sensors Mode-S transponder
78073A
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-5581 · BOEING 737-800
- Hex
- 78073A
- Octal
- 36003472
- Decimal
- 7,866,170
- Country
- CN
- Tail
- B-5581
- Type
- B738
- Flights observed
- 28
- Distinct callsigns
- 16
- Country
- CN
- Last broadcast
- 6d ago
Last known position
Country allocation
The ICAO 24-bit address 78073A 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 16 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CGN8315 | Chang'an Airlines | 5 | 2026-06-27 |
| CGN8349 | Chang'an Airlines | 4 | 2026-05-09 |
| CGN8418 | - | 3 | 2026-06-25 |
| CGN8495 | - | 2 | 2026-07-14 |
| CGN8455 | - | 2 | 2026-07-18 |
| CGN8397 | Chang'an Airlines | 2 | 2026-06-21 |
| CGN8464 | - | 1 | 2026-05-29 |
| CGN8456 | Chang'an Airlines | 1 | 2026-05-25 |
| CGN8417 | Chang'an Airlines | 1 | 2026-06-23 |
| CGN8413 | - | 1 | 2026-07-02 |
| CGN8399 | Chang'an Airlines | 1 | 2026-04-23 |
| CGN8398 | Chang'an Airlines | 1 | 2026-06-15 |
| CGN8316 | Chang'an Airlines | 1 | 2026-06-18 |
| CGN6023 | Chang'an Airlines | 1 | 2026-04-20 |
| CGN6004 | Chang'an Airlines | 1 | 2026-06-15 |
| CGN6002 | Chang'an Airlines | 1 | 2026-05-30 |
Recent flights last 28
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-18 | CGN8455 | - | Jul 18, 05:50 UTC | Jul 18, 10:05 UTC | 4h 15m |
| 2026-07-14 | CGN8495 | - | Jul 14, 09:10 UTC | Jul 14, 09:25 UTC | 15m |
| 2026-07-04 | CGN8495 | - | Jul 4, 09:30 UTC | Jul 4, 09:50 UTC | 20m |
| 2026-07-02 | CGN8413 | - | Jul 2, 02:45 UTC | Jul 2, 03:05 UTC | 20m |
| 2026-06-27 | CGN8315 | BZX → HAK | Jun 27, 08:44 UTC | Jun 27, 09:04 UTC | 20m |
| 2026-06-25 | CGN8418 | - | Jun 25, 11:50 UTC | Jun 25, 11:59 UTC | 10m |
| 2026-06-23 | CGN8418 | - | Jun 23, 11:54 UTC | Jun 23, 12:09 UTC | 15m |
| 2026-06-23 | CGN8417 | JGS → ZUH | Jun 23, 10:44 UTC | Jun 23, 10:55 UTC | 10m |
| 2026-06-21 | CGN8397 | XIY → ZHA | Jun 21, 11:59 UTC | Jun 21, 12:14 UTC | 15m |
| 2026-06-18 | CGN8316 | BZX → XIY | Jun 18, 09:40 UTC | Jun 18, 12:20 UTC | 2h 40m |
| 2026-06-17 | CGN8315 | BZX → HAK | Jun 17, 11:55 UTC | Jun 18, 09:55 UTC | 22h 0m |
| 2026-06-15 | CGN8398 | ZHA → XIY | Jun 15, 15:00 UTC | Jun 15, 15:15 UTC | 15m |
| 2026-06-15 | CGN6004 | SYX → HJJ | Jun 15, 02:50 UTC | Jun 15, 12:55 UTC | 10h 5m |
| 2026-06-13 | CGN8315 | BZX → HAK | Jun 13, 08:40 UTC | Jun 14, 03:25 UTC | 18h 45m |
| 2026-06-11 | CGN8315 | BZX → HAK | Jun 11, 09:00 UTC | Jun 11, 09:10 UTC | 10m |
| 2026-06-08 | CGN8455 | CSX → HRB | Jun 8, 05:15 UTC | Jun 8, 09:45 UTC | 4h 30m |
| 2026-06-07 | CGN8397 | XIY → ZHA | Jun 7, 12:20 UTC | Jun 7, 12:35 UTC | 15m |
| 2026-06-02 | CGN8315 | BZX → HAK | Jun 2, 08:55 UTC | Jun 2, 09:05 UTC | 10m |
| 2026-05-30 | CGN6002 | SZX → XIY | May 30, 11:20 UTC | May 30, 11:30 UTC | 10m |
| 2026-05-29 | CGN8464 | - | May 29, 11:00 UTC | May 29, 11:35 UTC | 35m |
| 2026-05-25 | CGN8456 | HRB → CSX | May 25, 09:55 UTC | May 25, 10:15 UTC | 20m |
| 2026-05-09 | CGN8349 | XIY → CGQ | May 9, 09:55 UTC | May 9, 10:10 UTC | 15m |
| 2026-05-02 | CGN8418 | ZUH → JGS | May 2, 11:05 UTC | May 2, 11:15 UTC | 10m |
| 2026-04-24 | CGN8349 | XIY → CGQ | Apr 24, 23:40 UTC | Apr 25, 08:50 UTC | 9h 10m |
| 2026-04-24 | CGN8349 | XIY → CGQ | Apr 24, 10:35 UTC | Apr 25, 08:50 UTC | 22h 15m |
| 2026-04-24 | CGN8349 | XIY → CGQ | Apr 24, 10:25 UTC | Apr 25, 00:00 UTC | 13h 35m |
| 2026-04-23 | CGN8399 | XIY → TGO | Apr 23, 00:10 UTC | Apr 23, 00:25 UTC | 15m |
| 2026-04-20 | CGN6023 | XIY → HRB | Apr 20, 09:25 UTC | Apr 20, 09:45 UTC | 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-5581 page for operator, model, and routing details .