Apparatus

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sensors Mode-S transponder

899023

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-50001 · AIRBUS A-320

Hex
899023
Octal
42310043
Decimal
9,015,331
Country
TW
Tail
B-50001
Type
A320
No current signal · last broadcast Jul 26, 07:45 UTC
Flights observed
412
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 07:45 UTC

Last known position

Most recent position reported by Mode-S 899023.

Country allocation

The ICAO 24-bit address 899023 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
TTW241 Tigerair Taiwan 23 2026-07-23
TTW240 Tigerair Taiwan 17 2026-07-23
TTW215 Tigerair Taiwan 14 2026-07-25
TTW214 Tigerair Taiwan 11 2026-07-25
TTW211 - 11 2026-06-26
TTW721 - 10 2026-07-07
TTW201 Tigerair Taiwan 10 2026-07-19
TTW230 - 9 2026-07-19
TTW217 Tigerair Taiwan 9 2026-07-20
TTW200 - 9 2026-07-18
TTW606 Tigerair Taiwan 8 2026-07-24
TTW233 - 8 2026-07-18
TTW231 Tigerair Taiwan 8 2026-07-20
TTW229 - 8 2026-07-13
TTW607 Tigerair Taiwan 7 2026-07-24
TTW255 Tigerair Taiwan 7 2026-07-23
TTW216 - 7 2026-07-20
TTW206 - 7 2026-07-18
TTW720 - 6 2026-07-07
TTW707 - 6 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TTW237 HKD → TPE Jul 26, 04:15 UTCJul 26, 07:45 UTC3h 31m
2026-07-25 TTW236 TPE → HKD Jul 25, 23:30 UTCJul 26, 02:55 UTC3h 25m
2026-07-25 TTW215 OKJ → TPE Jul 25, 09:25 UTCJul 25, 09:55 UTC30m
2026-07-25 TTW215 OKJ → TPE Jul 25, 07:35 UTCJul 25, 08:10 UTC35m
2026-07-25 TTW214 TPE → OKJ Jul 25, 04:00 UTCJul 25, 06:00 UTC2h 0m
2026-07-25 TTW737 ISG → TPE Jul 25, 00:55 UTCJul 25, 01:20 UTC25m
2026-07-24 TTW736 TPE → ISG Jul 24, 22:50 UTCJul 24, 23:10 UTC20m
2026-07-24 TTW607 PUS → TPE Jul 24, 14:25 UTCJul 24, 15:10 UTC45m
2026-07-24 TTW607 PUS → TPE Jul 24, 12:35 UTCJul 24, 12:50 UTC15m
2026-07-24 TTW606 TPE → PUS Jul 24, 10:55 UTCJul 24, 11:15 UTC20m
2026-07-24 TTW606 TPE → PUS Jul 24, 09:20 UTCJul 24, 09:45 UTC25m
2026-07-23 TTW255 SDJ → TPE Jul 23, 13:30 UTCJul 23, 13:50 UTC20m
2026-07-23 TTW255 SDJ → TPE Jul 23, 10:45 UTCJul 23, 12:25 UTC1h 40m
2026-07-23 TTW254 TPE → SDJ Jul 23, 06:10 UTCJul 23, 09:05 UTC2h 55m
2026-07-23 TTW241 FUK → TPE Jul 23, 03:20 UTCJul 23, 03:35 UTC15m
2026-07-23 TTW241 FUK → TPE Jul 23, 01:45 UTCJul 23, 02:00 UTC15m
2026-07-23 TTW240 TPE → FUK Jul 23, 00:00 UTCJul 23, 00:15 UTC15m
2026-07-22 TTW240 TPE → FUK Jul 22, 22:30 UTCJul 22, 22:45 UTC15m
2026-07-22 TTW607 - Jul 22, 13:30 UTCJul 22, 14:05 UTC35m
2026-07-22 TTW607 - Jul 22, 12:00 UTCJul 22, 12:25 UTC25m
