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
Broadcasting now · callsign CAL5142 · 35,000 ft
Flights observed
307
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 20:50 UTC

Current position

8990A5 is currently broadcasting. Map zoomed to live position.

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
CAL5346 China Airlines 24 2026-07-25
CAL5345 China Airlines 20 2026-07-25
CAL5225 China Airlines 20 2026-05-06
CAL5142 - 20 2026-07-08
CAL5141 - 20 2026-07-09
CAL5382 China Airlines 17 2026-07-26
CAL5381 - 17 2026-07-21
CAL5310 China Airlines 17 2026-07-23
CAL5322 China Airlines 15 2026-06-20
CAL5309 China Airlines 11 2026-07-24
CAL5226 China Airlines 11 2026-05-05
CAL5321 China Airlines 10 2026-06-20
CAL5138 - 9 2026-07-14
CAL5137 - 9 2026-07-15
CAL5393 - 6 2026-07-12
CAL5394 - 5 2026-07-10
CAL5314 China Airlines 5 2026-06-02
CAL5313 China Airlines 5 2026-06-03
CAL5872 - 4 2026-07-12
CAL5871 - 4 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CAL5382 TPE → MIA Jul 26, 08:55 UTCJul 26, 20:50 UTC11h 55m
2026-07-25 CAL5345 SFO → TPE Jul 25, 17:20 UTCJul 26, 05:35 UTC12h 15m
2026-07-25 CAL5345 SFO → TPE Jul 25, 11:00 UTCJul 25, 15:15 UTC4h 15m
2026-07-25 CAL5346 SFO → ATL Jul 25, 04:40 UTCJul 25, 08:45 UTC4h 5m
2026-07-24 CAL5346 SFO → ATL Jul 24, 16:55 UTCJul 25, 02:50 UTC9h 55m
2026-07-24 CAL5346 SFO → ATL Jul 24, 15:20 UTCJul 24, 15:30 UTC10m
2026-07-24 CAL5309 JFK → ANC Jul 24, 02:00 UTCJul 24, 11:45 UTC9h 45m
2026-07-23 CAL5309 JFK → ANC Jul 23, 17:20 UTCJul 24, 00:20 UTC7h 0m
2026-07-23 CAL5310 TPE → ANC Jul 23, 13:45 UTCJul 23, 14:45 UTC1h 0m
2026-07-23 CAL5310 TPE → ANC Jul 23, 06:00 UTCJul 23, 11:45 UTC5h 45m
2026-07-22 CAL5310 TPE → ANC Jul 22, 20:20 UTCJul 23, 04:20 UTC8h 0m
2026-07-22 CAL5310 - Jul 22, 19:40 UTCJul 22, 19:50 UTC10m
2026-07-22 CAL5165 - Jul 22, 11:20 UTCJul 22, 12:05 UTC45m
2026-07-21 CAL5165 - Jul 21, 20:25 UTCJul 21, 21:30 UTC1h 5m
2026-07-21 CAL5166 TPE → LAX Jul 21, 06:55 UTCJul 21, 17:35 UTC10h 40m
2026-07-21 CAL5166 - Jul 21, 05:25 UTCJul 21, 05:40 UTC15m
2026-07-21 CAL5381 - Jul 21, 01:45 UTCJul 21, 02:05 UTC20m
2026-07-20 CAL5381 - Jul 20, 14:05 UTCJul 21, 00:25 UTC10h 19m
2026-07-20 CAL5381 MIA → SEA Jul 20, 06:20 UTCJul 20, 11:50 UTC5h 30m
2026-07-19 CAL5382 - Jul 19, 23:25 UTCJul 20, 04:00 UTC4h 35m
2026-07-19 CAL5382 - Jul 19, 09:20 UTCJul 19, 21:45 UTC12h 25m
2026-07-19 CAL5165 KIX → TPE Jul 19, 02:55 UTCJul 19, 05:15 UTC2h 20m
2026-07-18 CAL5165 - Jul 18, 12:35 UTCJul 18, 23:25 UTC10h 50m
2026-07-17 CAL5166 - Jul 17, 22:55 UTCJul 18, 09:40 UTC10h 46m
2026-07-17 CAL5166 - Jul 17, 21:15 UTCJul 17, 21:30 UTC15m
2026-07-17 CAL5309 JFK → ANC Jul 17, 05:50 UTCJul 17, 15:00 UTC9h 10m
2026-07-16 CAL5309 JFK → ANC Jul 16, 21:10 UTCJul 17, 04:29 UTC7h 20m
2026-07-16 CAL5310 YYZ → JFK Jul 16, 16:49 UTCJul 16, 17:54 UTC1h 5m
2026-07-16 CAL5310 ANC → YYZ Jul 16, 09:45 UTCJul 16, 15:00 UTC5h 15m
2026-07-16 CAL5310 - Jul 16, 01:30 UTCJul 16, 08:35 UTC7h 5m
2026-07-15 CAL5137 - Jul 15, 21:05 UTCJul 15, 21:25 UTC20m
2026-07-15 CAL5137 - Jul 15, 08:45 UTCJul 15, 19:55 UTC11h 10m
2026-07-14 CAL5138 - Jul 14, 17:25 UTCJul 15, 05:55 UTC12h 29m
2026-07-14 CAL5309 ANC → TPE Jul 14, 05:05 UTCJul 14, 14:10 UTC9h 5m
2026-07-13 CAL5309 - Jul 13, 20:35 UTCJul 14, 03:40 UTC7h 5m
2026-07-13 CAL5310 YYZ → JFK Jul 13, 16:30 UTCJul 13, 17:50 UTC1h 20m
2026-07-13 CAL5310 ANC → YYZ Jul 13, 09:10 UTCJul 13, 14:35 UTC5h 25m
2026-07-12 CAL5310 TPE → ANC Jul 12, 22:45 UTCJul 13, 07:25 UTC8h 40m
2026-07-12 CAL5872 - Jul 12, 19:15 UTCJul 12, 20:01 UTC45m
2026-07-12 - - Jul 12, 13:10 UTCJul 12, 13:20 UTC10m
2026-07-12 CAL5871 - Jul 12, 09:10 UTCJul 12, 11:45 UTC2h 35m
2026-07-12 CAL5393 - Jul 12, 01:25 UTCJul 12, 01:55 UTC30m
2026-07-11 CAL5393 - Jul 11, 14:30 UTCJul 12, 00:20 UTC9h 50m
2026-07-10 CAL5393 JFK → SEA Jul 10, 18:35 UTCJul 10, 23:50 UTC5h 15m
2026-07-10 CAL5394 ANC → JFK Jul 10, 09:35 UTCJul 10, 15:50 UTC6h 15m
2026-07-10 CAL5394 - Jul 10, 01:00 UTCJul 10, 08:25 UTC7h 25m
2026-07-09 CAL5394 - Jul 9, 23:35 UTCJul 9, 23:50 UTC15m
2026-07-09 CAL5141 - Jul 9, 11:40 UTCJul 9, 13:50 UTC2h 10m
2026-07-08 CAL5141 - Jul 8, 19:30 UTCJul 9, 08:20 UTC12h 50m
2026-07-08 CAL5142 KIX → ORD Jul 8, 05:05 UTCJul 8, 16:30 UTC11h 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-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?
Yes. Mode-S 8990A5 is currently airborne.
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 CAL5346, CAL5345, CAL5225, CAL5142, CAL5141.