sensors Mode-S transponder

780DD2

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1799 · BOEING 737-800

Hex
780DD2
Octal
36006722
Decimal
7,867,858
Country
CN
Tail
B-1799
Type
B738
No current signal · last broadcast 1d ago
Flights observed
56
Distinct callsigns
20
Country
CN
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 780DD2.

Country allocation

The ICAO 24-bit address 780DD2 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
CHH7322 Hainan Airlines 6 2026-04-30
CHH720 Hainan Airlines 3 2026-05-08
CHH719 Hainan Airlines 3 2026-05-08
CHH706 Hainan Airlines 3 2026-05-08
CHH705 Hainan Airlines 3 2026-05-08
CHH7726 Hainan Airlines 2 2026-05-01
CHH7688 Hainan Airlines 2 2026-04-25
CHH7375 Hainan Airlines 2 2026-04-23
CHH7320 Hainan Airlines 2 2026-05-18
CHH7157 Hainan Airlines 2 2026-04-22
CHH7813 Hainan Airlines 1 2026-05-28
CHH7811 Hainan Airlines 1 2026-05-26
CHH7752 Hainan Airlines 1 2026-04-19
CHH7748 - 1 2026-04-19
CHH7747 Hainan Airlines 1 2026-04-19
CHH7738 Hainan Airlines 1 2026-05-05
CHH7737 Hainan Airlines 1 2026-05-04
CHH7734 - 1 2026-04-18
CHH7733 - 1 2026-04-18
CHH7731 Hainan Airlines 1 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-28 CHH7813 PEK → CAN May 28, 12:00 UTCMay 28, 12:20 UTC20m
2026-05-26 CHH7811 PEK → CAN May 26, 08:54 UTCMay 26, 09:15 UTC20m
2026-05-25 CHH7185 PEK → YIH May 25, 23:00 UTCMay 25, 23:19 UTC20m
2026-05-25 CHH7246 URC → PEK May 25, 15:00 UTCMay 25, 15:15 UTC15m
2026-05-20 CHH7370 - May 20, 03:50 UTCMay 20, 06:50 UTC3h 1m
2026-05-18 CHH7320 PVG → HAK May 18, 13:40 UTCMay 19, 02:40 UTC12h 59m
2026-05-18 CHH7215 HAK → NKG May 18, 04:20 UTCMay 18, 09:25 UTC5h 5m
2026-05-11 CHH7468 ZUH → HGH May 11, 08:00 UTCMay 11, 08:15 UTC15m
2026-05-09 CHH7044 TNA → HAK May 9, 02:00 UTCMay 9, 11:55 UTC9h 55m
2026-05-08 CHH720 HKG → HAK May 8, 08:29 UTCMay 8, 08:44 UTC15m
2026-05-08 CHH719 HAK → HKG May 8, 06:20 UTCMay 8, 06:39 UTC20m
2026-05-08 CHH706 HKG → HAK May 8, 02:24 UTCMay 8, 02:39 UTC15m
2026-05-08 CHH705 HAK → HKG May 8, 00:29 UTCMay 8, 00:34 UTC5m
2026-05-07 CHH720 HKG → HAK May 7, 08:20 UTCMay 7, 08:30 UTC10m
2026-05-07 CHH719 HAK → HKG May 7, 06:05 UTCMay 7, 06:15 UTC10m
2026-05-07 CHH706 HKG → HAK May 7, 02:25 UTCMay 7, 02:40 UTC15m
2026-05-07 CHH705 HAK → HKG May 7, 00:10 UTCMay 7, 00:15 UTC5m
2026-05-06 CHH720 HKG → HAK May 6, 08:10 UTCMay 6, 08:20 UTC10m
2026-05-06 CHH719 HAK → HKG May 6, 06:20 UTCMay 6, 06:25 UTC5m
2026-05-06 CHH706 HKG → HAK May 6, 02:40 UTCMay 6, 02:50 UTC10m
2026-05-06 CHH705 HAK → HKG May 6, 00:20 UTCMay 6, 00:25 UTC5m
