sensors Mode-S transponder
780B2A
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-8271 · GULFSTREAM 4
- Hex
- 780B2A
- Octal
- 36005452
- Decimal
- 7,867,178
- Country
- CN
- Tail
- B-8271
- Type
- GLF4
- Flights observed
- 30
- Distinct callsigns
- 6
- Country
- CN
- Last broadcast
- 2d ago
Last known position
Country allocation
The ICAO 24-bit address 780B2A 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 6 distinct
Recent flights last 30
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-12 | NSJ171 | - | Jun 12, 10:40 UTC | Jun 12, 10:55 UTC | 15m |
| 2026-06-12 | NSJ171 | - | Jun 12, 08:00 UTC | Jun 12, 08:10 UTC | 10m |
| 2026-06-11 | B8271 | - | Jun 11, 09:20 UTC | Jun 11, 09:30 UTC | 10m |
| 2026-06-08 | B8271 | - | Jun 8, 12:20 UTC | Jun 8, 12:50 UTC | 30m |
| 2026-06-06 | B8271 | - | Jun 6, 14:59 UTC | Jun 6, 15:19 UTC | 20m |
| 2026-06-06 | B8271 | - | Jun 6, 08:55 UTC | Jun 6, 13:05 UTC | 4h 10m |
| 2026-05-30 | NSJ701 | - | May 30, 22:20 UTC | May 30, 22:40 UTC | 20m |
| 2026-05-29 | B8271 | - | May 29, 17:25 UTC | May 29, 21:00 UTC | 3h 35m |
| 2026-05-29 | B8271 | - | May 29, 15:20 UTC | May 29, 15:45 UTC | 25m |
| 2026-05-25 | B8271 | - | May 25, 19:44 UTC | May 25, 20:04 UTC | 20m |
| 2026-05-25 | B8271 | - | May 25, 15:05 UTC | May 25, 18:55 UTC | 3h 50m |
| 2026-05-24 | B8271 | - | May 24, 21:10 UTC | May 25, 18:55 UTC | 21h 45m |
| 2026-05-24 | B8271 | - | May 24, 17:40 UTC | May 25, 15:15 UTC | 21h 35m |
| 2026-05-20 | B8271 | - | May 20, 17:05 UTC | May 20, 18:05 UTC | 1h 0m |
| 2026-05-19 | B8271 | - | May 19, 20:45 UTC | May 20, 18:05 UTC | 21h 21m |
| 2026-05-19 | B8271 | - | May 19, 17:15 UTC | May 19, 20:50 UTC | 3h 35m |
| 2026-05-19 | B8271 | - | May 19, 15:15 UTC | May 19, 15:45 UTC | 30m |
| 2026-05-15 | B8271 | - | May 15, 19:40 UTC | May 15, 19:55 UTC | 15m |
| 2026-05-15 | B8271 | ICN → TBS | May 15, 01:05 UTC | May 15, 18:55 UTC | 17h 49m |
| 2026-05-12 | B8271 | - | May 12, 03:10 UTC | May 12, 03:50 UTC | 40m |
| 2026-05-11 | NSJ752 | - | May 11, 06:20 UTC | May 11, 06:30 UTC | 10m |
| 2026-05-05 | NSJ702 | - | May 5, 22:50 UTC | May 5, 23:05 UTC | 15m |
| 2026-05-04 | B8271 | - | May 4, 08:05 UTC | May 4, 08:20 UTC | 15m |
| 2026-05-03 | B8271 | - | May 3, 09:55 UTC | May 3, 10:45 UTC | 50m |
| 2026-05-03 | B8271 | - | May 3, 07:40 UTC | May 3, 08:00 UTC | 20m |
| 2026-04-30 | B8271 | - | Apr 30, 06:25 UTC | Apr 30, 06:45 UTC | 20m |
| 2026-04-30 | B8271 | - | Apr 30, 04:20 UTC | Apr 30, 04:30 UTC | 10m |
| 2026-04-29 | B8271 | - | Apr 29, 07:40 UTC | Apr 29, 11:00 UTC | 3h 21m |
| 2026-04-17 | NSJ506 | - | Apr 17, 10:20 UTC | Apr 17, 10:35 UTC | 15m |
| 2026-04-13 | B8271 | - | Apr 13, 01:20 UTC | Apr 13, 01:40 UTC | 20m |
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-8271 page for operator, model, and routing details .