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sensors Mode-S transponder

89905C

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-50027 · AIRBUS A-321neo

Hex
89905C
Octal
42310134
Decimal
9,015,388
Country
TW
Tail
B-50027
Type
A21N
No current signal · last broadcast Jul 25, 14:45 UTC
Flights observed
355
Distinct callsigns
20
Country
TW
Last broadcast
Jul 25, 14:45 UTC

Last known position

Most recent position reported by Mode-S 89905C.

Country allocation

The ICAO 24-bit address 89905C 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
TTW281 Tigerair Taiwan 21 2026-07-25
TTW280 Tigerair Taiwan 15 2026-07-20
TTW200 Tigerair Taiwan 15 2026-07-25
TTW552 Tigerair Taiwan 11 2026-07-25
TTW585 - 10 2026-06-21
TTW261 - 10 2026-07-09
TTW235 Tigerair Taiwan 10 2026-07-24
TTW201 Tigerair Taiwan 9 2026-07-20
TTW270 Tigerair Taiwan 8 2026-07-19
TTW662 - 7 2026-07-18
TTW271 - 7 2026-07-19
TTW260 - 7 2026-07-08
TTW237 Tigerair Taiwan 7 2026-07-23
TTW234 Tigerair Taiwan 7 2026-07-23
TTW233 - 7 2026-07-20
TTW213 Tigerair Taiwan 7 2026-07-24
TTW663 - 6 2026-07-18
TTW285 - 6 2026-06-21
TTW263 - 6 2026-07-08
TTW262 - 6 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 TTW552 DAD → TPE Jul 25, 08:40 UTCJul 25, 14:45 UTC6h 5m
2026-07-25 TTW281 NRT → KHH Jul 25, 03:15 UTCJul 25, 06:40 UTC3h 25m
2026-07-25 TTW200 TPE → NRT Jul 25, 00:25 UTCJul 25, 01:40 UTC1h 15m
2026-07-24 TTW200 TPE → NRT Jul 24, 22:50 UTCJul 24, 23:05 UTC15m
2026-07-24 TTW213 KIX → TPE Jul 24, 14:45 UTCJul 24, 15:30 UTC45m
2026-07-24 TTW213 KIX → TPE Jul 24, 12:40 UTCJul 24, 13:25 UTC45m
2026-07-24 TTW212 TPE → KIX Jul 24, 10:30 UTCJul 24, 11:10 UTC40m
2026-07-24 TTW212 TPE → KIX Jul 24, 09:00 UTCJul 24, 09:15 UTC15m
2026-07-24 TTW235 CTS → TPE Jul 24, 03:30 UTCJul 24, 07:15 UTC3h 45m
2026-07-23 TTW234 TPE → CTS Jul 23, 22:35 UTCJul 24, 02:05 UTC3h 30m
2026-07-23 TTW607 PUS → TPE Jul 23, 12:55 UTCJul 23, 14:55 UTC2h 0m
2026-07-23 TTW606 TPE → PUS Jul 23, 10:40 UTCJul 23, 11:20 UTC40m
2026-07-23 TTW606 TPE → PUS Jul 23, 09:15 UTCJul 23, 09:40 UTC25m
2026-07-23 TTW237 HKD → TPE Jul 23, 07:20 UTCJul 23, 07:45 UTC25m
2026-07-23 TTW237 HKD → TPE Jul 23, 04:20 UTCJul 23, 06:10 UTC1h 50m
2026-07-22 TTW236 TPE → HKD Jul 22, 23:15 UTCJul 23, 02:45 UTC3h 30m
2026-07-22 TTW209 NGO → TPE Jul 22, 15:10 UTCJul 22, 15:25 UTC15m
2026-07-22 TTW209 NGO → TPE Jul 22, 13:05 UTCJul 22, 13:50 UTC45m
2026-07-22 TTW778 - Jul 22, 11:20 UTCJul 22, 11:35 UTC15m
2026-07-22 TTW779 NGO → RMQ Jul 22, 05:10 UTCJul 22, 05:25 UTC15m