2026-07-22 TTW250 TPE → KCZ Jul 22, 00:55 UTCJul 22, 01:40 UTC45m
2026-07-21 TTW753 FKS → TPE Jul 21, 10:45 UTCJul 21, 11:00 UTC15m
2026-07-21 TTW753 FKS → TPE Jul 21, 08:05 UTCJul 21, 09:30 UTC1h 25m
2026-07-21 TTW752 TPE → FKS Jul 21, 04:35 UTCJul 21, 05:50 UTC1h 15m
2026-07-21 TTW752 TPE → FKS Jul 21, 03:05 UTCJul 21, 03:15 UTC10m
2026-07-20 TTW217 HND → TPE Jul 20, 23:45 UTCJul 21, 00:00 UTC15m
2026-07-20 TTW217 HND → TPE Jul 20, 21:10 UTCJul 20, 22:30 UTC1h 20m
2026-07-20 TTW216 TPE → HND Jul 20, 16:35 UTCJul 20, 19:20 UTC2h 45m
2026-07-20 TTW215 OKJ → TPE Jul 20, 07:55 UTCJul 20, 10:05 UTC2h 10m
2026-07-20 TTW214 TPE → OKJ Jul 20, 04:25 UTCJul 20, 06:25 UTC2h 0m
2026-07-20 TTW231 OKA → TPE Jul 20, 02:30 UTCJul 20, 02:50 UTC20m
2026-07-19 TTW230 - Jul 19, 23:20 UTCJul 19, 23:40 UTC20m
2026-07-19 TTW707 - Jul 19, 14:30 UTCJul 19, 15:00 UTC30m
2026-07-19 TTW707 - Jul 19, 12:35 UTCJul 19, 13:25 UTC50m
2026-07-19 TTW706 - Jul 19, 08:45 UTCJul 19, 11:05 UTC2h 20m
2026-07-19 TTW201 NRT → TPE Jul 19, 05:45 UTCJul 19, 06:10 UTC25m
2026-07-19 TTW201 NRT → TPE Jul 19, 03:15 UTCJul 19, 04:35 UTC1h 20m
2026-07-18 TTW200 TPE → NRT Jul 18, 22:50 UTCJul 19, 01:50 UTC3h 0m
2026-07-18 TTW233 - Jul 18, 14:20 UTCJul 18, 14:40 UTC20m
2026-07-18 TTW232 - Jul 18, 10:45 UTCJul 18, 11:05 UTC20m
2026-07-18 TTW207 - Jul 18, 07:50 UTCJul 18, 08:00 UTC10m
2026-07-18 TTW207 - Jul 18, 05:45 UTCJul 18, 06:35 UTC50m
2026-07-18 TTW206 - Jul 18, 03:30 UTCJul 18, 04:25 UTC55m
2026-07-18 TTW206 - Jul 18, 02:00 UTCJul 18, 02:09 UTC10m
2026-07-17 TTW217 HND → TPE Jul 17, 23:50 UTCJul 18, 00:04 UTC15m
2026-07-17 TTW217 HND → TPE Jul 17, 21:25 UTCJul 17, 22:40 UTC1h 15m
2026-07-17 TTW216 TPE → HND Jul 17, 16:44 UTCJul 17, 19:45 UTC3h 0m
2026-07-17 TTW725 - Jul 17, 09:45 UTCJul 17, 11:45 UTC2h 0m
2026-07-17 TTW724 - Jul 17, 06:10 UTCJul 17, 08:20 UTC2h 10m
2026-07-17 TTW743 KMI → TPE Jul 17, 03:45 UTCJul 17, 04:14 UTC30m

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-50001 page for operator, model, and routing details .

Mode-S 899023 frequently asked

What is Mode-S code 899023?
899023 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-50001.
Where is Mode-S 899023 registered?
Mode-S code 899023 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 899023 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 07:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 899023, octal 42310043, decimal 9,015,331.
What flights does 899023 operate?
Mode-S 899023 has broadcast 20 distinct callsigns, including TTW241, TTW240, TTW215, TTW214, TTW211.