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sensors Mode-S transponder

89911C

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-18723 · BOEING 747-400

Hex
89911C
Octal
42310434
Decimal
9,015,580
Country
TW
Tail
B-18723
Type
B744
Broadcasting now · callsign CAL5239 · 40,000 ft
Flights observed
190
Distinct callsigns
20
Country
TW
Last broadcast
5m ago

Current position

89911C is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 89911C 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
CAL5265 China Airlines 15 2026-05-16
CAL5233 China Airlines 14 2026-05-28
CAL5266 China Airlines 13 2026-05-15
CAL5234 China Airlines 12 2026-05-27
CAL5706 China Airlines 9 2026-05-20
CAL5637 China Airlines 8 2026-05-30
CAL6865 China Airlines 7 2026-05-23
CAL5705 China Airlines 7 2026-05-20
CAL5640 China Airlines 7 2026-05-30
CAL6842 China Airlines 6 2026-05-29
CAL5895 China Airlines 6 2026-05-14
CAL5998 China Airlines 5 2026-05-22
CAL5240 China Airlines 5 2026-06-02
CAL6875 China Airlines 4 2026-05-01
CAL6866 China Airlines 4 2026-05-24
CAL6843 China Airlines 4 2026-05-22
CAL6596 China Airlines 4 2026-06-01
CAL5897 China Airlines 4 2026-05-06
CAL5896 China Airlines 4 2026-05-14
CAL5852 - 4 2026-05-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 CAL5239 ORD → ANC Jun 2, 20:40 UTCJun 2, 21:00 UTC20m
2026-06-02 CAL5240 TPE → ANC Jun 2, 12:25 UTCJun 2, 17:50 UTC5h 25m
2026-06-02 CAL5240 TPE → ANC Jun 2, 03:25 UTCJun 2, 11:00 UTC7h 35m
2026-06-02 CAL5240 TPE → ANC Jun 2, 01:55 UTCJun 2, 02:15 UTC20m
2026-06-01 CAL5898 PVG → TPE Jun 1, 16:05 UTCJun 1, 22:50 UTC6h 45m
2026-06-01 CAL6596 PEN → HAN Jun 1, 09:05 UTCJun 1, 11:20 UTC2h 15m
2026-06-01 CAL6596 PEN → HAN Jun 1, 04:30 UTCJun 1, 06:05 UTC1h 35m
2026-06-01 CAL6595 TPE → PEN Jun 1, 01:20 UTCJun 1, 01:40 UTC20m
2026-05-31 CAL6595 TPE → PEN May 31, 21:40 UTCMay 31, 22:40 UTC1h 0m
2026-05-30 CAL5640 LUX → TPE May 30, 16:10 UTCMay 30, 23:10 UTC7h 0m
2026-05-30 CAL5637 DEL → LUX May 30, 03:45 UTCMay 30, 11:55 UTC8h 10m
2026-05-29 CAL5637 DEL → LUX May 29, 19:30 UTCMay 30, 01:20 UTC5h 50m
2026-05-29 CAL6652 - May 29, 11:00 UTCMay 29, 16:40 UTC5h 40m
2026-05-29 CAL6651 TPE → BKK May 29, 04:55 UTCMay 29, 08:35 UTC3h 40m
2026-05-29 CAL6842 HKG → MNL May 29, 00:30 UTCMay 29, 01:50 UTC1h 20m
2026-05-28 CAL6842 HKG → MNL May 28, 22:00 UTCMay 28, 22:15 UTC15m
2026-05-28 CAL6842 HKG → MNL May 28, 20:35 UTCMay 28, 21:05 UTC30m
2026-05-28 CAL6841 TPE → MNL May 28, 15:30 UTCMay 28, 17:25 UTC1h 55m
2026-05-28 CAL5233 ANC → TPE May 28, 06:45 UTCMay 28, 07:20 UTC35m
2026-05-27 CAL5233 ANC → TPE May 27, 21:40 UTCMay 28, 05:25 UTC7h 45m
2026-05-27 CAL5233 ANC → TPE May 27, 14:35 UTCMay 27, 20:20 UTC5h 45m
