sensors Mode-S transponder
7820BA
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-225J · BOEING 737 MAX 8
- Hex
- 7820BA
- Octal
- 36020272
- Decimal
- 7,872,698
- Country
- CN
- Tail
- B-225J
- Type
- B38M
- Flights observed
- 73
- Distinct callsigns
- 17
- Country
- CN
- Last broadcast
- 14h ago
Last known position
Country allocation
The ICAO 24-bit address 7820BA 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 17 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CHH7334 | Hainan Airlines | 23 | 2026-05-06 |
| CHH6034 | Hainan Airlines | 11 | 2026-05-29 |
| CHH6033 | Hainan Airlines | 10 | 2026-05-29 |
| CHH7333 | Hainan Airlines | 6 | 2026-05-07 |
| CHH7048 | - | 5 | 2026-04-14 |
| CHH7744 | Hainan Airlines | 3 | 2026-05-01 |
| CHH7750 | Hainan Airlines | 2 | 2026-05-01 |
| CHH7743 | Hainan Airlines | 2 | 2026-04-27 |
| CHH7312 | Hainan Airlines | 2 | 2026-04-27 |
| CHH7045 | Hainan Airlines | 2 | 2026-06-02 |
| CHH7749 | Hainan Airlines | 1 | 2026-04-27 |
| CHH7384 | Hainan Airlines | 1 | 2026-05-12 |
| CHH7383 | Hainan Airlines | 1 | 2026-05-14 |
| CHH7325 | Hainan Airlines | 1 | 2026-05-28 |
| CHH7116 | Hainan Airlines | 1 | 2026-04-15 |
| CHH7094 | Hainan Airlines | 1 | 2026-06-01 |
| CHH7027 | - | 1 | 2026-04-15 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-02 | CHH7045 | ZUH → TYN | Jun 2, 05:40 UTC | Jun 2, 05:50 UTC | 10m |
| 2026-06-01 | CHH7094 | KMG → HAK | Jun 1, 06:45 UTC | Jun 1, 10:45 UTC | 4h 0m |
| 2026-05-30 | CHH7045 | ZUH → TYN | May 30, 05:30 UTC | May 30, 05:40 UTC | 10m |
| 2026-05-29 | CHH6034 | FOC → ZUH | May 29, 14:40 UTC | May 29, 15:10 UTC | 30m |
| 2026-05-29 | CHH6033 | ZUH → FOC | May 29, 11:35 UTC | May 29, 11:55 UTC | 20m |
| 2026-05-28 | CHH7325 | SYX → WMT | May 28, 01:05 UTC | May 28, 06:10 UTC | 5h 5m |
| 2026-05-26 | CHH6034 | FOC → ZUH | May 26, 14:35 UTC | May 26, 14:55 UTC | 20m |
| 2026-05-26 | CHH6033 | ZUH → FOC | May 26, 10:10 UTC | May 26, 10:25 UTC | 15m |
| 2026-05-24 | CHH6034 | FOC → ZUH | May 24, 14:40 UTC | May 24, 15:05 UTC | 25m |
| 2026-05-24 | CHH6033 | ZUH → FOC | May 24, 11:35 UTC | May 24, 11:50 UTC | 15m |
| 2026-05-23 | CHH6034 | FOC → ZUH | May 23, 13:35 UTC | May 23, 13:55 UTC | 20m |
| 2026-05-23 | CHH6033 | ZUH → FOC | May 23, 10:15 UTC | May 23, 10:25 UTC | 10m |
| 2026-05-22 | CHH6034 | FOC → ZUH | May 22, 14:25 UTC | May 22, 14:45 UTC | 20m |
| 2026-05-22 | CHH6033 | ZUH → FOC | May 22, 11:15 UTC | May 22, 11:35 UTC | 20m |
| 2026-05-21 | CHH6034 | FOC → ZUH | May 21, 15:40 UTC | May 21, 16:05 UTC | 25m |
| 2026-05-21 | CHH6033 | ZUH → FOC | May 21, 10:20 UTC | May 21, 10:35 UTC | 15m |
| 2026-05-19 | CHH6034 | FOC → ZUH | May 19, 13:35 UTC | May 19, 13:55 UTC | 20m |
| 2026-05-19 | CHH6033 | ZUH → FOC | May 19, 10:30 UTC | May 19, 10:40 UTC | 10m |
