Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

89917F

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-18123 · AIRBUS A-321neo

Hex
89917F
Octal
42310577
Decimal
9,015,679
Country
TW
Tail
B-18123
Type
A21N
No current signal · last broadcast Jul 26, 13:00 UTC
Flights observed
423
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 13:00 UTC

Last known position

Most recent position reported by Mode-S 89917F.

Country allocation

The ICAO 24-bit address 89917F 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
CAL127 China Airlines 46 2026-07-24
CAL126 China Airlines 44 2026-07-24
CAL103 China Airlines 40 2026-07-23
CAL935 China Airlines 35 2026-07-23
CAL102 China Airlines 35 2026-07-23
CAL936 China Airlines 34 2026-07-23
CAL933 China Airlines 27 2026-07-23
CAL934 China Airlines 24 2026-07-24
MDA968 - 14 2026-07-18
MDA967 - 13 2026-07-19
CAL910 China Airlines 6 2026-04-30
CAL837 China Airlines 6 2026-04-27
CAL851 China Airlines 5 2026-04-15
CAL838 China Airlines 5 2026-04-27
CAL113 China Airlines 5 2026-05-03
CAL528 China Airlines 4 2026-04-27
CAL517 China Airlines 4 2026-05-02
CAL112 China Airlines 4 2026-05-03
CAL915 China Airlines 3 2026-07-26
CAL909 China Airlines 3 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CAL916 HKG → TPE Jul 26, 11:20 UTCJul 26, 13:00 UTC1h 40m
2026-07-26 CAL915 TPE → HKG Jul 26, 08:05 UTCJul 26, 09:30 UTC1h 25m
2026-07-25 CAL916 HKG → TPE Jul 25, 11:45 UTCJul 25, 13:15 UTC1h 30m
2026-07-25 CAL915 TPE → HKG Jul 25, 09:35 UTCJul 25, 09:50 UTC15m
2026-07-25 CAL915 TPE → HKG Jul 25, 06:55 UTCJul 25, 08:05 UTC1h 10m
2026-07-24 CAL7842 KHH → TPE Jul 24, 15:05 UTCJul 24, 15:55 UTC50m
2026-07-24 CAL127 NRT → KHH Jul 24, 10:15 UTCJul 24, 13:40 UTC3h 25m
2026-07-24 CAL126 KHH → NRT Jul 24, 05:10 UTCJul 24, 08:30 UTC3h 20m
2026-07-24 CAL934 HKG → KHH Jul 24, 02:30 UTCJul 24, 03:35 UTC1h 5m
2026-07-23 CAL933 KHH → HKG Jul 23, 23:40 UTCJul 24, 00:45 UTC1h 5m
2026-07-23 CAL936 HKG → KHH Jul 23, 13:00 UTCJul 23, 14:05 UTC1h 5m
2026-07-23 CAL935 KHH → HKG Jul 23, 10:05 UTCJul 23, 11:00 UTC55m
2026-07-23 CAL103 NRT → KHH Jul 23, 05:00 UTCJul 23, 08:30 UTC3h 30m
2026-07-23 CAL102 KHH → NRT Jul 23, 00:00 UTCJul 23, 03:20 UTC3h 20m
2026-07-22 CAL127 NRT → KHH Jul 22, 12:05 UTCJul 22, 13:35 UTC1h 30m
2026-07-22 CAL126 KHH → NRT Jul 22, 05:10 UTCJul 22, 05:25 UTC15m
2026-07-22 CAL934 HKG → KHH Jul 22, 02:30 UTCJul 22, 03:35 UTC1h 5m
2026-07-21 CAL933 KHH → HKG Jul 21, 23:50 UTCJul 22, 00:55 UTC1h 5m
2026-07-21 CAL127 NRT → KHH Jul 21, 10:00 UTCJul 21, 13:25 UTC3h 25m
2026-07-21 CAL126 KHH → NRT Jul 21, 05:10 UTCJul 21, 08:25 UTC3h 15m
