sensors Mode-S transponder
78129C
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-1347 · BOEING 737-800
- Hex
- 78129C
- Octal
- 36011234
- Decimal
- 7,869,084
- Country
- CN
- Tail
- B-1347
- Type
- B738
- Flights observed
- 88
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 20h ago
Last known position
Country allocation
The ICAO 24-bit address 78129C 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 |
|---|---|---|---|
| CHH7191 | Hainan Airlines | 8 | 2026-06-13 |
| CHH7056 | Hainan Airlines | 6 | 2026-05-14 |
| CHH7052 | Hainan Airlines | 6 | 2026-05-14 |
| CHH7054 | Hainan Airlines | 5 | 2026-05-09 |
| CHH7212 | Hainan Airlines | 4 | 2026-04-29 |
| CHH7211 | Hainan Airlines | 4 | 2026-04-28 |
| CHH7672 | - | 3 | 2026-07-18 |
| CHH7671 | - | 3 | 2026-07-18 |
| CHH7648 | - | 2 | 2026-06-26 |
| CHH7528 | - | 2 | 2026-06-30 |
| CHH7492 | Hainan Airlines | 2 | 2026-04-26 |
| CHH7419 | Hainan Airlines | 2 | 2026-06-26 |
| CHH7370 | - | 2 | 2026-06-23 |
| CHH7295 | Hainan Airlines | 2 | 2026-05-28 |
| CHH7055 | Hainan Airlines | 2 | 2026-05-17 |
| CHH7982 | - | 1 | 2026-07-04 |
| CHH7981 | - | 1 | 2026-07-04 |
| CHH7874 | - | 1 | 2026-06-17 |
| CHH7872 | Hainan Airlines | 1 | 2026-06-08 |
| CHH7807 | - | 1 | 2026-07-03 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-18 | CHH7672 | - | Jul 18, 15:05 UTC | Jul 18, 15:25 UTC | 20m |
| 2026-07-18 | CHH7671 | - | Jul 18, 06:55 UTC | Jul 18, 07:20 UTC | 25m |
| 2026-07-14 | CHH7672 | - | Jul 14, 14:50 UTC | Jul 14, 15:15 UTC | 25m |
| 2026-07-14 | CHH7671 | - | Jul 14, 06:55 UTC | Jul 14, 07:25 UTC | 30m |
| 2026-07-12 | CHH7103 | - | Jul 12, 15:15 UTC | Jul 12, 15:25 UTC | 10m |
| 2026-07-07 | CHH461 | - | Jul 7, 12:15 UTC | Jul 8, 06:55 UTC | 18h 40m |
| 2026-07-07 | CHH720 | - | Jul 7, 08:45 UTC | Jul 7, 09:00 UTC | 15m |
| 2026-07-07 | CHH719 | - | Jul 7, 06:15 UTC | Jul 7, 06:35 UTC | 20m |
| 2026-07-04 | CHH7982 | - | Jul 4, 04:00 UTC | Jul 4, 04:20 UTC | 20m |
| 2026-07-04 | CHH7981 | - | Jul 4, 00:25 UTC | Jul 4, 01:50 UTC | 1h 25m |
| 2026-07-03 | CHH7807 | - | Jul 3, 04:45 UTC | Jul 3, 05:05 UTC | 20m |
| 2026-07-02 | CHH7668 | - | Jul 2, 02:25 UTC | Jul 2, 09:20 UTC | 6h 55m |
| 2026-07-01 | CHH7750 | - | Jul 1, 15:25 UTC | Jul 1, 15:35 UTC | 10m |
| 2026-07-01 | CHH7762 | - | Jul 1, 04:30 UTC | Jul 1, 04:50 UTC | 20m |
| 2026-06-30 | CHH7761 | - | Jun 30, 22:30 UTC | Jun 30, 22:40 UTC | 10m |
| 2026-06-30 | CHH7528 | - | Jun 30, 05:35 UTC | Jun 30, 13:05 UTC | 7h 30m |
| 2026-06-29 | CHH7528 | - | Jun 29, 15:00 UTC | Jun 30, 13:00 UTC | 22h 0m |
| 2026-06-28 | CHH7688 | - | Jun 28, 10:30 UTC | Jun 28, 10:50 UTC | 20m |
