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 1d ago
Flights observed
194
Distinct callsigns
20
Country
TW
Last broadcast
1d 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 - 23 2026-07-04
CAL004 - 20 2026-07-03
CAL031 - 18 2026-07-11
CAL032 - 16 2026-07-09
CAL722 - 14 2026-07-13
CAL721 - 13 2026-07-13
CAL772 - 9 2026-07-01
CAL008 - 8 2026-06-29
CAL007 - 8 2026-06-30
CAL782 - 6 2026-07-11
CAL784 - 5 2026-07-02
CAL012 China Airlines 5 2026-07-07
CAL011 - 5 2026-07-08
CAL781 China Airlines 4 2026-05-20
CAL1806 China Airlines 4 2026-06-09
CAL024 China Airlines 4 2026-05-04
CAL504 - 3 2026-07-03
CAL502 - 3 2026-07-03
CAL100 China Airlines 3 2026-05-06
CAL783 China Airlines 2 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CAL722 - Jul 13, 07:25 UTCJul 13, 11:50 UTC4h 25m
2026-07-13 CAL721 - Jul 13, 01:25 UTCJul 13, 05:25 UTC4h 0m
2026-07-12 CAL123 - Jul 12, 13:20 UTCJul 12, 14:25 UTC1h 5m
2026-07-12 CAL122 - Jul 12, 10:40 UTCJul 12, 10:50 UTC10m
2026-07-12 CAL122 - Jul 12, 09:40 UTCJul 12, 10:05 UTC25m
2026-07-11 CAL782 TPE → TPE Jul 11, 23:45 UTCJul 12, 07:31 UTC7h 45m
2026-07-11 CAL031 - Jul 11, 20:25 UTCJul 11, 20:45 UTC20m
2026-07-11 CAL031 - Jul 11, 09:30 UTCJul 11, 19:05 UTC9h 35m
2026-07-09 CAL032 - Jul 9, 16:55 UTCJul 10, 03:15 UTC10h 20m
2026-07-08 CAL011 - Jul 8, 20:30 UTCJul 8, 21:00 UTC30m
2026-07-08 CAL011 - Jul 8, 05:45 UTCJul 8, 19:15 UTC13h 30m
2026-07-07 CAL012 TPE → JFK Jul 7, 12:05 UTCJul 8, 00:45 UTC12h 40m
2026-07-07 CAL012 TPE → JFK Jul 7, 10:15 UTCJul 7, 10:30 UTC15m
2026-07-07 CAL782 TPE → TPE Jul 7, 00:05 UTCJul 7, 08:05 UTC8h 0m
2026-07-06 CAL011 - Jul 6, 21:00 UTCJul 6, 21:25 UTC25m
2026-07-06 CAL011 - Jul 6, 06:40 UTCJul 6, 19:50 UTC13h 10m
2026-07-05 CAL012 TPE → JFK Jul 5, 12:10 UTCJul 6, 00:25 UTC12h 15m
2026-07-05 CAL012 TPE → JFK Jul 5, 10:20 UTCJul 5, 10:35 UTC15m
2026-07-04 CAL782 TPE → TPE Jul 4, 23:55 UTCJul 5, 07:30 UTC7h 35m
2026-07-04 CAL003 - Jul 4, 20:25 UTCJul 4, 20:45 UTC20m
2026-07-04 CAL003 - Jul 4, 08:20 UTCJul 4, 19:00 UTC10h 40m
2026-07-03 CAL004 - Jul 3, 17:10 UTCJul 4, 04:15 UTC11h 5m
2026-07-03 CAL504 - Jul 3, 14:50 UTCJul 3, 15:25 UTC35m
2026-07-03 CAL503 - Jul 3, 08:40 UTCJul 3, 09:10 UTC30m
2026-07-03 CAL502 TPE → TPE Jul 3, 01:05 UTCJul 3, 06:40 UTC5h 35m
2026-07-02 CAL784 TPE → TPE Jul 2, 06:00 UTCJul 2, 14:25 UTC8h 25m
2026-07-01 CAL772 - Jul 1, 02:15 UTCJul 1, 13:45 UTC11h 30m
2026-06-30 CAL007 LAX → TPE Jun 30, 07:25 UTCJun 30, 20:35 UTC13h 10m
2026-06-29 CAL008 - Jun 29, 18:19 UTCJun 30, 03:40 UTC9h 21m
2026-06-29 CAL008 - Jun 29, 16:25 UTCJun 29, 16:35 UTC10m
2026-06-29 CAL504 - Jun 29, 08:50 UTCJun 29, 13:34 UTC4h 45m
2026-06-29 CAL502 - Jun 29, 01:05 UTCJun 29, 05:45 UTC4h 40m
2026-06-28 CAL031 YVR → TPE Jun 28, 20:45 UTCJun 28, 21:14 UTC30m
2026-06-28 CAL031 YVR → TPE Jun 28, 09:20 UTCJun 28, 19:14 UTC9h 55m
2026-06-27 CAL032 TPE → YVR Jun 27, 18:04 UTCJun 28, 02:29 UTC8h 25m
2026-06-27 CAL032 TPE → YVR Jun 27, 16:20 UTCJun 27, 16:35 UTC15m
2026-06-27 CAL722 - Jun 27, 07:10 UTCJun 27, 11:35 UTC4h 25m
2026-06-27 CAL721 - Jun 27, 01:24 UTCJun 27, 05:25 UTC4h 0m
2026-06-26 CAL007 - Jun 26, 20:20 UTCJun 26, 20:40 UTC20m
2026-06-26 CAL007 - Jun 26, 07:35 UTCJun 26, 08:00 UTC25m
2026-06-25 CAL008 - Jun 25, 17:25 UTCJun 26, 04:39 UTC11h 15m
2026-06-25 CAL722 - Jun 25, 07:39 UTCJun 25, 12:15 UTC4h 35m
2026-06-25 CAL721 - Jun 25, 01:40 UTCJun 25, 05:50 UTC4h 10m
2026-06-24 CAL784 TPE → TPE Jun 24, 05:59 UTCJun 24, 14:39 UTC8h 40m
2026-06-23 CAL031 YVR → TPE Jun 23, 08:59 UTCJun 23, 20:24 UTC11h 25m
2026-06-22 CAL032 TPE → YVR Jun 22, 15:54 UTCJun 23, 01:59 UTC10h 5m
2026-06-22 CAL772 TPE → TPE Jun 22, 01:25 UTCJun 22, 12:44 UTC11h 20m
2026-06-21 CAL722 - Jun 21, 08:40 UTCJun 21, 13:00 UTC4h 20m
2026-06-21 CAL721 - Jun 21, 01:39 UTCJun 21, 06:14 UTC4h 35m
2026-06-19 CAL722 - Jun 19, 06:59 UTCJun 19, 11:14 UTC4h 15m

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 1d 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, CAL031, CAL032, CAL722.