sensors Mode-S transponder
7820F8
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-225S · BOEING 737 MAX 8
- Hex
- 7820F8
- Octal
- 36020370
- Decimal
- 7,872,760
- Country
- CN
- Tail
- B-225S
- Type
- B38M
- Flights observed
- 59
- Distinct callsigns
- 11
- Country
- CN
- Last broadcast
- 10h ago
Last known position
Country allocation
The ICAO 24-bit address 7820F8 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 11 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CHH7048 | - | 20 | 2026-06-02 |
| CHH7061 | Hainan Airlines | 13 | 2026-05-30 |
| CHH7047 | - | 12 | 2026-06-02 |
| CHH7022 | Hainan Airlines | 3 | 2026-05-06 |
| CHH7055 | Hainan Airlines | 2 | 2026-05-29 |
| CHH7021 | Hainan Airlines | 2 | 2026-05-05 |
| CHH7215 | Hainan Airlines | 1 | 2026-05-27 |
| CHH7076 | Hainan Airlines | 1 | 2026-05-26 |
| CHH7075 | Hainan Airlines | 1 | 2026-05-26 |
| CHH7045 | Hainan Airlines | 1 | 2026-05-28 |
| CHH7042 | Hainan Airlines | 1 | 2026-05-17 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-02 | CHH7048 | - | Jun 2, 12:45 UTC | Jun 2, 13:05 UTC | 20m |
| 2026-06-02 | CHH7047 | - | Jun 2, 00:20 UTC | Jun 2, 08:20 UTC | 8h 0m |
| 2026-06-01 | CHH7048 | - | Jun 1, 07:35 UTC | Jun 1, 12:40 UTC | 5h 5m |
| 2026-05-31 | CHH7047 | - | May 31, 23:35 UTC | Jun 1, 00:00 UTC | 25m |
| 2026-05-30 | CHH7061 | HAK → HGH | May 30, 06:15 UTC | May 30, 14:45 UTC | 8h 30m |
| 2026-05-29 | CHH7061 | HAK → HGH | May 29, 13:55 UTC | May 30, 06:35 UTC | 16h 40m |
| 2026-05-29 | CHH7055 | HAK → HGH | May 29, 08:55 UTC | May 30, 06:35 UTC | 21h 40m |
| 2026-05-29 | CHH7055 | HAK → HGH | May 29, 00:55 UTC | May 29, 13:55 UTC | 13h 0m |
| 2026-05-28 | CHH7045 | ZUH → TYN | May 28, 05:40 UTC | May 28, 05:50 UTC | 10m |
| 2026-05-27 | CHH7215 | HAK → NKG | May 27, 04:30 UTC | May 27, 09:45 UTC | 5h 16m |
| 2026-05-26 | CHH7076 | FOC → HAK | May 26, 04:24 UTC | May 26, 04:45 UTC | 20m |
| 2026-05-26 | CHH7075 | HAK → KHN | May 26, 00:49 UTC | May 26, 01:10 UTC | 20m |
| 2026-05-20 | CHH7061 | HAK → HGH | May 20, 06:05 UTC | May 20, 06:20 UTC | 15m |
| 2026-05-19 | CHH7061 | HAK → HGH | May 19, 06:10 UTC | May 19, 06:25 UTC | 15m |
| 2026-05-17 | CHH7042 | HGH → HAK | May 17, 09:30 UTC | May 17, 16:40 UTC | 7h 10m |
| 2026-05-14 | CHH7048 | - | May 14, 08:05 UTC | May 14, 12:50 UTC | 4h 45m |
| 2026-05-14 | CHH7047 | - | May 14, 00:05 UTC | May 14, 00:15 UTC | 10m |
| 2026-05-12 | CHH7048 | - | May 12, 12:25 UTC | May 12, 12:45 UTC | 20m |
| 2026-05-10 | CHH7048 | - | May 10, 23:29 UTC | May 11, 12:50 UTC | 13h 20m |
