Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

8990A8

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B18112 · AIRBUS A-321neo

Hex
8990A8
Octal
42310250
Decimal
9,015,464
Country
TW
Tail
B18112
Type
A21N
No current signal · last broadcast Jul 26, 14:50 UTC
Flights observed
396
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 14:50 UTC

Last known position

Most recent position reported by Mode-S 8990A8.

Country allocation

The ICAO 24-bit address 8990A8 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
CAL935 China Airlines 25 2026-07-26
CAL103 China Airlines 25 2026-07-26
CAL102 China Airlines 25 2026-07-25
CAL936 China Airlines 23 2026-07-26
CAL127 China Airlines 14 2026-07-25
CAL126 China Airlines 14 2026-07-25
CAL934 - 9 2026-07-19
CAL933 China Airlines 9 2026-07-18
CAL915 - 8 2026-06-15
CAL512 China Airlines 8 2026-06-08
CAL129 China Airlines 8 2026-06-14
CAL903 China Airlines 7 2026-06-06
CAL852 China Airlines 7 2026-06-07
CAL851 China Airlines 6 2026-06-06
CAL601 China Airlines 6 2026-06-14
CAL189 - 6 2026-06-14
CAL128 China Airlines 6 2026-06-14
CAL916 - 5 2026-06-15
CAL756 China Airlines 5 2026-06-10
CAL602 - 5 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CAL936 HKG → KHH Jul 26, 13:40 UTCJul 26, 14:45 UTC1h 5m
2026-07-26 CAL935 KHH → HKG Jul 26, 10:05 UTCJul 26, 11:15 UTC1h 10m
2026-07-26 CAL103 NRT → KHH Jul 26, 05:00 UTCJul 26, 08:20 UTC3h 21m
2026-07-25 CAL102 KHH → NRT Jul 25, 23:55 UTCJul 26, 03:20 UTC3h 25m
2026-07-25 CAL127 NRT → KHH Jul 25, 10:50 UTCJul 25, 14:05 UTC3h 15m
2026-07-25 CAL126 KHH → NRT Jul 25, 05:40 UTCJul 25, 08:55 UTC3h 15m
2026-07-25 MDA968 - Jul 25, 03:15 UTCJul 25, 04:10 UTC55m
2026-07-24 MDA967 - Jul 24, 23:45 UTCJul 25, 00:20 UTC35m
2026-07-24 CAL936 HKG → KHH Jul 24, 13:10 UTCJul 24, 14:20 UTC1h 10m
2026-07-24 CAL935 KHH → HKG Jul 24, 10:05 UTCJul 24, 11:10 UTC1h 5m
2026-07-24 CAL103 NRT → KHH Jul 24, 05:00 UTCJul 24, 08:25 UTC3h 25m
2026-07-24 CAL102 KHH → NRT Jul 24, 00:00 UTCJul 24, 03:15 UTC3h 15m
2026-07-23 CAL127 NRT → KHH Jul 23, 10:20 UTCJul 23, 13:45 UTC3h 25m
2026-07-23 CAL126 KHH → NRT Jul 23, 05:30 UTCJul 23, 08:50 UTC3h 20m
2026-07-22 MDA968 KHH → KHH Jul 22, 23:45 UTCJul 23, 04:00 UTC4h 15m
2026-07-22 CAL177 KIX → KHH Jul 22, 11:50 UTCJul 22, 14:15 UTC2h 25m
2026-07-22 CAL165 ICN → KHH Jul 22, 03:35 UTCJul 22, 05:25 UTC1h 50m
2026-07-21 CAL164 KHH → ICN Jul 21, 23:25 UTCJul 22, 01:55 UTC2h 30m
2026-07-21 CAL177 KIX → KHH Jul 21, 11:55 UTCJul 21, 14:35 UTC2h 40m
2026-07-21 CAL176 KHH → KIX Jul 21, 07:50 UTCJul 21, 10:30 UTC2h 40m
2026-07-21 CAL165 ICN → KHH Jul 21, 03:30 UTCJul 21, 06:05 UTC2h 35m
