Apparatus

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sensors Mode-S transponder

8990EE

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-18776 · BOEING 777-200LR

Hex
8990EE
Octal
42310356
Decimal
9,015,534
Country
TW
Tail
B-18776
Type
B77L
No current signal · last broadcast 2h ago
Flights observed
338
Distinct callsigns
20
Country
TW
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 8990EE.

Country allocation

The ICAO 24-bit address 8990EE 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
CAL5837 - 19 2026-07-12
CAL5381 - 19 2026-07-14
CAL5825 - 17 2026-07-14
CAL5826 - 14 2026-07-14
CAL5835 - 13 2026-07-01
CAL5382 - 13 2026-07-13
CAL5310 - 13 2026-07-05
CAL5137 - 13 2026-06-20
CAL5314 - 12 2026-06-30
CAL5313 China Airlines 12 2026-07-01
CAL5141 - 12 2026-06-22
CAL5138 - 12 2026-06-19
CAL5838 - 11 2026-07-12
CAL5142 - 10 2026-06-21
CAL5346 China Airlines 9 2026-05-27
CAL5309 - 9 2026-07-06
CAL5226 - 9 2026-07-07
CAL5225 - 9 2026-07-08
CAL5836 - 8 2026-07-01
CAL5345 China Airlines 7 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CAL5826 - Jul 14, 19:20 UTCJul 14, 19:30 UTC10m
2026-07-14 CAL5825 TPE → HKG Jul 14, 15:50 UTCJul 14, 17:05 UTC1h 15m
2026-07-14 CAL5381 - Jul 14, 12:55 UTCJul 14, 13:25 UTC30m
2026-07-14 CAL5381 - Jul 14, 01:40 UTCJul 14, 11:50 UTC10h 10m
2026-07-13 CAL5381 - Jul 13, 17:20 UTCJul 13, 22:50 UTC5h 30m
2026-07-13 CAL5382 - Jul 13, 10:40 UTCJul 13, 15:10 UTC4h 30m
2026-07-12 CAL5382 - Jul 12, 20:10 UTCJul 13, 08:35 UTC12h 25m
2026-07-12 CAL5826 HKG → TPE Jul 12, 14:55 UTCJul 12, 16:10 UTC1h 15m
2026-07-12 CAL5825 - Jul 12, 11:45 UTCJul 12, 13:01 UTC1h 15m
2026-07-12 CAL5838 HKG → TPE Jul 12, 08:35 UTCJul 12, 10:01 UTC1h 25m
2026-07-12 CAL5837 - Jul 12, 05:25 UTCJul 12, 05:40 UTC15m
2026-07-12 CAL5837 - Jul 12, 04:25 UTCJul 12, 04:50 UTC25m
2026-07-12 CAL5381 - Jul 12, 01:05 UTCJul 12, 01:45 UTC40m
2026-07-11 CAL5381 - Jul 11, 14:00 UTCJul 12, 00:01 UTC10h 0m
2026-07-11 CAL5381 - Jul 11, 00:25 UTCJul 11, 06:05 UTC5h 40m
2026-07-10 CAL5382 - Jul 10, 17:20 UTCJul 10, 21:55 UTC4h 36m
2026-07-10 CAL5382 - Jul 10, 03:40 UTCJul 10, 15:35 UTC11h 55m
2026-07-09 CAL5826 HKG → TPE Jul 9, 20:25 UTCJul 9, 21:45 UTC1h 20m
2026-07-09 CAL5825 - Jul 9, 16:30 UTCJul 9, 17:45 UTC1h 15m
2026-07-09 CAL5838 HKG → TPE Jul 9, 11:45 UTCJul 9, 13:10 UTC1h 25m
2026-07-09 CAL5837 TPE → HKG Jul 9, 07:40 UTCJul 9, 08:50 UTC1h 10m
