sensors Mode-S transponder
780C99
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-1977 · BOEING 737-800
- Hex
- 780C99
- Octal
- 36006231
- Decimal
- 7,867,545
- Country
- CN
- Tail
- B-1977
- Type
- B738
- Flights observed
- 67
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 14h ago
Last known position
Country allocation
The ICAO 24-bit address 780C99 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 |
|---|---|---|---|
| CCA823 | Air China | 13 | 2026-05-25 |
| CCA824 | Air China | 10 | 2026-06-01 |
| CCA903 | Air China | 5 | 2026-05-08 |
| CCA904 | Air China | 2 | 2026-05-31 |
| CCA130 | Air China | 2 | 2026-05-08 |
| CCA129 | Air China | 2 | 2026-05-08 |
| CCA1277 | Air China | 2 | 2026-05-26 |
| CCA870 | Air China | 1 | 2026-05-11 |
| CCA869 | Air China | 1 | 2026-05-11 |
| CCA8659 | Air China | 1 | 2026-05-18 |
| CCA8608 | Air China | 1 | 2026-05-17 |
| CCA8376 | Air China | 1 | 2026-05-27 |
| CCA764 | Air China | 1 | 2026-05-15 |
| CCA763 | Air China | 1 | 2026-05-15 |
| CCA4148 | Air China | 1 | 2026-04-25 |
| CCA4132 | Air China | 1 | 2026-05-26 |
| CCA1915 | Air China | 1 | 2026-04-22 |
| CCA1841 | Air China | 1 | 2026-05-03 |
| CCA1809 | Air China | 1 | 2026-05-02 |
| CCA1716 | Air China | 1 | 2026-04-27 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-01 | CCA824 | CNX → PEK | Jun 1, 16:00 UTC | Jun 2, 12:50 UTC | 20h 50m |
| 2026-05-31 | CCA904 | SGN → PEK | May 31, 23:30 UTC | Jun 1, 14:05 UTC | 14h 35m |
| 2026-05-31 | CCA904 | SGN → PEK | May 31, 15:40 UTC | Jun 1, 14:05 UTC | 22h 25m |
| 2026-05-27 | CCA8376 | LHW → PKX | May 27, 02:14 UTC | May 27, 02:24 UTC | 10m |
| 2026-05-26 | CCA1277 | PEK → LHW | May 26, 12:10 UTC | May 26, 12:40 UTC | 30m |
| 2026-05-26 | CCA4132 | PEK → CKG | May 26, 04:10 UTC | May 26, 04:30 UTC | 20m |
| 2026-05-25 | CCA824 | CNX → PEK | May 25, 16:05 UTC | May 25, 16:25 UTC | 20m |
| 2026-05-25 | CCA823 | PEK → CNX | May 25, 09:55 UTC | May 25, 14:10 UTC | 4h 15m |
| 2026-05-22 | CCA1207 | PEK → LHW | May 22, 02:30 UTC | May 22, 03:00 UTC | 30m |
| 2026-05-18 | CCA8659 | PKX → NDG | May 18, 06:50 UTC | May 18, 07:00 UTC | 10m |
| 2026-05-17 | CCA8608 | WUA → PKX | May 17, 08:35 UTC | May 17, 08:50 UTC | 15m |
| 2026-05-15 | CCA764 | HKG → PKX | May 15, 10:40 UTC | May 15, 10:55 UTC | 15m |
| 2026-05-15 | CCA763 | PKX → HKG | May 15, 07:55 UTC | May 15, 08:25 UTC | 30m |
| 2026-05-12 | CCA824 | CNX → PEK | May 12, 16:00 UTC | May 12, 16:15 UTC | 15m |
| 2026-05-12 | CCA823 | PEK → CNX | May 12, 14:15 UTC | May 12, 14:40 UTC | 25m |
| 2026-05-11 | CCA870 | IKT → PEK | May 11, 10:15 UTC | May 11, 10:25 UTC | 10m |
| 2026-05-11 | CCA869 | PEK → IKT | May 11, 07:20 UTC | May 11, 07:50 UTC | 30m |
