Apparatus

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sensors Mode-S transponder

8990F0

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-18111 · AIRBUS A-321neo

Hex
8990F0
Octal
42310360
Decimal
9,015,536
Country
TW
Tail
B-18111
Type
A21N
No current signal · last broadcast Jul 26, 12:05 UTC
Flights observed
353
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 12:05 UTC

Last known position

Most recent position reported by Mode-S 8990F0.

Country allocation

The ICAO 24-bit address 8990F0 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
CAL179 China Airlines 10 2026-07-22
CAL186 China Airlines 9 2026-07-21
CAL155 China Airlines 9 2026-07-21
CAL154 - 9 2026-07-20
CAL113 - 8 2026-07-10
CAL112 - 8 2026-07-10
CAL107 - 8 2026-07-07
CAL518 - 7 2026-07-14
CAL187 China Airlines 7 2026-07-21
CAL150 China Airlines 7 2026-06-06
CAL109 - 7 2026-06-17
CAL106 - 7 2026-07-06
CAL904 China Airlines 6 2026-07-23
CAL903 China Airlines 6 2026-07-23
CAL851 - 6 2026-07-12
CAL790 - 6 2026-06-28
CAL191 - 6 2026-07-05
CAL189 - 6 2026-07-16
CAL151 China Airlines 6 2026-06-07
CAL027 - 6 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CAL105 NRT → TPE Jul 26, 11:40 UTCJul 26, 12:05 UTC25m
2026-07-26 CAL105 NRT → TPE Jul 26, 09:10 UTCJul 26, 10:30 UTC1h 20m
2026-07-26 CAL104 TPE → NRT Jul 26, 04:25 UTCJul 26, 07:35 UTC3h 11m
2026-07-25 CAL732 PEN → TPE Jul 25, 11:05 UTCJul 25, 12:15 UTC1h 10m
2026-07-25 CAL731 TPE → PEN Jul 25, 06:15 UTCJul 25, 06:30 UTC15m
2026-07-25 CAL731 TPE → PEN Jul 25, 02:20 UTCJul 25, 03:25 UTC1h 5m
2026-07-24 CAL838 BKK → TPE Jul 24, 20:00 UTCJul 24, 23:20 UTC3h 20m
2026-07-24 CAL837 TPE → BKK Jul 24, 14:55 UTCJul 24, 18:15 UTC3h 20m
2026-07-24 CAL131 CTS → TPE Jul 24, 06:35 UTCJul 24, 10:25 UTC3h 50m
2026-07-24 CAL130 TPE → CTS Jul 24, 02:50 UTCJul 24, 04:50 UTC2h 0m
2026-07-24 CAL130 TPE → CTS Jul 24, 01:20 UTCJul 24, 01:35 UTC15m
2026-07-23 CAL916 HKG → TPE Jul 23, 10:10 UTCJul 23, 11:25 UTC1h 15m
2026-07-23 CAL915 TPE → HKG Jul 23, 06:50 UTCJul 23, 08:05 UTC1h 15m
2026-07-23 CAL904 HKG → TPE Jul 23, 03:25 UTCJul 23, 04:50 UTC1h 25m
2026-07-23 CAL903 TPE → HKG Jul 23, 00:20 UTCJul 23, 01:40 UTC1h 20m
2026-07-22 CAL179 TAK → TPE Jul 22, 14:40 UTCJul 22, 14:55 UTC15m
2026-07-22 CAL179 TAK → TPE Jul 22, 12:50 UTCJul 22, 13:35 UTC45m
2026-07-22 MDA992 - Jul 22, 04:45 UTCJul 22, 05:25 UTC40m
2026-07-22 MDA991 - Jul 22, 01:15 UTCJul 22, 02:05 UTC50m
2026-07-21 CAL838 BKK → TPE Jul 21, 20:20 UTCJul 21, 23:40 UTC3h 20m
