sensors Mode-S transponder
78102A
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-1550 · BOEING 737-800
- Hex
- 78102A
- Octal
- 36010052
- Decimal
- 7,868,458
- Country
- CN
- Tail
- B-1550
- Type
- B738
- Flights observed
- 31
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 3d ago
Last known position
Country allocation
The ICAO 24-bit address 78102A falls within the block assigned to China (CN) by ICAO Annex 10, Volume III. Every aircraft registered in China 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 |
|---|---|---|---|
| CXA8321 | Xiamen Airlines | 4 | 2026-05-21 |
| CXA8692 | - | 2 | 2026-04-21 |
| CXA8691 | - | 2 | 2026-04-21 |
| CXA8555 | Xiamen Airlines | 2 | 2026-05-23 |
| CXA8222 | - | 2 | 2026-04-26 |
| CXA8221 | - | 2 | 2026-04-27 |
| CXA8868 | - | 1 | 2026-04-13 |
| CXA8867 | - | 1 | 2026-04-13 |
| CXA8827 | Xiamen Airlines | 1 | 2026-05-05 |
| CXA8818 | Xiamen Airlines | 1 | 2026-05-22 |
| CXA8781 | Xiamen Airlines | 1 | 2026-05-03 |
| CXA8624 | - | 1 | 2026-05-17 |
| CXA8623 | - | 1 | 2026-05-17 |
| CXA8616 | - | 1 | 2026-05-09 |
| CXA8526 | - | 1 | 2026-05-02 |
| CXA8385 | - | 1 | 2026-05-07 |
| CXA8344 | Xiamen Airlines | 1 | 2026-05-05 |
| CXA8322 | Xiamen Airlines | 1 | 2026-05-21 |
| CXA818 | - | 1 | 2026-05-06 |
| CXA817 | - | 1 | 2026-05-06 |
Recent flights last 31
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-27 | CXA8070 | CGQ → HGH | May 27, 08:05 UTC | May 27, 12:15 UTC | 4h 10m |
| 2026-05-23 | CXA8555 | PKX → PVG | May 23, 00:45 UTC | May 23, 10:10 UTC | 9h 24m |
| 2026-05-22 | CXA8555 | PKX → PVG | May 22, 09:10 UTC | May 23, 01:20 UTC | 16h 10m |
| 2026-05-22 | CXA8818 | HRB → HGH | May 22, 00:35 UTC | May 22, 10:00 UTC | 9h 25m |
| 2026-05-21 | CXA8322 | SYX → HGH | May 21, 04:30 UTC | May 22, 01:10 UTC | 20h 40m |
| 2026-05-21 | CXA8321 | HGH → SYX | May 21, 00:20 UTC | May 21, 04:30 UTC | 4h 10m |
| 2026-05-19 | CXA8321 | HGH → SYX | May 19, 00:30 UTC | May 19, 04:25 UTC | 3h 55m |
| 2026-05-18 | CXA8321 | HGH → SYX | May 18, 06:35 UTC | May 19, 04:25 UTC | 21h 49m |
| 2026-05-18 | CXA8321 | HGH → SYX | May 18, 05:45 UTC | May 19, 04:25 UTC | 22h 39m |
| 2026-05-17 | CXA8624 | - | May 17, 05:40 UTC | May 17, 05:50 UTC | 10m |
| 2026-05-17 | CXA8623 | - | May 17, 01:25 UTC | May 17, 01:35 UTC | 10m |
| 2026-05-13 | CXA8076 | CGQ → NGB | May 13, 06:20 UTC | May 13, 06:50 UTC | 30m |
| 2026-05-11 | CXA8044 | CGQ → HGH | May 11, 06:35 UTC | May 11, 07:10 UTC | 35m |
| 2026-05-09 | CXA8616 | - | May 9, 03:50 UTC | May 9, 04:10 UTC | 20m |
| 2026-05-07 | CXA8385 | - | May 7, 01:00 UTC | May 7, 01:20 UTC | 20m |
| 2026-05-06 | CXA818 | - | May 6, 10:35 UTC | May 6, 11:45 UTC | 1h 10m |
| 2026-05-06 | CXA817 | - | May 6, 07:20 UTC | May 6, 08:30 UTC | 1h 10m |
| 2026-05-05 | CXA8344 | SZX → HGH | May 5, 14:25 UTC | May 5, 14:35 UTC | 10m |
| 2026-05-05 | CXA8827 | XMN → ZUH | May 5, 12:40 UTC | May 5, 12:55 UTC | 15m |
| 2026-05-03 | CXA8781 | SHE → FOC | May 3, 23:15 UTC | May 4, 08:00 UTC | 8h 45m |
| 2026-05-02 | CXA8526 | - | May 2, 01:25 UTC | May 2, 02:05 UTC | 40m |
| 2026-04-27 | CXA8221 | - | Apr 27, 05:45 UTC | Apr 27, 05:55 UTC | 10m |
| 2026-04-26 | CXA8221 | - | Apr 26, 05:50 UTC | Apr 26, 06:00 UTC | 10m |
| 2026-04-26 | CXA8222 | - | Apr 26, 03:40 UTC | Apr 26, 03:50 UTC | 10m |
| 2026-04-21 | CXA8692 | - | Apr 21, 04:40 UTC | Apr 21, 05:00 UTC | 20m |
| 2026-04-21 | CXA8691 | - | Apr 21, 02:55 UTC | Apr 21, 03:25 UTC | 30m |
| 2026-04-17 | CXA8222 | - | Apr 17, 04:15 UTC | Apr 17, 04:30 UTC | 15m |
| 2026-04-16 | CXA8692 | - | Apr 16, 04:49 UTC | Apr 16, 05:05 UTC | 15m |
| 2026-04-16 | CXA8691 | - | Apr 16, 02:40 UTC | Apr 16, 03:04 UTC | 25m |
| 2026-04-13 | CXA8868 | - | Apr 13, 09:50 UTC | Apr 13, 10:05 UTC | 15m |
| 2026-04-13 | CXA8867 | - | Apr 13, 04:50 UTC | Apr 13, 05:15 UTC | 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-1550 page for operator, model, and routing details .