Apparatus

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sensors Mode-S transponder

781579

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-303Z · AIRBUS A-330-300

Hex
781579
Octal
36012571
Decimal
7,869,817
Country
CN
Tail
B-303Z
Type
A333
No current signal · last broadcast 5h ago
Flights observed
94
Distinct callsigns
20
Country
CN
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 781579.

Country allocation

The ICAO 24-bit address 781579 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
CHH754 Hainan Airlines 8 2026-06-02
CHH7985 Hainan Airlines 6 2026-05-20
CHH752 Hainan Airlines 6 2026-05-31
CHH751 Hainan Airlines 6 2026-05-30
CHH7986 Hainan Airlines 5 2026-05-20
CHH7965 Hainan Airlines 5 2026-05-13
CHH753 Hainan Airlines 5 2026-06-01
CHH7938 Hainan Airlines 4 2026-05-06
CHH769 Hainan Airlines 4 2026-04-18
CHH7605 Hainan Airlines 4 2026-04-29
CHH408 Hainan Airlines 4 2026-05-18
CHH7966 Hainan Airlines 3 2026-05-14
CHH7603 Hainan Airlines 3 2026-05-27
CHH407 Hainan Airlines 3 2026-05-17
CHH7937 Hainan Airlines 2 2026-05-05
CHH7801 Hainan Airlines 2 2026-05-29
CHH766 Hainan Airlines 2 2026-04-15
CHH7608 Hainan Airlines 2 2026-05-08
CHH7606 Hainan Airlines 2 2026-05-08
CHH7601 Hainan Airlines 2 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 CHH754 MAN → PEK Jun 2, 11:30 UTCJun 2, 20:45 UTC9h 15m
2026-06-01 CHH753 PEK → MAN Jun 1, 22:55 UTCJun 2, 05:45 UTC6h 50m
2026-05-31 CHH752 DUB → PEK May 31, 11:20 UTCMay 31, 18:10 UTC6h 50m
2026-05-30 CHH751 PEK → DUB May 30, 19:05 UTCMay 31, 01:11 UTC6h 6m
2026-05-30 CHH7180 SYX → PEK May 30, 10:40 UTCMay 30, 10:50 UTC10m
2026-05-30 CHH7180 SYX → PEK May 30, 07:35 UTCMay 30, 08:05 UTC30m
2026-05-30 CHH7179 PEK → SYX May 30, 04:20 UTCMay 30, 04:35 UTC15m
2026-05-29 CHH7801 PEK → CAN May 29, 01:05 UTCMay 29, 01:30 UTC25m
2026-05-28 CHH752 DUB → PEK May 28, 21:00 UTCMay 28, 21:20 UTC20m
2026-05-28 CHH752 DUB → PEK May 28, 11:20 UTCMay 28, 18:30 UTC7h 10m
2026-05-27 CHH751 PEK → DUB May 27, 21:10 UTCMay 28, 03:05 UTC5h 55m
2026-05-27 CHH7607 PEK → SHA May 27, 09:25 UTCMay 27, 09:40 UTC15m
2026-05-27 CHH7603 PEK → SHA May 27, 00:59 UTCMay 27, 01:14 UTC15m
2026-05-26 CHH752 DUB → PEK May 26, 20:34 UTCMay 26, 20:54 UTC20m
2026-05-26 CHH752 DUB → PEK May 26, 11:30 UTCMay 26, 18:05 UTC6h 35m
2026-05-25 CHH751 PEK → DUB May 25, 22:19 UTCMay 26, 05:45 UTC7h 25m
2026-05-25 CHH751 PEK → DUB May 25, 19:00 UTCMay 25, 19:15 UTC15m
2026-05-24 CHH754 MAN → PEK May 24, 11:30 UTCMay 24, 17:50 UTC6h 20m
2026-05-23 CHH753 PEK → MAN May 23, 22:55 UTCMay 24, 06:00 UTC7h 5m
2026-05-21 CHH7601 PEK → SHA May 21, 23:55 UTCMay 22, 00:10 UTC15m
