Apparatus

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sensors Mode-S transponder

8990F1

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-16821 · ATR-72-600

Hex
8990F1
Octal
42310361
Decimal
9,015,537
Country
TW
Tail
B-16821
Type
AT76
No current signal · last broadcast Jul 26, 12:40 UTC
Flights observed
800
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 12:40 UTC

Last known position

Most recent position reported by Mode-S 8990F1.

Country allocation

The ICAO 24-bit address 8990F1 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
MDA376 Mandarin Airlines 16 2026-07-21
MDA2368 - 16 2026-07-18
MDA1270 Mandarin Airlines 16 2026-07-21
MDA375 Mandarin Airlines 15 2026-07-21
MDA2367 - 15 2026-07-18
MDA2362 - 15 2026-07-18
MDA2361 - 15 2026-07-03
MDA1269 Mandarin Airlines 14 2026-07-21
MDA1264 Mandarin Airlines 13 2026-07-21
MDA1263 Mandarin Airlines 13 2026-07-21
MDA396 Mandarin Airlines 12 2026-07-26
MDA395 Mandarin Airlines 12 2026-07-26
MDA2372 Mandarin Airlines 12 2026-07-23
MDA780 - 11 2026-07-15
MDA779 - 11 2026-07-15
MDA392 - 11 2026-06-23
MDA391 Mandarin Airlines 11 2026-06-22
MDA374 Mandarin Airlines 11 2026-07-24
MDA373 Mandarin Airlines 11 2026-07-24
MDA2378 - 11 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 MDA396 TTT → TSA Jul 26, 12:20 UTCJul 26, 12:40 UTC20m
2026-07-26 MDA395 TSA → TTT Jul 26, 10:00 UTCJul 26, 10:20 UTC20m
2026-07-26 MDA372 MZG → TSA Jul 26, 07:40 UTCJul 26, 08:30 UTC50m
2026-07-26 MDA371 TSA → MZG Jul 26, 06:00 UTCJul 26, 06:45 UTC46m
2026-07-26 MDA7902 LZN → TSA Jul 26, 04:45 UTCJul 26, 05:10 UTC25m
2026-07-26 MDA7901 TSA → LZN Jul 26, 02:50 UTCJul 26, 03:10 UTC20m
2026-07-26 MDA1262 KNH → TSA Jul 26, 01:20 UTCJul 26, 02:00 UTC40m
2026-07-25 MDA1261 TSA → KNH Jul 25, 22:50 UTCJul 25, 23:35 UTC45m
2026-07-25 MDA1278 KNH → TSA Jul 25, 11:45 UTCJul 25, 12:30 UTC45m
2026-07-25 MDA1277 TSA → KNH Jul 25, 09:45 UTCJul 25, 10:30 UTC45m
2026-07-25 MDA372 MZG → TSA Jul 25, 07:55 UTCJul 25, 08:40 UTC45m
2026-07-25 MDA371 TSA → MZG Jul 25, 06:30 UTCJul 25, 07:15 UTC45m
2026-07-25 MDA7902 LZN → TSA Jul 25, 05:15 UTCJul 25, 05:35 UTC20m
2026-07-25 MDA7901 TSA → LZN Jul 25, 03:15 UTCJul 25, 03:45 UTC30m
2026-07-25 MDA1262 KNH → TSA Jul 25, 01:25 UTCJul 25, 02:20 UTC55m
2026-07-24 MDA1261 TSA → KNH Jul 24, 22:55 UTCJul 24, 23:50 UTC55m
2026-07-24 MDA1280 KNH → TSA Jul 24, 13:00 UTCJul 24, 13:50 UTC50m
2026-07-24 MDA1279 TSA → KNH Jul 24, 10:45 UTCJul 24, 11:25 UTC40m
2026-07-24 MDA374 MZG → TSA Jul 24, 09:05 UTCJul 24, 09:50 UTC45m
2026-07-24 MDA373 TSA → MZG Jul 24, 07:30 UTCJul 24, 08:15 UTC45m
