Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

780B81

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-5858 · BOEING 737-800

Hex
780B81
Octal
36005601
Decimal
7,867,265
Country
CN
Tail
B-5858
Type
B738
No current signal · last broadcast 23h ago
Flights observed
57
Distinct callsigns
17
Country
CN
Last broadcast
23h ago

Last known position

Most recent position reported by Mode-S 780B81.

Country allocation

The ICAO 24-bit address 780B81 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 17 distinct

Callsign Airline Flights Last seen
CUA5858 China United Airlines 15 2026-06-11
CUA5857 China United Airlines 14 2026-06-11
CUA5519 China United Airlines 8 2026-06-11
CUA5876 China United Airlines 3 2026-05-29
CUA5852 China United Airlines 2 2026-05-25
CUA5811 China United Airlines 2 2026-06-15
CUA5686 China United Airlines 2 2026-06-06
CUA5685 China United Airlines 2 2026-06-06
CUA5851 China United Airlines 1 2026-05-04
CUA5838 - 1 2026-05-03
CUA5812 China United Airlines 1 2026-06-03
CUA5678 - 1 2026-06-04
CUA5677 - 1 2026-06-04
CUA5651 - 1 2026-05-07
CUA5525 China United Airlines 1 2026-05-04
CUA5509 China United Airlines 1 2026-05-06
CUA5396 China United Airlines 1 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-15 CUA5811 PKX → HAK Jun 15, 08:54 UTCJun 15, 09:05 UTC10m
2026-06-12 CUA5811 PKX → HAK Jun 12, 08:50 UTCJun 12, 11:10 UTC2h 20m
2026-06-11 CUA5519 PKX → LDS Jun 11, 23:25 UTCJun 11, 23:40 UTC15m
2026-06-11 CUA5858 SZX → PKX Jun 11, 03:50 UTCJun 11, 04:00 UTC10m
2026-06-11 CUA5857 PKX → SZX Jun 11, 02:05 UTCJun 11, 02:15 UTC10m
2026-06-08 CUA5519 PKX → LDS Jun 8, 23:20 UTCJun 8, 23:30 UTC10m
2026-06-08 CUA5858 SZX → PKX Jun 8, 03:50 UTCJun 8, 04:05 UTC15m
2026-06-08 CUA5857 PKX → SZX Jun 8, 02:00 UTCJun 8, 02:15 UTC15m
2026-06-07 CUA5858 SZX → PKX Jun 7, 03:55 UTCJun 7, 04:05 UTC10m
2026-06-07 CUA5857 PKX → SZX Jun 7, 01:45 UTCJun 7, 02:04 UTC20m
2026-06-06 CUA5686 HMI → PKX Jun 6, 14:09 UTCJun 6, 14:25 UTC15m
2026-06-06 CUA5685 PKX → HMI Jun 6, 08:00 UTCJun 6, 08:15 UTC15m
2026-06-04 CUA5519 PKX → LDS Jun 4, 23:25 UTCJun 4, 23:35 UTC10m
2026-06-04 CUA5678 - Jun 4, 12:50 UTCJun 4, 13:05 UTC15m
2026-06-04 CUA5677 - Jun 4, 04:15 UTCJun 4, 04:35 UTC20m
2026-06-03 CUA5812 HAK → PKX Jun 3, 09:00 UTCJun 3, 13:55 UTC4h 55m
2026-06-02 CUA5519 PKX → LDS Jun 2, 23:30 UTCJun 2, 23:45 UTC15m
2026-06-01 CUA5858 SZX → PKX Jun 1, 03:45 UTCJun 1, 04:00 UTC15m
2026-06-01 CUA5857 PKX → SZX Jun 1, 01:55 UTCJun 1, 02:20 UTC25m
2026-05-30 CUA5519 PKX → LDS May 30, 23:25 UTCMay 30, 23:35 UTC10m
2026-05-30 CUA5858 SZX → PKX May 30, 03:50 UTCMay 30, 04:05 UTC15m
