Apparatus

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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
No current signal · last broadcast 3h ago
Flights observed
39
Distinct callsigns
13
Country
TW
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 89911C.

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 13 distinct

Callsign Airline Flights Last seen
CAL5265 China Airlines 9 2026-04-16
CAL5266 China Airlines 8 2026-04-15
CAL6875 China Airlines 3 2026-04-17
CAL5928 China Airlines 3 2026-04-16
CAL5927 - 3 2026-04-16
CAL6876 China Airlines 2 2026-04-17
CAL6596 - 2 2026-04-13
CAL5998 China Airlines 2 2026-04-18
CAL5997 China Airlines 2 2026-04-17
CAL5706 China Airlines 2 2026-04-18
CAL5898 - 1 2026-04-13
CAL5897 - 1 2026-04-13
CAL5705 China Airlines 1 2026-04-18

Recent flights last 39

DateFlightRouteTakeoffLandingDuration
2026-04-18 CAL5705 NRT → TPE Apr 18, 12:30 UTCApr 18, 15:50 UTC3h 20m
2026-04-18 CAL5706 TPE → NRT Apr 18, 08:10 UTCApr 18, 08:55 UTC45m
2026-04-18 CAL5706 TPE → NRT Apr 18, 06:25 UTCApr 18, 06:45 UTC20m
2026-04-18 CAL5998 CKG → TPE Apr 18, 03:25 UTCApr 18, 03:35 UTC10m
2026-04-18 CAL5998 CKG → TPE Apr 18, 02:25 UTCApr 18, 03:20 UTC55m
2026-04-17 CAL5997 TPE → CKG Apr 17, 19:25 UTCApr 17, 20:25 UTC1h 0m
2026-04-17 CAL5997 TPE → CKG Apr 17, 19:10 UTCApr 17, 19:20 UTC10m
2026-04-17 CAL6876 SIN → TPE Apr 17, 15:20 UTCApr 17, 16:35 UTC1h 15m
2026-04-17 CAL6876 SIN → TPE Apr 17, 09:25 UTCApr 17, 09:40 UTC15m
2026-04-17 CAL6875 TPE → SIN Apr 17, 06:40 UTCApr 17, 06:55 UTC15m
2026-04-17 CAL6875 TPE → SIN Apr 17, 03:20 UTCApr 17, 03:55 UTC35m
2026-04-17 CAL6875 TPE → SIN Apr 17, 02:55 UTCApr 17, 03:15 UTC20m
2026-04-16 CAL5928 SZX → TPE Apr 16, 23:20 UTCApr 16, 23:45 UTC25m
2026-04-16 CAL5928 SZX → TPE Apr 16, 22:30 UTCApr 16, 23:10 UTC40m
2026-04-16 CAL5927 - Apr 16, 17:50 UTCApr 16, 19:10 UTC1h 20m
2026-04-16 CAL5265 SFO → ANC Apr 16, 13:25 UTCApr 16, 14:00 UTC35m
2026-04-16 CAL5265 SFO → ANC Apr 16, 11:09 UTCApr 16, 11:29 UTC20m
2026-04-16 CAL5265 SFO → ANC Apr 16, 10:34 UTCApr 16, 11:04 UTC30m
2026-04-16 CAL5265 SFO → ANC Apr 16, 05:34 UTCApr 16, 05:45 UTC10m
2026-04-16 CAL5265 SFO → ANC Apr 16, 04:10 UTCApr 16, 05:00 UTC50m
2026-04-16 CAL5265 SFO → ANC Apr 16, 01:25 UTCApr 16, 03:04 UTC1h 40m
2026-04-15 CAL5265 SFO → ANC Apr 15, 23:25 UTCApr 16, 00:50 UTC1h 25m
2026-04-15 CAL5265 SFO → ANC Apr 15, 21:05 UTCApr 15, 23:00 UTC1h 55m
2026-04-15 CAL5265 SFO → ANC Apr 15, 20:55 UTCApr 15, 21:00 UTC5m
2026-04-15 CAL5266 ANC → DFW Apr 15, 17:05 UTCApr 15, 18:15 UTC1h 10m
2026-04-15 CAL5266 ANC → DFW Apr 15, 15:05 UTCApr 15, 17:00 UTC1h 55m
2026-04-15 CAL5266 ANC → DFW Apr 15, 13:01 UTCApr 15, 14:55 UTC1h 54m
2026-04-15 CAL5266 ANC → DFW Apr 15, 12:40 UTCApr 15, 12:55 UTC15m
2026-04-15 CAL5266 ANC → DFW Apr 15, 09:00 UTCApr 15, 10:10 UTC1h 10m
2026-04-15 CAL5266 ANC → DFW Apr 15, 08:40 UTCApr 15, 08:55 UTC15m
2026-04-15 CAL5266 ANC → DFW Apr 15, 03:50 UTCApr 15, 04:35 UTC45m
2026-04-15 CAL5266 ANC → DFW Apr 15, 02:05 UTCApr 15, 02:25 UTC20m
2026-04-14 CAL5928 SZX → TPE Apr 14, 20:55 UTCApr 14, 22:00 UTC1h 5m
2026-04-14 CAL5927 - Apr 14, 17:10 UTCApr 14, 17:30 UTC20m
2026-04-14 CAL5927 - Apr 14, 16:10 UTCApr 14, 16:35 UTC25m
2026-04-13 CAL5898 - Apr 13, 22:05 UTCApr 13, 22:30 UTC25m
2026-04-13 CAL5897 - Apr 13, 15:25 UTCApr 13, 15:45 UTC20m
2026-04-13 CAL6596 - Apr 13, 10:10 UTCApr 13, 11:35 UTC1h 25m
2026-04-13 CAL6596 - Apr 13, 05:10 UTCApr 13, 05:30 UTC20m

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?
No active broadcast right now. Last signal was 3h ago.
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 13 distinct callsigns, including CAL5265, CAL5266, CAL6875, CAL5928, CAL5927.