sensors Mode-S transponder
89901B
ICAO 24-bit transponder address · allocated to Taiwan
Currently assigned to B-18001 · BOEING 777-300ER
- Hex
- 89901B
- Octal
- 42310033
- Decimal
- 9,015,323
- Country
- TW
- Tail
- B-18001
- Type
- B77W
- Flights observed
- 162
- Distinct callsigns
- 20
- Country
- TW
- Last broadcast
- 7h ago
Last known position
Country allocation
The ICAO 24-bit address 89901B 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 |
|---|---|---|---|
| CAL008 | - | 14 | 2026-07-13 |
| CAL007 | - | 13 | 2026-06-24 |
| CAL004 | - | 13 | 2026-06-13 |
| CAL023 | China Airlines | 12 | 2026-06-04 |
| CAL003 | - | 12 | 2026-06-14 |
| CAL032 | China Airlines | 11 | 2026-06-30 |
| CAL024 | China Airlines | 11 | 2026-06-03 |
| CAL772 | - | 10 | 2026-07-13 |
| CAL031 | China Airlines | 9 | 2026-07-01 |
| CAL784 | - | 8 | 2026-07-12 |
| CAL722 | - | 8 | 2026-07-02 |
| CAL721 | - | 6 | 2026-07-02 |
| CAL783 | - | 5 | 2026-07-03 |
| CAL782 | - | 3 | 2026-06-12 |
| CAL781 | - | 3 | 2026-06-19 |
| CAL153 | - | 3 | 2026-06-30 |
| CAL152 | - | 3 | 2026-06-30 |
| CAL923 | China Airlines | 2 | 2026-05-24 |
| CAL157 | - | 2 | 2026-06-25 |
| CAL156 | - | 2 | 2026-06-25 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | CAL008 | - | Jul 13, 16:35 UTC | Jul 13, 19:30 UTC | 2h 55m |
| 2026-07-13 | CAL772 | TPE → TPE | Jul 13, 01:35 UTC | Jul 13, 12:50 UTC | 11h 15m |
| 2026-07-12 | CAL784 | TPE → TPE | Jul 12, 06:05 UTC | Jul 12, 14:25 UTC | 8h 20m |
| 2026-07-03 | CAL783 | - | Jul 3, 06:00 UTC | Jul 3, 14:10 UTC | 8h 10m |
| 2026-07-02 | CAL722 | - | Jul 2, 07:30 UTC | Jul 2, 11:45 UTC | 4h 15m |
| 2026-07-02 | CAL721 | - | Jul 2, 01:15 UTC | Jul 2, 05:25 UTC | 4h 10m |
| 2026-07-01 | CAL031 | YVR → TPE | Jul 1, 09:05 UTC | Jul 1, 21:05 UTC | 12h 0m |
| 2026-06-30 | CAL032 | TPE → YVR | Jun 30, 18:10 UTC | Jul 1, 02:25 UTC | 8h 15m |
| 2026-06-30 | CAL032 | TPE → YVR | Jun 30, 16:15 UTC | Jun 30, 16:30 UTC | 15m |
| 2026-06-30 | CAL153 | - | Jun 30, 05:20 UTC | Jun 30, 07:45 UTC | 2h 25m |
| 2026-06-30 | CAL152 | - | Jun 30, 02:55 UTC | Jun 30, 03:35 UTC | 40m |
| 2026-06-30 | CAL152 | - | Jun 30, 01:25 UTC | Jun 30, 01:35 UTC | 11m |
| 2026-06-29 | CAL783 | - | Jun 29, 06:05 UTC | Jun 29, 13:54 UTC | 7h 50m |
| 2026-06-26 | CAL153 | - | Jun 26, 07:39 UTC | Jun 26, 08:05 UTC | 25m |
| 2026-06-26 | CAL153 | - | Jun 26, 05:35 UTC | Jun 26, 06:09 UTC | 35m |
| 2026-06-26 | CAL152 | TPE → KIX | Jun 26, 01:29 UTC | Jun 26, 03:34 UTC | 2h 5m |
| 2026-06-25 | CAL157 | KIX → TPE | Jun 25, 04:29 UTC | Jun 25, 06:50 UTC | 2h 20m |
| 2026-06-25 | CAL156 | - | Jun 25, 00:44 UTC | Jun 25, 02:54 UTC | 2h 10m |
