Apparatus

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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 2h ago
Flights observed
216
Distinct callsigns
20
Country
TW
Last broadcast
2h ago

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 - 28 2026-07-09
CAL004 - 26 2026-07-12
CAL007 - 23 2026-07-11
CAL003 - 21 2026-07-13
CAL772 - 11 2026-07-09
CAL024 China Airlines 11 2026-06-08
CAL784 China Airlines 9 2026-06-02
CAL722 - 9 2026-07-14
CAL721 - 9 2026-07-14
CAL023 China Airlines 8 2026-06-09
CAL157 - 5 2026-07-12
CAL101 China Airlines 5 2026-05-26
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
CAL771 - 3 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-07-02 CAL781 - Jul 2, 23:55 UTCJul 3, 07:40 UTC7h 45m
2026-07-02 CAL007 - Jul 2, 08:35 UTCJul 2, 21:30 UTC12h 55m
2026-07-01 CAL008 - Jul 1, 16:30 UTCJul 2, 04:05 UTC11h 35m
2026-07-01 CAL153 KIX → TPE Jul 1, 05:30 UTCJul 1, 07:55 UTC2h 25m
2026-07-01 CAL152 - Jul 1, 01:50 UTCJul 1, 04:00 UTC2h 10m
2026-06-30 CAL031 YVR → TPE Jun 30, 09:10 UTCJun 30, 20:55 UTC11h 45m
2026-06-29 CAL032 TPE → YVR Jun 29, 17:59 UTCJun 30, 02:05 UTC8h 6m
2026-06-29 CAL032 TPE → YVR Jun 29, 16:04 UTCJun 29, 16:19 UTC15m
2026-06-29 CAL772 - Jun 29, 01:34 UTCJun 29, 13:04 UTC11h 30m
2026-06-28 CAL504 - Jun 28, 13:10 UTCJun 28, 13:40 UTC30m
2026-06-28 CAL503 - Jun 28, 08:55 UTCJun 28, 09:20 UTC25m
2026-06-28 CAL502 - Jun 28, 05:29 UTCJun 28, 05:49 UTC20m
2026-06-28 CAL501 - Jun 28, 01:04 UTCJun 28, 01:25 UTC20m
2026-06-27 CAL003 - Jun 27, 08:29 UTCJun 27, 21:10 UTC12h 40m
2026-06-26 CAL004 - Jun 26, 17:54 UTCJun 27, 03:15 UTC9h 20m
2026-06-26 CAL772 - Jun 26, 01:54 UTCJun 26, 13:34 UTC11h 40m
2026-06-25 CAL007 - Jun 25, 20:39 UTCJun 25, 21:10 UTC30m
2026-06-25 CAL007 - Jun 25, 07:34 UTCJun 25, 19:20 UTC11h 45m
2026-06-24 CAL008 - Jun 24, 18:20 UTCJun 25, 03:34 UTC9h 15m
2026-06-24 CAL008 - Jun 24, 16:19 UTCJun 24, 16:34 UTC15m
2026-06-24 CAL772 - Jun 24, 01:49 UTCJun 24, 12:54 UTC11h 5m
2026-06-23 CAL007 - Jun 23, 07:45 UTCJun 23, 20:49 UTC13h 5m
2026-06-22 CAL008 - Jun 22, 17:44 UTCJun 23, 03:34 UTC9h 50m
2026-06-22 CAL008 - Jun 22, 16:14 UTCJun 22, 16:34 UTC20m
2026-06-21 CAL771 TPE → TPE Jun 21, 01:30 UTCJun 21, 12:40 UTC11h 10m
2026-06-20 CAL007 - Jun 20, 07:34 UTCJun 20, 20:25 UTC12h 50m

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 2h ago.
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, CAL004, CAL007, CAL003, CAL772.