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sensors Mode-S transponder

89901C

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-18002 · BOEING 777-300ER

Hex
89901C
Octal
42310034
Decimal
9,015,324
Country
TW
Tail
B-18002
Type
B77W
No current signal · last broadcast Jul 26, 11:50 UTC
Flights observed
242
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 11:50 UTC

Last known position

Most recent position reported by Mode-S 89901C.

Country allocation

The ICAO 24-bit address 89901C 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
CAL008 - 36 2026-07-24
CAL007 - 30 2026-07-25
CAL004 - 26 2026-07-12
CAL003 - 21 2026-07-13
CAL024 China Airlines 13 2026-07-20
CAL772 China Airlines 12 2026-07-24
CAL722 China Airlines 11 2026-07-26
CAL721 China Airlines 11 2026-07-26
CAL784 - 10 2026-07-16
CAL023 - 10 2026-07-21
CAL157 - 5 2026-07-12
CAL101 China Airlines 5 2026-05-26
CAL504 China Airlines 4 2026-07-22
CAL503 - 4 2026-06-28
CAL156 - 4 2026-07-12
CAL100 China Airlines 4 2026-05-26
CAL032 China Airlines 4 2026-06-29
CAL031 China Airlines 4 2026-06-30
CAL783 China Airlines 3 2026-05-10
CAL782 China Airlines 3 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CAL722 KUL → TPE Jul 26, 07:25 UTCJul 26, 11:50 UTC4h 25m
2026-07-26 CAL721 TPE → KUL Jul 26, 01:15 UTCJul 26, 05:20 UTC4h 5m
2026-07-25 CAL007 - Jul 25, 20:40 UTCJul 25, 20:55 UTC15m
2026-07-25 CAL007 - Jul 25, 08:15 UTCJul 25, 19:20 UTC11h 5m
2026-07-24 CAL008 - Jul 24, 17:25 UTCJul 25, 04:50 UTC11h 25m
2026-07-24 CAL008 - Jul 24, 16:45 UTCJul 24, 16:55 UTC10m
2026-07-24 CAL772 DPS → TPE Jul 24, 01:50 UTCJul 24, 14:20 UTC12h 30m
2026-07-23 CAL007 - Jul 23, 20:40 UTCJul 23, 21:05 UTC25m
2026-07-23 CAL007 - Jul 23, 08:20 UTCJul 23, 19:20 UTC11h 0m
2026-07-22 CAL008 - Jul 22, 17:15 UTCJul 23, 04:45 UTC11h 30m
2026-07-22 CAL008 - Jul 22, 16:30 UTCJul 22, 16:45 UTC15m
2026-07-22 CAL504 PVG → TPE Jul 22, 13:40 UTCJul 22, 14:10 UTC30m
2026-07-21 CAL023 - Jul 21, 20:15 UTCJul 21, 20:30 UTC15m
2026-07-21 CAL023 - Jul 21, 07:55 UTCJul 21, 18:55 UTC11h 0m
2026-07-20 CAL024 TPE → ONT Jul 20, 15:45 UTCJul 21, 02:10 UTC10h 24m
2026-07-20 CAL024 TPE → ONT Jul 20, 13:55 UTCJul 20, 14:10 UTC15m
2026-07-19 CAL007 - Jul 19, 20:50 UTCJul 19, 21:15 UTC25m
2026-07-19 CAL007 - Jul 19, 08:30 UTCJul 19, 19:40 UTC11h 10m
2026-07-18 CAL008 - Jul 18, 18:20 UTCJul 19, 04:45 UTC10h 25m
2026-07-18 CAL008 - Jul 18, 16:30 UTCJul 18, 16:40 UTC10m
2026-07-17 CAL007 LAX → TPE Jul 17, 08:49 UTCJul 17, 21:10 UTC12h 20m
2026-07-16 CAL008 - Jul 16, 18:50 UTCJul 17, 05:30 UTC10h 40m
2026-07-16 CAL008 - Jul 16, 17:20 UTCJul 16, 17:30 UTC10m
2026-07-16 CAL784 TPE → TPE Jul 16, 06:15 UTCJul 16, 14:10 UTC7h 55m
2026-07-15 CAL722 - Jul 15, 07:15 UTCJul 15, 11:35 UTC4h 20m
2026-07-15 CAL721 - Jul 15, 01:20 UTCJul 15, 05:15 UTC3h 55m
2026-07-14 CAL722 - Jul 14, 07:20 UTCJul 14, 11:45 UTC4h 25m
2026-07-14 CAL721 - Jul 14, 01:30 UTCJul 14, 05:35 UTC4h 5m
2026-07-13 CAL003 - Jul 13, 08:25 UTCJul 13, 20:25 UTC12h 0m
2026-07-12 CAL004 TPE → SFO Jul 12, 16:20 UTCJul 13, 04:00 UTC11h 40m
2026-07-12 CAL157 - Jul 12, 06:45 UTCJul 12, 07:10 UTC25m
2026-07-12 CAL157 - Jul 12, 05:05 UTCJul 12, 05:40 UTC35m
2026-07-12 CAL156 TPE → KIX Jul 12, 00:35 UTCJul 12, 02:45 UTC2h 10m
2026-07-11 CAL007 - Jul 11, 08:35 UTCJul 11, 21:35 UTC13h 0m
2026-07-09 CAL008 - Jul 9, 18:50 UTCJul 10, 04:55 UTC10h 5m
2026-07-09 CAL008 - Jul 9, 17:05 UTCJul 9, 17:15 UTC10m
2026-07-09 CAL772 - Jul 9, 01:50 UTCJul 9, 13:05 UTC11h 15m
2026-07-08 CAL007 - Jul 8, 20:55 UTCJul 8, 21:25 UTC30m
2026-07-08 CAL007 - Jul 8, 08:20 UTCJul 8, 19:45 UTC11h 25m
2026-07-07 CAL008 - Jul 7, 18:15 UTCJul 8, 04:30 UTC10h 15m
2026-07-07 CAL008 - Jul 7, 16:40 UTCJul 7, 16:55 UTC15m
2026-07-07 CAL772 - Jul 7, 01:45 UTCJul 7, 13:15 UTC11h 30m
2026-07-06 CAL007 - Jul 6, 08:50 UTCJul 6, 21:50 UTC13h 0m
2026-07-05 CAL008 - Jul 5, 18:00 UTCJul 6, 04:05 UTC10h 5m
2026-07-05 CAL008 - Jul 5, 16:30 UTCJul 5, 16:45 UTC15m
2026-07-05 CAL722 - Jul 5, 07:30 UTCJul 5, 11:50 UTC4h 20m
2026-07-05 CAL721 - Jul 5, 01:20 UTCJul 5, 05:20 UTC4h 0m
2026-07-04 CAL007 - Jul 4, 20:40 UTCJul 4, 21:00 UTC20m
2026-07-04 CAL007 - Jul 4, 08:10 UTCJul 4, 19:15 UTC11h 5m
2026-07-03 CAL008 - Jul 3, 16:35 UTCJul 4, 04:15 UTC11h 40m

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-18002 page for operator, model, and routing details .

Mode-S 89901C frequently asked

What is Mode-S code 89901C?
89901C is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-18002.
Where is Mode-S 89901C registered?
Mode-S code 89901C is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 89901C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 89901C, octal 42310034, decimal 9,015,324.
What flights does 89901C operate?
Mode-S 89901C has broadcast 20 distinct callsigns, including CAL008, CAL007, CAL004, CAL003, CAL024.