2026-05-20 CHH7986 SVO → PEK May 20, 17:20 UTCMay 20, 17:45 UTC25m
2026-05-20 CHH7985 PEK → SVO May 20, 07:00 UTCMay 20, 13:35 UTC6h 35m
2026-05-20 CHH7986 SVO → PEK May 20, 00:00 UTCMay 20, 00:25 UTC25m
2026-05-19 CHH7986 SVO → PEK May 19, 09:50 UTCMay 19, 21:25 UTC11h 35m
2026-05-19 CHH7985 PEK → SVO May 19, 06:35 UTCMay 19, 06:45 UTC10m
2026-05-18 CHH408 EDI → PEK May 18, 20:15 UTCMay 18, 20:25 UTC10m
2026-05-18 CHH408 EDI → PEK May 18, 11:15 UTCMay 18, 17:35 UTC6h 20m
2026-05-17 CHH407 PEK → EDI May 17, 19:30 UTCMay 18, 05:35 UTC10h 5m
2026-05-14 CHH7966 LED → PEK May 14, 10:31 UTCMay 14, 21:30 UTC11h 0m
2026-05-13 CHH7966 LED → PEK May 13, 20:45 UTCMay 14, 17:40 UTC20h 55m
2026-05-13 CHH7966 LED → PEK May 13, 14:20 UTCMay 14, 11:05 UTC20h 45m
2026-05-13 CHH7965 PEK → LED May 13, 13:31 UTCMay 14, 11:05 UTC21h 35m
2026-05-13 CHH7965 PEK → LED May 13, 09:10 UTCMay 13, 21:35 UTC12h 25m
2026-05-12 CHH7965 PEK → LED May 12, 20:55 UTCMay 13, 14:25 UTC17h 30m
2026-05-12 CHH7965 PEK → LED May 12, 18:55 UTCMay 13, 14:25 UTC19h 30m
2026-05-12 CHH7965 PEK → LED May 12, 17:40 UTCMay 13, 14:25 UTC20h 45m
2026-05-12 CHH7985 PEK → SVO May 12, 10:15 UTCMay 12, 14:25 UTC4h 10m
2026-05-10 CHH752 DUB → PEK May 10, 11:15 UTCMay 10, 17:49 UTC6h 35m
2026-05-09 CHH751 PEK → DUB May 9, 21:05 UTCMay 9, 21:19 UTC15m
2026-05-09 CHH751 PEK → DUB May 9, 19:10 UTCMay 9, 19:25 UTC15m
2026-05-09 CHH7347 PEK → TFU May 9, 06:50 UTCMay 9, 07:15 UTC25m
2026-05-08 CHH7577 PEK → HGH May 8, 23:25 UTCMay 8, 23:35 UTC10m
2026-05-08 CHH7608 SHA → PEK May 8, 13:00 UTCMay 8, 13:10 UTC10m
2026-05-08 CHH7606 SHA → PEK May 8, 05:54 UTCMay 8, 06:04 UTC10m
2026-05-07 CHH7279 PEK → SYX May 7, 05:15 UTCMay 7, 05:30 UTC15m
2026-05-06 CHH7938 LAX → PEK May 6, 20:15 UTCMay 6, 20:30 UTC15m
2026-05-06 CHH7938 LAX → PEK May 6, 12:10 UTCMay 6, 17:50 UTC5h 39m
2026-05-05 CHH7937 PEK → PRG May 5, 19:10 UTCMay 6, 02:10 UTC7h 0m
2026-05-05 CHH7447 PEK → TFU May 5, 08:20 UTCMay 5, 08:35 UTC15m
2026-05-05 CHH7606 SHA → PEK May 5, 06:00 UTCMay 5, 06:10 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-303Z page for operator, model, and routing details .

Mode-S 781579 frequently asked

What is Mode-S code 781579?
781579 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-303Z.
Where is Mode-S 781579 registered?
Mode-S code 781579 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781579 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781579, octal 36012571, decimal 7,869,817.
What flights does 781579 operate?
Mode-S 781579 has broadcast 20 distinct callsigns, including CHH754, CHH7985, CHH752, CHH751, CHH7986.