Apparatus

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sensors Mode-S transponder

899051

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-18666

Hex
899051
Octal
42310121
Decimal
9,015,377
Country
TW
Tail
B-18666
Type
B738
No current signal · last broadcast Jul 26, 14:20 UTC
Flights observed
691
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 14:20 UTC

Last known position

Most recent position reported by Mode-S 899051.

Country allocation

The ICAO 24-bit address 899051 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
MDA1261 Mandarin Airlines 30 2026-07-23
MDA1262 Mandarin Airlines 27 2026-07-24
MDA1278 Mandarin Airlines 23 2026-07-24
MDA1277 Mandarin Airlines 23 2026-07-24
MDA371 Mandarin Airlines 22 2026-07-24
MDA7901 Mandarin Airlines 21 2026-07-24
MDA372 Mandarin Airlines 21 2026-07-24
MDA7902 Mandarin Airlines 20 2026-07-24
MDA310 Mandarin Airlines 11 2026-07-20
MDA334 Mandarin Airlines 10 2026-07-21
MDA333 Mandarin Airlines 10 2026-07-21
MDA385 Mandarin Airlines 9 2026-07-26
MDA376 Mandarin Airlines 9 2026-07-26
MDA341 - 9 2026-07-14
MDA338 - 9 2026-07-14
MDA309 - 9 2026-07-14
MDA386 Mandarin Airlines 8 2026-07-26
MDA375 Mandarin Airlines 8 2026-07-26
MDA367 - 8 2026-07-14
MDA342 - 8 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 MDA386 MZG → TSA Jul 26, 13:30 UTCJul 26, 14:20 UTC50m
2026-07-26 MDA385 TSA → MZG Jul 26, 11:55 UTCJul 26, 12:45 UTC50m
2026-07-26 MDA376 MZG → TSA Jul 26, 09:55 UTCJul 26, 10:40 UTC45m
2026-07-26 MDA375 TSA → MZG Jul 26, 08:10 UTCJul 26, 09:00 UTC50m
2026-07-26 MDA1270 KNH → TSA Jul 26, 06:20 UTCJul 26, 07:10 UTC51m
2026-07-26 MDA1269 TSA → KNH Jul 26, 04:10 UTCJul 26, 05:00 UTC50m
2026-07-26 MDA1264 KNH → TSA Jul 26, 02:30 UTCJul 26, 03:20 UTC50m
2026-07-26 MDA1263 TSA → KNH Jul 26, 00:25 UTCJul 26, 01:15 UTC50m
2026-07-25 MDA1280 KNH → TSA Jul 25, 12:45 UTCJul 25, 13:25 UTC40m
2026-07-25 MDA1279 TSA → KNH Jul 25, 10:45 UTCJul 25, 11:30 UTC45m
2026-07-25 MDA374 MZG → TSA Jul 25, 09:05 UTCJul 25, 09:50 UTC45m
2026-07-25 MDA373 TSA → MZG Jul 25, 07:30 UTCJul 25, 08:20 UTC50m
2026-07-25 MDA370 MZG → TSA Jul 25, 05:35 UTCJul 25, 06:15 UTC40m
2026-07-25 MDA369 TSA → MZG Jul 25, 03:45 UTCJul 25, 04:30 UTC45m
2026-07-25 MDA366 MZG → TSA Jul 25, 01:50 UTCJul 25, 02:35 UTC45m
2026-07-25 MDA365 TSA → MZG Jul 25, 00:15 UTCJul 25, 01:00 UTC45m
2026-07-24 MDA1278 KNH → TSA Jul 24, 12:15 UTCJul 24, 13:00 UTC45m
2026-07-24 MDA1277 TSA → KNH Jul 24, 10:05 UTCJul 24, 10:50 UTC45m
2026-07-24 MDA372 MZG → TSA Jul 24, 07:50 UTCJul 24, 08:35 UTC45m
2026-07-24 MDA371 TSA → MZG Jul 24, 06:10 UTCJul 24, 07:00 UTC50m
