Apparatus

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sensors Mode-S transponder

7806A1

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-5549 · BOEING 737-800

Hex
7806A1
Octal
36003241
Decimal
7,866,017
Country
CN
Tail
B-5549
Type
B738
No current signal · last broadcast 1d ago
Flights observed
98
Distinct callsigns
20
Country
CN
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 7806A1.

Country allocation

The ICAO 24-bit address 7806A1 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
CUA5858 - 26 2026-07-13
CUA5857 - 14 2026-07-13
CUA5652 - 8 2026-07-16
CUA5651 - 8 2026-07-15
CUA5519 - 7 2026-07-05
CUA5876 - 5 2026-07-10
CUA5852 - 4 2026-07-03
CUA5811 China United Airlines 3 2026-06-28
CUA5686 - 3 2026-07-09
CUA5685 - 3 2026-07-09
CUA5525 China United Airlines 3 2026-05-06
CUA5955 - 1 2026-07-07
CUA5890 China United Airlines 1 2026-06-08
CUA5851 China United Airlines 1 2026-05-01
CUA5829 China United Airlines 1 2026-06-11
CUA5818 - 1 2026-06-29
CUA5812 China United Airlines 1 2026-06-28
CUA5612 China United Airlines 1 2026-06-07
CUA5611 China United Airlines 1 2026-06-07
CUA5597 China United Airlines 1 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 CUA5652 - Jul 16, 06:40 UTCJul 16, 06:55 UTC15m
2026-07-15 CUA5651 - Jul 15, 23:20 UTCJul 15, 23:30 UTC10m
2026-07-15 CUA5652 - Jul 15, 06:40 UTCJul 15, 06:55 UTC15m
2026-07-14 CUA5651 - Jul 14, 23:15 UTCJul 14, 23:40 UTC25m
2026-07-14 CUA5652 - Jul 14, 06:55 UTCJul 14, 07:10 UTC15m
2026-07-13 CUA5651 - Jul 13, 23:25 UTCJul 13, 23:35 UTC10m
2026-07-13 CUA5858 - Jul 13, 04:00 UTCJul 13, 04:10 UTC10m
2026-07-13 CUA5857 - Jul 13, 02:01 UTCJul 13, 02:10 UTC10m
2026-07-11 CUA5858 - Jul 11, 03:55 UTCJul 11, 04:05 UTC10m
2026-07-11 CUA5857 - Jul 11, 02:00 UTCJul 11, 02:20 UTC20m
2026-07-10 CUA5876 - Jul 10, 05:20 UTCJul 10, 05:30 UTC10m
2026-07-09 CUA5686 - Jul 9, 14:15 UTCJul 9, 14:25 UTC10m
2026-07-09 CUA5685 - Jul 9, 08:05 UTCJul 9, 08:15 UTC10m
2026-07-08 CUA5652 - Jul 8, 06:40 UTCJul 8, 06:55 UTC15m
2026-07-07 CUA5651 - Jul 7, 23:15 UTCJul 7, 23:30 UTC15m
2026-07-07 CUA5955 - Jul 7, 10:50 UTCJul 7, 11:05 UTC15m
2026-07-06 CUA5652 - Jul 6, 23:15 UTCJul 7, 07:05 UTC7h 50m
2026-07-06 CUA5686 - Jul 6, 14:40 UTCJul 6, 14:55 UTC15m
2026-07-06 CUA5685 - Jul 6, 08:40 UTCJul 6, 08:55 UTC15m
2026-07-05 CUA5519 - Jul 5, 23:25 UTCJul 5, 23:35 UTC10m
2026-07-05 CUA5652 - Jul 5, 06:55 UTCJul 5, 07:05 UTC10m
2026-07-04 CUA5651 - Jul 4, 23:15 UTCJul 4, 23:35 UTC20m
2026-07-04 CUA5651 - Jul 4, 02:15 UTCJul 4, 09:45 UTC7h 30m
2026-07-03 CUA5852 - Jul 3, 11:00 UTCJul 3, 11:10 UTC10m
2026-07-02 CUA5858 - Jul 2, 03:55 UTCJul 2, 04:05 UTC10m
2026-07-02 CUA5857 - Jul 2, 02:30 UTCJul 2, 02:40 UTC10m
2026-07-01 CUA5686 - Jul 1, 14:25 UTCJul 1, 14:35 UTC10m
2026-07-01 CUA5685 - Jul 1, 08:15 UTCJul 1, 08:25 UTC10m
2026-06-30 CUA5529 - Jun 30, 10:30 UTCJun 30, 10:45 UTC15m
2026-06-29 CUA5818 - Jun 29, 11:10 UTCJun 29, 11:20 UTC10m
2026-06-28 CUA5812 HAK → PKX Jun 28, 14:30 UTCJun 28, 14:39 UTC10m
2026-06-28 CUA5811 PKX → HAK Jun 28, 08:44 UTCJun 28, 08:55 UTC10m
2026-06-27 CUA5519 - Jun 27, 23:25 UTCJun 27, 23:34 UTC10m
2026-06-27 CUA5858 - Jun 27, 03:49 UTCJun 27, 04:00 UTC10m
2026-06-26 CUA5811 PKX → HAK Jun 26, 10:55 UTCJun 26, 11:05 UTC10m
2026-06-25 CUA5519 - Jun 25, 23:30 UTCJun 25, 23:39 UTC10m
2026-06-25 CUA5858 - Jun 25, 03:59 UTCJun 25, 04:10 UTC10m
2026-06-22 CUA5858 - Jun 22, 03:50 UTCJun 22, 04:00 UTC10m
2026-06-20 CUA5519 - Jun 20, 23:25 UTCJun 20, 23:34 UTC10m
2026-06-20 CUA5858 - Jun 20, 03:44 UTCJun 20, 03:59 UTC15m
2026-06-20 CUA5857 - Jun 20, 02:00 UTCJun 20, 02:09 UTC10m
2026-06-19 CUA5876 - Jun 19, 06:20 UTCJun 19, 06:29 UTC10m
2026-06-17 CUA5858 - Jun 17, 03:55 UTCJun 17, 04:05 UTC10m
2026-06-11 CUA5829 PKX → CAN Jun 11, 10:00 UTCJun 11, 10:20 UTC20m
2026-06-09 CUA5858 SZX → PKX Jun 9, 03:45 UTCJun 9, 03:55 UTC10m
2026-06-08 CUA5890 ZHA → PKX Jun 8, 14:30 UTCJun 8, 14:45 UTC15m
2026-06-07 CUA5612 URC → PKX Jun 7, 08:45 UTCJun 7, 09:05 UTC20m
2026-06-07 CUA5611 PKX → URC Jun 7, 00:25 UTCJun 7, 00:34 UTC10m
2026-06-05 CUA5521 PKX → HLD Jun 5, 09:50 UTCJun 5, 10:05 UTC15m
2026-05-30 CUA5811 - May 30, 08:30 UTCMay 30, 08:45 UTC15m

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-5549 page for operator, model, and routing details .

Mode-S 7806A1 frequently asked

What is Mode-S code 7806A1?
7806A1 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-5549.
Where is Mode-S 7806A1 registered?
Mode-S code 7806A1 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7806A1 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7806A1, octal 36003241, decimal 7,866,017.
What flights does 7806A1 operate?
Mode-S 7806A1 has broadcast 20 distinct callsigns, including CUA5858, CUA5857, CUA5652, CUA5651, CUA5519.