| 2026-05-17 | CHH6034 | FOC → ZUH | May 17, 13:25 UTC | May 17, 13:40 UTC | 15m |
| 2026-05-16 | CHH6034 | FOC → ZUH | May 16, 13:21 UTC | May 16, 13:41 UTC | 20m |
| 2026-05-16 | CHH6033 | ZUH → FOC | May 16, 10:16 UTC | May 16, 10:25 UTC | 10m |
| 2026-05-15 | CHH6034 | FOC → ZUH | May 15, 15:35 UTC | May 15, 15:55 UTC | 20m |
| 2026-05-15 | CHH6033 | ZUH → FOC | May 15, 10:20 UTC | May 15, 10:30 UTC | 10m |
| 2026-05-14 | CHH7383 | SYX → HGH | May 14, 11:10 UTC | May 14, 16:00 UTC | 4h 50m |
| 2026-05-13 | CHH6034 | FOC → ZUH | May 13, 14:15 UTC | May 13, 14:35 UTC | 20m |
| 2026-05-13 | CHH6033 | ZUH → FOC | May 13, 10:10 UTC | May 13, 10:20 UTC | 10m |
| 2026-05-12 | CHH7384 | HGH → SYX | May 12, 09:45 UTC | May 12, 14:35 UTC | 4h 50m |
| 2026-05-07 | CHH7333 | SYX → TNA | May 7, 10:05 UTC | May 7, 15:55 UTC | 5h 50m |
| 2026-05-06 | CHH7334 | TNA → SYX | May 6, 14:55 UTC | May 7, 10:20 UTC | 19h 25m |
| 2026-05-06 | CHH7334 | TNA → SYX | May 6, 09:00 UTC | May 6, 15:10 UTC | 6h 9m |
| 2026-05-05 | CHH7334 | TNA → SYX | May 5, 14:50 UTC | May 6, 09:10 UTC | 18h 20m |
| 2026-05-05 | CHH7334 | TNA → SYX | May 5, 09:00 UTC | May 5, 15:10 UTC | 6h 10m |
| 2026-05-04 | CHH7334 | TNA → SYX | May 4, 15:10 UTC | May 5, 09:10 UTC | 18h 1m |
| 2026-05-04 | CHH7334 | TNA → SYX | May 4, 08:50 UTC | May 4, 15:25 UTC | 6h 35m |
| 2026-05-03 | CHH7334 | TNA → SYX | May 3, 15:05 UTC | May 4, 09:00 UTC | 17h 55m |
| 2026-05-03 | CHH7334 | TNA → SYX | May 3, 09:20 UTC | May 3, 15:25 UTC | 6h 5m |
| 2026-05-02 | CHH7334 | TNA → SYX | May 2, 14:45 UTC | May 3, 09:20 UTC | 18h 34m |
| 2026-05-02 | CHH7334 | TNA → SYX | May 2, 13:45 UTC | May 3, 09:20 UTC | 19h 34m |
| 2026-05-02 | CHH7334 | TNA → SYX | May 2, 08:45 UTC | May 2, 15:05 UTC | 6h 20m |
| 2026-05-01 | CHH7750 | SZX → SYX | May 1, 15:25 UTC | May 1, 15:35 UTC | 10m |
| 2026-05-01 | CHH7744 | SZX → LIY | May 1, 12:25 UTC | May 1, 12:35 UTC | 10m |
| 2026-04-28 | CHH7744 | SZX → LIY | Apr 28, 13:35 UTC | Apr 28, 13:50 UTC | 15m |
| 2026-04-27 | CHH7743 | NGB → CGQ | Apr 27, 23:05 UTC | Apr 27, 23:15 UTC | 10m |
| 2026-04-27 | CHH7749 | SYX → SZX | Apr 27, 16:15 UTC | Apr 27, 16:35 UTC | 20m |
| 2026-04-27 | CHH7312 | KHN → SYX | Apr 27, 02:20 UTC | Apr 27, 12:25 UTC | 10h 5m |
| 2026-04-26 | CHH7312 | KHN → SYX | Apr 26, 15:00 UTC | Apr 27, 12:25 UTC | 21h 25m |
| 2026-04-26 | CHH7333 | SYX → TNA | Apr 26, 08:55 UTC | Apr 27, 02:25 UTC | 17h 30m |
| 2026-04-25 | CHH7333 | SYX → TNA | Apr 25, 14:45 UTC | Apr 26, 09:05 UTC | 18h 20m |
| 2026-04-25 | CHH7334 | TNA → SYX | Apr 25, 09:00 UTC | Apr 25, 15:00 UTC | 6h 0m |
| 2026-04-24 | CHH7334 | TNA → SYX | Apr 24, 16:35 UTC | Apr 25, 15:00 UTC | 22h 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-225J page for operator, model, and routing details .