Apparatus

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sensors Mode-S transponder

899104

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-18718 · BOEING 747-400

Hex
899104
Octal
42310404
Decimal
9,015,556
Country
TW
Tail
B-18718
Type
B744
No current signal · last broadcast 39m ago
Flights observed
330
Distinct callsigns
20
Country
TW
Last broadcast
39m ago

Last known position

Most recent position reported by Mode-S 899104.

Country allocation

The ICAO 24-bit address 899104 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
CAL5240 - 25 2026-07-03
CAL5637 - 22 2026-07-02
CAL5239 - 21 2026-07-04
CAL5640 China Airlines 17 2026-07-03
CAL5705 - 16 2026-07-09
CAL5706 - 12 2026-07-09
CAL5234 - 12 2026-07-11
CAL5233 - 12 2026-07-12
CAL5265 - 11 2026-07-14
CAL5266 - 10 2026-07-13
CAL5927 - 9 2026-06-30
CAL5895 China Airlines 9 2026-06-11
CAL6876 China Airlines 8 2026-06-19
CAL6842 - 8 2026-07-09
CAL5928 - 7 2026-06-30
CAL5896 China Airlines 7 2026-06-11
CAL6865 - 6 2026-06-28
CAL5226 China Airlines 6 2026-05-28
CAL6875 China Airlines 5 2026-06-19
CAL6841 - 5 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 CAL5266 - Jul 15, 04:15 UTCJul 15, 04:55 UTC40m
2026-07-14 CAL5265 - Jul 14, 23:25 UTCJul 14, 23:35 UTC10m
2026-07-14 CAL5265 - Jul 14, 14:15 UTCJul 14, 22:10 UTC7h 55m
2026-07-14 CAL5265 DFW → ANC Jul 14, 06:35 UTCJul 14, 12:35 UTC6h 0m
2026-07-13 CAL5266 - Jul 13, 22:20 UTCJul 14, 03:55 UTC5h 35m
2026-07-13 CAL5266 TPE → ANC Jul 13, 11:20 UTCJul 13, 20:10 UTC8h 50m
2026-07-13 CAL5852 - Jul 13, 06:45 UTCJul 13, 07:45 UTC1h 0m
2026-07-13 CAL5852 - Jul 13, 04:20 UTCJul 13, 04:35 UTC15m
2026-07-12 CAL5852 - Jul 12, 22:55 UTCJul 13, 02:01 UTC3h 5m
2026-07-12 CAL5851 - Jul 12, 20:01 UTCJul 12, 20:15 UTC15m
2026-07-12 CAL5851 - Jul 12, 15:50 UTCJul 12, 18:45 UTC2h 55m
2026-07-12 CAL5233 - Jul 12, 10:35 UTCJul 12, 11:05 UTC30m
2026-07-12 CAL5233 - Jul 12, 02:15 UTCJul 12, 09:30 UTC7h 15m
2026-07-11 CAL5233 ORD → ANC Jul 11, 17:05 UTCJul 11, 22:45 UTC5h 40m
2026-07-11 CAL5234 ANC → ORD Jul 11, 04:40 UTCJul 11, 10:00 UTC5h 20m
2026-07-10 CAL5234 - Jul 10, 16:10 UTCJul 10, 23:30 UTC7h 20m
2026-07-10 CAL5234 - Jul 10, 14:20 UTCJul 10, 14:35 UTC15m
2026-07-10 CAL6844 HKG → TPE Jul 10, 10:15 UTCJul 10, 11:35 UTC1h 20m
2026-07-10 CAL6843 - Jul 10, 05:05 UTCJul 10, 06:25 UTC1h 20m
2026-07-09 CAL6842 HKG → TPE Jul 9, 23:45 UTCJul 10, 01:05 UTC1h 20m
2026-07-09 CAL6842 - Jul 9, 19:30 UTCJul 9, 21:10 UTC1h 40m
