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
- 129
- Distinct callsigns
- 17
- Country
- CN
- Last broadcast
- 1h 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 17 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CHH7048 | - | 52 | 2026-07-12 |
| CHH7047 | - | 26 | 2026-06-30 |
| CHH7061 | - | 19 | 2026-07-13 |
| CHH7076 | - | 4 | 2026-07-16 |
| CHH7022 | - | 4 | 2026-07-15 |
| CHH7062 | - | 3 | 2026-07-14 |
| CHH7021 | - | 3 | 2026-07-14 |
| CHH7116 | - | 2 | 2026-06-26 |
| CHH7055 | Hainan Airlines | 2 | 2026-05-29 |
| CHH7045 | Hainan Airlines | 2 | 2026-06-05 |
| CHH7042 | - | 2 | 2026-07-10 |
| CHH7744 | - | 1 | 2026-07-17 |
| CHH7311 | - | 1 | 2026-07-18 |
| CHH7215 | Hainan Airlines | 1 | 2026-05-27 |
| CHH7115 | - | 1 | 2026-07-03 |
| CHH7075 | Hainan Airlines | 1 | 2026-05-26 |
| CHH7064 | - | 1 | 2026-07-05 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-18 | CHH7311 | - | Jul 18, 01:30 UTC | Jul 18, 01:45 UTC | 15m |
| 2026-07-17 | CHH7744 | - | Jul 17, 04:35 UTC | Jul 17, 12:55 UTC | 8h 20m |
| 2026-07-16 | CHH7076 | - | Jul 16, 00:25 UTC | Jul 16, 04:50 UTC | 4h 25m |
| 2026-07-15 | CHH7022 | - | Jul 15, 01:15 UTC | Jul 15, 01:30 UTC | 15m |
| 2026-07-14 | CHH7021 | - | Jul 14, 23:00 UTC | Jul 14, 23:15 UTC | 15m |
| 2026-07-14 | CHH7062 | - | Jul 14, 05:50 UTC | Jul 14, 10:30 UTC | 4h 40m |
| 2026-07-13 | CHH7062 | - | Jul 13, 14:25 UTC | Jul 14, 10:30 UTC | 20h 5m |
| 2026-07-13 | CHH7062 | - | Jul 13, 10:05 UTC | Jul 14, 06:05 UTC | 20h 0m |
| 2026-07-13 | CHH7061 | - | Jul 13, 06:15 UTC | Jul 14, 06:00 UTC | 23h 45m |
| 2026-07-12 | CHH7048 | - | Jul 12, 12:15 UTC | Jul 13, 10:20 UTC | 22h 5m |
| 2026-07-12 | CHH7048 | - | Jul 12, 12:01 UTC | Jul 13, 10:00 UTC | 22h 0m |
| 2026-07-10 | CHH7042 | - | Jul 10, 07:30 UTC | Jul 10, 13:55 UTC | 6h 25m |
| 2026-07-09 | CHH7061 | - | Jul 9, 06:20 UTC | Jul 9, 06:35 UTC | 15m |
| 2026-07-08 | CHH7061 | - | Jul 8, 06:10 UTC | Jul 8, 06:25 UTC | 15m |
| 2026-07-06 | CHH7048 | - | Jul 6, 12:55 UTC | Jul 7, 06:20 UTC | 17h 25m |
| 2026-07-05 | CHH7064 | - | Jul 5, 17:10 UTC | Jul 6, 08:25 UTC | 15h 15m |
| 2026-07-03 | CHH7115 | - | Jul 3, 01:40 UTC | Jul 3, 07:00 UTC | 5h 20m |
| 2026-07-01 | CHH7061 | - | Jul 1, 06:15 UTC | Jul 1, 06:30 UTC | 15m |
| 2026-06-30 | CHH7048 | - | Jun 30, 12:25 UTC | Jun 30, 12:45 UTC | 20m |
| 2026-06-30 | CHH7047 | - | Jun 30, 00:04 UTC | Jun 30, 08:15 UTC | 8h 11m |