2026-07-24 MDA7902 LZN → TSA Jul 24, 04:55 UTCJul 24, 05:15 UTC20m
2026-07-24 MDA7901 TSA → LZN Jul 24, 02:50 UTCJul 24, 03:20 UTC30m
2026-07-24 MDA1262 KNH → TSA Jul 24, 01:10 UTCJul 24, 01:55 UTC45m
2026-07-23 MDA1261 TSA → KNH Jul 23, 22:50 UTCJul 23, 23:45 UTC55m
2026-07-23 MDA1278 KNH → TSA Jul 23, 12:10 UTCJul 23, 12:50 UTC40m
2026-07-23 MDA1277 TSA → KNH Jul 23, 09:55 UTCJul 23, 10:45 UTC50m
2026-07-23 MDA372 MZG → TSA Jul 23, 07:40 UTCJul 23, 08:25 UTC45m
2026-07-23 MDA371 TSA → MZG Jul 23, 06:10 UTCJul 23, 06:55 UTC45m
2026-07-23 MDA7902 LZN → TSA Jul 23, 04:45 UTCJul 23, 05:00 UTC15m
2026-07-23 MDA7901 TSA → LZN Jul 23, 02:45 UTCJul 23, 03:15 UTC30m
2026-07-23 MDA1262 KNH → TSA Jul 23, 01:10 UTCJul 23, 01:55 UTC45m
2026-07-22 MDA1261 TSA → KNH Jul 22, 23:00 UTCJul 22, 23:50 UTC50m
2026-07-22 MDA1278 KNH → TSA Jul 22, 12:10 UTCJul 22, 12:50 UTC40m
2026-07-22 MDA7902 LZN → TSA Jul 22, 04:45 UTCJul 22, 05:05 UTC20m
2026-07-22 MDA7901 TSA → LZN Jul 22, 02:45 UTCJul 22, 03:20 UTC35m
2026-07-22 MDA1262 KNH → TSA Jul 22, 01:10 UTCJul 22, 02:05 UTC55m
2026-07-21 MDA1261 TSA → KNH Jul 21, 23:05 UTCJul 21, 23:50 UTC45m
2026-07-21 MDA378 MZG → TSA Jul 21, 12:45 UTCJul 21, 13:25 UTC40m
2026-07-21 MDA377 TSA → MZG Jul 21, 11:15 UTCJul 21, 12:00 UTC45m
2026-07-21 MDA1274 KNH → TSA Jul 21, 09:50 UTCJul 21, 10:25 UTC35m
2026-07-21 MDA1273 TSA → KNH Jul 21, 07:30 UTCJul 21, 08:20 UTC50m
2026-07-21 MDA368 MZG → TSA Jul 21, 04:55 UTCJul 21, 05:45 UTC50m
2026-07-21 MDA337 KHH → MZG Jul 21, 03:35 UTCJul 21, 04:15 UTC40m
2026-07-21 MDA334 MZG → KHH Jul 21, 02:15 UTCJul 21, 02:40 UTC25m
2026-07-21 MDA333 KHH → MZG Jul 21, 00:55 UTCJul 21, 01:25 UTC30m
2026-07-20 MDA310 KNH → KHH Jul 20, 11:50 UTCJul 20, 12:15 UTC25m
2026-07-20 MDA769 RMQ → KNH Jul 20, 09:20 UTCJul 20, 09:45 UTC25m
2026-07-20 MDA768 KNH → RMQ Jul 20, 08:00 UTCJul 20, 08:25 UTC25m
2026-07-20 MDA767 RMQ → KNH Jul 20, 06:05 UTCJul 20, 06:30 UTC25m
2026-07-20 MDA764 KNH → RMQ Jul 20, 04:50 UTCJul 20, 05:15 UTC25m

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-18666 page for operator, model, and routing details .

Mode-S 899051 frequently asked

What is Mode-S code 899051?
899051 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-18666.
Where is Mode-S 899051 registered?
Mode-S code 899051 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 899051 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 14:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 899051, octal 42310121, decimal 9,015,377.
What flights does 899051 operate?
Mode-S 899051 has broadcast 20 distinct callsigns, including MDA1261, MDA1262, MDA1278, MDA1277, MDA371.