Apparatus

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sensors Mode-S transponder

899103

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-18717 · BOEING 747-400

Hex
899103
Octal
42310403
Decimal
9,015,555
Country
TW
Tail
B-18717
Type
B744
No current signal · last broadcast 2h ago
Flights observed
153
Distinct callsigns
20
Country
TW
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 899103.

Country allocation

The ICAO 24-bit address 899103 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
CAL5234 China Airlines 18 2026-05-18
CAL5233 China Airlines 17 2026-05-18
CAL5265 China Airlines 15 2026-05-28
CAL5266 China Airlines 14 2026-05-27
CAL5231 China Airlines 10 2026-04-24
CAL5232 - 7 2026-04-13
CAL5927 China Airlines 6 2026-05-28
CAL6842 China Airlines 5 2026-05-05
CAL5928 China Airlines 5 2026-05-28
CAL5240 China Airlines 5 2026-05-10
CAL5898 China Airlines 4 2026-05-29
CAL5239 China Airlines 4 2026-05-11
CAL6888 China Airlines 3 2026-05-26
CAL6865 China Airlines 3 2026-05-17
CAL6852 - 3 2026-05-29
CAL6851 China Airlines 3 2026-05-29
CAL5895 China Airlines 3 2026-05-07
CAL5226 China Airlines 3 2026-04-23
CAL6841 China Airlines 2 2026-05-04
CAL5998 China Airlines 2 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CAL5898 PVG → TPE May 29, 22:00 UTCMay 29, 22:30 UTC30m
2026-05-29 CAL5897 TPE → PVG May 29, 15:35 UTCMay 29, 16:10 UTC35m
2026-05-29 CAL6852 - May 29, 11:20 UTCMay 29, 12:25 UTC1h 5m
2026-05-29 CAL6852 - May 29, 08:25 UTCMay 29, 08:35 UTC10m
2026-05-29 CAL6851 TPE → PEN May 29, 05:40 UTCMay 29, 05:55 UTC15m
2026-05-29 CAL6851 TPE → PEN May 29, 01:45 UTCMay 29, 02:55 UTC1h 10m
2026-05-28 CAL5928 SZX → TPE May 28, 20:40 UTCMay 28, 22:00 UTC1h 20m
2026-05-28 CAL5927 TPE → SZX May 28, 16:25 UTCMay 28, 17:40 UTC1h 15m
2026-05-28 CAL5265 SFO → ANC May 28, 04:45 UTCMay 28, 14:35 UTC9h 50m
2026-05-27 CAL5265 SFO → ANC May 27, 21:35 UTCMay 28, 03:30 UTC5h 55m
2026-05-27 CAL5266 ANC → DFW May 27, 12:50 UTCMay 27, 18:50 UTC6h 0m
2026-05-27 CAL5266 ANC → DFW May 27, 02:19 UTCMay 27, 10:55 UTC8h 35m
2026-05-26 CAL5894 CAN → TPE May 26, 20:50 UTCMay 26, 22:15 UTC1h 25m
2026-05-26 CAL5893 TPE → CAN May 26, 16:24 UTCMay 26, 17:25 UTC1h 0m
2026-05-26 CAL6888 TPE → TPE May 26, 06:44 UTCMay 26, 14:20 UTC7h 35m
2026-05-25 CAL5898 PVG → TPE May 25, 16:00 UTCMay 25, 22:40 UTC6h 39m
2026-05-19 CAL6888 TPE → TPE May 19, 07:00 UTCMay 19, 14:50 UTC7h 50m
2026-05-18 CAL5233 ANC → TPE May 18, 18:55 UTCMay 19, 04:30 UTC9h 35m
2026-05-18 CAL5233 ANC → TPE May 18, 11:45 UTCMay 18, 17:20 UTC5h 35m
2026-05-18 CAL5234 TPE → ANC May 18, 03:55 UTCMay 18, 09:25 UTC5h 30m