2026-07-22 TTW206 TPE → NGO Jul 22, 02:05 UTCJul 22, 03:45 UTC1h 40m
2026-07-22 TTW206 TPE → NGO Jul 22, 01:20 UTCJul 22, 01:30 UTC10m
2026-07-21 TTW217 HND → TPE Jul 21, 20:50 UTCJul 21, 23:35 UTC2h 45m
2026-07-21 TTW216 TPE → HND Jul 21, 16:25 UTCJul 21, 19:10 UTC2h 45m
2026-07-21 TTW213 KIX → TPE Jul 21, 13:15 UTCJul 21, 13:35 UTC20m
2026-07-21 TTW213 KIX → TPE Jul 21, 11:10 UTCJul 21, 12:40 UTC1h 30m
2026-07-21 TTW212 TPE → KIX Jul 21, 07:25 UTCJul 21, 09:50 UTC2h 25m
2026-07-20 TTW233 - Jul 20, 13:00 UTCJul 20, 14:00 UTC1h 0m
2026-07-20 TTW232 - Jul 20, 10:40 UTCJul 20, 11:05 UTC25m
2026-07-20 TTW201 NRT → TPE Jul 20, 05:05 UTCJul 20, 08:00 UTC2h 55m
2026-07-20 TTW280 KHH → NRT Jul 20, 00:10 UTCJul 20, 03:35 UTC3h 25m
2026-07-19 TTW271 - Jul 19, 10:05 UTCJul 19, 12:20 UTC2h 15m
2026-07-19 TTW270 KHH → FUK Jul 19, 08:15 UTCJul 19, 08:30 UTC15m
2026-07-19 TTW270 KHH → FUK Jul 19, 06:35 UTCJul 19, 07:20 UTC45m
2026-07-18 TTW663 - Jul 18, 11:50 UTCJul 18, 14:10 UTC2h 20m
2026-07-18 TTW662 KHH → GMP Jul 18, 08:05 UTCJul 18, 10:30 UTC2h 25m
2026-07-18 TTW289 - Jul 18, 06:05 UTCJul 18, 06:30 UTC25m
2026-07-18 TTW288 - Jul 18, 02:14 UTCJul 18, 02:29 UTC15m
2026-07-17 TTW767 - Jul 17, 12:30 UTCJul 17, 13:15 UTC45m
2026-07-17 TTW794 - Jul 17, 08:15 UTCJul 17, 08:54 UTC40m
2026-07-17 TTW795 - Jul 17, 05:39 UTCJul 17, 06:25 UTC45m
2026-07-17 TTW766 - Jul 17, 01:05 UTCJul 17, 01:49 UTC45m
2026-07-16 TTW551 TPE → KHH Jul 16, 09:10 UTCJul 16, 14:35 UTC5h 25m
2026-07-16 TTW235 - Jul 16, 07:20 UTCJul 16, 07:35 UTC15m
2026-07-16 TTW235 - Jul 16, 03:55 UTCJul 16, 06:00 UTC2h 5m
2026-07-15 TTW234 - Jul 15, 22:50 UTCJul 16, 02:20 UTC3h 30m
2026-07-15 TTW213 - Jul 15, 14:25 UTCJul 15, 14:45 UTC20m
2026-07-15 TTW213 - Jul 15, 12:30 UTCJul 15, 13:05 UTC35m
2026-07-15 TTW212 TPE → KIX Jul 15, 08:50 UTCJul 15, 11:20 UTC2h 30m
2026-07-15 TTW235 - Jul 15, 06:50 UTCJul 15, 07:05 UTC15m

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-50027 page for operator, model, and routing details .

Mode-S 89905C frequently asked

What is Mode-S code 89905C?
89905C is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-50027.
Where is Mode-S 89905C registered?
Mode-S code 89905C is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 89905C broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 14:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 89905C, octal 42310134, decimal 9,015,388.
What flights does 89905C operate?
Mode-S 89905C has broadcast 20 distinct callsigns, including TTW281, TTW280, TTW200, TTW552, TTW585.