2026-07-09 CAL6841 - Jul 9, 15:25 UTCJul 9, 17:10 UTC1h 45m
2026-07-09 CAL5705 - Jul 9, 09:05 UTCJul 9, 11:55 UTC2h 50m
2026-07-09 CAL5706 TPE → NRT Jul 9, 03:05 UTCJul 9, 06:00 UTC2h 55m
2026-07-08 CAL5897 TPE → TPE Jul 8, 16:50 UTCJul 8, 23:55 UTC7h 5m
2026-07-08 CAL5705 - Jul 8, 10:10 UTCJul 8, 13:00 UTC2h 50m
2026-07-08 CAL5706 TPE → NRT Jul 8, 05:00 UTCJul 8, 07:55 UTC2h 55m
2026-07-07 CAL5998 TPE → TPE Jul 7, 17:10 UTCJul 8, 01:25 UTC8h 15m
2026-07-07 CAL6888 - Jul 7, 12:15 UTCJul 7, 14:45 UTC2h 30m
2026-07-07 CAL6887 - Jul 7, 07:15 UTCJul 7, 09:20 UTC2h 5m
2026-07-07 CAL6842 HKG → TPE Jul 7, 00:50 UTCJul 7, 02:15 UTC1h 25m
2026-07-06 CAL6842 - Jul 6, 20:10 UTCJul 6, 21:45 UTC1h 35m
2026-07-06 CAL6841 TPE → MNL Jul 6, 15:20 UTCJul 6, 17:00 UTC1h 40m
2026-07-05 CAL5852 BKK → TPE Jul 5, 15:20 UTCJul 5, 18:40 UTC3h 20m
2026-07-05 CAL5852 - Jul 5, 09:35 UTCJul 5, 12:35 UTC3h 0m
2026-07-05 CAL5851 - Jul 5, 06:55 UTCJul 5, 07:10 UTC15m
2026-07-05 CAL5851 - Jul 5, 02:20 UTCJul 5, 05:25 UTC3h 5m
2026-07-04 CAL5239 ANC → TPE Jul 4, 13:45 UTCJul 4, 22:40 UTC8h 55m
2026-07-04 CAL5239 ORD → ANC Jul 4, 06:25 UTCJul 4, 12:00 UTC5h 35m
2026-07-03 CAL5240 ANC → ORD Jul 3, 21:05 UTCJul 4, 02:40 UTC5h 35m
2026-07-03 CAL5240 - Jul 3, 11:25 UTCJul 3, 19:50 UTC8h 25m
2026-07-03 CAL5640 LUX → TPE Jul 3, 02:55 UTCJul 3, 08:30 UTC5h 35m
2026-07-02 CAL5640 LUX → TPE Jul 2, 17:30 UTCJul 3, 00:35 UTC7h 5m
2026-07-02 CAL5637 DEL → LUX Jul 2, 06:45 UTCJul 2, 14:40 UTC7h 55m
2026-07-01 CAL5637 - Jul 1, 22:40 UTCJul 2, 04:20 UTC5h 40m
2026-07-01 CAL5870 - Jul 1, 17:00 UTCJul 1, 19:15 UTC2h 15m
2026-07-01 CAL5870 - Jul 1, 10:40 UTCJul 1, 14:30 UTC3h 50m
2026-07-01 CAL5869 - Jul 1, 08:20 UTCJul 1, 08:30 UTC10m
2026-07-01 CAL5869 - Jul 1, 03:55 UTCJul 1, 06:50 UTC2h 55m
2026-06-30 CAL5928 - Jun 30, 21:10 UTCJun 30, 22:20 UTC1h 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-18718 page for operator, model, and routing details .

Mode-S 899104 frequently asked

What is Mode-S code 899104?
899104 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-18718.
Where is Mode-S 899104 registered?
Mode-S code 899104 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 899104 broadcasting right now?
No active broadcast right now. Last signal was 39m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 899104, octal 42310404, decimal 9,015,556.
What flights does 899104 operate?
Mode-S 899104 has broadcast 20 distinct callsigns, including CAL5240, CAL5637, CAL5239, CAL5640, CAL5705.