sensors Mode-S transponder
781ED3
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-222Z · BOEING 777-200LR
- Hex
- 781ED3
- Octal
- 36017323
- Decimal
- 7,872,211
- Country
- CN
- Tail
- B-222Z
- Type
- B77L
- Flights observed
- 208
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 14h ago
Current position
Country allocation
The ICAO 24-bit address 781ED3 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 |
|---|---|---|---|
| CKK227 | - | 17 | 2026-07-13 |
| CKK215 | - | 16 | 2026-07-01 |
| CKK221 | - | 15 | 2026-07-16 |
| CKK624 | China Cargo Airlines | 11 | 2026-06-08 |
| CKK228 | - | 11 | 2026-07-13 |
| CKK225 | China Cargo Airlines | 11 | 2026-06-28 |
| CKK231 | - | 10 | 2026-06-22 |
| CKK216 | - | 10 | 2026-07-02 |
| CKK232 | - | 9 | 2026-06-23 |
| CKK222 | - | 9 | 2026-07-17 |
| CKK273 | - | 7 | 2026-07-12 |
| CKK224 | - | 7 | 2026-07-10 |
| CKK623 | China Cargo Airlines | 6 | 2026-06-07 |
| CKK261 | - | 6 | 2026-06-27 |
| CKK226 | - | 6 | 2026-06-28 |
| CKK223 | - | 6 | 2026-07-09 |
| CKK287 | - | 4 | 2026-07-15 |
| CKK274 | - | 4 | 2026-07-12 |
| CKK241 | - | 4 | 2026-07-07 |
| CKK209 | China Cargo Airlines | 4 | 2026-06-04 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-17 | CKK222 | - | Jul 17, 00:20 UTC | Jul 17, 12:00 UTC | 11h 40m |
| 2026-07-16 | CKK221 | - | Jul 16, 10:29 UTC | Jul 16, 21:45 UTC | 11h 15m |
| 2026-07-15 | CKK221 | - | Jul 15, 15:55 UTC | Jul 16, 12:20 UTC | 20h 25m |
| 2026-07-15 | CKK288 | - | Jul 15, 09:50 UTC | Jul 15, 10:20 UTC | 30m |
| 2026-07-15 | CKK287 | - | Jul 15, 04:55 UTC | Jul 15, 08:10 UTC | 3h 15m |
| 2026-07-14 | CKK287 | - | Jul 14, 11:05 UTC | Jul 15, 08:10 UTC | 21h 4m |
| 2026-07-14 | CKK287 | - | Jul 14, 10:30 UTC | Jul 15, 08:10 UTC | 21h 39m |
| 2026-07-13 | CKK228 | - | Jul 13, 22:10 UTC | Jul 14, 11:10 UTC | 13h 0m |
| 2026-07-13 | CKK227 | - | Jul 13, 13:40 UTC | Jul 13, 19:10 UTC | 5h 30m |
| 2026-07-12 | CKK227 | - | Jul 12, 16:50 UTC | Jul 13, 12:05 UTC | 19h 15m |
| 2026-07-12 | CKK274 | - | Jul 12, 15:20 UTC | Jul 12, 15:30 UTC | 10m |
| 2026-07-12 | CKK273 | - | Jul 12, 12:15 UTC | Jul 12, 12:40 UTC | 25m |
| 2026-07-12 | CKK273 | - | Jul 12, 11:05 UTC | Jul 12, 11:25 UTC | 20m |
| 2026-07-10 | CKK224 | - | Jul 10, 11:05 UTC | Jul 10, 22:55 UTC | 11h 50m |
| 2026-07-09 | CKK223 | - | Jul 9, 20:25 UTC | Jul 10, 07:30 UTC | 11h 5m |
| 2026-07-08 | CKK264 | - | Jul 8, 23:25 UTC | Jul 8, 23:45 UTC | 20m |
| 2026-07-08 | CKK263 | - | Jul 8, 19:05 UTC | Jul 8, 20:50 UTC | 1h 45m |
| 2026-07-08 | CKK242 | - | Jul 8, 01:15 UTC | Jul 8, 20:50 UTC | 19h 35m |