2026-05-05 CHH7026 SZX → HAK May 5, 12:45 UTCMay 5, 13:00 UTC15m
2026-05-05 CHH7738 NNY → SZX May 5, 03:30 UTCMay 5, 03:40 UTC10m
2026-05-04 CHH7737 SZX → NNY May 4, 22:45 UTCMay 4, 22:55 UTC10m
2026-05-04 CHH7027 HAK → SZX May 4, 14:15 UTCMay 4, 14:25 UTC10m
2026-05-03 CHH7282 PEK → HAK May 3, 13:10 UTCMay 3, 13:30 UTC20m
2026-05-02 CHH7016 SZX → HAK May 2, 08:30 UTCMay 2, 08:55 UTC25m
2026-05-01 CHH7726 PVG → SZX May 1, 01:20 UTCMay 1, 01:35 UTC15m
2026-04-30 CHH7726 PVG → SZX Apr 30, 04:35 UTCMay 1, 00:10 UTC19h 35m
2026-04-30 CHH7322 PVG → SYX Apr 30, 01:05 UTCMay 1, 00:10 UTC23h 5m
2026-04-29 CHH7322 PVG → SYX Apr 29, 23:55 UTCApr 30, 04:40 UTC4h 45m
2026-04-29 CHH7322 PVG → SYX Apr 29, 04:34 UTCApr 30, 01:15 UTC20h 40m
2026-04-29 CHH7322 PVG → SYX Apr 29, 04:29 UTCApr 30, 01:15 UTC20h 45m
2026-04-29 CHH7322 PVG → SYX Apr 29, 00:54 UTCApr 30, 00:30 UTC23h 35m
2026-04-28 CHH7322 PVG → SYX Apr 28, 23:50 UTCApr 29, 04:44 UTC4h 55m
2026-04-26 CHH7337 PEK → XIY Apr 26, 14:25 UTCApr 26, 14:45 UTC20m
2026-04-26 CHH7338 XIY → PEK Apr 26, 12:00 UTCApr 26, 12:15 UTC15m
2026-04-25 CHH7688 NGB → HAK Apr 25, 09:55 UTCApr 26, 02:35 UTC16h 40m
2026-04-24 CHH7688 NGB → HAK Apr 24, 23:35 UTCApr 25, 10:20 UTC10h 45m
2026-04-24 CHH768 - Apr 24, 14:15 UTCApr 24, 14:25 UTC10m
2026-04-23 CHH7028 SZX → HAK Apr 23, 16:55 UTCApr 24, 02:30 UTC9h 34m
2026-04-23 CHH7375 SZX → TFU Apr 23, 08:45 UTCApr 23, 08:55 UTC10m
2026-04-22 CHH7157 SZX → CKG Apr 22, 23:10 UTCApr 22, 23:20 UTC10m
2026-04-22 CHH7275 SZX → TFU Apr 22, 06:30 UTCApr 22, 06:40 UTC10m
2026-04-21 CHH7157 SZX → CKG Apr 21, 23:35 UTCApr 21, 23:50 UTC15m
2026-04-21 CHH7376 TFU → SZX Apr 21, 10:25 UTCApr 21, 10:35 UTC10m
2026-04-21 CHH7375 SZX → TFU Apr 21, 05:05 UTCApr 21, 05:15 UTC10m
2026-04-19 CHH7731 SYX → SZX Apr 19, 23:35 UTCApr 19, 23:45 UTC10m
2026-04-19 CHH7748 - Apr 19, 15:55 UTCApr 19, 16:05 UTC10m
2026-04-19 CHH7747 SZX → TYN Apr 19, 09:25 UTCApr 19, 09:35 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-1799 page for operator, model, and routing details .

Mode-S 780DD2 frequently asked

What is Mode-S code 780DD2?
780DD2 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1799.
Where is Mode-S 780DD2 registered?
Mode-S code 780DD2 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 780DD2 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 780DD2, octal 36006722, decimal 7,867,858.
What flights does 780DD2 operate?
Mode-S 780DD2 has broadcast 20 distinct callsigns, including CHH7322, CHH720, CHH719, CHH706, CHH705.