Apparatus

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sensors Mode-S transponder

7817CB

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-30AT · AIRBUS A-320neo

Hex
7817CB
Octal
36013713
Decimal
7,870,411
Country
CN
Tail
B-30AT
Type
A20N
No current signal · last broadcast 7h ago
Flights observed
75
Distinct callsigns
16
Country
CN
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 7817CB.

Country allocation

The ICAO 24-bit address 7817CB 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 16 distinct

Callsign Airline Flights Last seen
QDA918 - 9 2026-07-14
QDA917 - 9 2026-07-14
QDA909 - 9 2026-07-12
QDA910 - 7 2026-07-12
QDA920 Qingdao Airlines 6 2026-05-31
QDA902 - 6 2026-07-12
QDA901 - 6 2026-07-12
QDA9819 - 5 2026-05-30
QDA9820 - 3 2026-05-30
QDA904 - 3 2026-07-10
QDA6054 Qingdao Airlines 3 2026-05-17
QDA919 Qingdao Airlines 2 2026-05-31
QDA916 - 2 2026-07-11
QDA915 - 2 2026-07-11
QDA903 - 2 2026-07-10
QDA9865 - 1 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 QDA918 - Jul 14, 11:35 UTCJul 14, 13:15 UTC1h 40m
2026-07-14 QDA917 - Jul 14, 09:35 UTCJul 14, 10:15 UTC40m
2026-07-14 QDA917 - Jul 14, 08:20 UTCJul 14, 08:30 UTC10m
2026-07-12 QDA902 - Jul 12, 13:40 UTCJul 12, 13:55 UTC15m
2026-07-12 QDA901 - Jul 12, 12:05 UTCJul 12, 12:25 UTC20m
2026-07-12 QDA910 - Jul 12, 04:45 UTCJul 12, 06:15 UTC1h 30m
2026-07-12 QDA909 - Jul 12, 01:45 UTCJul 12, 03:20 UTC1h 35m
2026-07-11 QDA9865 - Jul 11, 11:10 UTCJul 11, 11:40 UTC30m
2026-07-11 QDA916 - Jul 11, 06:15 UTCJul 11, 06:30 UTC15m
2026-07-11 QDA915 - Jul 11, 03:30 UTCJul 11, 04:15 UTC45m
2026-07-10 QDA904 - Jul 10, 04:55 UTCJul 11, 04:15 UTC23h 20m
2026-07-10 QDA904 - Jul 10, 04:10 UTCJul 10, 05:35 UTC1h 25m
2026-07-10 QDA903 - Jul 10, 01:15 UTCJul 10, 02:50 UTC1h 35m
2026-07-08 QDA918 - Jul 8, 11:45 UTCJul 8, 13:25 UTC1h 40m
2026-07-08 QDA917 - Jul 8, 08:35 UTCJul 8, 10:20 UTC1h 45m
2026-06-27 QDA918 - Jun 27, 12:04 UTCJun 27, 13:49 UTC1h 45m
2026-06-27 QDA917 - Jun 27, 08:25 UTCJun 27, 10:40 UTC2h 15m
2026-06-23 QDA916 - Jun 23, 06:19 UTCJun 23, 07:29 UTC1h 10m
2026-06-23 QDA915 - Jun 23, 04:00 UTCJun 23, 04:14 UTC15m
2026-06-22 QDA918 - Jun 22, 13:25 UTCJun 23, 03:04 UTC13h 40m
2026-06-22 QDA918 - Jun 22, 12:30 UTCJun 22, 12:44 UTC15m
2026-06-22 QDA917 - Jun 22, 09:19 UTCJun 22, 11:09 UTC1h 50m
2026-06-18 QDA918 - Jun 18, 12:15 UTCJun 18, 14:01 UTC1h 45m
2026-06-18 QDA917 - Jun 18, 08:10 UTCJun 18, 10:50 UTC2h 40m
2026-06-13 QDA918 BKK → TAO Jun 13, 11:20 UTCJun 13, 13:15 UTC1h 55m
2026-06-13 QDA917 - Jun 13, 08:15 UTCJun 13, 09:55 UTC1h 40m
2026-05-31 QDA920 TAE → TAO May 31, 13:10 UTCMay 31, 13:50 UTC40m
2026-05-31 QDA919 TAO → TAE May 31, 11:05 UTCMay 31, 11:35 UTC30m
2026-05-30 QDA902 ICN → TAO May 30, 13:35 UTCMay 30, 14:00 UTC25m
2026-05-30 QDA901 TAO → ICN May 30, 11:45 UTCMay 30, 12:20 UTC35m
2026-05-30 QDA9820 - May 30, 05:35 UTCMay 30, 06:05 UTC30m
2026-05-30 QDA9819 - May 30, 02:40 UTCMay 30, 03:05 UTC25m
2026-05-28 QDA902 ICN → TAO May 28, 13:55 UTCMay 28, 14:25 UTC30m
2026-05-28 QDA901 TAO → ICN May 28, 12:05 UTCMay 28, 12:30 UTC25m
2026-05-28 QDA9819 - May 28, 02:45 UTCMay 28, 06:00 UTC3h 15m
2026-05-27 QDA920 TAE → TAO May 27, 13:15 UTCMay 27, 13:55 UTC40m
2026-05-27 QDA919 TAO → TAE May 27, 11:10 UTCMay 27, 12:00 UTC50m
2026-05-27 QDA910 NGO → TAO May 27, 04:45 UTCMay 27, 06:25 UTC1h 40m
2026-05-27 QDA909 TAO → NGO May 27, 01:59 UTCMay 27, 03:29 UTC1h 30m
2026-05-25 QDA9820 - May 25, 08:10 UTCMay 25, 08:25 UTC15m
2026-05-25 QDA9819 - May 25, 05:05 UTCMay 25, 05:25 UTC20m
2026-05-23 QDA902 ICN → TAO May 23, 13:40 UTCMay 23, 14:05 UTC25m
2026-05-23 QDA901 TAO → ICN May 23, 11:40 UTCMay 23, 12:10 UTC30m
2026-05-23 QDA9819 - May 23, 02:40 UTCMay 23, 05:55 UTC3h 15m
2026-05-20 QDA920 TAE → TAO May 20, 13:05 UTCMay 20, 13:55 UTC50m
2026-05-20 QDA910 NGO → TAO May 20, 04:50 UTCMay 20, 11:55 UTC7h 5m
2026-05-20 QDA909 TAO → NGO May 20, 01:50 UTCMay 20, 03:15 UTC1h 25m
2026-05-18 QDA902 ICN → TAO May 18, 13:50 UTCMay 18, 14:10 UTC20m
2026-05-18 QDA901 TAO → ICN May 18, 12:00 UTCMay 18, 12:25 UTC25m
2026-05-17 QDA6054 LYA → SHE May 17, 12:15 UTCMay 17, 12:25 UTC10m

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-30AT page for operator, model, and routing details .

Mode-S 7817CB frequently asked

What is Mode-S code 7817CB?
7817CB is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-30AT.
Where is Mode-S 7817CB registered?
Mode-S code 7817CB is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7817CB broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7817CB, octal 36013713, decimal 7,870,411.
What flights does 7817CB operate?
Mode-S 7817CB has broadcast 16 distinct callsigns, including QDA918, QDA917, QDA909, QDA910, QDA920.