Apparatus

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sensors Mode-S transponder

7823AA

ICAO 24-bit transponder address · allocated to China

Hex
7823AA
Octal
36021652
Decimal
7,873,450
Country
CN
No current signal · last broadcast Jul 26, 12:50 UTC
Flights observed
67
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 12:50 UTC

Last known position

Most recent position reported by Mode-S 7823AA.

Country allocation

The ICAO 24-bit address 7823AA 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
CCA809 Air China 5 2026-07-24
CCA1821 Air China 3 2026-07-20
CCA1525 - 3 2026-07-22
CCA1908 - 2 2026-07-15
CCA1691 - 2 2026-07-13
CCA1635 - 2 2026-07-19
CCA1607 Air China 2 2026-07-20
CCA1575 Air China 2 2026-07-20
CCA9793 Air China 1 2026-07-25
CCA811 - 1 2026-07-14
CCA745 - 1 2026-07-12
CCA4108 - 1 2026-06-22
CCA1935 - 1 2026-07-22
CCA1932 Air China 1 2026-07-25
CCA1931 Air China 1 2026-07-24
CCA1907 - 1 2026-07-15
CCA1847 Air China 1 2026-07-23
CCA1809 - 1 2026-07-13
CCA1807 - 1 2026-06-29
CCA1801 - 1 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CCA1574 - Jul 26, 12:35 UTCJul 26, 12:50 UTC15m
2026-07-25 CCA9793 PEK → JMU Jul 25, 13:20 UTCJul 25, 13:30 UTC10m
2026-07-25 CCA1373 PEK → CSX Jul 25, 06:10 UTCJul 25, 06:30 UTC20m
2026-07-25 CCA1932 NNG → PEK Jul 25, 02:30 UTCJul 25, 03:00 UTC30m
2026-07-24 CCA1931 PEK → NNG Jul 24, 12:20 UTCJul 24, 12:55 UTC35m
2026-07-24 CCA809 PEK → VVO Jul 24, 03:40 UTCJul 24, 03:50 UTC10m
2026-07-23 CCA1847 PEK → NKG Jul 23, 06:05 UTCJul 23, 06:15 UTC10m
2026-07-22 CCA1525 - Jul 22, 13:00 UTCJul 22, 13:10 UTC10m
2026-07-22 CCA1935 - Jul 22, 03:10 UTCJul 22, 03:35 UTC25m
2026-07-21 CCA809 PEK → VVO Jul 21, 05:00 UTCJul 21, 05:15 UTC15m
2026-07-20 CCA1821 PEK → FOC Jul 20, 18:45 UTCJul 20, 18:55 UTC10m
2026-07-20 CCA1607 PEK → HRB Jul 20, 07:00 UTCJul 20, 07:10 UTC10m
2026-07-20 CCA1575 PEK → TAO Jul 20, 01:25 UTCJul 20, 01:35 UTC10m
2026-07-19 CCA1635 - Jul 19, 11:15 UTCJul 19, 11:25 UTC10m
2026-07-19 CCA809 - Jul 19, 03:45 UTCJul 19, 03:55 UTC10m
2026-07-18 CCA1525 - Jul 18, 13:05 UTCJul 18, 13:15 UTC10m
2026-07-17 CCA1371 - Jul 17, 05:15 UTCJul 17, 05:30 UTC15m
2026-07-16 CCA1732 - Jul 16, 14:20 UTCJul 16, 14:29 UTC10m
2026-07-16 CCA1623 - Jul 16, 04:25 UTCJul 16, 04:35 UTC10m
2026-07-15 CCA1908 - Jul 15, 23:45 UTCJul 16, 00:00 UTC15m
2026-07-15 CCA1907 - Jul 15, 11:35 UTCJul 15, 11:50 UTC15m
2026-07-15 CCA1712 - Jul 15, 04:15 UTCJul 15, 04:25 UTC10m
2026-07-14 CCA1801 - Jul 14, 13:20 UTCJul 14, 13:35 UTC15m
2026-07-14 CCA811 - Jul 14, 05:35 UTCJul 14, 05:45 UTC10m
2026-07-13 CCA1691 - Jul 13, 22:45 UTCJul 13, 22:55 UTC10m
2026-07-13 CCA1395 - Jul 13, 10:35 UTCJul 13, 10:45 UTC10m
2026-07-13 CCA1809 - Jul 13, 01:55 UTCJul 13, 02:10 UTC15m
2026-07-12 CCA745 - Jul 12, 11:25 UTCJul 12, 18:55 UTC7h 30m
2026-07-12 CCA1224 - Jul 12, 08:40 UTCJul 12, 09:05 UTC25m
2026-07-12 CCA1223 - Jul 12, 04:10 UTCJul 12, 04:35 UTC25m
2026-07-11 CCA1908 - Jul 11, 23:45 UTCJul 11, 23:55 UTC10m
2026-07-10 CCA1525 - Jul 10, 14:55 UTCJul 10, 15:05 UTC10m
2026-07-10 CCA1692 - Jul 10, 03:35 UTCJul 10, 03:50 UTC15m
2026-07-09 CCA1691 - Jul 9, 22:30 UTCJul 9, 22:45 UTC15m
2026-07-09 CCA1635 - Jul 9, 11:15 UTCJul 9, 11:30 UTC15m
2026-07-09 CCA809 - Jul 9, 03:30 UTCJul 9, 03:40 UTC10m
2026-07-08 CCA1821 - Jul 8, 16:15 UTCJul 8, 16:30 UTC15m
2026-07-08 CCA1607 - Jul 8, 07:10 UTCJul 8, 07:20 UTC10m
2026-07-08 CCA1575 - Jul 8, 01:20 UTCJul 8, 01:30 UTC10m
2026-07-07 CCA1544 - Jul 7, 11:55 UTCJul 7, 12:05 UTC10m
2026-07-07 CCA1537 - Jul 7, 02:30 UTCJul 7, 02:40 UTC10m
2026-07-06 CCA1238 - Jul 6, 05:20 UTCJul 6, 05:40 UTC20m
2026-07-05 CCA1237 PEK → HMI Jul 5, 22:25 UTCJul 5, 22:45 UTC20m
2026-07-05 CCA1421 - Jul 5, 00:50 UTCJul 5, 01:15 UTC25m
2026-07-04 CCA1434 - Jul 4, 08:20 UTCJul 4, 08:30 UTC10m
2026-07-04 CCA1433 - Jul 4, 01:50 UTCJul 4, 02:15 UTC25m
2026-07-03 CCA1647 - Jul 3, 12:05 UTCJul 3, 12:15 UTC10m
2026-07-03 CCA1554 - Jul 3, 04:35 UTCJul 3, 04:50 UTC15m
2026-07-02 CCA1292 - Jul 2, 16:30 UTCJul 2, 16:45 UTC15m
2026-07-01 CCA1213 - Jul 1, 23:45 UTCJul 2, 08:20 UTC8h 35m

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.

Mode-S 7823AA frequently asked

What is Mode-S code 7823AA?
7823AA is an ICAO 24-bit transponder address. Allocated to China.
Where is Mode-S 7823AA registered?
Mode-S code 7823AA is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7823AA broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 12:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7823AA, octal 36021652, decimal 7,873,450.
What flights does 7823AA operate?
Mode-S 7823AA has broadcast 20 distinct callsigns, including CCA809, CCA1821, CCA1525, CCA1908, CCA1691.