Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

8990F3

ICAO 24-bit transponder address · allocated to Taiwan

Currently assigned to B-18906 · AIRBUS A-350-900

Hex
8990F3
Octal
42310363
Decimal
9,015,539
Country
TW
Tail
B-18906
Type
A359
Broadcasting now · callsign CAL753 · 40,000 ft
Flights observed
199
Distinct callsigns
20
Country
TW
Last broadcast
29m ago

Current position

8990F3 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 8990F3 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
CAL036 - 21 2026-07-12
CAL035 - 16 2026-07-13
CAL064 - 10 2026-06-23
CAL054 - 9 2026-06-26
CAL053 - 8 2026-06-26
CAL761 - 7 2026-06-29
CAL153 - 7 2026-06-27
CAL152 - 7 2026-06-27
CAL063 China Airlines 7 2026-06-22
CAL022 - 7 2026-07-06
CAL082 China Airlines 6 2026-05-27
CAL081 China Airlines 6 2026-05-27
CAL024 - 6 2026-07-02
CAL021 - 6 2026-07-07
CAL782 - 5 2026-07-09
CAL781 - 5 2026-06-11
CAL762 - 5 2026-06-29
CAL023 China Airlines 5 2026-07-03
CAL157 China Airlines 4 2026-06-03
CAL753 - 3 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CAL753 - Jul 14, 00:35 UTCJul 14, 00:45 UTC10m
2026-07-13 CAL035 - Jul 13, 19:55 UTCJul 13, 20:15 UTC20m
2026-07-13 CAL035 - Jul 13, 06:55 UTCJul 13, 18:50 UTC11h 55m
2026-07-12 CAL036 TPE → PHX Jul 12, 09:50 UTCJul 12, 22:40 UTC12h 50m
2026-07-11 CAL035 PHX → TPE Jul 11, 06:45 UTCJul 11, 20:10 UTC13h 25m
2026-07-10 CAL036 - Jul 10, 11:20 UTCJul 10, 22:00 UTC10h 40m
2026-07-10 CAL036 - Jul 10, 09:45 UTCJul 10, 10:00 UTC15m
2026-07-09 CAL782 TPE → TPE Jul 9, 23:30 UTCJul 10, 07:20 UTC7h 50m
2026-07-09 CAL035 - Jul 9, 06:45 UTCJul 9, 20:35 UTC13h 50m
2026-07-08 CAL036 - Jul 8, 11:20 UTCJul 8, 22:05 UTC10h 45m
2026-07-08 CAL036 - Jul 8, 09:45 UTCJul 8, 10:05 UTC20m
2026-07-07 CAL782 TPE → TPE Jul 7, 23:35 UTCJul 8, 07:30 UTC7h 55m
2026-07-07 CAL021 SEA → TPE Jul 7, 08:55 UTCJul 7, 20:30 UTC11h 35m
2026-07-06 CAL022 - Jul 6, 15:50 UTCJul 7, 02:20 UTC10h 30m
2026-07-06 CAL501 TPE → TPE Jul 6, 01:05 UTCJul 6, 06:00 UTC4h 55m
2026-07-05 CAL021 - Jul 5, 20:30 UTCJul 5, 20:50 UTC20m
2026-07-05 CAL021 - Jul 5, 09:00 UTCJul 5, 19:10 UTC10h 10m
2026-07-04 CAL022 - Jul 4, 15:55 UTCJul 5, 02:20 UTC10h 25m
2026-07-03 CAL023 ONT → TPE Jul 3, 20:50 UTCJul 3, 21:05 UTC15m
2026-07-03 CAL023 ONT → TPE Jul 3, 08:05 UTCJul 3, 20:05 UTC12h 0m
2026-07-02 CAL024 - Jul 2, 15:25 UTCJul 3, 01:05 UTC9h 40m
2026-07-02 CAL024 - Jul 2, 13:55 UTCJul 2, 14:10 UTC15m