2026-07-09 CAL5832 HKG → TPE Jul 9, 04:30 UTCJul 9, 05:55 UTC1h 25m
2026-07-09 CAL5831 TPE → HKG Jul 9, 00:55 UTCJul 9, 02:05 UTC1h 10m
2026-07-08 CAL5225 ANC → TPE Jul 8, 13:00 UTCJul 8, 22:10 UTC9h 10m
2026-07-08 CAL5225 - Jul 8, 05:40 UTCJul 8, 11:20 UTC5h 40m
2026-07-07 CAL5226 ANC → ORD Jul 7, 21:35 UTCJul 8, 03:05 UTC5h 30m
2026-07-07 CAL5226 - Jul 7, 11:10 UTCJul 7, 19:50 UTC8h 40m
2026-07-07 CAL6658 - Jul 7, 05:15 UTCJul 7, 08:40 UTC3h 25m
2026-07-06 CAL6657 - Jul 6, 23:25 UTCJul 7, 02:35 UTC3h 10m
2026-07-06 CAL5309 - Jul 6, 08:30 UTCJul 6, 17:45 UTC9h 15m
2026-07-06 CAL5309 JFK → ANC Jul 6, 00:25 UTCJul 6, 07:10 UTC6h 45m
2026-07-05 CAL5310 - Jul 5, 17:35 UTCJul 5, 18:50 UTC1h 15m
2026-07-05 CAL5310 ANC → YYZ Jul 5, 10:20 UTCJul 5, 15:55 UTC5h 35m
2026-07-05 CAL5310 TPE → ANC Jul 5, 00:25 UTCJul 5, 09:05 UTC8h 40m
2026-07-04 CAL5381 SEA → TPE Jul 4, 08:45 UTCJul 4, 20:25 UTC11h 40m
2026-07-04 CAL5381 - Jul 4, 00:40 UTCJul 4, 06:10 UTC5h 30m
2026-07-03 CAL5382 - Jul 3, 17:15 UTCJul 3, 22:25 UTC5h 10m
2026-07-03 CAL5382 - Jul 3, 03:45 UTCJul 3, 15:25 UTC11h 40m
2026-07-02 CAL5826 HKG → TPE Jul 2, 19:30 UTCJul 2, 20:55 UTC1h 25m
2026-07-02 CAL5825 - Jul 2, 17:00 UTCJul 2, 17:10 UTC10m
2026-07-02 CAL5825 - Jul 2, 15:55 UTCJul 2, 16:20 UTC25m
2026-07-02 CAL5838 HKG → TPE Jul 2, 11:50 UTCJul 2, 13:20 UTC1h 30m
2026-07-02 CAL5837 - Jul 2, 09:10 UTCJul 2, 09:30 UTC20m
2026-07-02 CAL5837 - Jul 2, 08:05 UTCJul 2, 08:35 UTC30m
2026-07-02 CAL5832 HKG → TPE Jul 2, 04:50 UTCJul 2, 06:15 UTC1h 25m
2026-07-02 CAL5831 - Jul 2, 02:15 UTCJul 2, 02:35 UTC20m
2026-07-02 CAL5831 - Jul 2, 01:15 UTCJul 2, 01:35 UTC20m
2026-07-01 CAL5836 HKG → TPE Jul 1, 21:15 UTCJul 1, 22:40 UTC1h 25m
2026-07-01 CAL5835 - Jul 1, 17:10 UTCJul 1, 18:25 UTC1h 15m
2026-07-01 CAL5313 ORD → NGO Jul 1, 12:00 UTCJul 1, 14:25 UTC2h 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-18776 page for operator, model, and routing details .

Mode-S 8990EE frequently asked

What is Mode-S code 8990EE?
8990EE is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-18776.
Where is Mode-S 8990EE registered?
Mode-S code 8990EE is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8990EE broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8990EE, octal 42310356, decimal 9,015,534.
What flights does 8990EE operate?
Mode-S 8990EE has broadcast 20 distinct callsigns, including CAL5837, CAL5381, CAL5825, CAL5826, CAL5835.