Apparatus

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sensors Mode-S transponder

899057

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-50021 · AIRBUS A-320neo

Hex
899057
Octal
42310127
Decimal
9,015,383
Country
TW
Tail
B-50021
Type
A20N
No current signal · last broadcast 1d ago
Flights observed
354
Distinct callsigns
20
Country
TW
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 899057.

Country allocation

The ICAO 24-bit address 899057 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
TTW235 - 15 2026-06-25
TTW215 - 15 2026-06-22
TTW602 - 14 2026-06-30
TTW241 - 14 2026-07-04
TTW603 - 13 2026-06-30
TTW214 - 11 2026-06-22
TTW752 - 10 2026-07-10
TTW607 - 10 2026-07-09
TTW240 Tigerair Taiwan 10 2026-07-04
TTW234 - 10 2026-06-24
TTW237 - 9 2026-07-08
TTW213 Tigerair Taiwan 9 2026-06-09
TTW753 - 8 2026-07-12
TTW737 - 8 2026-06-30
TTW736 - 8 2026-06-29
TTW552 - 8 2026-07-07
TTW721 - 7 2026-06-29
TTW720 - 7 2026-06-29
TTW606 - 7 2026-07-09
TTW585 - 7 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 TTW256 TPE → TPE Jul 12, 06:50 UTCJul 12, 14:45 UTC7h 55m
2026-07-12 TTW753 - Jul 12, 02:10 UTCJul 12, 04:55 UTC2h 45m
2026-07-10 TTW752 - Jul 10, 05:15 UTCJul 10, 08:05 UTC2h 50m
2026-07-10 TTW743 - Jul 10, 03:10 UTCJul 10, 03:40 UTC30m
2026-07-09 TTW742 - Jul 9, 22:35 UTCJul 9, 23:20 UTC45m
2026-07-09 TTW607 - Jul 9, 14:50 UTCJul 9, 15:15 UTC25m
2026-07-09 TTW607 - Jul 9, 13:10 UTCJul 9, 13:30 UTC20m
2026-07-09 TTW606 - Jul 9, 11:05 UTCJul 9, 11:45 UTC40m
2026-07-09 TTW606 - Jul 9, 09:40 UTCJul 9, 10:10 UTC30m
2026-07-09 TTW257 - Jul 9, 01:35 UTCJul 9, 08:15 UTC6h 40m
2026-07-09 TTW256 - Jul 9, 00:50 UTCJul 9, 01:05 UTC15m
2026-07-08 TTW607 PUS → TPE Jul 8, 12:25 UTCJul 8, 14:25 UTC2h 0m
2026-07-08 TTW606 - Jul 8, 10:45 UTCJul 8, 11:05 UTC20m
2026-07-08 TTW606 - Jul 8, 09:15 UTCJul 8, 09:40 UTC25m
2026-07-08 TTW237 - Jul 8, 07:15 UTCJul 8, 07:45 UTC30m
2026-07-08 TTW237 - Jul 8, 04:10 UTCJul 8, 06:40 UTC2h 30m
2026-07-07 TTW236 TPE → HKD Jul 7, 23:20 UTCJul 8, 02:45 UTC3h 25m
2026-07-07 TTW552 KHH → TPE Jul 7, 09:45 UTCJul 7, 15:35 UTC5h 50m
2026-07-07 TTW281 NRT → KHH Jul 7, 05:10 UTCJul 7, 08:30 UTC3h 20m
2026-07-07 TTW280 KHH → NRT Jul 7, 00:25 UTCJul 7, 03:45 UTC3h 20m
2026-07-06 TTW269 - Jul 6, 11:20 UTCJul 6, 14:10 UTC2h 50m
2026-07-06 TTW268 - Jul 6, 07:15 UTCJul 6, 09:45 UTC2h 30m
2026-07-06 TTW285 - Jul 6, 03:15 UTCJul 6, 06:00 UTC2h 45m
2026-07-05 TTW284 KHH → KIX Jul 5, 23:00 UTCJul 6, 01:35 UTC2h 35m
2026-07-05 TTW585 KHH → KHH Jul 5, 08:10 UTCJul 5, 13:20 UTC5h 10m
2026-07-05 TTW285 KIX → KHH Jul 5, 02:55 UTCJul 5, 05:40 UTC2h 45m
2026-07-04 TTW210 TPE → KIX Jul 4, 22:55 UTCJul 5, 01:05 UTC2h 10m
2026-07-04 TTW503 TPE → TPE Jul 4, 06:15 UTCJul 4, 15:15 UTC9h 0m
2026-07-04 TTW241 - Jul 4, 04:00 UTCJul 4, 04:30 UTC30m
2026-07-04 TTW241 - Jul 4, 02:30 UTCJul 4, 02:55 UTC25m
2026-07-04 TTW240 TPE → FUK Jul 4, 00:35 UTCJul 4, 00:50 UTC15m
2026-07-03 TTW240 TPE → FUK Jul 3, 23:00 UTCJul 3, 23:50 UTC50m
2026-07-03 TTW552 TPE → TPE Jul 3, 09:35 UTCJul 3, 15:20 UTC5h 45m
2026-07-03 TTW201 - Jul 3, 04:50 UTCJul 3, 07:45 UTC2h 55m
2026-07-03 TTW280 - Jul 3, 00:10 UTCJul 3, 03:15 UTC3h 5m
2026-07-02 TTW261 - Jul 2, 04:20 UTCJul 2, 08:30 UTC4h 10m
2026-07-01 TTW260 - Jul 1, 23:15 UTCJul 2, 02:55 UTC3h 40m
2026-07-01 TTW585 KHH → KHH Jul 1, 08:30 UTCJul 1, 13:35 UTC5h 5m
2026-07-01 TTW281 NRT → KHH Jul 1, 03:10 UTCJul 1, 06:45 UTC3h 35m
2026-07-01 TTW200 TPE → NRT Jul 1, 00:15 UTCJul 1, 01:25 UTC1h 10m
2026-06-30 TTW200 TPE → NRT Jun 30, 22:40 UTCJun 30, 22:55 UTC15m
2026-06-30 TTW603 ICN → TPE Jun 30, 15:45 UTCJun 30, 17:55 UTC2h 10m
2026-06-30 TTW602 - Jun 30, 12:25 UTCJun 30, 14:30 UTC2h 5m
2026-06-30 TTW753 - Jun 30, 07:25 UTCJun 30, 10:30 UTC3h 5m
2026-06-30 TTW752 - Jun 30, 02:55 UTCJun 30, 05:35 UTC2h 40m
2026-06-30 TTW737 - Jun 30, 00:49 UTCJun 30, 01:14 UTC25m
2026-06-29 TTW736 - Jun 29, 22:44 UTCJun 29, 23:05 UTC20m
2026-06-29 TTW603 ICN → TPE Jun 29, 15:34 UTCJun 29, 17:49 UTC2h 15m
2026-06-29 TTW602 TPE → ICN Jun 29, 12:20 UTCJun 29, 14:14 UTC1h 55m
2026-06-29 TTW721 - Jun 29, 10:20 UTCJun 29, 10:50 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-50021 page for operator, model, and routing details .

Mode-S 899057 frequently asked

What is Mode-S code 899057?
899057 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-50021.
Where is Mode-S 899057 registered?
Mode-S code 899057 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 899057 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 899057, octal 42310127, decimal 9,015,383.
What flights does 899057 operate?
Mode-S 899057 has broadcast 20 distinct callsigns, including TTW235, TTW215, TTW602, TTW241, TTW603.