| 2026-05-09 | CHH7061 | HAK → HGH | May 9, 06:25 UTC | May 9, 06:40 UTC | 15m |
| 2026-05-08 | CHH7061 | HAK → HGH | May 8, 06:09 UTC | May 8, 06:25 UTC | 15m |
| 2026-05-07 | CHH7061 | HAK → HGH | May 7, 06:15 UTC | May 7, 06:25 UTC | 10m |
| 2026-05-06 | CHH7022 | CAN → SYX | May 6, 01:10 UTC | May 6, 01:25 UTC | 15m |
| 2026-05-05 | CHH7021 | HAK → SZX | May 5, 23:10 UTC | May 5, 23:30 UTC | 20m |
| 2026-05-05 | CHH7061 | HAK → HGH | May 5, 06:15 UTC | May 5, 06:30 UTC | 15m |
| 2026-05-04 | CHH7061 | HAK → HGH | May 4, 06:15 UTC | May 4, 06:35 UTC | 20m |
| 2026-05-03 | CHH7061 | HAK → HGH | May 3, 06:05 UTC | May 3, 06:20 UTC | 15m |
| 2026-05-02 | CHH7061 | HAK → HGH | May 2, 06:15 UTC | May 2, 06:30 UTC | 15m |
| 2026-05-01 | CHH7022 | CAN → SYX | May 1, 01:15 UTC | May 1, 01:35 UTC | 20m |
| 2026-04-30 | CHH7021 | HAK → SZX | Apr 30, 23:15 UTC | Apr 30, 23:30 UTC | 15m |
| 2026-04-30 | CHH7061 | HAK → HGH | Apr 30, 06:30 UTC | Apr 30, 06:45 UTC | 15m |
| 2026-04-29 | CHH7022 | CAN → SYX | Apr 29, 00:59 UTC | Apr 29, 01:15 UTC | 15m |
| 2026-04-28 | CHH7061 | HAK → HGH | Apr 28, 06:10 UTC | Apr 28, 06:20 UTC | 10m |
| 2026-04-26 | CHH7048 | - | Apr 26, 12:35 UTC | Apr 26, 13:00 UTC | 25m |
| 2026-04-26 | CHH7047 | - | Apr 26, 00:05 UTC | Apr 26, 00:25 UTC | 20m |
| 2026-04-25 | CHH7048 | - | Apr 25, 12:30 UTC | Apr 25, 12:55 UTC | 25m |
| 2026-04-25 | CHH7047 | - | Apr 25, 00:05 UTC | Apr 25, 00:30 UTC | 25m |
| 2026-04-24 | CHH7048 | - | Apr 24, 13:10 UTC | Apr 24, 13:35 UTC | 25m |
| 2026-04-24 | - | - | Apr 24, 08:10 UTC | Apr 24, 08:25 UTC | 15m |
| 2026-04-24 | CHH7047 | - | Apr 24, 00:30 UTC | Apr 24, 00:45 UTC | 15m |
| 2026-04-23 | CHH7048 | - | Apr 23, 02:55 UTC | Apr 23, 12:50 UTC | 9h 55m |
| 2026-04-23 | CHH7047 | - | Apr 23, 00:05 UTC | Apr 23, 00:20 UTC | 15m |
| 2026-04-22 | CHH7048 | - | Apr 22, 04:45 UTC | Apr 22, 14:25 UTC | 9h 40m |
| 2026-04-21 | CHH7048 | - | Apr 21, 08:30 UTC | Apr 22, 00:25 UTC | 15h 55m |
| 2026-04-21 | CHH7048 | - | Apr 21, 00:10 UTC | Apr 21, 12:55 UTC | 12h 45m |
| 2026-04-20 | CHH7048 | - | Apr 20, 12:30 UTC | Apr 20, 12:50 UTC | 20m |
| 2026-04-19 | CHH7047 | - | Apr 19, 23:30 UTC | Apr 20, 08:30 UTC | 9h 0m |
| 2026-04-19 | CHH7048 | - | Apr 19, 12:30 UTC | Apr 20, 08:30 UTC | 20h 0m |
| 2026-04-19 | - | - | Apr 19, 07:50 UTC | Apr 19, 08:25 UTC | 35m |
| 2026-04-18 | CHH7048 | - | Apr 18, 12:45 UTC | Apr 19, 00:35 UTC | 11h 50m |
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-225S page for operator, model, and routing details .