Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

8990A0

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-18771 · BOEING 777-200LR

Hex
8990A0
Octal
42310240
Decimal
9,015,456
Country
TW
Tail
B-18771
Type
B77L
No current signal · last broadcast Jul 23, 08:00 UTC
Flights observed
286
Distinct callsigns
20
Country
TW
Last broadcast
Jul 23, 08:00 UTC

Last known position

Most recent position reported by Mode-S 8990A0.

Country allocation

The ICAO 24-bit address 8990A0 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
CAL5345 - 21 2026-07-12
CAL5346 - 20 2026-07-10
CAL5311 China Airlines 19 2026-07-23
CAL5312 - 18 2026-07-22
CAL5310 - 15 2026-06-28
CAL5382 - 13 2026-06-26
CAL5162 - 13 2026-07-15
CAL5142 - 13 2026-07-17
CAL5141 - 13 2026-07-19
CAL5381 - 12 2026-06-27
CAL5115 - 11 2026-07-06
CAL5309 - 10 2026-06-29
CAL5161 - 10 2026-07-16
CAL5225 China Airlines 9 2026-06-03
CAL5336 - 8 2026-07-07
CAL5226 China Airlines 7 2026-06-02
CAL5166 - 7 2026-07-14
CAL5116 - 7 2026-07-05
CAL5335 - 6 2026-07-07
CAL5231 China Airlines 5 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 CAL5311 JFK → ANC Jul 23, 07:35 UTCJul 23, 08:00 UTC25m
2026-07-22 CAL5311 JFK → ANC Jul 22, 22:20 UTCJul 23, 06:10 UTC7h 50m
2026-07-22 CAL5311 JFK → ANC Jul 22, 13:50 UTCJul 22, 20:45 UTC6h 55m
2026-07-22 CAL5312 - Jul 22, 04:50 UTCJul 22, 10:25 UTC5h 35m
2026-07-21 CAL5312 - Jul 21, 19:40 UTCJul 22, 02:05 UTC6h 25m
2026-07-21 CAL5312 - Jul 21, 17:45 UTCJul 21, 18:00 UTC15m
2026-07-21 CAL6658 - Jul 21, 07:15 UTCJul 21, 10:55 UTC3h 40m
2026-07-21 CAL6657 - Jul 21, 00:20 UTCJul 21, 04:05 UTC3h 45m
2026-07-20 CAL5137 LAX → TPE Jul 20, 08:30 UTCJul 20, 21:05 UTC12h 35m
2026-07-19 CAL5138 TPE → LAX Jul 19, 18:40 UTCJul 20, 05:45 UTC11h 5m
2026-07-19 CAL5138 TPE → LAX Jul 19, 17:10 UTCJul 19, 17:25 UTC15m
2026-07-19 CAL5141 - Jul 19, 10:25 UTCJul 19, 11:00 UTC35m
2026-07-19 CAL5141 - Jul 19, 08:40 UTCJul 19, 09:15 UTC35m
2026-07-17 CAL5141 - Jul 17, 22:10 UTCJul 18, 10:55 UTC12h 46m
2026-07-17 CAL5142 KIX → ORD Jul 17, 08:04 UTCJul 17, 19:55 UTC11h 50m
2026-07-17 CAL5142 - Jul 17, 03:39 UTCJul 17, 05:55 UTC2h 15m
2026-07-16 CAL5161 - Jul 16, 10:29 UTCJul 16, 23:05 UTC12h 35m
2026-07-15 CAL5162 - Jul 15, 19:05 UTCJul 16, 07:15 UTC12h 10m
2026-07-15 CAL5165 KIX → TPE Jul 15, 13:05 UTCJul 15, 15:15 UTC2h 10m
2026-07-14 CAL5165 - Jul 14, 23:45 UTCJul 15, 11:05 UTC11h 20m
2026-07-14 CAL5166 - Jul 14, 09:00 UTCJul 14, 21:10 UTC12h 10m
