sensors Mode-S transponder
781F03
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-223G · BOEING 777-200LR
- Hex
- 781F03
- Octal
- 36017403
- Decimal
- 7,872,259
- Country
- CN
- Tail
- B-223G
- Type
- B77L
- Flights observed
- 243
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address 781F03 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 |
|---|---|---|---|
| CSG2525 | - | 17 | 2026-05-10 |
| CSG2537 | - | 16 | 2026-07-13 |
| CSG2526 | - | 12 | 2026-05-11 |
| CSG2538 | - | 10 | 2026-07-07 |
| CSG2682 | - | 8 | 2026-05-30 |
| CSG2599 | - | 8 | 2026-05-30 |
| CSG2598 | - | 8 | 2026-06-12 |
| CSG2536 | - | 8 | 2026-06-27 |
| CSG2522 | - | 7 | 2026-06-07 |
| CSG2686 | - | 6 | 2026-05-24 |
| CSG2547 | - | 6 | 2026-05-28 |
| CSG2540 | - | 6 | 2026-06-25 |
| CSG2535 | - | 6 | 2026-06-26 |
| CSG2532 | - | 6 | 2026-07-11 |
| CSG2510 | - | 6 | 2026-07-13 |
| CSG2501 | - | 6 | 2026-06-15 |
| CSG2691 | - | 5 | 2026-06-28 |
| CSG2521 | - | 5 | 2026-06-06 |
| CSG2517 | - | 5 | 2026-04-28 |
| CSG2513 | - | 5 | 2026-06-12 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | CSG2510 | - | Jul 13, 12:20 UTC | Jul 13, 23:55 UTC | 11h 35m |
| 2026-07-13 | CSG2537 | - | Jul 13, 00:20 UTC | Jul 13, 05:15 UTC | 4h 55m |
| 2026-07-12 | CSG2537 | - | Jul 12, 15:35 UTC | Jul 12, 23:05 UTC | 7h 30m |
| 2026-07-11 | CSG2532 | - | Jul 11, 18:50 UTC | Jul 12, 15:45 UTC | 20h 55m |
| 2026-07-11 | CSG2532 | - | Jul 11, 16:50 UTC | Jul 12, 15:45 UTC | 22h 55m |
| 2026-07-11 | CSG2532 | - | Jul 11, 16:15 UTC | Jul 11, 22:40 UTC | 6h 25m |
| 2026-07-11 | CSG2531 | - | Jul 11, 06:55 UTC | Jul 11, 13:25 UTC | 6h 30m |
| 2026-07-10 | CSG2546 | - | Jul 10, 19:10 UTC | Jul 10, 19:25 UTC | 15m |
| 2026-07-10 | CSG2546 | - | Jul 10, 04:20 UTC | Jul 10, 17:15 UTC | 12h 55m |
| 2026-07-09 | CSG2545 | ANC → JFK | Jul 9, 18:20 UTC | Jul 10, 00:50 UTC | 6h 30m |
| 2026-07-08 | CSG2545 | - | Jul 8, 20:40 UTC | Jul 9, 14:25 UTC | 17h 45m |
| 2026-07-08 | CSG2696 | - | Jul 8, 16:50 UTC | Jul 9, 14:25 UTC | 21h 35m |
| 2026-07-08 | CSG2696 | - | Jul 8, 15:15 UTC | Jul 9, 14:25 UTC | 23h 10m |
| 2026-07-07 | CSG2695 | - | Jul 7, 16:50 UTC | Jul 8, 11:40 UTC | 18h 50m |
| 2026-07-07 | CSG2538 | - | Jul 7, 08:50 UTC | Jul 8, 05:40 UTC | 20h 50m |
| 2026-07-07 | CSG2538 | - | Jul 7, 06:50 UTC | Jul 8, 05:40 UTC | 22h 50m |
| 2026-07-07 | CSG2538 | - | Jul 7, 05:05 UTC | Jul 7, 17:15 UTC | 12h 10m |
| 2026-07-06 | CSG2537 | - | Jul 6, 21:15 UTC | Jul 7, 02:00 UTC | 4h 45m |
| 2026-07-06 | CSG2537 | - | Jul 6, 12:25 UTC | Jul 6, 20:05 UTC | 7h 40m |
