Apparatus

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sensors Mode-S transponder

780656

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-5521 · BOEING 737-800

Hex
780656
Octal
36003126
Decimal
7,865,942
Country
CN
Tail
B-5521
Type
B738
No current signal · last broadcast Jul 26, 03:00 UTC
Flights observed
121
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 03:00 UTC

Last known position

Most recent position reported by Mode-S 780656.

Country allocation

The ICAO 24-bit address 780656 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
CHH7297 - 3 2026-07-07
CHH7082 Hainan Airlines 3 2026-07-17
CHH7889 - 2 2026-07-04
CHH7883 - 2 2026-06-07
CHH7741 Hainan Airlines 2 2026-05-30
CHH7731 Hainan Airlines 2 2026-07-21
CHH7722 Hainan Airlines 2 2026-05-29
CHH7721 Hainan Airlines 2 2026-05-29
CHH7709 Hainan Airlines 2 2026-06-10
CHH7650 - 2 2026-07-02
CHH7557 Hainan Airlines 2 2026-06-12
CHH748 - 2 2026-06-29
CHH747 - 2 2026-06-29
CHH7275 - 2 2026-07-23
CHH7271 Hainan Airlines 2 2026-06-15
CHH7256 Hainan Airlines 2 2026-05-29
CHH7255 Hainan Airlines 2 2026-05-29
CHH720 Hainan Airlines 2 2026-05-12
CHH719 Hainan Airlines 2 2026-05-12
CHH7189 Hainan Airlines 2 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CHH7663 SYX → WUH Jul 26, 01:00 UTCJul 26, 03:00 UTC2h 0m
2026-07-24 CHH7535 PEK → CSX Jul 24, 15:15 UTCJul 24, 15:55 UTC40m
2026-07-24 CHH7163 - Jul 24, 08:25 UTCJul 24, 09:00 UTC35m
2026-07-23 CHH7028 SZX → HAK Jul 23, 15:50 UTCJul 23, 16:00 UTC10m
2026-07-23 CHH7275 - Jul 23, 07:55 UTCJul 23, 08:05 UTC10m
2026-07-22 CHH7870 SZX → XIY Jul 22, 23:50 UTCJul 23, 00:00 UTC10m
2026-07-22 CHH7774 KWE → SZX Jul 22, 16:25 UTCJul 22, 16:35 UTC10m
2026-07-22 CHH7773 SZX → KWE Jul 22, 12:35 UTCJul 22, 12:45 UTC10m
2026-07-21 CHH7731 SYX → SZX Jul 21, 23:45 UTCJul 21, 23:55 UTC10m
2026-07-21 CHH7873 XIY → SZX Jul 21, 16:25 UTCJul 21, 16:35 UTC10m
2026-07-21 CHH7874 - Jul 21, 09:10 UTCJul 21, 09:20 UTC10m
2026-07-21 CHH7394 HGH → SZX Jul 21, 06:15 UTCJul 21, 06:40 UTC25m
2026-07-21 CHH7393 SZX → HGH Jul 21, 00:10 UTCJul 21, 00:20 UTC10m
2026-07-20 CHH7776 TYN → SZX Jul 20, 17:05 UTCJul 20, 17:25 UTC20m
2026-07-20 CHH7638 - Jul 20, 05:50 UTCJul 20, 06:05 UTC15m
2026-07-19 CHH7187 PEK → WUH Jul 19, 00:45 UTCJul 19, 01:05 UTC20m
2026-07-18 CHH7582 - Jul 18, 09:00 UTCJul 18, 09:15 UTC15m
2026-07-17 CHH7082 PEK → HAK Jul 17, 11:30 UTCJul 17, 11:45 UTC15m
2026-07-17 CHH6384 - Jul 17, 07:25 UTCJul 17, 07:50 UTC25m
