Apparatus

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sensors Mode-S transponder

781059

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1538 · BOEING 737-800

Hex
781059
Octal
36010131
Decimal
7,868,505
Country
CN
Tail
B-1538
Type
B738
Broadcasting now · callsign CHH7528 · 36,100 ft
Flights observed
96
Distinct callsigns
20
Country
CN
Last broadcast
4h ago

Current position

781059 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 781059 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
CHH7726 - 3 2026-06-22
CHH7725 - 3 2026-06-22
CHH7216 - 3 2026-06-19
CHH7074 Hainan Airlines 3 2026-04-25
CHH7811 Hainan Airlines 2 2026-06-09
CHH7807 Hainan Airlines 2 2026-06-07
CHH7805 - 2 2026-07-13
CHH7751 Hainan Airlines 2 2026-07-02
CHH7741 - 2 2026-06-18
CHH7488 - 2 2026-07-06
CHH7319 Hainan Airlines 2 2026-05-07
CHH720 Hainan Airlines 2 2026-05-17
CHH719 Hainan Airlines 2 2026-05-17
CHH7164 - 2 2026-06-28
CHH7119 - 2 2026-06-21
CHH7067 Hainan Airlines 2 2026-05-04
CHH7054 - 2 2026-06-30
CHH7872 Hainan Airlines 1 2026-04-21
CHH7815 - 1 2026-07-08
CHH780 Hainan Airlines 1 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CHH7527 - Jul 14, 05:35 UTCJul 14, 05:50 UTC15m
2026-07-13 CHH7805 - Jul 13, 02:40 UTCJul 13, 03:05 UTC25m
2026-07-11 CHH7644 - Jul 11, 08:15 UTCJul 11, 08:30 UTC15m
2026-07-10 CHH7105 - Jul 10, 23:05 UTCJul 10, 23:15 UTC10m
2026-07-10 CHH7581 HAK → PEK Jul 10, 17:00 UTCJul 10, 17:10 UTC10m
2026-07-10 CHH7582 - Jul 10, 08:35 UTCJul 10, 08:55 UTC20m
2026-07-09 CHH7613 - Jul 9, 23:50 UTCJul 10, 00:05 UTC15m
2026-07-08 CHH7815 - Jul 8, 13:10 UTCJul 8, 13:25 UTC15m
2026-07-08 CHH7236 - Jul 8, 09:45 UTCJul 8, 09:55 UTC10m
2026-07-08 CHH7235 - Jul 8, 03:10 UTCJul 8, 03:30 UTC20m
2026-07-07 CHH7016 - Jul 7, 08:40 UTCJul 7, 11:50 UTC3h 10m
2026-07-06 CHH7488 - Jul 6, 14:45 UTCJul 7, 11:50 UTC21h 5m
2026-07-06 CHH7488 - Jul 6, 04:20 UTCJul 6, 15:30 UTC11h 10m
2026-07-05 CHH7177 PEK → HGH Jul 5, 16:10 UTCJul 5, 16:20 UTC10m
2026-07-05 CHH7477 - Jul 5, 07:40 UTCJul 5, 07:50 UTC10m
2026-07-04 CHH7312 - Jul 4, 12:05 UTCJul 4, 12:15 UTC10m
2026-07-03 CHH7279 - Jul 3, 05:15 UTCJul 3, 05:25 UTC10m
2026-07-03 CHH7702 - Jul 3, 00:55 UTCJul 3, 01:05 UTC10m
2026-07-02 CHH7772 - Jul 2, 15:10 UTCJul 2, 15:35 UTC25m
2026-07-02 CHH7771 - Jul 2, 08:15 UTCJul 2, 08:35 UTC20m
2026-07-02 CHH7751 SZX → CTU Jul 2, 00:50 UTCJul 2, 01:00 UTC10m
2026-07-01 CHH7748 TYN → SZX Jul 1, 17:10 UTCJul 1, 17:30 UTC20m
2026-07-01 CHH7747 - Jul 1, 10:40 UTCJul 1, 10:50 UTC10m
2026-07-01 CHH7156 - Jul 1, 08:00 UTCJul 1, 08:20 UTC20m
2026-07-01 CHH7398 - Jul 1, 00:30 UTCJul 1, 00:50 UTC20m
2026-06-30 CHH7054 - Jun 30, 04:05 UTCJun 30, 06:50 UTC2h 45m
2026-06-29 CHH7805 - Jun 29, 02:45 UTCJun 29, 02:59 UTC15m
2026-06-28 CHH7164 - Jun 28, 00:04 UTCJun 28, 09:34 UTC9h 30m
2026-06-25 CHH7577 - Jun 25, 22:59 UTCJun 25, 23:14 UTC15m
2026-06-25 CHH7291 - Jun 25, 00:09 UTCJun 25, 08:34 UTC8h 25m
2026-06-24 CHH7238 - Jun 24, 07:34 UTCJun 24, 07:59 UTC25m
2026-06-24 CHH7237 - Jun 24, 03:15 UTCJun 24, 03:29 UTC15m
2026-06-22 CHH7725 - Jun 22, 06:05 UTCJun 22, 06:15 UTC10m
2026-06-22 CHH7726 - Jun 22, 01:49 UTCJun 22, 02:10 UTC20m
2026-06-21 CHH7119 - Jun 21, 05:04 UTCJun 21, 05:15 UTC10m
2026-06-20 CHH7028 - Jun 20, 15:19 UTCJun 20, 15:34 UTC15m
2026-06-20 CHH7025 - Jun 20, 09:19 UTCJun 20, 09:44 UTC25m
2026-06-19 CHH7216 - Jun 19, 02:50 UTCJun 19, 10:35 UTC7h 45m
2026-06-18 CHH7741 - Jun 18, 04:40 UTCJun 18, 04:50 UTC10m
2026-06-18 CHH7726 - Jun 18, 01:25 UTCJun 18, 01:35 UTC10m
2026-06-12 CHH7119 HAK → PVG Jun 12, 05:00 UTCJun 12, 10:30 UTC5h 30m
2026-06-11 CHH7386 HGH → SYX Jun 11, 05:15 UTCJun 11, 10:10 UTC4h 55m
2026-06-09 CHH7811 PEK → CAN Jun 9, 09:35 UTCJun 9, 09:55 UTC20m
2026-06-08 CHH7607 PEK → SHA Jun 8, 09:05 UTCJun 8, 09:15 UTC10m
2026-06-07 CHH7807 PEK → CAN Jun 7, 04:50 UTCJun 7, 05:10 UTC20m
2026-06-05 CHH7468 ZUH → HGH Jun 5, 09:20 UTCJun 5, 09:50 UTC30m
2026-06-05 CHH7467 HGH → ZUH Jun 5, 07:00 UTCJun 5, 07:15 UTC15m
2026-05-30 CHH7015 HAK → SZX May 30, 11:30 UTCMay 30, 12:00 UTC30m
2026-05-30 CHH7420 LNL → HAK May 30, 08:30 UTCMay 30, 08:40 UTC10m
2026-05-29 CHH7419 LNL → LHW May 29, 23:15 UTCMay 29, 23:25 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-1538 page for operator, model, and routing details .

Mode-S 781059 frequently asked

What is Mode-S code 781059?
781059 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1538.
Where is Mode-S 781059 registered?
Mode-S code 781059 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781059 broadcasting right now?
Yes. Mode-S 781059 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781059, octal 36010131, decimal 7,868,505.
What flights does 781059 operate?
Mode-S 781059 has broadcast 20 distinct callsigns, including CHH7726, CHH7725, CHH7216, CHH7074, CHH7811.