1h 40m
2026-07-07 CAL154 TPE → NGO Jul 7, 23:50 UTCJul 8, 00:05 UTC15m
2026-07-07 CAL916 HKG → TPE Jul 7, 10:15 UTCJul 7, 11:45 UTC1h 30m
2026-07-07 CAL915 TPE → HKG Jul 7, 07:05 UTCJul 7, 08:30 UTC1h 25m
2026-07-07 CAL189 - Jul 7, 04:50 UTCJul 7, 05:20 UTC30m
2026-07-07 CAL189 - Jul 7, 03:25 UTCJul 7, 03:45 UTC20m
2026-07-07 CAL188 - Jul 7, 01:50 UTCJul 7, 02:10 UTC20m
2026-07-07 CAL188 - Jul 7, 00:25 UTCJul 7, 00:55 UTC30m
2026-07-06 CAL794 - Jul 6, 11:15 UTCJul 6, 13:35 UTC2h 20m
2026-07-06 CAL793 - Jul 6, 06:55 UTCJul 6, 09:10 UTC2h 15m
2026-07-06 CAL107 NRT → TPE Jul 6, 00:50 UTCJul 6, 03:50 UTC3h 0m
2026-07-05 CAL106 TPE → NRT Jul 5, 08:35 UTCJul 5, 11:35 UTC3h 0m
2026-07-05 CAL705 TPE → TPE Jul 5, 00:30 UTCJul 5, 06:25 UTC5h 55m
2026-07-04 CAL794 - Jul 4, 11:50 UTCJul 4, 14:25 UTC2h 35m
2026-07-04 CAL793 - Jul 4, 07:05 UTCJul 4, 09:40 UTC2h 35m
2026-07-04 CAL151 - Jul 4, 03:10 UTCJul 4, 03:25 UTC15m
2026-07-04 CAL151 - Jul 4, 01:00 UTCJul 4, 01:45 UTC45m
2026-07-03 CAL150 - Jul 3, 09:35 UTCJul 3, 11:55 UTC2h 20m
2026-07-03 CAL910 - Jul 3, 06:45 UTCJul 3, 08:10 UTC1h 25m
2026-07-03 CAL909 - Jul 3, 04:10 UTCJul 3, 04:50 UTC40m
2026-07-03 CAL909 - Jul 3, 03:10 UTCJul 3, 03:35 UTC25m
2026-07-02 CAL924 - Jul 2, 14:00 UTCJul 2, 15:20 UTC1h 20m
2026-07-02 CAL923 - Jul 2, 12:00 UTCJul 2, 12:20 UTC20m
2026-07-02 CAL923 - Jul 2, 11:00 UTCJul 2, 11:25 UTC25m
2026-07-02 CAL155 - Jul 2, 03:50 UTCJul 2, 06:25 UTC2h 35m
2026-07-01 CAL154 TPE → NGO Jul 1, 23:50 UTCJul 2, 01:55 UTC2h 5m
2026-07-01 CAL794 - Jul 1, 11:10 UTCJul 1, 13:30 UTC2h 20m
2026-07-01 CAL793 - Jul 1, 06:55 UTCJul 1, 09:10 UTC2h 15m
2026-07-01 CAL602 HKG → TPE Jul 1, 02:40 UTCJul 1, 04:00 UTC1h 20m
2026-07-01 CAL601 TPE → HKG Jul 1, 00:45 UTCJul 1, 01:05 UTC20m
2026-06-30 CAL601 TPE → HKG Jun 30, 23:45 UTCJul 1, 00:10 UTC25m
2026-06-30 CAL794 - Jun 30, 11:25 UTCJun 30, 13:50 UTC2h 25m

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-18108 page for operator, model, and routing details .

Mode-S 8990EA frequently asked

What is Mode-S code 8990EA?
8990EA is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-18108.
Where is Mode-S 8990EA registered?
Mode-S code 8990EA is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8990EA broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8990EA, octal 42310352, decimal 9,015,530.
What flights does 8990EA operate?
Mode-S 8990EA has broadcast 20 distinct callsigns, including CAL107, CAL764, CAL189, CAL188, CAL155.