| 2026-05-09 | CCA1277 | PEK → LHW | May 9, 11:55 UTC | May 9, 12:20 UTC | 25m |
| 2026-05-08 | CCA903 | PEK → SGN | May 8, 12:55 UTC | May 8, 13:05 UTC | 10m |
| 2026-05-08 | CCA130 | PUS → PEK | May 8, 03:55 UTC | May 8, 04:29 UTC | 35m |
| 2026-05-08 | CCA129 | PEK → PUS | May 8, 01:35 UTC | May 8, 02:04 UTC | 30m |
| 2026-05-07 | CCA824 | CNX → PEK | May 7, 16:00 UTC | May 7, 16:20 UTC | 20m |
| 2026-05-07 | CCA823 | PEK → CNX | May 7, 09:50 UTC | May 7, 14:30 UTC | 4h 40m |
| 2026-05-06 | CCA903 | PEK → SGN | May 6, 12:25 UTC | May 6, 12:50 UTC | 25m |
| 2026-05-06 | CCA1300 | SZX → PVG | May 6, 08:15 UTC | May 6, 08:30 UTC | 15m |
| 2026-05-06 | CCA1299 | - | May 6, 05:20 UTC | May 6, 05:40 UTC | 20m |
| 2026-05-05 | CCA1613 | PEK → YNJ | May 5, 22:45 UTC | May 5, 22:55 UTC | 10m |
| 2026-05-05 | CCA824 | CNX → PEK | May 5, 16:00 UTC | May 5, 16:15 UTC | 15m |
| 2026-05-05 | CCA823 | PEK → CNX | May 5, 10:00 UTC | May 5, 14:25 UTC | 4h 25m |
| 2026-05-04 | CCA824 | CNX → PEK | May 4, 16:10 UTC | May 4, 16:30 UTC | 20m |
| 2026-05-04 | CCA823 | PEK → CNX | May 4, 10:15 UTC | May 4, 14:45 UTC | 4h 30m |
| 2026-05-03 | CCA1841 | PEK → YTY | May 3, 22:34 UTC | May 3, 22:45 UTC | 10m |
| 2026-05-03 | CCA1561 | PEK → NKG | May 3, 06:30 UTC | May 3, 06:45 UTC | 15m |
| 2026-05-02 | CCA903 | PEK → SGN | May 2, 12:45 UTC | May 2, 13:10 UTC | 25m |
| 2026-05-02 | CCA1809 | PEK → XMN | May 2, 01:50 UTC | May 2, 02:00 UTC | 10m |
| 2026-05-01 | CCA130 | PUS → PEK | May 1, 04:00 UTC | May 1, 04:35 UTC | 35m |
| 2026-05-01 | CCA129 | PEK → PUS | May 1, 01:30 UTC | May 1, 01:55 UTC | 25m |
| 2026-04-30 | CCA824 | CNX → PEK | Apr 30, 16:00 UTC | Apr 30, 16:15 UTC | 15m |
| 2026-04-30 | CCA823 | PEK → CNX | Apr 30, 09:50 UTC | Apr 30, 14:15 UTC | 4h 25m |
| 2026-04-29 | CCA903 | PEK → SGN | Apr 29, 12:40 UTC | Apr 29, 12:55 UTC | 15m |
| 2026-04-27 | CCA1716 | PEK → HGH | Apr 27, 06:05 UTC | Apr 27, 06:15 UTC | 10m |
| 2026-04-26 | CCA1270 | ENY → PEK | Apr 26, 12:55 UTC | Apr 26, 13:10 UTC | 15m |
| 2026-04-26 | CCA1269 | PEK → ENY | Apr 26, 09:30 UTC | Apr 26, 10:00 UTC | 30m |
| 2026-04-25 | CCA4148 | PEK → CKG | Apr 25, 03:10 UTC | Apr 25, 03:35 UTC | 25m |
| 2026-04-24 | CCA1228 | - | Apr 24, 08:20 UTC | Apr 24, 08:40 UTC | 20m |
| 2026-04-23 | CCA903 | PEK → SGN | Apr 23, 12:45 UTC | Apr 24, 04:40 UTC | 15h 55m |
| 2026-04-22 | CCA1915 | PEK → CGO | Apr 22, 13:45 UTC | Apr 22, 13:55 UTC | 10m |
| 2026-04-22 | CCA1143 | - | Apr 22, 05:55 UTC | Apr 22, 06:05 UTC | 10m |
| 2026-04-22 | CCA1268 | XNN → PEK | Apr 22, 03:35 UTC | Apr 22, 03:55 UTC | 20m |
| 2026-04-21 | CCA1267 | PEK → XNN | Apr 21, 22:45 UTC | Apr 21, 23:15 UTC | 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-1977 page for operator, model, and routing details .