Apparatus

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sensors Mode-S transponder

8990E9

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-18107 · AIRBUS A-321neo

Hex
8990E9
Octal
42310351
Decimal
9,015,529
Country
TW
Tail
B-18107
Type
A21N
No current signal · last broadcast Jul 26, 13:05 UTC
Flights observed
418
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 13:05 UTC

Last known position

Most recent position reported by Mode-S 8990E9.

Country allocation

The ICAO 24-bit address 8990E9 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
CAL909 - 19 2026-07-02
CAL852 China Airlines 14 2026-07-22
CAL910 - 13 2026-07-02
CAL837 - 13 2026-07-20
CAL151 - 13 2026-07-08
CAL123 - 13 2026-07-20
CAL851 - 12 2026-07-21
CAL838 China Airlines 12 2026-07-20
CAL794 - 12 2026-07-17
CAL107 - 12 2026-06-23
CAL106 - 12 2026-06-22
CAL756 China Airlines 10 2026-07-22
CAL755 China Airlines 10 2026-07-22
CAL122 China Airlines 10 2026-07-20
CAL150 - 9 2026-07-07
MDA991 - 7 2026-07-21
CAL793 - 6 2026-07-17
CAL512 - 6 2026-06-24
CAL189 - 6 2026-06-21
CAL179 China Airlines 6 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CAL179 TAK → TPE Jul 26, 10:35 UTCJul 26, 13:05 UTC2h 30m
2026-07-26 CAL178 TPE → TAK Jul 26, 07:00 UTCJul 26, 09:15 UTC2h 15m
2026-07-24 CAL862 PNH → TPE Jul 24, 23:35 UTCJul 25, 07:35 UTC8h 0m
2026-07-24 CAL105 NRT → TPE Jul 24, 12:20 UTCJul 24, 13:10 UTC50m
2026-07-24 CAL105 NRT → TPE Jul 24, 09:40 UTCJul 24, 11:00 UTC1h 20m
2026-07-24 CAL104 TPE → NRT Jul 24, 06:20 UTCJul 24, 07:35 UTC1h 15m
2026-07-24 CAL104 TPE → NRT Jul 24, 04:40 UTCJul 24, 04:55 UTC15m
2026-07-23 CAL732 PEN → TPE Jul 23, 10:50 UTCJul 23, 11:55 UTC1h 5m
2026-07-23 CAL732 PEN → TPE Jul 23, 07:40 UTCJul 23, 07:50 UTC10m
2026-07-23 CAL731 TPE → PEN Jul 23, 05:50 UTCJul 23, 06:00 UTC10m
2026-07-23 CAL731 TPE → PEN Jul 23, 02:00 UTCJul 23, 03:00 UTC1h 0m
2026-07-22 CAL756 SIN → TPE Jul 22, 18:15 UTCJul 22, 22:45 UTC4h 30m
2026-07-22 CAL755 TPE → SIN Jul 22, 12:20 UTCJul 22, 16:15 UTC3h 55m
2026-07-22 CAL852 CNX → TPE Jul 22, 04:35 UTCJul 22, 05:25 UTC50m
2026-07-21 CAL851 - Jul 21, 23:55 UTCJul 22, 03:10 UTC3h 15m
2026-07-21 CAL518 PEK → TPE Jul 21, 15:20 UTCJul 21, 15:35 UTC15m
2026-07-21 CAL517 - Jul 21, 07:55 UTCJul 21, 08:30 UTC35m
2026-07-21 MDA991 TPE → TPE Jul 21, 01:25 UTCJul 21, 05:45 UTC4h 20m
2026-07-20 CAL838 BKK → TPE Jul 20, 20:05 UTCJul 20, 23:20 UTC3h 15m
2026-07-20 CAL837 TPE → BKK Jul 20, 14:55 UTCJul 20, 18:10 UTC3h 15m
