sensors Mode-S transponder
8990EC
ICAO 24-bit transponder address · allocated to Taiwan
Currently assigned to B-18917 · AIRBUS A-350-900
- Hex
- 8990EC
- Octal
- 42310354
- Decimal
- 9,015,532
- Country
- TW
- Tail
- B-18917
- Type
- A359
- Flights observed
- 197
- Distinct callsigns
- 20
- Country
- TW
- Last broadcast
- 16h ago
Last known position
Country allocation
The ICAO 24-bit address 8990EC 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 |
|---|---|---|---|
| CAL761 | - | 15 | 2026-07-08 |
| CAL762 | - | 12 | 2026-07-08 |
| CAL075 | - | 10 | 2026-06-23 |
| CAL054 | - | 9 | 2026-07-09 |
| CAL053 | - | 9 | 2026-07-09 |
| CAL023 | China Airlines | 9 | 2026-06-28 |
| CAL062 | China Airlines | 8 | 2026-07-01 |
| CAL076 | - | 7 | 2026-06-24 |
| CAL074 | - | 7 | 2026-06-22 |
| CAL073 | China Airlines | 7 | 2026-06-21 |
| CAL064 | China Airlines | 7 | 2026-05-28 |
| CAL061 | China Airlines | 7 | 2026-06-30 |
| CAL024 | - | 7 | 2026-06-27 |
| CAL082 | - | 6 | 2026-07-03 |
| CAL081 | - | 6 | 2026-07-03 |
| CAL063 | China Airlines | 6 | 2026-05-27 |
| CAL022 | China Airlines | 6 | 2026-05-23 |
| CAL152 | - | 5 | 2026-06-18 |
| CAL021 | China Airlines | 5 | 2026-05-24 |
| CAL753 | - | 3 | 2026-07-06 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | CAL101 | NRT → TPE | Jul 13, 07:40 UTC | Jul 13, 10:25 UTC | 2h 45m |
| 2026-07-13 | CAL100 | - | Jul 13, 02:40 UTC | Jul 13, 05:35 UTC | 2h 55m |
| 2026-07-11 | CAL916D | HKG → TPE | Jul 11, 23:40 UTC | Jul 12, 01:10 UTC | 1h 30m |
| 2026-07-10 | CAL915 | - | Jul 10, 06:45 UTC | Jul 10, 08:05 UTC | 1h 20m |
| 2026-07-09 | CAL054 | BNE → TPE | Jul 9, 13:50 UTC | Jul 9, 22:20 UTC | 8h 30m |
| 2026-07-09 | CAL054 | - | Jul 9, 08:10 UTC | Jul 9, 11:50 UTC | 3h 40m |
| 2026-07-09 | CAL053 | BNE → AKL | Jul 9, 03:15 UTC | Jul 9, 06:10 UTC | 2h 55m |
| 2026-07-08 | CAL053 | - | Jul 8, 16:20 UTC | Jul 9, 00:05 UTC | 7h 45m |
| 2026-07-08 | CAL762 | - | Jul 8, 09:30 UTC | Jul 8, 12:55 UTC | 3h 25m |
| 2026-07-08 | CAL761 | - | Jul 8, 05:55 UTC | Jul 8, 06:15 UTC | 20m |
| 2026-07-08 | CAL761 | - | Jul 8, 01:30 UTC | Jul 8, 04:35 UTC | 3h 5m |
| 2026-07-07 | CAL054 | BNE → TPE | Jul 7, 13:10 UTC | Jul 7, 21:35 UTC | 8h 25m |
| 2026-07-07 | CAL054 | - | Jul 7, 08:05 UTC | Jul 7, 11:05 UTC | 3h 0m |
| 2026-07-07 | CAL053 | - | Jul 7, 03:25 UTC | Jul 7, 06:10 UTC | 2h 45m |
| 2026-07-06 | CAL053 | TPE → BNE | Jul 6, 16:20 UTC | Jul 7, 00:10 UTC | 7h 50m |
| 2026-07-06 | CAL754 | - | Jul 6, 09:00 UTC | Jul 6, 10:15 UTC | 1h 15m |
| 2026-07-06 | CAL753 | - | Jul 6, 03:55 UTC | Jul 6, 04:15 UTC | 20m |
| 2026-07-06 | CAL753 | - | Jul 6, 00:20 UTC | Jul 6, 01:25 UTC | 1h 5m |
