Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

7803CD

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-7371 · BOEING 737-800

Hex
7803CD
Octal
36001715
Decimal
7,865,293
Country
CN
Tail
B-7371
Type
B738
No current signal · last broadcast Jul 26, 12:00 UTC
Flights observed
55
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 12:00 UTC

Last known position

Most recent position reported by Mode-S 7803CD.

Country allocation

The ICAO 24-bit address 7803CD 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
CUA5509 China United Airlines 4 2026-07-16
CUA5686 - 3 2026-06-28
CUA5396 China United Airlines 3 2026-04-27
CUA5852 China United Airlines 2 2026-06-12
CUA5851 China United Airlines 2 2026-06-12
CUA5732 China United Airlines 2 2026-05-21
CUA5685 - 2 2026-06-28
CUA5652 - 2 2026-06-23
CUA5651 - 2 2026-06-23
CUA5535 - 2 2026-07-18
CUA5290 - 2 2026-07-16
CUA2128 China United Airlines 2 2026-07-26
CUA5977 China United Airlines 1 2026-06-03
CUA5971 China United Airlines 1 2026-07-22
CUA5876 China United Airlines 1 2026-07-26
CUA5802 China United Airlines 1 2026-06-28
CUA5801 China United Airlines 1 2026-06-27
CUA5782 - 1 2026-07-08
CUA5738 - 1 2026-07-14
CUA5737 China United Airlines 1 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CUA5876 ZUH → PKX Jul 26, 11:50 UTCJul 26, 12:00 UTC10m
2026-07-26 CUA2128 DSN → PKX Jul 26, 00:45 UTCJul 26, 01:00 UTC15m
2026-07-22 CUA5971 PKX → YIW Jul 22, 03:10 UTCJul 22, 03:25 UTC15m
2026-07-22 CUA2128 - Jul 22, 00:35 UTCJul 22, 00:50 UTC15m
2026-07-20 CUA5737 FUO → SHA Jul 20, 23:50 UTCJul 21, 00:45 UTC55m
2026-07-18 CUA5531 - Jul 18, 11:00 UTCJul 18, 11:10 UTC10m
2026-07-18 CUA5535 - Jul 18, 05:10 UTCJul 18, 05:30 UTC20m
2026-07-16 CUA5509 PKX → JXA Jul 16, 23:15 UTCJul 16, 23:29 UTC15m
2026-07-16 CUA5589 - Jul 16, 11:10 UTCJul 16, 11:20 UTC10m
2026-07-16 CUA5290 - Jul 16, 03:40 UTCJul 16, 04:25 UTC45m
2026-07-14 CUA5738 - Jul 14, 07:05 UTCJul 14, 07:15 UTC10m
2026-07-12 CUA2126 - Jul 12, 02:40 UTCJul 12, 02:55 UTC15m
2026-07-08 CUA5782 - Jul 8, 12:40 UTCJul 8, 12:50 UTC10m
2026-07-07 CUA5158 - Jul 7, 15:45 UTCJul 7, 16:05 UTC20m
2026-07-06 CUA2867 - Jul 6, 07:20 UTCJul 6, 07:50 UTC30m
2026-06-28 CUA5686 - Jun 28, 14:25 UTCJun 28, 14:39 UTC15m
2026-06-28 CUA5685 - Jun 28, 08:09 UTCJun 28, 08:34 UTC25m
2026-06-28 CUA5802 DSN → PKX Jun 28, 05:29 UTCJun 28, 05:45 UTC15m
2026-06-27 CUA5801 PKX → DSN Jun 27, 08:35 UTCJun 27, 08:49 UTC15m
2026-06-25 CUA5530 - Jun 25, 14:04 UTCJun 25, 14:14 UTC10m
2026-06-25 CUA5529 - Jun 25, 10:30 UTCJun 25, 10:45 UTC15m