2026-07-20 CAL164 KHH → ICN Jul 20, 23:15 UTCJul 21, 01:45 UTC2h 29m
2026-07-20 CAL936 HKG → KHH Jul 20, 12:55 UTCJul 20, 14:00 UTC1h 5m
2026-07-20 CAL935 KHH → HKG Jul 20, 10:15 UTCJul 20, 11:15 UTC1h 0m
2026-07-20 CAL103 NRT → KHH Jul 20, 04:55 UTCJul 20, 08:15 UTC3h 20m
2026-07-19 CAL102 KHH → NRT Jul 19, 23:55 UTCJul 20, 03:15 UTC3h 20m
2026-07-19 CAL127 NRT → KHH Jul 19, 10:10 UTCJul 19, 13:30 UTC3h 20m
2026-07-19 CAL126 KHH → NRT Jul 19, 05:20 UTCJul 19, 08:40 UTC3h 20m
2026-07-19 CAL934 HKG → KHH Jul 19, 03:00 UTCJul 19, 04:05 UTC1h 5m
2026-07-18 CAL933 KHH → HKG Jul 18, 23:35 UTCJul 19, 00:40 UTC1h 5m
2026-07-18 CAL936 HKG → KHH Jul 18, 12:55 UTCJul 18, 13:55 UTC1h 0m
2026-07-18 CAL935 KHH → HKG Jul 18, 10:10 UTCJul 18, 11:20 UTC1h 10m
2026-07-18 CAL103 NRT → KHH Jul 18, 05:05 UTCJul 18, 08:10 UTC3h 5m
2026-07-18 CAL102 KHH → NRT Jul 18, 00:10 UTCJul 18, 03:30 UTC3h 21m
2026-07-17 CAL936 HKG → KHH Jul 17, 13:00 UTCJul 17, 14:00 UTC1h 0m
2026-07-17 CAL935 KHH → HKG Jul 17, 10:15 UTCJul 17, 11:25 UTC1h 10m
2026-07-17 CAL103 NRT → KHH Jul 17, 05:04 UTCJul 17, 08:30 UTC3h 25m
2026-07-16 CAL102 KHH → NRT Jul 16, 23:55 UTCJul 17, 03:25 UTC3h 30m
2026-07-16 CAL936 - Jul 16, 13:00 UTCJul 16, 14:05 UTC1h 5m
2026-07-16 CAL935 KHH → HKG Jul 16, 10:04 UTCJul 16, 11:10 UTC1h 5m
2026-07-16 CAL103 NRT → KHH Jul 16, 04:55 UTCJul 16, 08:10 UTC3h 15m
2026-07-16 CAL102 - Jul 16, 00:00 UTCJul 16, 03:15 UTC3h 15m
2026-07-15 CAL102 KHH → KHH Jul 15, 23:50 UTCJul 15, 23:55 UTC5m
2026-07-15 CAL936 - Jul 15, 13:45 UTCJul 15, 14:45 UTC1h 0m
2026-07-15 CAL935 - Jul 15, 10:20 UTCJul 15, 11:25 UTC1h 5m
2026-07-15 CAL103 NRT → KHH Jul 15, 05:05 UTCJul 15, 08:30 UTC3h 25m
2026-07-15 CAL102 KHH → NRT Jul 15, 00:00 UTCJul 15, 03:25 UTC3h 25m
2026-07-14 CAL936 HKG → KHH Jul 14, 13:00 UTCJul 14, 14:05 UTC1h 5m
2026-07-14 CAL935 KHH → HKG Jul 14, 10:25 UTCJul 14, 11:30 UTC1h 5m
2026-07-14 CAL103 NRT → KHH Jul 14, 05:00 UTCJul 14, 08:25 UTC3h 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 B18112 page for operator, model, and routing details .

Mode-S 8990A8 frequently asked

What is Mode-S code 8990A8?
8990A8 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B18112.
Where is Mode-S 8990A8 registered?
Mode-S code 8990A8 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8990A8 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 14:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8990A8, octal 42310250, decimal 9,015,464.
What flights does 8990A8 operate?
Mode-S 8990A8 has broadcast 20 distinct callsigns, including CAL935, CAL103, CAL102, CAL936, CAL127.