Apparatus

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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 1h ago
Flights observed
207
Distinct callsigns
20
Country
TW
Last broadcast
1h ago

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
CAL103 China Airlines 17 2026-05-30
CAL127 China Airlines 14 2026-05-29
CAL102 China Airlines 14 2026-05-30
CAL936 China Airlines 13 2026-05-28
CAL935 China Airlines 13 2026-05-28
CAL126 China Airlines 13 2026-05-29
CAL934 China Airlines 7 2026-05-29
CAL933 China Airlines 7 2026-05-28
MDA968 - 6 2026-05-25
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
MDA967 - 3 2026-05-24
CAL909 China Airlines 3 2026-04-30
CAL852 China Airlines 3 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CAL103 NRT → KHH May 30, 05:00 UTCMay 30, 07:45 UTC2h 45m
2026-05-30 CAL102 KHH → NRT May 30, 00:00 UTCMay 30, 03:10 UTC3h 10m
2026-05-29 CAL127 NRT → KHH May 29, 10:10 UTCMay 29, 13:50 UTC3h 40m
2026-05-29 CAL126 KHH → NRT May 29, 05:10 UTCMay 29, 08:25 UTC3h 15m
2026-05-29 CAL934 HKG → KHH May 29, 02:25 UTCMay 29, 03:35 UTC1h 10m
2026-05-28 CAL933 KHH → HKG May 28, 23:35 UTCMay 29, 00:35 UTC1h 0m
2026-05-28 CAL936 HKG → KHH May 28, 12:55 UTCMay 28, 14:00 UTC1h 5m
2026-05-28 CAL935 KHH → HKG May 28, 10:10 UTCMay 28, 11:15 UTC1h 5m
2026-05-28 CAL103 NRT → KHH May 28, 05:05 UTCMay 28, 08:35 UTC3h 30m
2026-05-27 CAL102 KHH → NRT May 27, 23:55 UTCMay 28, 03:15 UTC3h 20m
2026-05-27 CAL127 NRT → KHH May 27, 10:05 UTCMay 27, 13:20 UTC3h 15m
2026-05-27 CAL126 KHH → NRT May 27, 05:04 UTCMay 27, 08:25 UTC3h 21m
2026-05-27 CAL934 HKG → KHH May 27, 02:19 UTCMay 27, 03:29 UTC1h 10m
2026-05-26 CAL933 KHH → HKG May 26, 23:35 UTCMay 27, 00:39 UTC1h 5m
2026-05-26 CAL936 HKG → KHH May 26, 13:15 UTCMay 26, 14:20 UTC1h 5m
2026-05-26 CAL935 KHH → HKG May 26, 10:14 UTCMay 26, 11:20 UTC1h 5m
2026-05-26 CAL103 NRT → KHH May 26, 08:04 UTCMay 26, 08:30 UTC25m
2026-05-26 CAL103 NRT → KHH May 26, 05:05 UTCMay 26, 06:20 UTC1h 15m
2026-05-25 CAL102 KHH → NRT May 25, 23:54 UTCMay 26, 03:15 UTC3h 20m
2026-05-25 CAL127 NRT → KHH May 25, 10:15 UTCMay 25, 13:30 UTC3h 15m
2026-05-25 CAL126 KHH → NRT May 25, 05:05 UTCMay 25, 08:30 UTC3h 25m
2026-05-25 MDA968 - May 25, 02:45 UTCMay 25, 03:15 UTC30m
2026-05-24 MDA967 - May 24, 23:40 UTCMay 24, 23:46 UTC6m
2026-05-24 CAL936 HKG → KHH May 24, 13:00 UTCMay 24, 14:00 UTC1h 0m
2026-05-24 CAL935 KHH → HKG May 24, 10:05 UTCMay 24, 11:25 UTC1h 20m
2026-05-24 CAL103 NRT → KHH May 24, 08:10 UTCMay 24, 08:35 UTC25m
2026-05-24 CAL103 NRT → KHH May 24, 05:00 UTCMay 24, 06:20 UTC1h 20m
2026-05-24 CAL102 KHH → NRT May 24, 00:00 UTCMay 24, 03:15 UTC3h 15m
2026-05-23 CAL127 NRT → KHH May 23, 09:55 UTCMay 23, 13:30 UTC3h 35m
2026-05-23 CAL126 KHH → NRT May 23, 05:10 UTCMay 23, 08:20 UTC3h 10m
2026-05-23 MDA968 - May 23, 03:00 UTCMay 23, 03:55 UTC55m
2026-05-22 MDA967 - May 22, 23:40 UTCMay 23, 00:00 UTC20m
2026-05-22 CAL936 HKG → KHH May 22, 13:10 UTCMay 22, 14:15 UTC1h 5m
2026-05-22 CAL935 KHH → HKG May 22, 10:10 UTCMay 22, 11:20 UTC1h 10m
2026-05-22 CAL103 NRT → KHH May 22, 05:20 UTCMay 22, 08:45 UTC3h 25m
2026-05-21 CAL102 KHH → NRT May 21, 23:55 UTCMay 22, 03:00 UTC3h 5m
2026-05-21 CAL127 NRT → KHH May 21, 10:10 UTCMay 21, 13:50 UTC3h 40m
2026-05-21 CAL126 KHH → NRT May 21, 05:20 UTCMay 21, 08:25 UTC3h 5m
2026-05-20 MDA968 KHH → KHH May 20, 23:30 UTCMay 21, 03:45 UTC4h 15m
2026-05-20 CAL936 HKG → KHH May 20, 13:05 UTCMay 20, 14:10 UTC1h 5m
2026-05-20 CAL935 KHH → HKG May 20, 10:10 UTCMay 20, 11:25 UTC1h 15m
2026-05-20 CAL103 NRT → KHH May 20, 05:05 UTCMay 20, 08:45 UTC3h 40m
2026-05-20 CAL102 KHH → NRT May 20, 00:10 UTCMay 20, 03:30 UTC3h 20m
2026-05-19 CAL127 NRT → KHH May 19, 10:20 UTCMay 19, 13:40 UTC3h 20m
2026-05-19 CAL126 KHH → NRT May 19, 05:25 UTCMay 19, 08:40 UTC3h 15m
2026-05-19 CAL934 HKG → KHH May 19, 02:50 UTCMay 19, 04:00 UTC1h 10m
2026-05-18 CAL933 KHH → HKG May 18, 23:45 UTCMay 19, 00:50 UTC1h 5m
2026-05-18 CAL936 HKG → KHH May 18, 12:55 UTCMay 18, 14:00 UTC1h 5m
2026-05-18 CAL935 KHH → HKG May 18, 10:05 UTCMay 18, 11:20 UTC1h 15m
2026-05-18 CAL103 NRT → KHH May 18, 04:55 UTCMay 18, 08:10 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 1h ago.
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 CAL103, CAL127, CAL102, CAL936, CAL935.