| 2026-07-05 | CAL054 | BNE → TPE | Jul 5, 13:00 UTC | Jul 5, 21:25 UTC | 8h 25m |
| 2026-07-05 | CAL054 | - | Jul 5, 07:50 UTC | Jul 5, 11:10 UTC | 3h 20m |
| 2026-07-05 | CAL053 | BNE → AKL | Jul 5, 03:20 UTC | Jul 5, 05:50 UTC | 2h 30m |
| 2026-07-04 | CAL053 | - | Jul 4, 23:20 UTC | Jul 5, 00:35 UTC | 1h 15m |
| 2026-07-04 | CAL053 | - | Jul 4, 16:35 UTC | Jul 4, 17:00 UTC | 25m |
| 2026-07-03 | CAL082 | LHR → TPE | Jul 3, 20:45 UTC | Jul 4, 09:45 UTC | 13h 0m |
| 2026-07-03 | CAL081 | - | Jul 3, 02:35 UTC | Jul 3, 15:55 UTC | 13h 20m |
| 2026-07-03 | CAL081 | - | Jul 3, 01:40 UTC | Jul 3, 02:00 UTC | 20m |
| 2026-07-02 | CAL163 | ICN → TPE | Jul 2, 11:50 UTC | Jul 2, 13:55 UTC | 2h 5m |
| 2026-07-02 | CAL162 | TPE → ICN | Jul 2, 07:45 UTC | Jul 2, 09:50 UTC | 2h 5m |
| 2026-07-02 | CAL501 | - | Jul 2, 01:10 UTC | Jul 2, 06:00 UTC | 4h 50m |
| 2026-07-01 | CAL062 | FRA → TPE | Jul 1, 09:55 UTC | Jul 1, 22:10 UTC | 12h 15m |
| 2026-06-30 | CAL061 | TPE → FRA | Jun 30, 15:20 UTC | Jul 1, 04:40 UTC | 13h 20m |
| 2026-06-30 | CAL082 | - | Jun 30, 09:10 UTC | Jun 30, 09:35 UTC | 25m |
| 2026-06-29 | CAL082 | - | Jun 29, 20:35 UTC | Jun 30, 08:35 UTC | 12h 1m |
| 2026-06-29 | CAL081 | - | Jun 29, 01:34 UTC | Jun 29, 15:45 UTC | 14h 10m |
| 2026-06-28 | CAL023 | ONT → TPE | Jun 28, 07:20 UTC | Jun 28, 20:34 UTC | 13h 15m |
| 2026-06-27 | CAL024 | - | Jun 27, 15:05 UTC | Jun 28, 00:59 UTC | 9h 55m |
| 2026-06-27 | CAL024 | - | Jun 27, 13:40 UTC | Jun 27, 13:55 UTC | 15m |
| 2026-06-27 | CAL834 | - | Jun 27, 04:15 UTC | Jun 27, 07:30 UTC | 3h 15m |
| 2026-06-26 | CAL833 | TPE → BKK | Jun 26, 23:30 UTC | Jun 27, 02:35 UTC | 3h 5m |
| 2026-06-26 | CAL023 | ONT → TPE | Jun 26, 20:24 UTC | Jun 26, 20:50 UTC | 25m |
| 2026-06-26 | CAL023 | ONT → TPE | Jun 26, 07:24 UTC | Jun 26, 08:05 UTC | 40m |
| 2026-06-25 | CAL024 | TPE → ONT | Jun 25, 14:55 UTC | Jun 26, 02:14 UTC | 11h 20m |
| 2026-06-25 | CAL916 | HKG → TPE | Jun 25, 09:55 UTC | Jun 25, 11:30 UTC | 1h 35m |
| 2026-06-25 | CAL915 | TPE → HKG | Jun 25, 07:05 UTC | Jun 25, 08:20 UTC | 1h 15m |
| 2026-06-24 | CAL076 | - | Jun 24, 09:29 UTC | Jun 24, 21:34 UTC | 12h 5m |
| 2026-06-23 | CAL075 | - | Jun 23, 16:14 UTC | Jun 24, 05:29 UTC | 13h 15m |
| 2026-06-23 | CAL502 | TPE → TPE | Jun 23, 01:04 UTC | Jun 23, 05:45 UTC | 4h 40m |
| 2026-06-22 | CAL074 | - | Jun 22, 09:30 UTC | Jun 22, 22:15 UTC | 12h 45m |
| 2026-06-21 | CAL073 | TPE → AMS | Jun 21, 15:34 UTC | Jun 22, 05:24 UTC | 13h 50m |
| 2026-06-20 | CAL082 | LHR → TPE | Jun 20, 20:40 UTC | Jun 21, 09:49 UTC | 13h 10m |
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-18917 page for operator, model, and routing details .