2026-07-20 CAL123 - Jul 20, 12:20 UTCJul 20, 13:25 UTC1h 5m
2026-07-20 CAL122 TPE → OKA Jul 20, 10:20 UTCJul 20, 10:35 UTC15m
2026-07-20 CAL122 TPE → OKA Jul 20, 09:20 UTCJul 20, 09:45 UTC25m
2026-07-20 CAL852 CNX → TPE Jul 20, 04:25 UTCJul 20, 07:50 UTC3h 25m
2026-07-19 CAL851 - Jul 19, 23:40 UTCJul 20, 02:55 UTC3h 15m
2026-07-19 CAL109 NRT → TPE Jul 19, 11:55 UTCJul 19, 14:50 UTC2h 55m
2026-07-19 CAL108 TPE → NRT Jul 19, 07:15 UTCJul 19, 10:10 UTC2h 55m
2026-07-19 MDA991 TPE → TPE Jul 19, 01:20 UTCJul 19, 05:35 UTC4h 15m
2026-07-18 CAL838 - Jul 18, 22:35 UTCJul 18, 23:50 UTC1h 15m
2026-07-18 CAL838 - Jul 18, 20:20 UTCJul 18, 20:30 UTC10m
2026-07-18 CAL837 - Jul 18, 17:55 UTCJul 18, 18:10 UTC15m
2026-07-18 CAL837 - Jul 18, 15:10 UTCJul 18, 15:55 UTC45m
2026-07-18 CAL123 - Jul 18, 13:20 UTCJul 18, 13:35 UTC15m
2026-07-18 CAL122 - Jul 18, 10:10 UTCJul 18, 10:20 UTC10m
2026-07-18 CAL122 - Jul 18, 09:15 UTCJul 18, 09:30 UTC15m
2026-07-17 CAL862 - Jul 17, 23:39 UTCJul 18, 07:30 UTC7h 51m
2026-07-17 CAL794 - Jul 17, 12:25 UTCJul 17, 14:00 UTC1h 35m
2026-07-17 CAL794 - Jul 17, 11:30 UTCJul 17, 11:39 UTC10m
2026-07-17 CAL793 - Jul 17, 07:14 UTCJul 17, 08:10 UTC55m
2026-07-17 CAL279 TAK → TPE Jul 17, 04:49 UTCJul 17, 05:20 UTC30m
2026-07-17 CAL279 TAK → TPE Jul 17, 03:10 UTCJul 17, 03:45 UTC35m
2026-07-16 CAL278 TPE → TAK Jul 16, 23:25 UTCJul 17, 01:39 UTC2h 15m
2026-07-16 CAL794 - Jul 16, 12:09 UTCJul 16, 13:45 UTC1h 35m
2026-07-16 CAL794 - Jul 16, 11:10 UTCJul 16, 11:20 UTC10m
2026-07-16 CAL793 - Jul 16, 09:20 UTCJul 16, 09:30 UTC10m
2026-07-16 CAL793 - Jul 16, 07:20 UTCJul 16, 08:30 UTC1h 10m
2026-07-16 CAL119 - Jul 16, 05:25 UTCJul 16, 05:35 UTC10m
2026-07-16 CAL118 - Jul 16, 00:25 UTCJul 16, 00:50 UTC25m
2026-07-15 CAL756 - Jul 15, 21:30 UTCJul 15, 22:45 UTC1h 15m
2026-07-15 CAL756 - Jul 15, 18:20 UTCJul 15, 18:30 UTC10m

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-18107 page for operator, model, and routing details .

Mode-S 8990E9 frequently asked

What is Mode-S code 8990E9?
8990E9 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-18107.
Where is Mode-S 8990E9 registered?
Mode-S code 8990E9 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8990E9 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 13:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8990E9, octal 42310351, decimal 9,015,529.
What flights does 8990E9 operate?
Mode-S 8990E9 has broadcast 20 distinct callsigns, including CAL909, CAL852, CAL910, CAL837, CAL151.