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
- 52
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 7m 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 | 6 | 2026-04-26 |
| 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 |
| CHH7492 | Hainan Airlines | 2 | 2026-04-26 |
| CHH7295 | Hainan Airlines | 2 | 2026-05-28 |
| CHH7055 | Hainan Airlines | 2 | 2026-05-17 |
| CHH7726 | Hainan Airlines | 1 | 2026-06-04 |
| CHH7725 | Hainan Airlines | 1 | 2026-06-04 |
| CHH7672 | - | 1 | 2026-05-20 |
| CHH7671 | - | 1 | 2026-05-20 |
| CHH7512 | Hainan Airlines | 1 | 2026-05-22 |
| CHH7491 | Hainan Airlines | 1 | 2026-04-24 |
| CHH7488 | Hainan Airlines | 1 | 2026-05-03 |
| CHH7268 | - | 1 | 2026-04-20 |
| CHH7267 | Hainan Airlines | 1 | 2026-04-20 |
| CHH7238 | Hainan Airlines | 1 | 2026-05-27 |
| CHH7237 | Hainan Airlines | 1 | 2026-05-29 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 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 |
| 2026-05-13 | CHH7052 | HGH → HAK | May 13, 09:05 UTC | May 14, 06:35 UTC | 21h 30m |
| 2026-05-13 | CHH7056 | HGH → HAK | May 13, 01:20 UTC | May 13, 13:50 UTC | 12h 30m |
| 2026-05-12 | CHH7056 | HGH → HAK | May 12, 13:25 UTC | May 13, 09:15 UTC | 19h 50m |
| 2026-05-12 | CHH7056 | HGH → HAK | May 12, 08:35 UTC | May 13, 06:15 UTC | 21h 40m |
| 2026-05-12 | CHH7052 | HGH → HAK | May 12, 05:40 UTC | May 13, 01:25 UTC | 19h 45m |
| 2026-05-10 | CHH7052 | HGH → HAK | May 10, 01:09 UTC | May 10, 13:40 UTC | 12h 30m |
| 2026-05-09 | CHH7052 | HGH → HAK | May 9, 13:25 UTC | May 10, 09:45 UTC | 20h 20m |
| 2026-05-09 | CHH7056 | HGH → HAK | May 9, 06:05 UTC | May 10, 01:14 UTC | 19h 10m |
| 2026-05-09 | CHH7056 | HGH → HAK | May 9, 03:05 UTC | May 10, 01:14 UTC | 22h 10m |
| 2026-05-09 | CHH7054 | HGH → HAK | May 9, 02:40 UTC | May 9, 13:50 UTC | 11h 10m |
| 2026-05-08 | CHH7054 | HGH → HAK | May 8, 06:14 UTC | May 9, 03:10 UTC | 20h 55m |
| 2026-05-08 | CHH7054 | HGH → HAK | May 8, 03:04 UTC | May 9, 03:00 UTC | 23h 55m |
| 2026-05-06 | CHH7054 | HGH → HAK | May 6, 12:45 UTC | May 7, 03:00 UTC | 14h 14m |
| 2026-05-04 | CHH7054 | HGH → HAK | May 4, 12:40 UTC | May 5, 06:00 UTC | 17h 21m |
| 2026-05-03 | CHH7488 | CGQ → HGH | May 3, 13:05 UTC | May 4, 12:40 UTC | 23h 35m |
| 2026-04-29 | CHH7153 | CAN → URC | Apr 29, 10:10 UTC | Apr 29, 10:30 UTC | 20m |
| 2026-04-29 | CHH7212 | KMG → PEK | Apr 29, 07:24 UTC | Apr 29, 07:50 UTC | 25m |
| 2026-04-28 | CHH7211 | PEK → KMG | Apr 28, 23:50 UTC | Apr 29, 00:10 UTC | 20m |
| 2026-04-28 | CHH7212 | KMG → PEK | Apr 28, 07:40 UTC | Apr 28, 08:00 UTC | 20m |
| 2026-04-27 | CHH7211 | PEK → KMG | Apr 27, 23:40 UTC | Apr 28, 00:10 UTC | 30m |
| 2026-04-27 | CHH7212 | KMG → PEK | Apr 27, 07:30 UTC | Apr 27, 07:40 UTC | 10m |
| 2026-04-26 | CHH7211 | PEK → KMG | Apr 26, 23:55 UTC | Apr 27, 00:10 UTC | 15m |
| 2026-04-26 | CHH7492 | XMN → PEK | Apr 26, 15:35 UTC | Apr 26, 15:45 UTC | 10m |
| 2026-04-26 | CHH7191 | PEK → XMN | Apr 26, 00:15 UTC | Apr 26, 00:25 UTC | 10m |
| 2026-04-25 | CHH7134 | - | Apr 25, 16:20 UTC | Apr 25, 16:35 UTC | 15m |
| 2026-04-24 | CHH7491 | PEK → XMN | Apr 24, 08:50 UTC | Apr 24, 09:05 UTC | 15m |
| 2026-04-24 | CHH7191 | PEK → XMN | Apr 24, 00:20 UTC | Apr 24, 00:30 UTC | 10m |
| 2026-04-23 | CHH7492 | XMN → PEK | Apr 23, 15:45 UTC | Apr 23, 15:55 UTC | 10m |
| 2026-04-23 | CHH7191 | PEK → XMN | Apr 23, 00:10 UTC | Apr 23, 00:20 UTC | 10m |
| 2026-04-22 | CHH7191 | PEK → XMN | Apr 22, 00:15 UTC | Apr 22, 00:25 UTC | 10m |
| 2026-04-21 | CHH7191 | PEK → XMN | Apr 21, 00:10 UTC | Apr 21, 00:25 UTC | 15m |
| 2026-04-20 | CHH7268 | - | Apr 20, 15:25 UTC | Apr 20, 15:35 UTC | 10m |
| 2026-04-20 | CHH7267 | PEK → CKG | Apr 20, 09:45 UTC | Apr 20, 10:05 UTC | 20m |
| 2026-04-20 | CHH7191 | PEK → XMN | Apr 20, 00:10 UTC | Apr 20, 00:20 UTC | 10m |
| 2026-04-19 | CHH7295 | PEK → FOC | Apr 19, 09:25 UTC | Apr 19, 09:35 UTC | 10m |
| 2026-04-19 | CHH7212 | KMG → PEK | Apr 19, 07:10 UTC | Apr 19, 07:30 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-1347 page for operator, model, and routing details .