Apparatus

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sensors Mode-S transponder

899121

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-16781 · BOEING 777-200LR

Hex
899121
Octal
42310441
Decimal
9,015,585
Country
TW
Tail
B-16781
Type
B77L
No current signal · last broadcast Jul 26, 20:15 UTC
Flights observed
366
Distinct callsigns
20
Country
TW
Last broadcast
Jul 26, 20:15 UTC

Last known position

Most recent position reported by Mode-S 899121.

Country allocation

The ICAO 24-bit address 899121 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
EVA668 - 20 2026-06-29
EVA667 - 16 2026-06-30
EVA659 - 15 2026-07-02
EVA658 - 14 2026-07-01
EVA634 EVA Air 14 2026-07-22
EVA654 - 13 2026-07-09
EVA642 EVA Air 13 2026-06-12
EVA638 EVA Air 12 2026-07-26
EVA647 EVA Air 11 2026-07-22
EVA646 - 10 2026-07-21
EVA6061 - 10 2026-07-20
EVA653 - 9 2026-07-11
EVA641 EVA Air 9 2026-06-13
EVA608 EVA Air 9 2026-05-30
EVA621 EVA Air 8 2026-05-20
EVA6529 - 7 2026-07-08
EVA637 - 7 2026-07-06
EVA633 EVA Air 7 2026-07-24
EVA620 EVA Air 7 2026-07-02
EVA607 EVA Air 7 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EVA638 TPE → JFK Jul 26, 19:25 UTCJul 26, 20:15 UTC50m
2026-07-26 EVA638 TPE → JFK Jul 26, 10:25 UTCJul 26, 17:50 UTC7h 25m
2026-07-26 EVA638 TPE → JFK Jul 26, 08:45 UTCJul 26, 08:55 UTC10m
2026-07-26 EVA6004 BKK → TPE Jul 26, 02:10 UTCJul 26, 05:25 UTC3h 15m
2026-07-25 EVA6003 - Jul 25, 20:40 UTCJul 25, 23:55 UTC3h 15m
2026-07-25 EVA6052 - Jul 25, 13:55 UTCJul 25, 18:05 UTC4h 10m
2026-07-25 EVA6051 - Jul 25, 10:35 UTCJul 25, 11:00 UTC25m
2026-07-25 EVA6051 - Jul 25, 06:45 UTCJul 25, 07:50 UTC1h 5m
2026-07-24 EVA6036 - Jul 24, 17:05 UTCJul 24, 20:10 UTC3h 5m
2026-07-24 EVA6035 - Jul 24, 14:00 UTCJul 24, 14:35 UTC35m
2026-07-24 EVA6035 - Jul 24, 10:35 UTCJul 24, 10:45 UTC10m
2026-07-24 EVA6035 - Jul 24, 07:00 UTCJul 24, 07:55 UTC55m
2026-07-24 EVA633 ORD → TPE Jul 24, 03:55 UTCJul 24, 04:25 UTC30m
2026-07-23 EVA633 ORD → TPE Jul 23, 16:50 UTCJul 24, 02:30 UTC9h 40m
2026-07-23 EVA633 ORD → TPE Jul 23, 08:05 UTCJul 23, 13:25 UTC5h 20m
2026-07-22 EVA634 TPE → ORD Jul 22, 23:20 UTCJul 23, 05:30 UTC6h 10m
2026-07-22 EVA634 TPE → ORD Jul 22, 15:15 UTCJul 22, 22:00 UTC6h 45m
2026-07-22 EVA634 TPE → ORD Jul 22, 13:30 UTCJul 22, 13:40 UTC10m
2026-07-22 EVA647 DFW → ANC Jul 22, 01:15 UTCJul 22, 02:00 UTC45m
2026-07-21 EVA647 DFW → ANC Jul 21, 17:25 UTCJul 21, 23:35 UTC6h 10m