2026-07-24 MDA370 MZG → TSA Jul 24, 05:40 UTCJul 24, 06:20 UTC40m
2026-07-24 MDA369 TSA → MZG Jul 24, 03:45 UTCJul 24, 04:30 UTC45m
2026-07-24 MDA366 MZG → TSA Jul 24, 01:45 UTCJul 24, 02:30 UTC45m
2026-07-24 MDA365 TSA → MZG Jul 24, 00:15 UTCJul 24, 01:00 UTC45m
2026-07-23 MDA2376 MZG → TSA Jul 23, 11:35 UTCJul 23, 12:10 UTC35m
2026-07-23 MDA2375 TSA → MZG Jul 23, 09:45 UTCJul 23, 10:30 UTC45m
2026-07-23 MDA2372 MZG → TSA Jul 23, 08:15 UTCJul 23, 08:55 UTC40m
2026-07-23 MDA2371 TSA → MZG Jul 23, 06:35 UTCJul 23, 07:25 UTC50m
2026-07-23 MDA1266 KNH → TSA Jul 23, 04:50 UTCJul 23, 05:40 UTC50m
2026-07-23 MDA1265 TSA → KNH Jul 23, 02:30 UTCJul 23, 03:15 UTC45m
2026-07-23 MDA362 MZG → TSA Jul 23, 00:50 UTCJul 23, 01:30 UTC40m
2026-07-22 MDA361 - Jul 22, 23:15 UTCJul 23, 00:00 UTC45m
2026-07-22 MDA378 MZG → TSA Jul 22, 12:25 UTCJul 22, 13:10 UTC45m
2026-07-22 MDA377 TSA → MZG Jul 22, 11:10 UTCJul 22, 11:40 UTC30m
2026-07-22 MDA1265 TSA → KNH Jul 22, 03:15 UTCJul 22, 03:55 UTC40m
2026-07-22 MDA362 MZG → TSA Jul 22, 01:10 UTCJul 22, 02:10 UTC1h 0m
2026-07-21 MDA361 - Jul 21, 23:25 UTCJul 22, 00:20 UTC55m
2026-07-21 MDA386 MZG → TSA Jul 21, 13:25 UTCJul 21, 14:05 UTC40m
2026-07-21 MDA385 TSA → MZG Jul 21, 12:00 UTCJul 21, 12:45 UTC45m
2026-07-21 MDA376 MZG → TSA Jul 21, 10:25 UTCJul 21, 11:10 UTC45m
2026-07-21 MDA375 TSA → MZG Jul 21, 08:40 UTCJul 21, 09:35 UTC55m
2026-07-21 MDA1270 KNH → TSA Jul 21, 06:35 UTCJul 21, 07:15 UTC40m
2026-07-21 MDA1269 TSA → KNH Jul 21, 04:30 UTCJul 21, 05:15 UTC45m
2026-07-21 MDA1264 KNH → TSA Jul 21, 02:40 UTCJul 21, 03:25 UTC45m
2026-07-21 MDA1263 TSA → KNH Jul 21, 00:25 UTCJul 21, 01:15 UTC50m
2026-07-20 MDA1280 KNH → TSA Jul 20, 12:55 UTCJul 20, 13:30 UTC35m
2026-07-20 MDA1279 TSA → KNH Jul 20, 10:35 UTCJul 20, 11:20 UTC45m
2026-07-20 MDA374 MZG → TSA Jul 20, 09:00 UTCJul 20, 09:40 UTC40m
2026-07-20 MDA373 TSA → MZG Jul 20, 07:25 UTCJul 20, 08:10 UTC45m
2026-07-20 MDA370 - Jul 20, 05:45 UTCJul 20, 06:25 UTC40m

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-16821 page for operator, model, and routing details .

Mode-S 8990F1 frequently asked

What is Mode-S code 8990F1?
8990F1 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-16821.
Where is Mode-S 8990F1 registered?
Mode-S code 8990F1 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8990F1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 12:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8990F1, octal 42310361, decimal 9,015,537.
What flights does 8990F1 operate?
Mode-S 8990F1 has broadcast 20 distinct callsigns, including MDA376, MDA2368, MDA1270, MDA375, MDA2367.