2026-07-01 CAL023 ONT → TPE Jul 1, 20:45 UTCJul 1, 21:10 UTC25m
2026-07-01 CAL023 ONT → TPE Jul 1, 08:05 UTCJul 1, 20:10 UTC12h 5m
2026-06-30 CAL024 - Jun 30, 15:30 UTCJul 1, 01:25 UTC9h 55m
2026-06-30 CAL024 - Jun 30, 14:00 UTCJun 30, 14:20 UTC20m
2026-06-30 CAL832 - Jun 30, 06:40 UTCJun 30, 10:05 UTC3h 25m
2026-06-30 CAL831 - Jun 30, 01:55 UTCJun 30, 04:55 UTC3h 0m
2026-06-29 CAL762 - Jun 29, 09:20 UTCJun 29, 12:39 UTC3h 20m
2026-06-29 CAL761 - Jun 29, 05:40 UTCJun 29, 05:59 UTC20m
2026-06-29 CAL761 - Jun 29, 01:20 UTCJun 29, 04:20 UTC3h 0m
2026-06-28 CAL062 FRA → TPE Jun 28, 09:55 UTCJun 28, 22:04 UTC12h 10m
2026-06-27 CAL061 TPE → FRA Jun 27, 14:49 UTCJun 27, 20:49 UTC6h 0m
2026-06-27 CAL153 - Jun 27, 05:39 UTCJun 27, 07:59 UTC2h 20m
2026-06-27 CAL152 - Jun 27, 03:15 UTCJun 27, 03:49 UTC35m
2026-06-27 CAL152 - Jun 27, 01:44 UTCJun 27, 01:54 UTC10m
2026-06-26 CAL054 - Jun 26, 13:45 UTCJun 26, 22:14 UTC8h 30m
2026-06-26 CAL054 - Jun 26, 08:40 UTCJun 26, 11:55 UTC3h 15m
2026-06-26 CAL053 BNE → AKL Jun 26, 04:24 UTCJun 26, 07:05 UTC2h 40m
2026-06-25 CAL053 TPE → BNE Jun 25, 18:00 UTCJun 26, 02:05 UTC8h 5m
2026-06-24 CAL762 - Jun 24, 09:45 UTCJun 24, 13:00 UTC3h 15m
2026-06-24 CAL761 - Jun 24, 06:15 UTCJun 24, 06:29 UTC15m
2026-06-24 CAL761 - Jun 24, 01:44 UTCJun 24, 04:50 UTC3h 5m
2026-06-23 CAL064 VIE → TPE Jun 23, 09:45 UTCJun 23, 21:20 UTC11h 35m
2026-06-22 CAL063 TPE → VIE Jun 22, 16:14 UTCJun 23, 04:45 UTC12h 30m
2026-06-22 CAL153 - Jun 22, 07:30 UTCJun 22, 07:49 UTC20m
2026-06-22 CAL153 - Jun 22, 05:40 UTCJun 22, 06:15 UTC35m
2026-06-22 CAL152 - Jun 22, 03:24 UTCJun 22, 04:09 UTC45m
2026-06-22 CAL152 - Jun 22, 01:49 UTCJun 22, 02:04 UTC15m
2026-06-21 CAL021 SEA → TPE Jun 21, 08:25 UTCJun 21, 19:50 UTC11h 25m

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-18906 page for operator, model, and routing details .

Mode-S 8990F3 frequently asked

What is Mode-S code 8990F3?
8990F3 is an ICAO 24-bit transponder address. Allocated to Taiwan. Assigned to B-18906.
Where is Mode-S 8990F3 registered?
Mode-S code 8990F3 is allocated to Taiwan (TW). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8990F3 broadcasting right now?
Yes. Mode-S 8990F3 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8990F3, octal 42310363, decimal 9,015,539.
What flights does 8990F3 operate?
Mode-S 8990F3 has broadcast 20 distinct callsigns, including CAL036, CAL035, CAL064, CAL054, CAL053.