| 2026-06-28 | CHH7048 | - | Jun 28, 23:29 UTC | Jun 29, 16:19 UTC | 16h 50m |
| 2026-06-28 | CHH7048 | - | Jun 28, 12:29 UTC | Jun 29, 11:35 UTC | 23h 5m |
| 2026-06-27 | CHH7048 | - | Jun 27, 14:09 UTC | Jun 28, 07:50 UTC | 17h 40m |
| 2026-06-27 | CHH7048 | - | Jun 27, 09:19 UTC | Jun 28, 07:50 UTC | 22h 30m |
| 2026-06-27 | CHH7048 | - | Jun 27, 03:15 UTC | Jun 28, 00:25 UTC | 21h 10m |
| 2026-06-27 | CHH7048 | - | Jun 27, 00:05 UTC | Jun 27, 14:29 UTC | 14h 25m |
| 2026-06-26 | CHH7047 | - | Jun 26, 16:00 UTC | Jun 27, 10:00 UTC | 18h 0m |
| 2026-06-26 | CHH7116 | - | Jun 26, 07:14 UTC | Jun 27, 03:15 UTC | 20h 0m |
| 2026-06-26 | CHH7116 | - | Jun 26, 01:50 UTC | Jun 26, 16:00 UTC | 14h 10m |
| 2026-06-25 | CHH7048 | - | Jun 25, 12:35 UTC | Jun 25, 12:54 UTC | 20m |
| 2026-06-25 | - | - | Jun 25, 09:59 UTC | Jun 25, 10:25 UTC | 25m |
| 2026-06-25 | CHH7047 | - | Jun 25, 00:19 UTC | Jun 25, 08:50 UTC | 8h 30m |
| 2026-06-24 | CHH7048 | - | Jun 24, 12:34 UTC | Jun 25, 08:50 UTC | 20h 15m |
| 2026-06-24 | CHH7048 | - | Jun 24, 09:39 UTC | Jun 24, 09:59 UTC | 20m |
| 2026-06-23 | CHH7048 | - | Jun 23, 07:29 UTC | Jun 24, 00:25 UTC | 16h 55m |
| 2026-06-23 | CHH7047 | - | Jun 23, 00:19 UTC | Jun 23, 00:39 UTC | 20m |
| 2026-06-22 | CHH7048 | - | Jun 22, 12:34 UTC | Jun 22, 12:54 UTC | 20m |
| 2026-06-22 | CHH7047 | - | Jun 22, 02:54 UTC | Jun 22, 03:14 UTC | 20m |
| 2026-06-21 | CHH7047 | - | Jun 21, 16:10 UTC | Jun 21, 23:59 UTC | 7h 50m |
| 2026-06-20 | CHH7048 | - | Jun 20, 08:09 UTC | Jun 20, 12:50 UTC | 4h 40m |
| 2026-06-19 | CHH7048 | - | Jun 19, 12:25 UTC | Jun 20, 00:19 UTC | 11h 55m |
| 2026-06-18 | CHH7048 | - | Jun 18, 12:55 UTC | Jun 19, 00:24 UTC | 11h 29m |
| 2026-06-18 | CHH7048 | - | Jun 18, 09:30 UTC | Jun 18, 10:00 UTC | 30m |
| 2026-06-18 | CHH7047 | - | Jun 18, 00:25 UTC | Jun 18, 08:20 UTC | 7h 55m |
| 2026-06-17 | CHH7048 | - | Jun 17, 13:15 UTC | Jun 18, 08:20 UTC | 19h 5m |
| 2026-06-17 | CHH7047 | - | Jun 17, 01:05 UTC | Jun 17, 09:05 UTC | 8h 0m |
| 2026-06-16 | CHH7048 | - | Jun 16, 12:39 UTC | Jun 17, 09:05 UTC | 20h 26m |
| 2026-06-16 | CHH7048 | - | Jun 16, 08:05 UTC | Jun 17, 01:25 UTC | 17h 21m |
| 2026-06-16 | CHH7048 | - | Jun 16, 00:00 UTC | Jun 16, 13:00 UTC | 13h 0m |
| 2026-06-15 | CHH7048 | - | Jun 15, 14:30 UTC | Jun 16, 13:00 UTC | 22h 30m |
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 .