Apparatus

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sensors Mode-S transponder

780DD6

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1505 · BOEING 737-800

Hex
780DD6
Octal
36006726
Decimal
7,867,862
Country
CN
Tail
B-1505
Type
B738
No current signal · last broadcast 20h ago
Flights observed
116
Distinct callsigns
20
Country
CN
Last broadcast
20h ago

Last known position

Most recent position reported by Mode-S 780DD6.

Country allocation

The ICAO 24-bit address 780DD6 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
CHH7374 Hainan Airlines 26 2026-07-16
CHH7312 - 14 2026-06-18
CHH7373 Hainan Airlines 11 2026-07-21
CHH7744 - 7 2026-07-10
CHH7750 - 6 2026-07-10
CHH6034 - 6 2026-07-20
CHH6033 - 5 2026-07-20
CHH7749 - 4 2026-06-24
CHH7698 - 4 2026-07-20
CHH7562 Hainan Airlines 4 2026-06-28
CHH7326 Hainan Airlines 4 2026-06-13
CHH7311 Hainan Airlines 4 2026-06-04
CHH7697 Hainan Airlines 3 2026-07-19
CHH7308 Hainan Airlines 3 2026-05-07
CHH7743 Hainan Airlines 2 2026-06-24
CHH7668 Hainan Airlines 2 2026-05-07
CHH7304 Hainan Airlines 2 2026-06-03
CHH7561 - 1 2026-06-27
CHH7388 - 1 2026-06-02
CHH7370 - 1 2026-04-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 CHH7373 SYX → HFE Jul 21, 02:30 UTCJul 21, 14:55 UTC12h 25m
2026-07-20 CHH6034 - Jul 20, 13:30 UTCJul 20, 13:40 UTC10m
2026-07-20 CHH6033 - Jul 20, 10:05 UTCJul 20, 10:20 UTC15m
2026-07-20 CHH7698 - Jul 20, 05:15 UTCJul 20, 05:25 UTC10m
2026-07-19 CHH7697 SYX → NKG Jul 19, 09:00 UTCJul 20, 05:25 UTC20h 25m
2026-07-18 CHH6034 - Jul 18, 15:35 UTCJul 18, 15:55 UTC20m
2026-07-18 CHH6033 - Jul 18, 12:30 UTCJul 18, 12:40 UTC10m
2026-07-18 CHH7698 - Jul 18, 07:00 UTCJul 18, 07:15 UTC15m
2026-07-17 CHH7698 - Jul 17, 09:35 UTCJul 18, 07:15 UTC21h 41m
2026-07-16 CHH7374 HFE → SYX Jul 16, 13:49 UTCJul 17, 09:50 UTC20h 0m
2026-07-15 CHH7374 HFE → SYX Jul 15, 02:20 UTCJul 15, 14:00 UTC11h 40m
2026-07-14 CHH7374 HFE → SYX Jul 14, 13:55 UTCJul 15, 02:35 UTC12h 39m
2026-07-14 CHH7374 HFE → SYX Jul 14, 02:30 UTCJul 14, 14:05 UTC11h 35m
2026-07-13 CHH7374 HFE → SYX Jul 13, 10:05 UTCJul 14, 02:30 UTC16h 25m
2026-07-13 CHH7373 - Jul 13, 06:15 UTCJul 14, 02:30 UTC20h 15m
2026-07-13 CHH7373 - Jul 13, 02:15 UTCJul 13, 14:05 UTC11h 50m
2026-07-11 CHH7373 - Jul 11, 02:05 UTCJul 11, 14:10 UTC12h 5m
2026-07-10 CHH7750 - Jul 10, 15:20 UTCJul 10, 15:30 UTC10m
2026-07-10 CHH7744 - Jul 10, 04:30 UTCJul 10, 13:30 UTC9h 0m
2026-07-09 CHH7744 - Jul 9, 14:20 UTCJul 10, 13:30 UTC23h 10m
2026-07-09 CHH7209 - Jul 9, 06:35 UTCJul 10, 04:50 UTC22h 15m