| 2026-06-26 | CHH7419 | LNL → LHW | Jun 26, 14:09 UTC | Jun 27, 08:25 UTC | 18h 15m |
| 2026-06-26 | CHH7648 | - | Jun 26, 11:30 UTC | Jun 27, 08:25 UTC | 20h 55m |
| 2026-06-26 | CHH7648 | - | Jun 26, 02:50 UTC | Jun 26, 23:25 UTC | 20h 35m |
| 2026-06-25 | CHH7015 | - | Jun 25, 11:25 UTC | Jun 25, 11:39 UTC | 15m |
| 2026-06-24 | CHH7419 | LNL → LHW | Jun 24, 23:00 UTC | Jun 25, 08:40 UTC | 9h 40m |
| 2026-06-24 | CHH7369 | - | Jun 24, 00:30 UTC | Jun 24, 10:04 UTC | 9h 35m |
| 2026-06-23 | CHH7078 | - | Jun 23, 09:49 UTC | Jun 24, 06:39 UTC | 20h 50m |
| 2026-06-23 | CHH7370 | - | Jun 23, 04:00 UTC | Jun 24, 00:44 UTC | 20h 45m |
| 2026-06-23 | CHH7370 | - | Jun 23, 00:39 UTC | Jun 23, 10:04 UTC | 9h 25m |
| 2026-06-18 | CHH7265 | HAK → XIY | Jun 18, 03:20 UTC | Jun 18, 11:20 UTC | 8h 0m |
| 2026-06-17 | CHH7874 | - | Jun 17, 10:40 UTC | Jun 17, 10:55 UTC | 15m |
| 2026-06-13 | CHH7191 | PEK → XMN | Jun 13, 00:20 UTC | Jun 13, 00:35 UTC | 15m |
| 2026-06-12 | CHH7296 | - | Jun 12, 15:25 UTC | Jun 12, 15:35 UTC | 10m |
| 2026-06-12 | CHH7195 | PEK → FOC | Jun 12, 01:15 UTC | Jun 12, 01:30 UTC | 15m |
| 2026-06-11 | CHH7435 | HGH → HET | Jun 11, 09:10 UTC | Jun 11, 09:30 UTC | 20m |
| 2026-06-11 | CHH7191 | PEK → XMN | Jun 11, 00:15 UTC | Jun 11, 00:30 UTC | 15m |
| 2026-06-08 | CHH7872 | SZX → XIY | Jun 8, 05:05 UTC | Jun 8, 05:15 UTC | 10m |
| 2026-06-04 | CHH7322 | PVG → SYX | Jun 4, 23:55 UTC | Jun 5, 05:45 UTC | 5h 50m |
| 2026-06-04 | CHH7725 | SZX → PVG | Jun 4, 04:50 UTC | Jun 4, 05:00 UTC | 10m |
| 2026-06-04 | CHH7726 | PVG → SZX | Jun 4, 00:50 UTC | Jun 4, 01:05 UTC | 15m |
| 2026-05-29 | CHH7237 | PEK → XIY | May 29, 03:15 UTC | May 29, 03:30 UTC | 15m |
| 2026-05-28 | CHH7295 | PEK → FOC | May 28, 09:35 UTC | May 28, 09:45 UTC | 10m |
| 2026-05-27 | CHH7193 | - | May 27, 12:15 UTC | May 27, 12:30 UTC | 15m |
| 2026-05-27 | CHH7238 | XIY → PEK | May 27, 07:35 UTC | May 27, 08:10 UTC | 35m |
| 2026-05-22 | CHH7512 | ZUH → XIY | May 22, 04:00 UTC | May 22, 04:10 UTC | 10m |
| 2026-05-20 | CHH7672 | - | May 20, 14:55 UTC | May 20, 15:20 UTC | 25m |
| 2026-05-20 | CHH7671 | - | May 20, 07:30 UTC | May 20, 08:00 UTC | 30m |
| 2026-05-17 | CHH7055 | HAK → HGH | May 17, 00:30 UTC | May 17, 14:01 UTC | 13h 30m |
| 2026-05-14 | CHH7056 | HGH → HAK | May 14, 14:20 UTC | May 15, 06:50 UTC | 16h 30m |
| 2026-05-14 | CHH7055 | HAK → HGH | May 14, 09:35 UTC | May 15, 06:50 UTC | 21h 15m |
| 2026-05-14 | CHH7052 | HGH → HAK | May 14, 06:10 UTC | May 15, 01:50 UTC | 19h 40m |
| 2026-05-13 | CHH7052 | HGH → HAK | May 13, 13:31 UTC | May 14, 09:50 UTC | 20h 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-1347 page for operator, model, and routing details .