Apparatus

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sensors Mode-S transponder

7823B7

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32QS · AIRBUS A-320neo

Hex
7823B7
Octal
36021667
Decimal
7,873,463
Country
CN
Tail
B-32QS
Type
A20N
No current signal · last broadcast Jul 26, 13:00 UTC
Flights observed
193
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 13:00 UTC

Last known position

Most recent position reported by Mode-S 7823B7.

Country allocation

The ICAO 24-bit address 7823B7 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
CHH7939 Hainan Airlines 27 2026-07-25
CHH721 Hainan Airlines 22 2026-07-25
CHH722 Hainan Airlines 19 2026-07-26
CHH7940 Hainan Airlines 16 2026-07-26
CHH7304 Hainan Airlines 9 2026-06-20
CHH7204 - 9 2026-06-29
CHH7135 Hainan Airlines 6 2026-05-06
CHH7582 Hainan Airlines 5 2026-05-07
CHH7203 - 5 2026-06-29
CHH7688 Hainan Airlines 3 2026-06-08
CHH7577 Hainan Airlines 3 2026-05-04
CHH7390 Hainan Airlines 3 2026-06-18
CHH7246 Hainan Airlines 3 2026-05-05
CHH7245 Hainan Airlines 3 2026-05-05
CHH7112 Hainan Airlines 3 2026-05-04
CHH7111 Hainan Airlines 3 2026-05-04
CHH7055 - 3 2026-07-07
CHH7002 - 3 2026-07-15
CHH7687 Hainan Airlines 2 2026-06-13
CHH7581 Hainan Airlines 2 2026-04-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CHH722 BKK → HAK Jul 26, 12:30 UTCJul 26, 13:00 UTC30m
2026-07-26 CHH7940 BKK → HAK Jul 26, 04:25 UTCJul 26, 10:40 UTC6h 16m
2026-07-25 CHH7939 HAK → BKK Jul 25, 13:10 UTCJul 26, 02:35 UTC13h 25m
2026-07-25 CHH721 HAK → BKK Jul 25, 04:25 UTCJul 25, 11:50 UTC7h 25m
2026-07-24 CHH7939 HAK → BKK Jul 24, 12:35 UTCJul 25, 02:55 UTC14h 20m
2026-07-24 CHH7940 BKK → HAK Jul 24, 04:30 UTCJul 24, 10:50 UTC6h 20m
2026-07-23 CHH7939 HAK → BKK Jul 23, 13:05 UTCJul 24, 02:50 UTC13h 45m
2026-07-23 CHH721 HAK → BKK Jul 23, 04:30 UTCJul 23, 11:00 UTC6h 30m
2026-07-23 CHH7939 HAK → BKK Jul 23, 02:15 UTCJul 23, 03:00 UTC45m
2026-07-22 CHH722 - Jul 22, 12:40 UTCJul 22, 14:10 UTC1h 30m
2026-07-22 CHH721 - Jul 22, 11:10 UTCJul 22, 11:20 UTC10m
2026-07-22 CHH7940 BKK → HAK Jul 22, 04:30 UTCJul 22, 05:05 UTC35m
2026-07-21 CHH7939 HAK → BKK Jul 21, 12:35 UTCJul 22, 02:55 UTC14h 20m
2026-07-21 CHH7940 - Jul 21, 04:25 UTCJul 21, 10:55 UTC6h 30m
2026-07-20 CHH722 - Jul 20, 12:25 UTCJul 21, 02:50 UTC14h 25m
2026-07-20 CHH721 - Jul 20, 10:45 UTCJul 20, 11:15 UTC30m
2026-07-20 CHH7940 - Jul 20, 04:20 UTCJul 20, 04:30 UTC10m
2026-07-20 CHH7939 HAK → BKK Jul 20, 02:35 UTCJul 20, 02:45 UTC10m
2026-07-19 CHH722 - Jul 19, 12:30 UTCJul 19, 12:40 UTC10m