2026-07-14 CAL5141 - Jul 14, 03:05 UTCJul 14, 05:20 UTC2h 15m
2026-07-13 CAL5141 - Jul 13, 11:20 UTCJul 14, 00:05 UTC12h 45m
2026-07-12 CAL5142 - Jul 12, 12:50 UTCJul 13, 00:35 UTC11h 45m
2026-07-12 CAL5142 TPE → KIX Jul 12, 08:35 UTCJul 12, 10:50 UTC2h 15m
2026-07-12 CAL5345 - Jul 12, 00:45 UTCJul 12, 01:25 UTC40m
2026-07-11 CAL5345 - Jul 11, 12:30 UTCJul 11, 23:30 UTC11h 0m
2026-07-11 CAL5345 - Jul 11, 03:55 UTCJul 11, 08:15 UTC4h 20m
2026-07-10 CAL5346 - Jul 10, 21:10 UTCJul 11, 01:20 UTC4h 10m
2026-07-10 CAL5346 - Jul 10, 10:00 UTCJul 10, 19:30 UTC9h 30m
2026-07-10 CAL5346 - Jul 10, 08:10 UTCJul 10, 08:25 UTC15m
2026-07-09 CAL5161 - Jul 9, 03:50 UTCJul 9, 16:50 UTC13h 0m
2026-07-08 CAL5162 - Jul 8, 14:55 UTCJul 9, 00:55 UTC10h 0m
2026-07-08 CAL5162 - Jul 8, 13:10 UTCJul 8, 13:20 UTC10m
2026-07-07 CAL5335 SEA → TPE Jul 7, 21:55 UTCJul 8, 10:00 UTC12h 5m
2026-07-07 CAL5335 - Jul 7, 15:40 UTCJul 7, 19:25 UTC3h 45m
2026-07-07 CAL5336 ANC → ORD Jul 7, 08:20 UTCJul 7, 13:40 UTC5h 20m
2026-07-06 CAL5336 - Jul 6, 23:45 UTCJul 7, 06:50 UTC7h 5m
2026-07-06 CAL5336 ANC → ORD Jul 6, 22:15 UTCJul 6, 22:25 UTC10m
2026-07-06 CAL5115 - Jul 6, 06:25 UTCJul 6, 19:25 UTC13h 0m
2026-07-05 CAL5116 - Jul 5, 17:25 UTCJul 6, 03:25 UTC10h 0m
2026-07-05 CAL5116 - Jul 5, 15:35 UTCJul 5, 15:50 UTC15m
2026-07-05 CAL5313 ORD → NGO Jul 5, 10:30 UTCJul 5, 13:00 UTC2h 30m
2026-07-04 CAL5313 ORD → NGO Jul 4, 20:15 UTCJul 5, 08:20 UTC12h 5m
2026-07-04 CAL5314 - Jul 4, 06:15 UTCJul 4, 17:40 UTC11h 25m
2026-07-04 CAL5314 - Jul 4, 01:45 UTCJul 4, 03:50 UTC2h 5m
2026-07-03 CAL5161 - Jul 3, 09:10 UTCJul 3, 22:05 UTC12h 55m
2026-07-02 CAL5162 - Jul 2, 19:50 UTCJul 3, 05:45 UTC9h 55m
2026-07-02 CAL5162 - Jul 2, 18:20 UTCJul 2, 18:35 UTC15m
2026-07-02 CAL5161 - Jul 2, 01:10 UTCJul 2, 14:20 UTC13h 10m

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-18771 page for operator, model, and routing details .

Mode-S 8990A0 frequently asked

What is Mode-S code 8990A0?
8990A0 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-18771.
Where is Mode-S 8990A0 registered?
Mode-S code 8990A0 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8990A0 broadcasting right now?
No active broadcast right now. Last signal was Jul 23, 08:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8990A0, octal 42310240, decimal 9,015,456.
What flights does 8990A0 operate?
Mode-S 8990A0 has broadcast 20 distinct callsigns, including CAL5345, CAL5346, CAL5311, CAL5312, CAL5310.