| 2026-07-07 | CKK241 | - | Jul 7, 21:10 UTC | Jul 7, 23:00 UTC | 1h 50m |
| 2026-07-06 | CKK236 | - | Jul 6, 12:25 UTC | Jul 6, 18:25 UTC | 6h 0m |
| 2026-07-05 | CKK235 | - | Jul 5, 14:00 UTC | Jul 6, 08:00 UTC | 18h 0m |
| 2026-07-05 | CKK602 | - | Jul 5, 08:50 UTC | Jul 6, 08:00 UTC | 23h 10m |
| 2026-07-05 | CKK602 | - | Jul 5, 08:20 UTC | Jul 5, 14:20 UTC | 6h 0m |
| 2026-07-05 | CKK601 | - | Jul 5, 04:30 UTC | Jul 5, 04:40 UTC | 10m |
| 2026-07-03 | CKK622 | - | Jul 3, 18:55 UTC | Jul 3, 19:30 UTC | 35m |
| 2026-07-03 | CKK621 | ANC → YYZ | Jul 3, 07:05 UTC | Jul 3, 12:40 UTC | 5h 35m |
| 2026-07-02 | CKK621 | - | Jul 2, 22:25 UTC | Jul 3, 05:40 UTC | 7h 15m |
| 2026-07-02 | CKK621 | - | Jul 2, 00:50 UTC | Jul 3, 00:00 UTC | 23h 10m |
| 2026-07-02 | CKK216 | - | Jul 2, 00:40 UTC | Jul 2, 22:45 UTC | 22h 5m |
| 2026-07-01 | CKK216 | - | Jul 1, 19:35 UTC | Jul 2, 01:25 UTC | 5h 50m |
| 2026-07-01 | CKK215 | - | Jul 1, 10:00 UTC | Jul 1, 16:45 UTC | 6h 45m |
| 2026-06-30 | CKK215 | - | Jun 30, 17:30 UTC | Jul 1, 16:45 UTC | 23h 15m |
| 2026-06-30 | CKK215 | - | Jun 30, 15:10 UTC | Jul 1, 14:45 UTC | 23h 35m |
| 2026-06-30 | CKK218 | - | Jun 30, 12:50 UTC | Jul 1, 12:45 UTC | 23h 55m |
| 2026-06-30 | CKK218 | - | Jun 30, 12:20 UTC | Jul 1, 10:45 UTC | 22h 25m |
| 2026-06-30 | CKK217 | - | Jun 30, 02:30 UTC | Jun 30, 09:10 UTC | 6h 40m |
| 2026-06-29 | CKK217 | - | Jun 29, 05:09 UTC | Jun 30, 03:10 UTC | 22h 1m |
| 2026-06-28 | CKK226 | - | Jun 28, 17:30 UTC | Jun 29, 05:50 UTC | 12h 20m |
| 2026-06-28 | CKK225 | PVG → LAX | Jun 28, 09:10 UTC | Jun 28, 14:39 UTC | 5h 30m |
| 2026-06-27 | CKK225 | PVG → LAX | Jun 27, 18:29 UTC | Jun 28, 07:50 UTC | 13h 20m |
| 2026-06-27 | CKK261 | - | Jun 27, 16:20 UTC | Jun 27, 16:49 UTC | 30m |
| 2026-06-26 | CKK228 | - | Jun 26, 21:30 UTC | Jun 27, 10:29 UTC | 13h 0m |
| 2026-06-26 | CKK227 | PVG → ANC | Jun 26, 12:59 UTC | Jun 26, 18:39 UTC | 5h 40m |
| 2026-06-25 | CKK227 | PVG → ANC | Jun 25, 17:39 UTC | Jun 26, 11:20 UTC | 17h 40m |
| 2026-06-25 | CKK227 | PVG → ANC | Jun 25, 12:50 UTC | Jun 26, 11:20 UTC | 22h 30m |
| 2026-06-25 | CKK606 | - | Jun 25, 11:59 UTC | Jun 26, 10:44 UTC | 22h 45m |
| 2026-06-25 | CKK605 | - | Jun 25, 01:50 UTC | Jun 25, 08:30 UTC | 6h 40m |
| 2026-06-24 | CKK605 | - | Jun 24, 06:50 UTC | Jun 25, 06:44 UTC | 23h 55m |
| 2026-06-24 | CKK274 | - | Jun 24, 05:34 UTC | Jun 25, 04:45 UTC | 23h 10m |
| 2026-06-23 | CKK273 | - | Jun 23, 10:35 UTC | Jun 24, 02:00 UTC | 15h 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-222Z page for operator, model, and routing details .