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
Broadcasting now · callsign EVA608 · 31,000 ft
Flights observed
175
Distinct callsigns
20
Country
TW
Last broadcast
2h ago

Current position

899121 is currently broadcasting. Map zoomed to live position.

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 EVA Air 13 2026-05-21
EVA667 EVA Air 12 2026-05-22
EVA659 EVA Air 9 2026-05-17
EVA642 EVA Air 8 2026-05-26
EVA621 EVA Air 8 2026-05-20
EVA658 EVA Air 7 2026-05-16
EVA608 EVA Air 7 2026-05-30
EVA696 EVA Air 6 2026-05-12
EVA634 EVA Air 6 2026-05-27
EVA622 EVA Air 6 2026-05-19
EVA641 EVA Air 5 2026-05-26
EVA607 EVA Air 5 2026-05-07
EVA651 EVA Air 4 2026-05-25
EVA633 EVA Air 4 2026-05-28
EVA6052 - 4 2026-05-23
EVA6051 - 4 2026-05-22
EVA697 EVA Air 3 2026-05-13
EVA654 EVA Air 3 2026-04-21
EVA6537 EVA Air 3 2026-05-07
EVA650 EVA Air 3 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 EVA608 TPE → ANC May 30, 05:25 UTCMay 30, 05:40 UTC15m
2026-05-29 EVA6536 HKG → TPE May 29, 19:55 UTCMay 29, 21:15 UTC1h 20m
2026-05-29 EVA6535 TPE → HKG May 29, 16:00 UTCMay 29, 17:15 UTC1h 15m
2026-05-29 EVA6062 HAN → TPE May 29, 10:40 UTCMay 29, 13:00 UTC2h 20m
2026-05-29 EVA6061 TPE → SIN May 29, 05:30 UTCMay 29, 08:20 UTC2h 50m
2026-05-29 EVA6061 TPE → SIN May 29, 02:55 UTCMay 29, 03:20 UTC25m
2026-05-28 EVA6061 TPE → SIN May 28, 23:15 UTCMay 29, 00:10 UTC55m
2026-05-28 EVA633 ORD → TPE May 28, 07:40 UTCMay 28, 19:45 UTC12h 5m
2026-05-28 EVA633 ORD → TPE May 28, 00:00 UTCMay 28, 05:15 UTC5h 15m
2026-05-27 EVA634 TPE → ORD May 27, 14:20 UTCMay 27, 20:40 UTC6h 20m
2026-05-27 EVA634 TPE → ORD May 27, 05:35 UTCMay 27, 12:35 UTC7h 0m
2026-05-27 EVA634 TPE → ORD May 27, 03:59 UTCMay 27, 04:14 UTC15m
2026-05-26 EVA641 ORD → TPE May 26, 10:20 UTCMay 27, 00:49 UTC14h 30m
2026-05-26 EVA642 TPE → ORD May 26, 02:19 UTCMay 26, 07:34 UTC5h 15m
2026-05-25 EVA642 TPE → ORD May 25, 23:35 UTCMay 26, 00:39 UTC1h 5m
2026-05-25 EVA642 TPE → ORD May 25, 15:40 UTCMay 25, 15:55 UTC15m
2026-05-25 EVA651 ANC → TPE May 25, 12:20 UTCMay 25, 12:55 UTC35m
2026-05-25 EVA651 ANC → TPE May 25, 03:40 UTCMay 25, 11:05 UTC7h 25m
2026-05-25 EVA651 ANC → TPE May 25, 01:55 UTCMay 25, 02:05 UTC10m
2026-05-24 EVA651 ANC → TPE May 24, 20:25 UTCMay 24, 21:50 UTC1h 25m
2026-05-24 EVA650 TPE → ATL May 24, 11:05 UTCMay 24, 16:20 UTC5h 15m
2026-05-24 EVA650 TPE → ATL May 24, 03:05 UTCMay 24, 09:45 UTC6h 40m
2026-05-24 EVA650 TPE → ATL May 24, 01:15 UTCMay 24, 01:30 UTC15m
2026-05-23 EVA6328 CAN → TPE May 23, 21:05 UTCMay 23, 22:30 UTC1h 25m
2026-05-23 EVA6327 TPE → CAN May 23, 16:20 UTCMay 23, 17:35 UTC1h 15m
2026-05-23 EVA6820 HKG → TPE May 23, 13:00 UTCMay 23, 14:25 UTC1h 25m
2026-05-23 EVA6819 TPE → HKG May 23, 08:35 UTCMay 23, 09:55 UTC1h 20m
2026-05-23 EVA6052 - May 23, 02:00 UTCMay 23, 06:15 UTC4h 15m
2026-05-22 EVA6051 - May 22, 22:55 UTCMay 22, 23:10 UTC15m
2026-05-22 EVA6051 - May 22, 19:25 UTCMay 22, 20:35 UTC1h 10m
2026-05-22 EVA667 ATL → ANC May 22, 12:25 UTCMay 22, 14:45 UTC2h 20m
2026-05-21 EVA667 ATL → ANC May 21, 20:45 UTCMay 22, 10:45 UTC14h 0m
2026-05-21 EVA668 TPE → ANC May 21, 12:05 UTCMay 21, 18:20 UTC6h 15m
2026-05-21 EVA668 TPE → ANC May 21, 02:25 UTCMay 21, 10:50 UTC8h 25m
2026-05-20 EVA6328 CAN → TPE May 20, 22:05 UTCMay 20, 23:30 UTC1h 25m
2026-05-20 EVA6327 TPE → CAN May 20, 18:40 UTCMay 20, 19:10 UTC30m
2026-05-20 EVA6327 TPE → CAN May 20, 17:40 UTCMay 20, 18:10 UTC30m
2026-05-20 EVA621 LAX → TPE May 20, 14:50 UTCMay 20, 15:15 UTC25m
2026-05-20 EVA621 LAX → TPE May 20, 01:55 UTCMay 20, 13:25 UTC11h 31m
2026-05-19 EVA622 TPE → LAX May 19, 13:20 UTCMay 19, 22:55 UTC9h 35m
2026-05-19 EVA622 TPE → LAX May 19, 11:35 UTCMay 19, 11:45 UTC10m
2026-05-19 EVA619 LAX → TPE May 19, 08:35 UTCMay 19, 09:00 UTC25m
2026-05-18 EVA619 LAX → TPE May 18, 19:10 UTCMay 19, 07:15 UTC12h 5m
2026-05-18 EVA620 TPE → LAX May 18, 11:55 UTCMay 18, 16:20 UTC4h 25m
2026-05-18 EVA620 TPE → LAX May 18, 03:05 UTCMay 18, 10:25 UTC7h 20m
2026-05-18 EVA620 TPE → LAX May 18, 01:30 UTCMay 18, 01:45 UTC15m
2026-05-17 EVA6021 TPE → HAN May 17, 16:30 UTCMay 17, 23:45 UTC7h 15m
2026-05-17 EVA659 ORD → ANC May 17, 13:01 UTCMay 17, 13:25 UTC25m
2026-05-17 EVA659 ORD → ANC May 17, 04:15 UTCMay 17, 11:35 UTC7h 20m
2026-05-16 EVA659 ORD → ANC May 16, 20:30 UTCMay 17, 02:20 UTC5h 50m

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?
Yes. Mode-S 899121 is currently airborne.
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, EVA642, EVA621.