Apparatus

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sensors Mode-S transponder

7809A4

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-6973 · AIRBUS A-321

Hex
7809A4
Octal
36004644
Decimal
7,866,788
Country
CN
Tail
B-6973
Type
A321
No current signal · last broadcast 13h ago
Flights observed
91
Distinct callsigns
20
Country
CN
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 7809A4.

Country allocation

The ICAO 24-bit address 7809A4 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
CCA1483 - 7 2026-07-01
CCA1841 Air China 3 2026-05-09
CCA1571 - 3 2026-07-07
CCA1369 - 3 2026-07-16
CCA1288 - 3 2026-07-03
CCA1228 - 3 2026-07-03
CCA1227 - 3 2026-07-03
CCA1929 - 2 2026-07-08
CCA1925 - 2 2026-07-15
CCA1905 - 2 2026-07-04
CCA1859 Air China 2 2026-05-03
CCA1704 - 2 2026-06-29
CCA1311 Air China 2 2026-05-08
CCA1309 - 2 2026-07-18
CCA1287 - 2 2026-07-03
CCA9793 - 1 2026-07-12
CCA9693 - 1 2026-07-11
CCA8212 Air China 1 2026-05-28
CCA1959 - 1 2026-07-12
CCA1919 Air China 1 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 CCA1309 - Jul 18, 12:20 UTCJul 18, 12:40 UTC20m
2026-07-18 CCA1361 - Jul 18, 00:45 UTCJul 18, 01:10 UTC25m
2026-07-16 CCA1309 - Jul 16, 11:10 UTCJul 16, 11:25 UTC15m
2026-07-16 CCA1369 - Jul 16, 00:00 UTCJul 16, 00:15 UTC15m
2026-07-15 CCA1925 - Jul 15, 06:50 UTCJul 15, 07:05 UTC15m
2026-07-14 CCA1247 - Jul 14, 12:55 UTCJul 15, 03:25 UTC14h 29m
2026-07-14 CCA1716 - Jul 14, 06:15 UTCJul 14, 06:25 UTC10m
2026-07-13 CCA1377 - Jul 13, 07:30 UTCJul 13, 10:30 UTC3h 0m
2026-07-12 CCA9793 - Jul 12, 12:40 UTCJul 12, 12:50 UTC10m
2026-07-12 CCA1959 - Jul 12, 02:40 UTCJul 12, 03:05 UTC25m
2026-07-11 CCA9693 - Jul 11, 18:00 UTCJul 11, 18:10 UTC10m
2026-07-11 - - Jul 11, 07:15 UTCJul 11, 07:25 UTC10m
2026-07-11 CCA1817 - Jul 11, 01:10 UTCJul 11, 01:20 UTC10m
2026-07-10 CCA1718 - Jul 10, 08:30 UTCJul 10, 08:45 UTC15m
2026-07-08 CCA1929 - Jul 8, 10:20 UTCJul 8, 10:35 UTC15m
2026-07-08 CCA1370 - Jul 8, 08:15 UTCJul 8, 08:25 UTC10m
2026-07-07 CCA1369 PEK → SYX Jul 7, 23:35 UTCJul 8, 05:15 UTC5h 40m
2026-07-07 CCA1571 - Jul 7, 15:40 UTCJul 7, 15:50 UTC10m
2026-07-07 CCA1286 - Jul 7, 10:15 UTCJul 7, 10:40 UTC25m
2026-07-07 CCA1285 - Jul 7, 04:00 UTCJul 7, 04:20 UTC20m
2026-07-06 CCA1813 - Jul 6, 00:15 UTCJul 6, 00:25 UTC10m
2026-07-04 CCA1566 - Jul 4, 16:25 UTCJul 4, 16:40 UTC15m
2026-07-04 CCA1906 - Jul 4, 08:20 UTCJul 4, 08:30 UTC10m
2026-07-04 CCA1905 - Jul 4, 03:40 UTCJul 4, 03:50 UTC10m
2026-07-04 CCA1905 - Jul 4, 01:05 UTCJul 4, 01:25 UTC20m
2026-07-03 CCA1288 - Jul 3, 17:05 UTCJul 3, 17:25 UTC20m
2026-07-03 CCA1287 - Jul 3, 10:35 UTCJul 3, 10:55 UTC20m
2026-07-03 CCA1228 - Jul 3, 08:15 UTCJul 3, 08:30 UTC15m
2026-07-03 CCA1227 - Jul 3, 04:35 UTCJul 3, 04:55 UTC20m
2026-07-02 CCA1415 - Jul 2, 02:05 UTCJul 2, 02:20 UTC15m
2026-07-01 CCA1483 - Jul 1, 04:55 UTCJul 1, 05:15 UTC20m
2026-06-29 CCA1704 - Jun 29, 23:44 UTCJun 29, 23:54 UTC10m
2026-06-26 CCA1929 PEK → YIH Jun 26, 11:24 UTCJun 26, 11:40 UTC15m
2026-06-26 CCA1228 - Jun 26, 08:05 UTCJun 26, 08:20 UTC15m
2026-06-26 CCA1227 - Jun 26, 04:14 UTCJun 26, 04:34 UTC20m
2026-06-26 CCA1218 - Jun 26, 02:14 UTCJun 26, 02:34 UTC20m
2026-06-25 CCA1217 - Jun 25, 13:09 UTCJun 25, 13:29 UTC20m
2026-06-25 CCA1843 - Jun 25, 06:00 UTCJun 25, 06:09 UTC10m
2026-06-24 CCA1807 - Jun 24, 11:05 UTCJun 24, 11:14 UTC10m
2026-06-24 CCA1706 - Jun 24, 00:55 UTCJun 24, 01:04 UTC10m
2026-06-23 CCA1483 - Jun 23, 04:55 UTCJun 23, 05:09 UTC15m
2026-06-22 CCA1206 - Jun 22, 14:10 UTCJun 23, 02:04 UTC11h 55m
2026-06-22 CCA1483 - Jun 22, 05:10 UTCJun 22, 05:24 UTC15m
2026-06-21 CCA1228 - Jun 21, 08:04 UTCJun 21, 08:20 UTC15m
2026-06-21 CCA1227 - Jun 21, 04:14 UTCJun 21, 04:39 UTC25m
2026-06-20 CCA1554 - Jun 20, 03:59 UTCJun 20, 04:14 UTC15m
2026-06-19 CCA1145 PEK → TYN Jun 19, 23:00 UTCJun 19, 23:19 UTC20m
2026-06-19 CCA1571 PEK → TAO Jun 19, 11:24 UTCJun 19, 11:34 UTC10m
2026-06-13 CCA1704 PEK → HGH Jun 13, 00:25 UTCJun 13, 00:35 UTC10m
2026-06-12 CCA1572 - Jun 12, 13:50 UTCJun 12, 14:05 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-6973 page for operator, model, and routing details .

Mode-S 7809A4 frequently asked

What is Mode-S code 7809A4?
7809A4 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-6973.
Where is Mode-S 7809A4 registered?
Mode-S code 7809A4 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7809A4 broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7809A4, octal 36004644, decimal 7,866,788.
What flights does 7809A4 operate?
Mode-S 7809A4 has broadcast 20 distinct callsigns, including CCA1483, CCA1841, CCA1571, CCA1369, CCA1288.