Apparatus

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sensors Mode-S transponder

89901D

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-18003 · BOEING 777-300ER

Hex
89901D
Octal
42310035
Decimal
9,015,325
Country
TW
Tail
B-18003
Type
B77W
No current signal · last broadcast 3h ago
Flights observed
108
Distinct callsigns
20
Country
TW
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 89901D.

Country allocation

The ICAO 24-bit address 89901D 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
CAL003 - 17 2026-05-27
CAL004 - 13 2026-05-26
CAL032 China Airlines 11 2026-05-28
CAL031 China Airlines 11 2026-05-29
CAL722 China Airlines 6 2026-05-26
CAL721 China Airlines 5 2026-05-26
CAL781 China Airlines 4 2026-05-20
CAL772 China Airlines 4 2026-05-14
CAL024 China Airlines 4 2026-05-04
CAL100 China Airlines 3 2026-05-06
CAL784 China Airlines 2 2026-04-28
CAL783 China Airlines 2 2026-05-13
CAL782 China Airlines 2 2026-05-27
CAL1806 - 2 2026-05-11
CAL163 China Airlines 2 2026-04-15
CAL162 China Airlines 2 2026-04-15
CAL157 China Airlines 2 2026-04-17
CAL101 China Airlines 2 2026-05-06
CAL023 China Airlines 2 2026-05-05
CAL008 - 2 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CAL771 TPE → DPS May 30, 01:30 UTCMay 30, 04:25 UTC2h 55m
2026-05-29 CAL031 YVR → TPE May 29, 09:05 UTCMay 29, 21:10 UTC12h 5m
2026-05-28 CAL032 TPE → YVR May 28, 17:35 UTCMay 29, 02:25 UTC8h 50m
2026-05-28 CAL032 TPE → YVR May 28, 16:05 UTCMay 28, 16:25 UTC20m
2026-05-27 CAL782 SGN → TPE May 27, 23:35 UTCMay 28, 07:20 UTC7h 45m
2026-05-27 CAL003 - May 27, 08:30 UTCMay 27, 21:20 UTC12h 50m
2026-05-26 CAL004 TPE → SFO May 26, 16:15 UTCMay 27, 03:24 UTC11h 10m
2026-05-26 CAL722 KUL → TPE May 26, 07:10 UTCMay 26, 11:30 UTC4h 20m
2026-05-26 CAL721 TPE → KUL May 26, 01:05 UTCMay 26, 05:05 UTC4h 0m
2026-05-24 CAL031 YVR → TPE May 24, 20:45 UTCMay 24, 21:10 UTC25m
2026-05-24 CAL031 YVR → TPE May 24, 09:20 UTCMay 24, 19:30 UTC10h 10m
2026-05-23 CAL032 TPE → YVR May 23, 16:10 UTCMay 24, 02:05 UTC9h 56m
2026-05-22 CAL003 - May 22, 21:20 UTCMay 22, 21:40 UTC20m
2026-05-22 CAL003 - May 22, 08:45 UTCMay 22, 09:05 UTC20m
2026-05-21 CAL004 - May 21, 17:55 UTCMay 22, 02:45 UTC8h 50m
2026-05-21 CAL004 - May 21, 16:01 UTCMay 21, 16:15 UTC15m
2026-05-20 CAL781 TPE → SGN May 20, 23:45 UTCMay 21, 07:00 UTC7h 15m
2026-05-20 CAL007 - May 20, 20:15 UTCMay 20, 20:40 UTC25m
2026-05-20 CAL007 - May 20, 07:20 UTCMay 20, 18:55 UTC11h 35m
2026-05-19 CAL008 - May 19, 17:55 UTCMay 20, 03:35 UTC9h 40m
2026-05-19 CAL008 - May 19, 16:10 UTCMay 19, 16:25 UTC15m
2026-05-18 CAL722 KUL → TPE May 18, 07:15 UTCMay 18, 11:25 UTC4h 10m
2026-05-18 CAL721 TPE → KUL May 18, 01:30 UTCMay 18, 05:30 UTC4h 0m
2026-05-17 CAL031 YVR → TPE May 17, 09:00 UTCMay 17, 20:30 UTC11h 30m
2026-05-16 CAL032 TPE → YVR May 16, 16:20 UTCMay 17, 02:25 UTC10h 5m
2026-05-15 CAL003 - May 15, 20:40 UTCMay 15, 21:05 UTC25m
2026-05-15 CAL003 - May 15, 08:30 UTCMay 15, 19:20 UTC10h 49m
2026-05-14 CAL004 - May 14, 15:55 UTCMay 15, 02:15 UTC10h 20m
2026-05-14 CAL772 DPS → TPE May 14, 01:40 UTCMay 14, 12:50 UTC11h 10m
2026-05-13 CAL783 TPE → SGN May 13, 06:05 UTCMay 13, 13:55 UTC7h 50m
2026-05-12 CAL031 YVR → TPE May 12, 09:00 UTCMay 12, 20:45 UTC11h 45m
2026-05-11 CAL032 TPE → YVR May 11, 16:00 UTCMay 11, 18:00 UTC2h 1m
2026-05-11 CAL1806 - May 11, 09:05 UTCMay 11, 10:45 UTC1h 40m
2026-05-11 CAL1806 - May 11, 06:30 UTCMay 11, 08:30 UTC2h 0m
2026-05-10 CAL031 YVR → TPE May 10, 09:10 UTCMay 10, 21:25 UTC12h 15m
2026-05-09 CAL032 TPE → YVR May 9, 16:00 UTCMay 10, 01:50 UTC9h 50m
2026-05-08 CAL003 - May 8, 21:30 UTCMay 8, 21:55 UTC25m
2026-05-08 CAL003 - May 8, 08:34 UTCMay 8, 20:50 UTC12h 15m
2026-05-07 CAL004 - May 7, 17:25 UTCMay 8, 02:49 UTC9h 24m
2026-05-07 CAL004 - May 7, 15:55 UTCMay 7, 16:05 UTC10m
2026-05-06 CAL781 TPE → SGN May 6, 23:40 UTCMay 7, 06:55 UTC7h 15m
2026-05-06 CAL101 NRT → TPE May 6, 05:55 UTCMay 6, 09:10 UTC3h 15m
2026-05-06 CAL100 TPE → NRT May 6, 02:45 UTCMay 6, 04:00 UTC1h 15m
2026-05-06 CAL100 TPE → NRT May 6, 01:20 UTCMay 6, 01:35 UTC15m
2026-05-05 CAL023 ONT → TPE May 5, 07:30 UTCMay 5, 21:15 UTC13h 45m
2026-05-04 CAL024 TPE → ONT May 4, 13:40 UTCMay 5, 00:55 UTC11h 16m
2026-05-03 CAL031 YVR → TPE May 3, 21:14 UTCMay 3, 21:44 UTC30m
2026-05-03 CAL031 YVR → TPE May 3, 09:10 UTCMay 3, 20:35 UTC11h 25m
2026-05-02 CAL032 TPE → YVR May 2, 16:05 UTCMay 3, 02:20 UTC10h 15m
2026-05-01 CAL031 YVR → TPE May 1, 09:10 UTCMay 1, 21:00 UTC11h 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-18003 page for operator, model, and routing details .

Mode-S 89901D frequently asked

What is Mode-S code 89901D?
89901D is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-18003.
Where is Mode-S 89901D registered?
Mode-S code 89901D is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 89901D 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 89901D, octal 42310035, decimal 9,015,325.
What flights does 89901D operate?
Mode-S 89901D has broadcast 20 distinct callsigns, including CAL003, CAL004, CAL032, CAL031, CAL722.