| 2026-07-05 | CSG2537 | - | Jul 5, 23:00 UTC | Jul 6, 20:05 UTC | 21h 5m |
| 2026-07-05 | CSG2546 | - | Jul 5, 09:55 UTC | Jul 5, 23:15 UTC | 13h 20m |
| 2026-07-05 | CSG2545 | ANC → JFK | Jul 5, 00:40 UTC | Jul 5, 07:00 UTC | 6h 20m |
| 2026-07-04 | CSG2545 | - | Jul 4, 06:30 UTC | Jul 4, 23:20 UTC | 16h 50m |
| 2026-07-03 | CSG2538 | - | Jul 3, 20:50 UTC | Jul 4, 17:30 UTC | 20h 40m |
| 2026-07-03 | CSG2538 | - | Jul 3, 20:40 UTC | Jul 4, 17:30 UTC | 20h 50m |
| 2026-07-03 | CSG2537 | - | Jul 3, 13:00 UTC | Jul 3, 17:30 UTC | 4h 30m |
| 2026-07-03 | CSG2537 | - | Jul 3, 04:40 UTC | Jul 3, 11:40 UTC | 7h 0m |
| 2026-07-02 | CSG2537 | - | Jul 2, 15:15 UTC | Jul 3, 11:40 UTC | 20h 25m |
| 2026-07-02 | CSG2537 | - | Jul 2, 10:50 UTC | Jul 3, 10:45 UTC | 23h 55m |
| 2026-07-02 | CSG2698 | - | Jul 2, 10:00 UTC | Jul 3, 06:05 UTC | 20h 5m |
| 2026-07-01 | CSG2697 | - | Jul 1, 23:10 UTC | Jul 2, 05:45 UTC | 6h 35m |
| 2026-06-29 | CSG2694 | - | Jun 29, 17:10 UTC | Jun 29, 23:05 UTC | 5h 55m |
| 2026-06-29 | CSG2693 | - | Jun 29, 06:34 UTC | Jun 29, 13:00 UTC | 6h 25m |
| 2026-06-28 | CSG2693 | - | Jun 28, 15:49 UTC | Jun 29, 13:00 UTC | 21h 10m |
| 2026-06-28 | CSG2692 | - | Jun 28, 10:24 UTC | Jun 29, 06:44 UTC | 20h 20m |
| 2026-06-28 | CSG2691 | - | Jun 28, 00:09 UTC | Jun 28, 06:30 UTC | 6h 20m |
| 2026-06-27 | CSG2691 | - | Jun 27, 08:49 UTC | Jun 28, 06:30 UTC | 21h 40m |
| 2026-06-27 | CSG2691 | - | Jun 27, 08:29 UTC | Jun 28, 06:30 UTC | 22h 0m |
| 2026-06-27 | CSG2536 | - | Jun 27, 00:50 UTC | Jun 28, 00:30 UTC | 23h 40m |
| 2026-06-26 | CSG2536 | - | Jun 26, 21:10 UTC | Jun 27, 08:49 UTC | 11h 40m |
| 2026-06-26 | CSG2535 | - | Jun 26, 13:10 UTC | Jun 26, 17:25 UTC | 4h 15m |
| 2026-06-25 | CSG2535 | - | Jun 25, 20:19 UTC | Jun 26, 12:05 UTC | 15h 45m |
| 2026-06-25 | CSG2540 | - | Jun 25, 12:50 UTC | Jun 26, 12:05 UTC | 23h 15m |
| 2026-06-25 | CSG2540 | - | Jun 25, 12:25 UTC | Jun 26, 10:44 UTC | 22h 20m |
| 2026-06-25 | CSG2540 | - | Jun 25, 08:50 UTC | Jun 26, 04:50 UTC | 20h 0m |
| 2026-06-25 | CSG2540 | - | Jun 25, 08:30 UTC | Jun 26, 04:50 UTC | 20h 20m |
| 2026-06-24 | CSG2653 | - | Jun 24, 11:50 UTC | Jun 25, 05:29 UTC | 17h 40m |
| 2026-06-24 | CSG2653 | - | Jun 24, 05:40 UTC | Jun 25, 04:45 UTC | 23h 5m |
| 2026-06-24 | CSG2674 | - | Jun 24, 00:49 UTC | Jun 24, 21:00 UTC | 20h 10m |
| 2026-06-23 | CSG2674 | - | Jun 23, 23:39 UTC | Jun 24, 21:00 UTC | 21h 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-223G page for operator, model, and routing details .