2026-05-17 CAL5234 TPE → ANC May 17, 17:50 UTCMay 18, 02:40 UTC8h 50m
2026-05-17 CAL6866 SIN → PEN May 17, 11:35 UTCMay 17, 12:35 UTC1h 0m
2026-05-17 CAL6865 SIN → PEN May 17, 05:10 UTCMay 17, 05:50 UTC40m
2026-05-17 CAL6865 SIN → PEN May 17, 01:35 UTCMay 17, 01:45 UTC10m
2026-05-16 CAL6865 SIN → PEN May 16, 22:10 UTCMay 16, 23:10 UTC1h 0m
2026-05-16 CAL5866 KUL → TPE May 16, 11:05 UTCMay 16, 18:10 UTC7h 5m
2026-05-16 CAL5865 TPE → KUL May 16, 05:30 UTCMay 16, 09:25 UTC3h 56m
2026-05-16 CAL5992 - May 16, 01:55 UTCMay 16, 02:50 UTC55m
2026-05-15 CAL5991 - May 15, 21:35 UTCMay 15, 22:20 UTC45m
2026-05-15 CAL6852 - May 15, 10:55 UTCMay 15, 14:25 UTC3h 30m
2026-05-15 CAL6851 TPE → PEN May 15, 02:50 UTCMay 15, 03:45 UTC55m
2026-05-14 CAL5928 SZX → TPE May 14, 20:30 UTCMay 14, 21:40 UTC1h 10m
2026-05-14 CAL5927 TPE → SZX May 14, 16:45 UTCMay 14, 17:05 UTC20m
2026-05-14 CAL5927 TPE → SZX May 14, 15:40 UTCMay 14, 16:10 UTC30m
2026-05-14 CAL5265 SFO → ANC May 14, 03:10 UTCMay 14, 12:40 UTC9h 30m
2026-05-13 CAL5265 SFO → ANC May 13, 19:30 UTCMay 14, 01:30 UTC6h 0m
2026-05-13 CAL5266 ANC → DFW May 13, 10:55 UTCMay 13, 16:40 UTC5h 45m
2026-05-13 CAL5266 ANC → DFW May 13, 00:55 UTCMay 13, 09:20 UTC8h 25m
2026-05-12 CAL5928 SZX → TPE May 12, 21:05 UTCMay 12, 21:35 UTC30m
2026-05-12 CAL5928 SZX → TPE May 12, 20:25 UTCMay 12, 20:35 UTC10m
2026-05-12 CAL5927 TPE → SZX May 12, 16:55 UTCMay 12, 17:15 UTC20m
2026-05-12 CAL5927 TPE → SZX May 12, 15:55 UTCMay 12, 16:25 UTC30m
2026-05-11 CAL5897 TPE → PVG May 11, 16:10 UTCMay 11, 16:40 UTC30m
2026-05-11 CAL5239 ORD → ANC May 11, 02:40 UTCMay 11, 12:10 UTC9h 30m
2026-05-10 CAL5239 ORD → ANC May 10, 19:30 UTCMay 11, 01:20 UTC5h 50m
2026-05-10 CAL5240 TPE → ANC May 10, 10:35 UTCMay 10, 15:49 UTC5h 15m
2026-05-10 CAL5240 TPE → ANC May 10, 00:39 UTCMay 10, 08:45 UTC8h 5m
2026-05-09 CAL5705 NRT → TPE May 9, 11:40 UTCMay 9, 14:55 UTC3h 15m
2026-05-09 CAL5706 TPE → NRT May 9, 07:15 UTCMay 9, 09:10 UTC1h 55m
2026-05-09 CAL5706 TPE → NRT May 9, 06:35 UTCMay 9, 06:45 UTC10m

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-18717 page for operator, model, and routing details .

Mode-S 899103 frequently asked

What is Mode-S code 899103?
899103 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-18717.
Where is Mode-S 899103 registered?
Mode-S code 899103 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 899103 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 899103, octal 42310403, decimal 9,015,555.
What flights does 899103 operate?
Mode-S 899103 has broadcast 20 distinct callsigns, including CAL5234, CAL5233, CAL5265, CAL5266, CAL5231.