sensors Mode-S transponder
782019
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-224F · BOEING 737 MAX 8
- Hex
- 782019
- Octal
- 36020031
- Decimal
- 7,872,537
- Country
- CN
- Tail
- B-224F
- Type
- B38M
- Flights observed
- 29
- Distinct callsigns
- 8
- Country
- CN
- Last broadcast
- 11d ago
Last known position
Country allocation
The ICAO 24-bit address 782019 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 8 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CHH7266 | - | 7 | 2026-07-05 |
| CHH7265 | - | 6 | 2026-06-29 |
| CHH7512 | - | 5 | 2026-06-27 |
| CHH7522 | Hainan Airlines | 3 | 2026-06-07 |
| CHH7366 | - | 2 | 2026-07-06 |
| CHH7872 | - | 1 | 2026-06-18 |
| CHH7569 | Hainan Airlines | 1 | 2026-06-03 |
| CHH7365 | - | 1 | 2026-06-22 |
Recent flights last 29
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-06 | - | - | Jul 6, 14:15 UTC | Jul 6, 14:30 UTC | 15m |
| 2026-07-06 | CHH7366 | - | Jul 6, 12:15 UTC | Jul 6, 12:25 UTC | 10m |
| 2026-07-05 | CHH7266 | - | Jul 5, 04:30 UTC | Jul 5, 04:40 UTC | 10m |
| 2026-07-04 | CHH7266 | - | Jul 4, 06:20 UTC | Jul 5, 04:40 UTC | 22h 20m |
| 2026-07-04 | - | - | Jul 4, 03:20 UTC | Jul 4, 06:25 UTC | 3h 5m |
| 2026-06-29 | CHH7266 | - | Jun 29, 10:59 UTC | Jun 30, 05:50 UTC | 18h 51m |
| 2026-06-29 | CHH7265 | - | Jun 29, 05:45 UTC | Jun 30, 03:30 UTC | 21h 46m |
| 2026-06-27 | CHH7512 | - | Jun 27, 04:00 UTC | Jun 27, 04:09 UTC | 10m |
| 2026-06-22 | CHH7365 | - | Jun 22, 13:14 UTC | Jun 22, 13:25 UTC | 10m |
| 2026-06-22 | CHH7265 | HAK → XIY | Jun 22, 05:44 UTC | Jun 22, 11:14 UTC | 5h 30m |
| 2026-06-21 | CHH7266 | XIY → HAK | Jun 21, 13:24 UTC | Jun 22, 03:24 UTC | 14h 0m |
| 2026-06-21 | CHH7366 | - | Jun 21, 05:49 UTC | Jun 21, 11:24 UTC | 5h 35m |
| 2026-06-21 | CHH7266 | XIY → HAK | Jun 21, 03:19 UTC | Jun 21, 03:34 UTC | 15m |
| 2026-06-20 | CHH7512 | - | Jun 20, 03:59 UTC | Jun 20, 04:14 UTC | 15m |
| 2026-06-19 | CHH7265 | HAK → XIY | Jun 19, 05:34 UTC | Jun 19, 05:45 UTC | 10m |
| 2026-06-19 | CHH7266 | XIY → HAK | Jun 19, 03:05 UTC | Jun 19, 03:29 UTC | 25m |
| 2026-06-18 | CHH7872 | - | Jun 18, 07:25 UTC | Jun 18, 07:35 UTC | 10m |
| 2026-06-17 | CHH7265 | HAK → XIY | Jun 17, 03:45 UTC | Jun 17, 06:00 UTC | 2h 15m |
| 2026-06-16 | CHH7512 | - | Jun 16, 04:05 UTC | Jun 16, 04:20 UTC | 15m |
| 2026-06-14 | CHH7512 | ZUH → XIY | Jun 14, 04:00 UTC | Jun 14, 04:10 UTC | 10m |
| 2026-06-12 | CHH7265 | HAK → XIY | Jun 12, 11:25 UTC | Jun 13, 05:45 UTC | 18h 19m |
| 2026-06-12 | CHH7265 | HAK → XIY | Jun 12, 05:50 UTC | Jun 12, 13:35 UTC | 7h 45m |
| 2026-06-12 | CHH7266 | XIY → HAK | Jun 12, 03:20 UTC | Jun 12, 03:30 UTC | 10m |
| 2026-06-07 | CHH7522 | ZUH → XIY | Jun 7, 12:35 UTC | Jun 7, 12:45 UTC | 10m |
| 2026-06-03 | CHH7569 | XIY → SHE | Jun 3, 02:55 UTC | Jun 3, 03:10 UTC | 15m |
| 2026-06-02 | CHH7522 | ZUH → XIY | Jun 2, 12:45 UTC | Jun 2, 12:55 UTC | 10m |
| 2026-06-01 | CHH7522 | ZUH → XIY | Jun 1, 12:35 UTC | Jun 1, 12:50 UTC | 15m |
| 2026-05-19 | - | - | May 19, 12:25 UTC | May 19, 12:35 UTC | 10m |
| 2026-04-18 | CHH7512 | ZUH → XIY | Apr 18, 04:00 UTC | Apr 18, 04:10 UTC | 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-224F page for operator, model, and routing details .