Apparatus

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sensors Mode-S transponder

780EFA

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-7171 · BOEING 737-800

Hex
780EFA
Octal
36007372
Decimal
7,868,154
Country
CN
Tail
B-7171
Type
B738
No current signal · last broadcast Jul 26, 11:20 UTC
Flights observed
99
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 11:20 UTC

Last known position

Most recent position reported by Mode-S 780EFA.

Country allocation

The ICAO 24-bit address 780EFA 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
CHH7506 Hainan Airlines 8 2026-07-26
CHH7741 Hainan Airlines 4 2026-06-07
CHH7505 - 4 2026-07-21
CHH7746 - 3 2026-05-30
CHH7742 Hainan Airlines 3 2026-06-07
CHH7988 Hainan Airlines 2 2026-05-20
CHH7987 Hainan Airlines 2 2026-05-20
CHH7874 - 2 2026-06-30
CHH7731 Hainan Airlines 2 2026-06-02
CHH7722 Hainan Airlines 2 2026-05-31
CHH748 - 2 2026-06-19
CHH747 - 2 2026-06-18
CHH7394 Hainan Airlines 2 2026-06-01
CHH7075 Hainan Airlines 2 2026-05-14
CHH7028 Hainan Airlines 2 2026-05-08
CHH460 Hainan Airlines 2 2026-05-25
CHH459 Hainan Airlines 2 2026-05-25
CHH439 Hainan Airlines 2 2026-05-07
CHH7982 Hainan Airlines 1 2026-06-06
CHH7981 Hainan Airlines 1 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CHH7506 CGO → HRB Jul 26, 11:00 UTCJul 26, 11:20 UTC20m
2026-07-25 CHH7187 PEK → WUH Jul 25, 00:50 UTCJul 25, 01:20 UTC30m
2026-07-24 CHH7506 - Jul 24, 10:50 UTCJul 24, 11:25 UTC35m
2026-07-23 CHH7506 - Jul 23, 11:50 UTCJul 23, 12:05 UTC15m
2026-07-22 CHH7506 - Jul 22, 13:20 UTCJul 23, 12:05 UTC22h 45m
2026-07-21 CHH7506 - Jul 21, 11:05 UTCJul 21, 11:15 UTC10m
2026-07-21 CHH7505 - Jul 21, 01:05 UTCJul 21, 01:15 UTC10m
2026-07-20 CHH7506 - Jul 20, 11:05 UTCJul 20, 11:15 UTC10m
2026-07-20 CHH7505 - Jul 20, 00:55 UTCJul 20, 01:05 UTC10m
2026-07-19 CHH7506 - Jul 19, 11:10 UTCJul 19, 11:20 UTC10m
2026-07-19 CHH7505 - Jul 19, 00:50 UTCJul 19, 01:00 UTC10m
2026-07-18 CHH7129 - Jul 18, 14:20 UTCJul 18, 14:30 UTC10m
2026-07-18 CHH6386 - Jul 18, 08:30 UTCJul 18, 08:45 UTC15m
2026-07-18 CHH6385 - Jul 18, 01:54 UTCJul 18, 02:14 UTC20m
2026-07-14 CHH7805 - Jul 14, 02:50 UTCJul 14, 03:10 UTC20m
2026-06-30 CHH7874 - Jun 30, 09:05 UTCJun 30, 09:15 UTC10m
2026-06-29 CHH7137 - Jun 29, 23:09 UTCJun 29, 23:29 UTC20m
2026-06-29 CHH7807 - Jun 29, 04:50 UTCJun 29, 05:09 UTC20m
2026-06-28 CHH7815 - Jun 28, 12:39 UTCJun 28, 13:00 UTC20m
2026-06-28 CHH7810 - Jun 28, 10:44 UTCJun 28, 10:55 UTC10m