| 2026-06-24 | CAL007 | - | Jun 24, 07:40 UTC | Jun 24, 20:49 UTC | 13h 10m |
| 2026-06-23 | CAL008 | - | Jun 23, 18:20 UTC | Jun 24, 03:29 UTC | 9h 10m |
| 2026-06-23 | CAL008 | - | Jun 23, 16:24 UTC | Jun 23, 16:35 UTC | 10m |
| 2026-06-23 | CAL772 | - | Jun 23, 02:20 UTC | Jun 23, 13:09 UTC | 10h 50m |
| 2026-06-22 | CAL007 | - | Jun 22, 07:30 UTC | Jun 22, 20:30 UTC | 13h 0m |
| 2026-06-21 | CAL008 | - | Jun 21, 16:25 UTC | Jun 22, 03:54 UTC | 11h 30m |
| 2026-06-21 | CAL783 | TPE → TPE | Jun 21, 06:04 UTC | Jun 21, 14:10 UTC | 8h 5m |
| 2026-06-19 | CAL781 | - | Jun 19, 23:34 UTC | Jun 20, 07:14 UTC | 7h 40m |
| 2026-06-19 | CAL007 | - | Jun 19, 20:24 UTC | Jun 19, 20:40 UTC | 15m |
| 2026-06-19 | CAL007 | - | Jun 19, 07:59 UTC | Jun 19, 18:54 UTC | 10h 55m |
| 2026-06-18 | CAL008 | - | Jun 18, 17:10 UTC | Jun 19, 04:54 UTC | 11h 44m |
| 2026-06-18 | CAL772 | - | Jun 18, 02:00 UTC | Jun 18, 13:15 UTC | 11h 15m |
| 2026-06-17 | CAL772 | TPE → TPE | Jun 17, 02:00 UTC | Jun 17, 13:25 UTC | 11h 25m |
| 2026-06-16 | CAL007 | - | Jun 16, 07:30 UTC | Jun 16, 20:50 UTC | 13h 21m |
| 2026-06-15 | CAL008 | - | Jun 15, 16:30 UTC | Jun 16, 04:05 UTC | 11h 35m |
| 2026-06-15 | CAL783 | TPE → TPE | Jun 15, 06:20 UTC | Jun 15, 14:10 UTC | 7h 50m |
| 2026-06-14 | CAL003 | - | Jun 14, 08:30 UTC | Jun 14, 21:05 UTC | 12h 35m |
| 2026-06-13 | CAL004 | - | Jun 13, 17:40 UTC | Jun 14, 02:20 UTC | 8h 40m |
| 2026-06-13 | CAL004 | - | Jun 13, 16:00 UTC | Jun 13, 16:15 UTC | 15m |
| 2026-06-12 | CAL782 | - | Jun 12, 23:30 UTC | Jun 13, 07:10 UTC | 7h 39m |
| 2026-06-12 | CAL007 | - | Jun 12, 07:45 UTC | Jun 12, 21:05 UTC | 13h 20m |
| 2026-06-11 | CAL008 | - | Jun 11, 19:20 UTC | Jun 12, 04:15 UTC | 8h 55m |
| 2026-06-11 | CAL008 | - | Jun 11, 17:30 UTC | Jun 11, 17:45 UTC | 15m |
| 2026-06-11 | CAL772 | DPS → TPE | Jun 11, 01:30 UTC | Jun 11, 12:40 UTC | 11h 10m |
| 2026-06-10 | CAL007 | - | Jun 10, 07:30 UTC | Jun 10, 20:55 UTC | 13h 25m |
| 2026-06-09 | CAL008 | - | Jun 9, 17:55 UTC | Jun 10, 03:35 UTC | 9h 40m |
| 2026-06-09 | CAL772 | DPS → TPE | Jun 9, 01:40 UTC | Jun 9, 12:40 UTC | 11h 0m |
| 2026-06-08 | CAL007 | - | Jun 8, 07:30 UTC | Jun 8, 21:05 UTC | 13h 35m |
| 2026-06-07 | CAL008 | - | Jun 7, 16:15 UTC | Jun 8, 03:25 UTC | 11h 10m |
| 2026-06-06 | CAL781 | TPE → SGN | Jun 6, 23:44 UTC | Jun 7, 07:15 UTC | 7h 30m |
| 2026-06-06 | CAL007 | LAX → TPE | Jun 6, 07:30 UTC | Jun 6, 20:49 UTC | 13h 20m |
| 2026-06-05 | CAL008 | - | Jun 5, 18:25 UTC | Jun 6, 03:40 UTC | 9h 15m |
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-18001 page for operator, model, and routing details .