Apparatus

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sensors Mode-S transponder

8990A5

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-18773 · BOEING 777-200LR

Hex
8990A5
Octal
42310245
Decimal
9,015,461
Country
TW
Tail
B-18773
Type
B77L
No current signal · last broadcast 10h ago
Flights observed
157
Distinct callsigns
20
Country
TW
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S 8990A5.

Country allocation

The ICAO 24-bit address 8990A5 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
CAL5225 China Airlines 20 2026-05-06
CAL5346 China Airlines 16 2026-05-20
CAL5345 China Airlines 14 2026-05-22
CAL5226 China Airlines 11 2026-05-05
CAL5142 China Airlines 10 2026-05-27
CAL5141 China Airlines 10 2026-05-28
CAL5382 China Airlines 9 2026-05-22
CAL5381 China Airlines 9 2026-05-23
CAL5322 China Airlines 9 2026-05-02
CAL5321 China Airlines 6 2026-05-03
CAL5138 China Airlines 4 2026-05-17
CAL5137 China Airlines 4 2026-05-17
CAL5314 China Airlines 3 2026-04-30
CAL5313 China Airlines 3 2026-05-01
CAL5116 China Airlines 3 2026-05-03
CAL5115 China Airlines 3 2026-05-04
CAL6881 China Airlines 2 2026-04-28
CAL5884 China Airlines 2 2026-05-20
CAL5877 China Airlines 2 2026-05-18
CAL5872 China Airlines 2 2026-05-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CAL5161 LAX → TPE May 29, 08:25 UTCMay 29, 22:15 UTC13h 50m
2026-05-28 CAL5162 TPE → LAX May 28, 17:55 UTCMay 29, 05:25 UTC11h 30m
2026-05-28 CAL5141 MIA → IAH May 28, 13:20 UTCMay 28, 13:50 UTC30m
2026-05-28 CAL5141 MIA → IAH May 28, 11:30 UTCMay 28, 12:00 UTC30m
2026-05-27 CAL5141 MIA → IAH May 27, 19:25 UTCMay 28, 09:10 UTC13h 45m
2026-05-27 CAL5142 TPE → ANC May 27, 05:09 UTCMay 27, 17:00 UTC11h 51m
2026-05-27 CAL5142 TPE → ANC May 27, 00:39 UTCMay 27, 02:49 UTC2h 10m
2026-05-26 CAL5117 LAX → TPE May 26, 20:24 UTCMay 26, 20:50 UTC25m
2026-05-26 CAL5117 LAX → TPE May 26, 07:19 UTCMay 26, 19:10 UTC11h 50m
2026-05-25 CAL5118 TPE → LAX May 25, 16:55 UTCMay 26, 04:35 UTC11h 40m
2026-05-25 CAL5141 MIA → IAH May 25, 11:10 UTCMay 25, 13:25 UTC2h 15m
2026-05-24 CAL5141 MIA → IAH May 24, 19:40 UTCMay 25, 08:25 UTC12h 45m
2026-05-24 CAL5142 TPE → ANC May 24, 05:00 UTCMay 24, 16:25 UTC11h 25m
2026-05-24 CAL5142 TPE → ANC May 24, 00:50 UTCMay 24, 03:00 UTC2h 10m
2026-05-23 CAL5381 MIA → TPE May 23, 09:10 UTCMay 23, 21:15 UTC12h 5m
2026-05-23 CAL5381 MIA → TPE May 23, 01:05 UTCMay 23, 06:50 UTC5h 45m
2026-05-22 CAL5382 TPE → MIA May 22, 18:00 UTCMay 22, 22:20 UTC4h 20m
2026-05-22 CAL5382 TPE → MIA May 22, 06:25 UTCMay 22, 16:15 UTC9h 50m
2026-05-22 CAL5382 TPE → MIA May 22, 04:55 UTCMay 22, 05:15 UTC20m
2026-05-22 CAL5345 SFO → TPE May 22, 01:40 UTCMay 22, 02:15 UTC35m