2026-06-25 CHH7308 - Jun 25, 00:44 UTCJun 25, 00:55 UTC10m
2026-06-20 CHH461 HAK → VTE Jun 20, 12:04 UTCJun 20, 15:44 UTC3h 40m
2026-06-20 CHH720 - Jun 20, 08:34 UTCJun 20, 08:49 UTC15m
2026-06-20 CHH719 - Jun 20, 06:19 UTCJun 20, 06:39 UTC20m
2026-06-20 CHH7320 - Jun 20, 02:09 UTCJun 20, 02:24 UTC15m
2026-06-19 CHH748 - Jun 19, 04:10 UTCJun 19, 04:34 UTC25m
2026-06-18 CHH747 - Jun 18, 09:10 UTCJun 19, 02:29 UTC17h 19m
2026-06-17 CHH7029 HAK → KWE Jun 17, 09:40 UTCJun 17, 09:50 UTC10m
2026-06-17 CHH748 - Jun 17, 04:20 UTCJun 17, 04:45 UTC25m
2026-06-17 CHH747 - Jun 17, 02:25 UTCJun 17, 02:35 UTC10m
2026-06-15 CHH7522 - Jun 15, 13:00 UTCJun 15, 13:10 UTC10m
2026-06-11 CHH7265 HAK → XIY Jun 11, 05:20 UTCJun 11, 05:35 UTC15m
2026-06-10 CHH7234 NGB → CAN Jun 10, 06:40 UTCJun 10, 07:00 UTC20m
2026-06-08 CHH7811 PEK → CAN Jun 8, 09:15 UTCJun 8, 09:35 UTC20m
2026-06-07 CHH7135 PEK → CSX Jun 7, 23:25 UTCJun 7, 23:45 UTC20m
2026-06-07 CHH7741 SZX → KWE Jun 7, 03:45 UTCJun 7, 03:55 UTC10m
2026-06-07 CHH7742 KWE → SZX Jun 7, 01:55 UTCJun 7, 02:04 UTC10m
2026-06-06 CHH7982 TPE → CAN Jun 6, 04:00 UTCJun 6, 04:25 UTC25m
2026-06-06 CHH7981 CAN → TPE Jun 6, 00:20 UTCJun 6, 01:40 UTC1h 20m
2026-06-05 CHH7132 SHA → CAN Jun 5, 00:55 UTCJun 5, 05:45 UTC4h 50m
2026-06-03 CHH7750 SZX → SYX Jun 3, 15:10 UTCJun 3, 15:25 UTC15m
2026-06-02 CHH7731 SYX → SZX Jun 2, 23:40 UTCJun 2, 23:50 UTC10m
2026-06-02 CHH7729 SZX → SHE Jun 2, 05:50 UTCJun 2, 06:00 UTC10m
2026-06-01 CHH7874 SZX → XIY Jun 1, 09:05 UTCJun 1, 09:15 UTC10m
2026-06-01 CHH7394 HGH → SZX Jun 1, 06:50 UTCJun 1, 07:15 UTC25m
2026-05-31 CHH6206 PVG → SZX May 31, 15:15 UTCMay 31, 15:40 UTC25m
2026-05-31 CHH6205 SZX → PVG May 31, 09:55 UTCMay 31, 10:05 UTC10m
2026-05-31 CHH7722 PVG → SZX May 31, 08:25 UTCMay 31, 08:35 UTC10m
2026-05-30 CHH7746 - May 30, 08:40 UTCMay 30, 09:05 UTC25m
2026-05-30 CHH7745 - May 30, 02:15 UTCMay 30, 02:25 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-7171 page for operator, model, and routing details .

Mode-S 780EFA frequently asked

What is Mode-S code 780EFA?
780EFA is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-7171.
Where is Mode-S 780EFA registered?
Mode-S code 780EFA is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 780EFA broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 780EFA, octal 36007372, decimal 7,868,154.
What flights does 780EFA operate?
Mode-S 780EFA has broadcast 20 distinct callsigns, including CHH7506, CHH7741, CHH7505, CHH7746, CHH7742.