2026-07-21 EVA646 ANC → ORD Jul 21, 08:50 UTCJul 21, 14:00 UTC5h 10m
2026-07-21 EVA646 - Jul 21, 00:45 UTCJul 21, 07:30 UTC6h 45m
2026-07-20 EVA646 - Jul 20, 23:15 UTCJul 20, 23:25 UTC10m
2026-07-20 EVA6004 BKK → TPE Jul 20, 18:30 UTCJul 20, 21:45 UTC3h 15m
2026-07-20 EVA6003 - Jul 20, 12:35 UTCJul 20, 15:45 UTC3h 10m
2026-07-20 EVA6062 HAN → TPE Jul 20, 07:55 UTCJul 20, 10:20 UTC2h 25m
2026-07-20 EVA6061 - Jul 20, 04:40 UTCJul 20, 04:50 UTC10m
2026-07-20 EVA6061 - Jul 20, 02:15 UTCJul 20, 02:40 UTC25m
2026-07-19 EVA6061 - Jul 19, 23:15 UTCJul 19, 23:30 UTC15m
2026-07-19 EVA6061 - Jul 19, 19:40 UTCJul 19, 20:35 UTC55m
2026-07-19 EVA635 JFK → ANC Jul 19, 16:20 UTCJul 19, 16:50 UTC30m
2026-07-19 EVA635 JFK → ANC Jul 19, 07:50 UTCJul 19, 15:10 UTC7h 20m
2026-07-18 EVA635 JFK → ANC Jul 18, 23:00 UTCJul 19, 06:10 UTC7h 10m
2026-07-18 EVA634 ANC → JFK Jul 18, 07:15 UTCJul 18, 13:30 UTC6h 15m
2026-07-17 EVA634 - Jul 17, 22:49 UTCJul 18, 05:45 UTC6h 56m
2026-07-17 EVA634 - Jul 17, 20:55 UTCJul 17, 21:10 UTC15m
2026-07-15 EVA647 - Jul 15, 14:55 UTCJul 15, 15:15 UTC20m
2026-07-15 EVA647 - Jul 15, 06:35 UTCJul 15, 13:45 UTC7h 10m
2026-07-14 EVA647 - Jul 14, 20:55 UTCJul 15, 02:50 UTC5h 54m
2026-07-14 EVA646 ANC → ORD Jul 14, 12:25 UTCJul 14, 17:40 UTC5h 15m
2026-07-14 EVA646 TPE → ANC Jul 14, 01:35 UTCJul 14, 10:25 UTC8h 50m
2026-07-13 EVA6004 - Jul 13, 21:45 UTCJul 13, 22:45 UTC1h 0m
2026-07-13 EVA6004 - Jul 13, 19:35 UTCJul 13, 19:45 UTC10m
2026-07-13 EVA6003 - Jul 13, 16:40 UTCJul 13, 16:50 UTC10m
2026-07-13 EVA6003 - Jul 13, 13:45 UTCJul 13, 14:25 UTC40m
2026-07-13 EVA6062 - Jul 13, 09:40 UTCJul 13, 11:10 UTC1h 30m
2026-07-13 EVA6062 - Jul 13, 08:45 UTCJul 13, 08:55 UTC10m
2026-07-13 EVA6061 - Jul 13, 03:45 UTCJul 13, 04:10 UTC25m
2026-07-13 EVA6061 - Jul 13, 01:01 UTCJul 13, 01:10 UTC10m
2026-07-12 EVA6061 - Jul 12, 21:25 UTCJul 12, 22:05 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-16781 page for operator, model, and routing details .

Mode-S 899121 frequently asked

What is Mode-S code 899121?
899121 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-16781.
Where is Mode-S 899121 registered?
Mode-S code 899121 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 899121 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 899121, octal 42310441, decimal 9,015,585.
What flights does 899121 operate?
Mode-S 899121 has broadcast 20 distinct callsigns, including EVA668, EVA667, EVA659, EVA658, EVA634.