2026-05-27 CAL5234 TPE → ANC May 27, 06:25 UTCMay 27, 11:40 UTC5h 16m
2026-05-26 CAL5234 TPE → ANC May 26, 20:09 UTCMay 27, 04:49 UTC8h 40m
2026-05-25 CAL5233 ANC → TPE May 25, 20:24 UTCMay 26, 05:25 UTC9h 0m
2026-05-25 CAL5233 ANC → TPE May 25, 12:55 UTCMay 25, 18:45 UTC5h 50m
2026-05-25 CAL5234 TPE → ANC May 25, 05:00 UTCMay 25, 10:15 UTC5h 15m
2026-05-24 CAL5234 TPE → ANC May 24, 18:25 UTCMay 25, 03:05 UTC8h 40m
2026-05-24 CAL6866 SIN → PEN May 24, 04:40 UTCMay 24, 11:55 UTC7h 15m
2026-05-23 CAL6865 SIN → PEN May 23, 21:55 UTCMay 24, 01:45 UTC3h 50m
2026-05-23 CAL5866 KUL → TPE May 23, 12:00 UTCMay 23, 19:30 UTC7h 30m
2026-05-23 CAL5865 TPE → KUL May 23, 06:15 UTCMay 23, 10:10 UTC3h 55m
2026-05-22 CAL5998 CKG → TPE May 22, 17:50 UTCMay 23, 03:20 UTC9h 29m
2026-05-22 CAL6844 HKG → TPE May 22, 13:30 UTCMay 22, 15:15 UTC1h 45m
2026-05-22 CAL6843 TPE → HKG May 22, 09:50 UTCMay 22, 10:05 UTC15m
2026-05-22 CAL6843 TPE → HKG May 22, 08:50 UTCMay 22, 09:15 UTC25m
2026-05-22 CAL5640 LUX → TPE May 22, 01:25 UTCMay 22, 07:05 UTC5h 40m
2026-05-21 CAL5640 LUX → TPE May 21, 14:20 UTCMay 21, 21:55 UTC7h 35m
2026-05-21 CAL5637 DEL → LUX May 21, 02:15 UTCMay 21, 10:00 UTC7h 45m
2026-05-20 CAL5637 DEL → LUX May 20, 18:00 UTCMay 20, 23:55 UTC5h 55m
2026-05-20 CAL5705 NRT → TPE May 20, 13:25 UTCMay 20, 13:55 UTC30m
2026-05-20 CAL5705 NRT → TPE May 20, 10:50 UTCMay 20, 12:00 UTC1h 10m
2026-05-20 CAL5706 TPE → NRT May 20, 05:30 UTCMay 20, 08:20 UTC2h 50m
2026-05-19 CAL5998 CKG → TPE May 19, 18:50 UTCMay 20, 02:25 UTC7h 35m
2026-05-18 CAL5640 LUX → TPE May 18, 23:45 UTCMay 19, 05:10 UTC5h 25m
2026-05-18 CAL5640 LUX → TPE May 18, 14:30 UTCMay 18, 21:55 UTC7h 24m
2026-05-18 CAL5637 DEL → LUX May 18, 02:45 UTCMay 18, 10:35 UTC7h 50m
2026-05-17 CAL5637 DEL → LUX May 17, 18:45 UTCMay 18, 00:40 UTC5h 55m
2026-05-17 CAL5852 - May 17, 13:10 UTCMay 17, 16:15 UTC3h 5m
2026-05-17 CAL5852 - May 17, 08:00 UTCMay 17, 11:01 UTC3h 0m
2026-05-17 CAL5851 TPE → MNL May 17, 01:15 UTCMay 17, 04:10 UTC2h 55m

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-18723 page for operator, model, and routing details .

Mode-S 89911C frequently asked

What is Mode-S code 89911C?
89911C is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-18723.
Where is Mode-S 89911C registered?
Mode-S code 89911C is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 89911C broadcasting right now?
Yes. Mode-S 89911C is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 89911C, octal 42310434, decimal 9,015,580.
What flights does 89911C operate?
Mode-S 89911C has broadcast 20 distinct callsigns, including CAL5265, CAL5233, CAL5266, CAL5234, CAL5706.