2026-07-19 CHH721 - Jul 19, 10:55 UTCJul 19, 11:10 UTC15m
2026-07-19 CHH7939 - Jul 19, 02:10 UTCJul 19, 02:25 UTC15m
2026-07-18 CHH7056 HGH → HAK Jul 18, 10:15 UTCJul 18, 14:45 UTC4h 30m
2026-07-18 CHH7940 - Jul 18, 04:10 UTCJul 18, 04:25 UTC15m
2026-07-18 CHH7939 - Jul 18, 02:29 UTCJul 18, 02:45 UTC15m
2026-07-17 CHH722 - Jul 17, 13:55 UTCJul 17, 14:15 UTC20m
2026-07-17 CHH721 - Jul 17, 04:20 UTCJul 17, 12:35 UTC8h 15m
2026-07-16 CHH7939 - Jul 16, 15:40 UTCJul 17, 02:39 UTC11h 0m
2026-07-15 CHH7002 - Jul 15, 23:00 UTCJul 15, 23:15 UTC15m
2026-07-15 CHH7807 - Jul 15, 04:50 UTCJul 15, 05:10 UTC20m
2026-07-14 CHH7205 - Jul 14, 11:00 UTCJul 14, 11:10 UTC10m
2026-07-14 CHH7284 - Jul 14, 09:00 UTCJul 14, 09:10 UTC10m
2026-07-13 CHH722 - Jul 13, 12:30 UTCJul 13, 12:45 UTC15m
2026-07-13 CHH721 - Jul 13, 10:30 UTCJul 13, 10:45 UTC15m
2026-07-13 CHHH7940 - Jul 13, 04:15 UTCJul 13, 04:30 UTC15m
2026-07-13 CHH7939 - Jul 13, 02:20 UTCJul 13, 02:40 UTC20m
2026-07-12 CHH7370 - Jul 12, 00:45 UTCJul 12, 04:01 UTC3h 15m
2026-07-11 CHH722 - Jul 11, 13:15 UTCJul 11, 13:30 UTC15m
2026-07-11 CHH721 - Jul 11, 10:50 UTCJul 11, 12:05 UTC1h 15m
2026-07-11 CHH7940 - Jul 11, 04:15 UTCJul 11, 04:35 UTC20m
2026-07-10 CHH7939 - Jul 10, 12:35 UTCJul 11, 02:55 UTC14h 20m
2026-07-10 CHH721 - Jul 10, 04:25 UTCJul 10, 10:50 UTC6h 25m
2026-07-09 CHH7939 - Jul 9, 13:15 UTCJul 10, 03:10 UTC13h 55m
2026-07-09 CHH7940 - Jul 9, 04:15 UTCJul 9, 04:45 UTC30m
2026-07-09 CHH7939 - Jul 9, 02:15 UTCJul 9, 02:50 UTC35m
2026-07-07 CHH7056 - Jul 7, 13:30 UTCJul 8, 06:50 UTC17h 20m
2026-07-07 CHH7055 - Jul 7, 08:35 UTCJul 8, 06:50 UTC22h 15m
2026-07-07 CHH7055 - Jul 7, 04:10 UTCJul 7, 13:50 UTC9h 40m
2026-07-06 CHH7939 - Jul 6, 15:20 UTCJul 7, 02:50 UTC11h 30m
2026-07-05 CHH7370 - Jul 5, 00:25 UTCJul 5, 10:40 UTC10h 15m
2026-07-04 CHH722 - Jul 4, 12:25 UTCJul 5, 10:40 UTC22h 15m

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-32QS page for operator, model, and routing details .

Mode-S 7823B7 frequently asked

What is Mode-S code 7823B7?
7823B7 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32QS.
Where is Mode-S 7823B7 registered?
Mode-S code 7823B7 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7823B7 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 13:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7823B7, octal 36021667, decimal 7,873,463.
What flights does 7823B7 operate?
Mode-S 7823B7 has broadcast 20 distinct callsigns, including CHH7939, CHH721, CHH722, CHH7940, CHH7304.