2026-07-21 CAL934 HKG → KHH Jul 21, 02:40 UTCJul 21, 03:45 UTC1h 5m
2026-07-20 CAL933 KHH → HKG Jul 20, 23:40 UTCJul 21, 00:45 UTC1h 5m
2026-07-20 CAL127 NRT → KHH Jul 20, 10:35 UTCJul 20, 13:55 UTC3h 20m
2026-07-20 CAL126 KHH → NRT Jul 20, 05:45 UTCJul 20, 09:00 UTC3h 15m
2026-07-19 MDA967 KHH → KHH Jul 19, 23:45 UTCJul 20, 04:10 UTC4h 25m
2026-07-19 CAL936 HKG → KHH Jul 19, 13:35 UTCJul 19, 14:40 UTC1h 5m
2026-07-19 CAL935 KHH → HKG Jul 19, 10:45 UTCJul 19, 11:55 UTC1h 10m
2026-07-19 CAL103 NRT → KHH Jul 19, 05:00 UTCJul 19, 08:20 UTC3h 20m
2026-07-19 CAL102 KHH → NRT Jul 19, 00:00 UTCJul 19, 03:20 UTC3h 20m
2026-07-18 CAL127 NRT → KHH Jul 18, 10:15 UTCJul 18, 13:25 UTC3h 10m
2026-07-18 CAL126 KHH → NRT Jul 18, 05:20 UTCJul 18, 08:40 UTC3h 20m
2026-07-18 MDA968 - Jul 18, 00:00 UTCJul 18, 03:55 UTC3h 56m
2026-07-17 MDA967 KHH → KHH Jul 17, 23:45 UTCJul 17, 23:50 UTC5m
2026-07-17 CAL127 - Jul 17, 10:40 UTCJul 17, 13:45 UTC3h 5m
2026-07-17 CAL126 KHH → NRT Jul 17, 05:35 UTCJul 17, 09:04 UTC3h 30m
2026-07-17 CAL934 HKG → KHH Jul 17, 02:45 UTCJul 17, 04:04 UTC1h 20m
2026-07-16 CAL933 KHH → HKG Jul 16, 23:40 UTCJul 17, 00:45 UTC1h 5m
2026-07-16 CAL127 - Jul 16, 10:59 UTCJul 16, 14:05 UTC3h 5m
2026-07-16 CAL126 KHH → NRT Jul 16, 06:10 UTCJul 16, 09:35 UTC3h 25m
2026-07-15 MDA967 KHH → KHH Jul 15, 23:50 UTCJul 16, 04:35 UTC4h 45m
2026-07-15 CAL127 - Jul 15, 13:10 UTCJul 15, 13:40 UTC30m
2026-07-15 CAL127 - Jul 15, 10:20 UTCJul 15, 12:30 UTC2h 10m
2026-07-15 CAL126 KHH → NRT Jul 15, 05:15 UTCJul 15, 08:40 UTC3h 25m
2026-07-15 CAL934 HKG → KHH Jul 15, 02:40 UTCJul 15, 03:45 UTC1h 5m
2026-07-14 CAL933 KHH → HKG Jul 14, 23:35 UTCJul 15, 00:40 UTC1h 5m
2026-07-14 CAL177 KIX → KHH Jul 14, 11:45 UTCJul 14, 14:20 UTC2h 35m
2026-07-14 CAL176 KHH → KIX Jul 14, 07:40 UTCJul 14, 10:15 UTC2h 35m
2026-07-14 CAL165 ICN → KHH Jul 14, 03:30 UTCJul 14, 05:55 UTC2h 25m
2026-07-13 CAL164 KHH → ICN Jul 13, 23:30 UTCJul 14, 02:05 UTC2h 35m
2026-07-13 CAL127 NRT → KHH Jul 13, 10:25 UTCJul 13, 13:40 UTC3h 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-18123 page for operator, model, and routing details .

Mode-S 89917F frequently asked

What is Mode-S code 89917F?
89917F is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-18123.
Where is Mode-S 89917F registered?
Mode-S code 89917F is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 89917F broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 13:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 89917F, octal 42310577, decimal 9,015,679.
What flights does 89917F operate?
Mode-S 89917F has broadcast 20 distinct callsigns, including CAL127, CAL126, CAL103, CAL935, CAL102.