2026-05-21 CAL5345 SFO → TPE May 21, 12:55 UTCMay 22, 00:15 UTC11h 20m
2026-05-21 CAL5345 SFO → TPE May 21, 04:05 UTCMay 21, 08:35 UTC4h 30m
2026-05-20 CAL5346 SFO → ATL May 20, 21:50 UTCMay 21, 02:00 UTC4h 10m
2026-05-20 CAL5346 SFO → ATL May 20, 09:00 UTCMay 20, 19:50 UTC10h 50m
2026-05-20 CAL5884 BKK → TPE May 20, 02:45 UTCMay 20, 06:35 UTC3h 51m
2026-05-19 CAL5884 BKK → TPE May 19, 22:50 UTCMay 20, 00:35 UTC1h 45m
2026-05-19 CAL5883 TPE → SIN May 19, 15:45 UTCMay 19, 18:25 UTC2h 40m
2026-05-18 CAL5878 SIN → SGN May 18, 22:45 UTCMay 19, 04:55 UTC6h 10m
2026-05-18 CAL5877 TPE → SIN May 18, 19:50 UTCMay 18, 20:00 UTC10m
2026-05-18 CAL5877 TPE → SIN May 18, 15:45 UTCMay 18, 18:25 UTC2h 40m
2026-05-17 CAL5137 LAX → TPE May 17, 21:01 UTCMay 18, 10:25 UTC13h 25m
2026-05-17 CAL5138 TPE → LAX May 17, 06:40 UTCMay 17, 18:05 UTC11h 25m
2026-05-17 CAL5872 SIN → TPE May 17, 02:30 UTCMay 17, 03:55 UTC1h 25m
2026-05-16 CAL5872 SIN → TPE May 16, 23:25 UTCMay 16, 23:35 UTC10m
2026-05-16 CAL5871 TPE → SIN May 16, 16:35 UTCMay 16, 19:15 UTC2h 40m
2026-05-16 CAL5141 MIA → IAH May 16, 13:05 UTCMay 16, 13:35 UTC30m
2026-05-16 CAL5141 MIA → IAH May 16, 11:16 UTCMay 16, 11:46 UTC30m
2026-05-15 CAL5141 MIA → IAH May 15, 19:35 UTCMay 16, 08:55 UTC13h 21m
2026-05-15 CAL5142 TPE → ANC May 15, 05:15 UTCMay 15, 17:00 UTC11h 44m
2026-05-15 CAL5142 TPE → ANC May 15, 02:50 UTCMay 15, 03:30 UTC40m
2026-05-15 CAL5142 TPE → ANC May 15, 01:20 UTCMay 15, 01:30 UTC10m
2026-05-14 CAL5381 MIA → TPE May 14, 20:10 UTCMay 14, 20:50 UTC40m
2026-05-14 CAL5381 MIA → TPE May 14, 09:15 UTCMay 14, 18:50 UTC9h 35m
2026-05-14 CAL5381 MIA → TPE May 14, 01:30 UTCMay 14, 07:15 UTC5h 45m
2026-05-13 CAL5382 TPE → MIA May 13, 18:15 UTCMay 13, 22:45 UTC4h 30m
2026-05-13 CAL5382 TPE → MIA May 13, 05:35 UTCMay 13, 16:55 UTC11h 20m
2026-05-12 CAL5522 FRA → TPE May 12, 12:40 UTCMay 13, 02:25 UTC13h 45m
2026-05-11 CAL5021 TPE → DWC May 11, 18:35 UTCMay 12, 09:40 UTC15h 5m
2026-05-11 CAL5141 MIA → IAH May 11, 11:10 UTCMay 11, 14:00 UTC2h 50m
2026-05-10 CAL5141 MIA → IAH May 10, 19:54 UTCMay 11, 09:10 UTC13h 15m

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-18773 page for operator, model, and routing details .

Mode-S 8990A5 frequently asked

What is Mode-S code 8990A5?
8990A5 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-18773.
Where is Mode-S 8990A5 registered?
Mode-S code 8990A5 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8990A5 broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8990A5, octal 42310245, decimal 9,015,461.
What flights does 8990A5 operate?
Mode-S 8990A5 has broadcast 20 distinct callsigns, including CAL5225, CAL5346, CAL5345, CAL5226, CAL5142.