2026-07-21 CAL837 TPE → BKK Jul 21, 14:50 UTCJul 21, 18:10 UTC3h 20m
2026-07-21 CAL187 PUS → TPE Jul 21, 13:00 UTCJul 21, 13:10 UTC10m
2026-07-21 CAL187 PUS → TPE Jul 21, 11:20 UTCJul 21, 11:45 UTC25m
2026-07-21 CAL186 TPE → PUS Jul 21, 09:45 UTCJul 21, 10:00 UTC15m
2026-07-21 CAL186 TPE → PUS Jul 21, 08:10 UTCJul 21, 08:35 UTC25m
2026-07-21 CAL155 NGO → TPE Jul 21, 04:10 UTCJul 21, 06:45 UTC2h 35m
2026-07-20 CAL154 - Jul 20, 23:50 UTCJul 21, 02:10 UTC2h 20m
2026-07-20 CAL131 CTS → TPE Jul 20, 06:35 UTCJul 20, 10:10 UTC3h 35m
2026-07-20 CAL130 TPE → CTS Jul 20, 00:55 UTCJul 20, 04:20 UTC3h 25m
2026-07-19 CAL756 SIN → TPE Jul 19, 21:35 UTCJul 19, 22:50 UTC1h 15m
2026-07-19 CAL756 SIN → TPE Jul 19, 18:20 UTCJul 19, 18:30 UTC10m
2026-07-19 CAL755 TPE → SIN Jul 19, 16:15 UTCJul 19, 16:30 UTC15m
2026-07-19 CAL755 TPE → SIN Jul 19, 12:30 UTCJul 19, 13:25 UTC55m
2026-07-19 CAL131 CTS → TPE Jul 19, 10:10 UTCJul 19, 10:40 UTC30m
2026-07-19 CAL131 CTS → TPE Jul 19, 06:50 UTCJul 19, 09:00 UTC2h 10m
2026-07-19 CAL130 TPE → CTS Jul 19, 01:10 UTCJul 19, 04:40 UTC3h 30m
2026-07-18 CAL155 NGO → TPE Jul 18, 05:50 UTCJul 18, 06:10 UTC20m
2026-07-18 CAL155 NGO → TPE Jul 18, 03:55 UTCJul 18, 04:40 UTC45m
2026-07-18 CAL154 - Jul 18, 01:25 UTCJul 18, 02:09 UTC45m
2026-07-17 CAL154 - Jul 17, 23:50 UTCJul 18, 00:00 UTC10m
2026-07-17 CAL123 - Jul 17, 13:00 UTCJul 17, 13:15 UTC15m
2026-07-17 CAL122 - Jul 17, 09:15 UTCJul 17, 09:35 UTC20m
2026-07-16 CAL511 - Jul 16, 23:55 UTCJul 17, 07:05 UTC7h 10m
2026-07-16 CAL129 - Jul 16, 12:34 UTCJul 16, 13:00 UTC25m
2026-07-16 CAL129 - Jul 16, 10:59 UTCJul 16, 11:15 UTC15m
2026-07-16 CAL128 - Jul 16, 08:55 UTCJul 16, 09:40 UTC45m
2026-07-16 CAL128 - Jul 16, 07:30 UTCJul 16, 07:45 UTC15m
2026-07-16 CAL189 - Jul 16, 05:10 UTCJul 16, 05:25 UTC15m
2026-07-16 CAL189 - Jul 16, 03:35 UTCJul 16, 03:55 UTC20m
2026-07-16 CAL188 - Jul 16, 01:50 UTCJul 16, 02:15 UTC25m

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-18111 page for operator, model, and routing details .

Mode-S 8990F0 frequently asked

What is Mode-S code 8990F0?
8990F0 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-18111.
Where is Mode-S 8990F0 registered?
Mode-S code 8990F0 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8990F0 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 12:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8990F0, octal 42310360, decimal 9,015,536.
What flights does 8990F0 operate?
Mode-S 8990F0 has broadcast 20 distinct callsigns, including CAL179, CAL186, CAL155, CAL154, CAL113.