sensors Mode-S transponder
780B50
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-5843 · BOEING 737-800
- Hex
- 780B50
- Octal
- 36005520
- Decimal
- 7,867,216
- Country
- CN
- Tail
- B-5843
- Type
- B738
- Flights observed
- 25
- Distinct callsigns
- 9
- Country
- CN
- Last broadcast
- 2d ago
Current position
Country allocation
The ICAO 24-bit address 780B50 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 9 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| OKA2755 | - | 7 | 2026-05-14 |
| OKA2756 | Okay Airways | 6 | 2026-06-04 |
| OKA3022 | Okay Airways | 4 | 2026-05-21 |
| OKA3112 | - | 2 | 2026-05-27 |
| OKA3021 | Okay Airways | 2 | 2026-04-21 |
| OKA3133 | - | 1 | 2026-05-24 |
| OKA3100 | - | 1 | 2026-05-20 |
| OKA3064 | Okay Airways | 1 | 2026-04-22 |
| OKA2953 | Okay Airways | 1 | 2026-05-28 |
Recent flights last 25
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-04 | OKA2756 | TSN → TFU | Jun 4, 08:50 UTC | Jun 4, 14:10 UTC | 5h 20m |
| 2026-06-03 | OKA2756 | TSN → TFU | Jun 3, 08:25 UTC | Jun 3, 14:15 UTC | 5h 50m |
| 2026-06-02 | OKA2756 | TSN → TFU | Jun 2, 02:00 UTC | Jun 2, 14:15 UTC | 12h 15m |
| 2026-05-31 | OKA2756 | TSN → TFU | May 31, 01:10 UTC | May 31, 14:25 UTC | 13h 15m |
| 2026-05-29 | OKA2756 | TSN → TFU | May 29, 01:15 UTC | May 29, 14:20 UTC | 13h 5m |
| 2026-05-28 | OKA2953 | CKG → ACX | May 28, 04:50 UTC | May 28, 05:00 UTC | 10m |
| 2026-05-27 | OKA3112 | - | May 27, 06:49 UTC | May 27, 07:10 UTC | 20m |
| 2026-05-24 | OKA3133 | - | May 24, 08:50 UTC | May 24, 09:00 UTC | 10m |
| 2026-05-21 | OKA3022 | XAI → TSN | May 21, 13:35 UTC | May 21, 13:45 UTC | 10m |
| 2026-05-20 | OKA3100 | - | May 20, 15:05 UTC | May 20, 15:30 UTC | 25m |
| 2026-05-19 | OKA3022 | XAI → TSN | May 19, 08:00 UTC | May 19, 08:10 UTC | 10m |
| 2026-05-14 | OKA2755 | - | May 14, 01:40 UTC | May 14, 14:05 UTC | 12h 25m |
| 2026-05-13 | OKA2755 | - | May 13, 01:15 UTC | May 13, 01:30 UTC | 15m |
| 2026-05-11 | OKA2755 | - | May 11, 01:30 UTC | May 11, 14:05 UTC | 12h 35m |
| 2026-05-09 | OKA2756 | TSN → TFU | May 9, 01:35 UTC | May 9, 14:10 UTC | 12h 35m |
| 2026-05-07 | OKA2755 | - | May 7, 01:20 UTC | May 7, 01:30 UTC | 10m |
| 2026-05-05 | OKA2755 | - | May 5, 01:15 UTC | May 5, 14:05 UTC | 12h 50m |
| 2026-05-03 | OKA2755 | - | May 3, 01:15 UTC | May 3, 14:05 UTC | 12h 49m |
| 2026-04-29 | OKA2755 | - | Apr 29, 01:25 UTC | Apr 29, 01:35 UTC | 10m |
| 2026-04-24 | OKA3112 | - | Apr 24, 07:05 UTC | Apr 24, 07:15 UTC | 10m |
| 2026-04-22 | OKA3064 | SZX → EHU | Apr 22, 09:30 UTC | Apr 22, 09:40 UTC | 10m |
| 2026-04-21 | OKA3022 | XAI → TSN | Apr 21, 08:20 UTC | Apr 21, 08:30 UTC | 10m |
| 2026-04-21 | OKA3021 | TSN → XAI | Apr 21, 06:05 UTC | Apr 21, 06:30 UTC | 25m |
| 2026-04-18 | OKA3022 | XAI → TSN | Apr 18, 09:00 UTC | Apr 18, 09:10 UTC | 10m |
| 2026-04-18 | OKA3021 | TSN → XAI | Apr 18, 05:20 UTC | Apr 18, 05:30 UTC | 10m |
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-5843 page for operator, model, and routing details .