2026-05-30 CUA5857 PKX → SZX May 30, 01:50 UTCMay 30, 02:10 UTC20m
2026-05-29 CUA5876 ZUH → PKX May 29, 05:20 UTCMay 29, 05:30 UTC10m
2026-05-28 CUA5858 SZX → PKX May 28, 03:50 UTCMay 28, 04:05 UTC15m
2026-05-28 CUA5857 PKX → SZX May 28, 02:05 UTCMay 28, 02:15 UTC10m
2026-05-26 CUA5519 PKX → LDS May 26, 23:25 UTCMay 26, 23:35 UTC10m
2026-05-26 CUA5858 SZX → PKX May 26, 03:50 UTCMay 26, 04:00 UTC10m
2026-05-26 CUA5857 PKX → SZX May 26, 02:00 UTCMay 26, 02:19 UTC20m
2026-05-25 CUA5852 SZX → PKX May 25, 10:05 UTCMay 25, 10:15 UTC10m
2026-05-24 CUA5858 SZX → PKX May 24, 03:55 UTCMay 24, 04:05 UTC10m
2026-05-24 CUA5857 PKX → SZX May 24, 02:00 UTCMay 24, 02:20 UTC20m
2026-05-20 CUA5858 SZX → PKX May 20, 03:50 UTCMay 20, 04:05 UTC15m
2026-05-19 CUA5876 ZUH → PKX May 19, 06:00 UTCMay 19, 06:15 UTC15m
2026-05-17 CUA5519 PKX → LDS May 17, 23:25 UTCMay 17, 23:35 UTC10m
2026-05-15 CUA5858 SZX → PKX May 15, 03:45 UTCMay 15, 03:55 UTC10m
2026-05-15 CUA5857 PKX → SZX May 15, 01:55 UTCMay 15, 02:10 UTC15m
2026-05-11 CUA5876 ZUH → PKX May 11, 05:10 UTCMay 11, 05:30 UTC20m
2026-05-08 CUA5519 PKX → LDS May 8, 23:30 UTCMay 8, 23:40 UTC10m
2026-05-08 CUA5858 SZX → PKX May 8, 03:55 UTCMay 8, 04:04 UTC10m
2026-05-08 CUA5857 PKX → SZX May 8, 01:55 UTCMay 8, 02:19 UTC25m
2026-05-07 CUA5651 - May 7, 06:35 UTCMay 7, 14:05 UTC7h 30m
2026-05-06 CUA5509 PKX → JXA May 6, 23:30 UTCMay 6, 23:45 UTC15m
2026-05-06 CUA5858 SZX → PKX May 6, 03:50 UTCMay 6, 04:00 UTC10m
2026-05-06 CUA5857 PKX → SZX May 6, 01:45 UTCMay 6, 02:05 UTC20m
2026-05-05 CUA5686 HMI → PKX May 5, 15:15 UTCMay 5, 15:30 UTC15m
2026-05-05 CUA5685 PKX → HMI May 5, 09:00 UTCMay 5, 09:15 UTC15m
2026-05-05 CUA5858 SZX → PKX May 5, 03:45 UTCMay 5, 04:00 UTC15m
2026-05-05 CUA5857 PKX → SZX May 5, 01:55 UTCMay 5, 02:15 UTC20m
2026-05-04 CUA5852 SZX → PKX May 4, 10:15 UTCMay 4, 10:25 UTC10m
2026-05-04 CUA5851 PKX → SZX May 4, 08:20 UTCMay 4, 08:45 UTC25m

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-5858 page for operator, model, and routing details .

Mode-S 780B81 frequently asked

What is Mode-S code 780B81?
780B81 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-5858.
Where is Mode-S 780B81 registered?
Mode-S code 780B81 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 780B81 broadcasting right now?
No active broadcast right now. Last signal was 23h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 780B81, octal 36005601, decimal 7,867,265.
What flights does 780B81 operate?
Mode-S 780B81 has broadcast 17 distinct callsigns, including CUA5858, CUA5857, CUA5519, CUA5876, CUA5852.