2026-07-14 CHH7187 - Jul 14, 01:10 UTCJul 14, 01:30 UTC20m
2026-07-13 CHH7125 - Jul 13, 12:10 UTCJul 13, 12:20 UTC10m
2026-07-13 CHH6211 - Jul 13, 04:10 UTCJul 13, 04:25 UTC15m
2026-07-12 CHH7053 - Jul 12, 05:55 UTCJul 12, 06:35 UTC40m
2026-07-11 CHH7053 - Jul 11, 09:50 UTCJul 12, 06:35 UTC20h 45m
2026-07-09 CHH7468 - Jul 9, 11:20 UTCJul 9, 11:35 UTC15m
2026-07-07 CHH7297 - Jul 7, 13:20 UTCJul 8, 06:45 UTC17h 25m
2026-07-05 CHH7377 PEK → HGH Jul 5, 16:25 UTCJul 5, 16:35 UTC10m
2026-07-05 CHH7179 - Jul 5, 01:45 UTCJul 5, 02:05 UTC20m
2026-07-04 CHH7889 - Jul 4, 00:30 UTCJul 4, 00:45 UTC15m
2026-07-02 CHH7613 PEK → PVG Jul 2, 23:50 UTCJul 3, 00:00 UTC10m
2026-07-02 CHH7650 - Jul 2, 11:00 UTCJul 2, 11:25 UTC25m
2026-07-02 CHH7650 - Jul 2, 06:20 UTCJul 2, 06:41 UTC21m
2026-07-01 CHH7649 - Jul 1, 23:50 UTCJul 2, 00:00 UTC10m
2026-06-30 CHH7068 - Jun 30, 06:50 UTCJun 30, 07:00 UTC10m
2026-06-30 CHH7068 - Jun 30, 02:35 UTCJun 30, 02:45 UTC10m
2026-06-29 CHH748 - Jun 29, 04:04 UTCJun 29, 14:19 UTC10h 15m
2026-06-29 CHH747 - Jun 29, 02:20 UTCJun 29, 02:39 UTC20m
2026-06-28 CHH7654 - Jun 28, 15:14 UTCJun 28, 15:34 UTC20m
2026-06-28 CHH7653 - Jun 28, 12:15 UTCJun 28, 12:29 UTC15m
2026-06-28 CHH7086 - Jun 28, 02:39 UTCJun 28, 09:34 UTC6h 55m
2026-06-27 CHH7086 - Jun 27, 12:34 UTCJun 28, 09:34 UTC21h 0m
2026-06-27 CHH7088 - Jun 27, 02:29 UTCJun 27, 09:50 UTC7h 20m
2026-06-26 CHH7319 - Jun 26, 12:44 UTCJun 27, 09:50 UTC21h 5m
2026-06-26 CHH7688 - Jun 26, 09:59 UTCJun 27, 05:19 UTC19h 20m
2026-06-25 CHH7687 - Jun 25, 23:30 UTCJun 26, 12:55 UTC13h 25m
2026-06-25 CHH780 HKG → HAK Jun 25, 13:05 UTCJun 25, 13:14 UTC10m
2026-06-25 CHH779 - Jun 25, 11:15 UTCJun 25, 11:30 UTC15m
2026-06-25 CHH748 - Jun 25, 04:14 UTCJun 25, 04:40 UTC25m
2026-06-25 CHH747 - Jun 25, 02:14 UTCJun 25, 02:25 UTC10m
2026-06-24 CHH7082 - Jun 24, 11:20 UTCJun 24, 11:39 UTC20m

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-5521 page for operator, model, and routing details .

Mode-S 780656 frequently asked

What is Mode-S code 780656?
780656 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-5521.
Where is Mode-S 780656 registered?
Mode-S code 780656 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 780656 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 03:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 780656, octal 36003126, decimal 7,865,942.
What flights does 780656 operate?
Mode-S 780656 has broadcast 20 distinct callsigns, including CHH7297, CHH7082, CHH7889, CHH7883, CHH7741.