2026-06-23 CUA5652 - Jun 23, 13:45 UTCJun 23, 13:59 UTC15m
2026-06-23 CUA5651 - Jun 23, 06:15 UTCJun 23, 06:39 UTC25m
2026-06-22 CUA5509 PKX → JXA Jun 22, 23:20 UTCJun 22, 23:35 UTC15m
2026-06-20 CUA5119 - Jun 20, 03:19 UTCJun 20, 03:29 UTC10m
2026-06-12 CUA5852 SZX → PKX Jun 12, 13:40 UTCJun 12, 14:15 UTC35m
2026-06-12 CUA5852 SZX → PKX Jun 12, 11:05 UTCJun 12, 11:15 UTC10m
2026-06-12 CUA5851 PKX → SZX Jun 12, 09:15 UTCJun 12, 09:40 UTC25m
2026-06-12 CUA5525 PKX → YSQ Jun 12, 00:20 UTCJun 12, 00:35 UTC15m
2026-06-09 CUA5155 PKX → TFU Jun 9, 23:20 UTCJun 9, 23:30 UTC10m
2026-06-05 CUA2320 DBC → SJW Jun 5, 10:40 UTCJun 5, 10:50 UTC10m
2026-06-05 CUA2319 SJW → DBC Jun 5, 07:05 UTCJun 5, 07:20 UTC15m
2026-06-03 CUA5977 PKX → PVG Jun 3, 14:15 UTCJun 3, 14:35 UTC20m
2026-06-02 CUA5686 HMI → PKX Jun 2, 14:25 UTCJun 2, 14:45 UTC20m
2026-05-21 CUA5732 TFU → FUO May 21, 16:15 UTCMay 21, 16:25 UTC10m
2026-05-21 CUA5732 TFU → FUO May 21, 13:05 UTCMay 21, 13:25 UTC20m
2026-05-19 CUA5509 PKX → JXA May 19, 23:30 UTCMay 19, 23:40 UTC10m
2026-05-18 CUA5509 PKX → JXA May 18, 23:20 UTCMay 18, 23:35 UTC15m
2026-05-18 CUA5686 HMI → PKX May 18, 14:40 UTCMay 18, 14:55 UTC15m
2026-05-18 CUA5685 PKX → HMI May 18, 08:01 UTCMay 18, 08:15 UTC15m
2026-05-07 CUA5290 - May 7, 03:35 UTCMay 7, 04:10 UTC35m
2026-05-04 CUA5561 PKX → JXA May 4, 09:55 UTCMay 4, 10:05 UTC10m
2026-05-03 CUA5652 - May 3, 13:55 UTCMay 3, 14:10 UTC15m
2026-05-03 CUA5651 - May 3, 06:10 UTCMay 3, 06:35 UTC25m
2026-05-02 CUA5535 - May 2, 04:55 UTCMay 2, 05:10 UTC15m
2026-04-27 CUA5396 DSN → PKX Apr 27, 14:55 UTCApr 27, 15:10 UTC15m
2026-04-27 CUA5396 DSN → PKX Apr 27, 10:15 UTCApr 27, 10:25 UTC10m
2026-04-27 CUA5395 DSN → ZUH Apr 27, 08:30 UTCApr 27, 08:50 UTC20m
2026-04-25 CUA5006 - Apr 25, 14:15 UTCApr 25, 14:25 UTC10m
2026-04-25 CUA5005 - Apr 25, 12:30 UTCApr 25, 12:45 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-7371 page for operator, model, and routing details .

Mode-S 7803CD frequently asked

What is Mode-S code 7803CD?
7803CD is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-7371.
Where is Mode-S 7803CD registered?
Mode-S code 7803CD is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7803CD broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 12:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7803CD, octal 36001715, decimal 7,865,293.
What flights does 7803CD operate?
Mode-S 7803CD has broadcast 20 distinct callsigns, including CUA5509, CUA5686, CUA5396, CUA5852, CUA5851.