Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

89901B

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-18001 · BOEING 777-300ER

Hex
89901B
Octal
42310033
Decimal
9,015,323
Country
TW
Tail
B-18001
Type
B77W
No current signal · last broadcast Jul 26, 19:20 UTC
Flights observed
187
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 19:20 UTC

Last known position

Most recent position reported by Mode-S 89901B.

Country allocation

The ICAO 24-bit address 89901B 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
CAL004 - 16 2026-07-23
CAL003 - 16 2026-07-24
CAL008 - 14 2026-07-13
CAL007 - 14 2026-07-14
CAL032 China Airlines 13 2026-07-26
CAL023 China Airlines 12 2026-06-04
CAL024 China Airlines 11 2026-06-03
CAL784 China Airlines 10 2026-07-26
CAL772 - 10 2026-07-13
CAL031 - 10 2026-07-17
CAL722 China Airlines 9 2026-07-20
CAL721 China Airlines 7 2026-07-20
CAL783 - 5 2026-07-03
CAL782 - 4 2026-07-16
CAL157 - 4 2026-07-18
CAL156 - 4 2026-07-18
CAL781 - 3 2026-06-19
CAL153 - 3 2026-06-30
CAL152 - 3 2026-06-30
CAL923 China Airlines 2 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CAL032 TPE → YVR Jul 26, 16:25 UTCJul 26, 19:20 UTC2h 55m
2026-07-26 CAL784 SGN → TPE Jul 26, 05:55 UTCJul 26, 14:10 UTC8h 16m
2026-07-25 CAL910 HKG → TPE Jul 25, 06:25 UTCJul 25, 07:50 UTC1h 25m
2026-07-25 CAL909 TPE → HKG Jul 25, 03:25 UTCJul 25, 04:35 UTC1h 10m
2026-07-24 CAL003 - Jul 24, 20:15 UTCJul 24, 20:35 UTC20m
2026-07-24 CAL003 - Jul 24, 08:30 UTCJul 24, 18:55 UTC10h 25m
2026-07-23 CAL004 - Jul 23, 17:05 UTCJul 24, 04:00 UTC10h 55m
2026-07-23 CAL771 TPE → DPS Jul 23, 01:40 UTCJul 23, 12:50 UTC11h 10m
2026-07-22 CAL003 - Jul 22, 19:50 UTCJul 22, 20:05 UTC15m
2026-07-22 CAL003 - Jul 22, 11:10 UTCJul 22, 19:15 UTC8h 5m
2026-07-21 CAL004 - Jul 21, 18:05 UTCJul 22, 04:00 UTC9h 55m
2026-07-21 CAL004 - Jul 21, 16:25 UTCJul 21, 16:35 UTC10m
2026-07-20 CAL722 KUL → TPE Jul 20, 07:30 UTCJul 20, 11:45 UTC4h 15m
2026-07-20 CAL721 TPE → KUL Jul 20, 01:25 UTCJul 20, 05:35 UTC4h 10m
2026-07-19 CAL784 TPE → TPE Jul 19, 06:05 UTCJul 19, 14:25 UTC8h 20m
2026-07-18 CAL504 - Jul 18, 16:05 UTCJul 18, 16:25 UTC20m
2026-07-18 CAL503 - Jul 18, 08:40 UTCJul 18, 08:55 UTC15m
2026-07-18 CAL157 - Jul 18, 06:45 UTCJul 18, 07:05 UTC20m
2026-07-18 CAL157 - Jul 18, 05:00 UTCJul 18, 05:40 UTC40m
2026-07-18 CAL156 - Jul 18, 02:25 UTCJul 18, 03:20 UTC56m
2026-07-18 CAL156 - Jul 18, 00:50 UTCJul 18, 01:00 UTC10m
2026-07-17 CAL031 YVR → TPE Jul 17, 09:10 UTCJul 17, 20:25 UTC11h 15m
2026-07-16 CAL032 - Jul 16, 17:00 UTCJul 17, 03:10 UTC10h 10m
2026-07-16 CAL782 - Jul 16, 00:00 UTCJul 16, 07:25 UTC7h 25m
2026-07-14 CAL007 - Jul 14, 08:10 UTCJul 14, 20:35 UTC12h 25m
2026-07-13 CAL008 TPE → LAX Jul 13, 16:35 UTCJul 14, 04:55 UTC12h 20m
2026-07-13 CAL772 TPE → TPE Jul 13, 01:35 UTCJul 13, 12:50 UTC11h 15m
2026-07-12 CAL784 TPE → TPE Jul 12, 06:05 UTCJul 12, 14:25 UTC8h 20m
2026-07-03 CAL783 - Jul 3, 06:00 UTCJul 3, 14:10 UTC8h 10m
2026-07-02 CAL722 - Jul 2, 07:30 UTCJul 2, 11:45 UTC4h 15m
2026-07-02 CAL721 - Jul 2, 01:15 UTCJul 2, 05:25 UTC4h 10m
2026-07-01 CAL031 YVR → TPE Jul 1, 09:05 UTCJul 1, 21:05 UTC12h 0m
2026-06-30 CAL032 TPE → YVR Jun 30, 18:10 UTCJul 1, 02:25 UTC8h 15m
2026-06-30 CAL032 TPE → YVR Jun 30, 16:15 UTCJun 30, 16:30 UTC15m
2026-06-30 CAL153 - Jun 30, 05:20 UTCJun 30, 07:45 UTC2h 25m
2026-06-30 CAL152 - Jun 30, 02:55 UTCJun 30, 03:35 UTC40m
2026-06-30 CAL152 - Jun 30, 01:25 UTCJun 30, 01:35 UTC11m
2026-06-29 CAL783 - Jun 29, 06:05 UTCJun 29, 13:54 UTC7h 50m
2026-06-26 CAL153 - Jun 26, 07:39 UTCJun 26, 08:05 UTC25m
2026-06-26 CAL153 - Jun 26, 05:35 UTCJun 26, 06:09 UTC35m
2026-06-26 CAL152 TPE → KIX Jun 26, 01:29 UTCJun 26, 03:34 UTC2h 5m
2026-06-25 CAL157 KIX → TPE Jun 25, 04:29 UTCJun 25, 06:50 UTC2h 20m
2026-06-25 CAL156 - Jun 25, 00:44 UTCJun 25, 02:54 UTC2h 10m
2026-06-24 CAL007 - Jun 24, 07:40 UTCJun 24, 20:49 UTC13h 10m
2026-06-23 CAL008 - Jun 23, 18:20 UTCJun 24, 03:29 UTC9h 10m
2026-06-23 CAL008 - Jun 23, 16:24 UTCJun 23, 16:35 UTC10m
2026-06-23 CAL772 - Jun 23, 02:20 UTCJun 23, 13:09 UTC10h 50m
2026-06-22 CAL007 - Jun 22, 07:30 UTCJun 22, 20:30 UTC13h 0m
2026-06-21 CAL008 - Jun 21, 16:25 UTCJun 22, 03:54 UTC11h 30m
2026-06-21 CAL783 TPE → TPE Jun 21, 06:04 UTCJun 21, 14:10 UTC8h 5m

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-18001 page for operator, model, and routing details .

Mode-S 89901B frequently asked

What is Mode-S code 89901B?
89901B is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-18001.
Where is Mode-S 89901B registered?
Mode-S code 89901B is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 89901B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 89901B, octal 42310033, decimal 9,015,323.
What flights does 89901B operate?
Mode-S 89901B has broadcast 20 distinct callsigns, including CAL004, CAL003, CAL008, CAL007, CAL032.