2026-07-09 CHH7373 - Jul 9, 02:10 UTCJul 9, 14:30 UTC12h 20m
2026-07-08 CHH7373 - Jul 8, 14:00 UTCJul 9, 06:50 UTC16h 50m
2026-07-07 CHH7374 HFE → SYX Jul 7, 15:35 UTCJul 8, 14:00 UTC22h 25m
2026-07-06 CHH7373 - Jul 6, 02:20 UTCJul 6, 14:40 UTC12h 20m
2026-07-05 CHH7374 HFE → SYX Jul 5, 13:40 UTCJul 6, 02:25 UTC12h 45m
2026-07-02 CHH7374 HFE → SYX Jul 2, 14:05 UTCJul 3, 02:15 UTC12h 10m
2026-07-02 CHH7374 HFE → SYX Jul 2, 01:55 UTCJul 2, 14:20 UTC12h 25m
2026-07-01 CHH7374 HFE → SYX Jul 1, 15:35 UTCJul 2, 14:20 UTC22h 45m
2026-07-01 CHH7374 HFE → SYX Jul 1, 15:20 UTCJul 2, 02:05 UTC10h 45m
2026-07-01 CHH7374 HFE → SYX Jul 1, 02:00 UTCJul 1, 15:40 UTC13h 40m
2026-06-30 CHH6034 - Jun 30, 13:15 UTCJun 30, 13:35 UTC20m
2026-06-30 CHH6033 - Jun 30, 10:05 UTCJun 30, 10:15 UTC10m
2026-06-30 CHH7698 - Jun 30, 04:55 UTCJun 30, 05:15 UTC20m
2026-06-29 CHH7697 - Jun 29, 08:24 UTCJun 30, 05:15 UTC20h 51m
2026-06-28 CHH7697 - Jun 28, 14:30 UTCJun 29, 08:50 UTC18h 20m
2026-06-28 CHH7562 CGO → SYX Jun 28, 07:05 UTCJun 28, 14:39 UTC7h 35m
2026-06-27 CHH7561 - Jun 27, 13:40 UTCJun 28, 07:05 UTC17h 25m
2026-06-27 CHH7373 - Jun 27, 01:54 UTCJun 27, 13:44 UTC11h 50m
2026-06-26 CHH7750 - Jun 26, 17:00 UTCJun 26, 17:09 UTC10m
2026-06-26 CHH7744 - Jun 26, 15:05 UTCJun 26, 15:29 UTC25m
2026-06-25 CHH7744 - Jun 25, 16:29 UTCJun 25, 16:55 UTC25m
2026-06-24 CHH7743 NGB → CGQ Jun 24, 23:29 UTCJun 24, 23:40 UTC10m
2026-06-24 CHH7749 - Jun 24, 17:10 UTCJun 24, 17:29 UTC20m
2026-06-24 CHH7374 HFE → SYX Jun 24, 02:15 UTCJun 24, 13:50 UTC11h 35m
2026-06-23 CHH7374 HFE → SYX Jun 23, 13:59 UTCJun 24, 13:30 UTC23h 30m
2026-06-23 CHH7374 HFE → SYX Jun 23, 02:24 UTCJun 23, 14:35 UTC12h 10m
2026-06-22 CHH7374 HFE → SYX Jun 22, 13:49 UTCJun 23, 02:34 UTC12h 45m
2026-06-22 CHH7374 HFE → SYX Jun 22, 02:14 UTCJun 22, 14:19 UTC12h 5m
2026-06-21 CHH7374 HFE → SYX Jun 21, 13:44 UTCJun 22, 02:14 UTC12h 30m

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-1505 page for operator, model, and routing details .

Mode-S 780DD6 frequently asked

What is Mode-S code 780DD6?
780DD6 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1505.
Where is Mode-S 780DD6 registered?
Mode-S code 780DD6 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 780DD6 broadcasting right now?
No active broadcast right now. Last signal was 20h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 780DD6, octal 36006726, decimal 7,867,862.
What flights does 780DD6 operate?
Mode-S 780DD6 has broadcast 20 distinct callsigns, including CHH7374, CHH7312, CHH7373, CHH7744, CHH7750.