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sensors Mode-S transponder

7801C2

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-HSM · AIRBUS A-320

Hex
7801C2
Octal
36000702
Decimal
7,864,770
Country
CN
Tail
B-HSM
Type
A320
No current signal · last broadcast Jul 26, 12:50 UTC
Flights observed
407
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 12:50 UTC

Last known position

Most recent position reported by Mode-S 7801C2.

Country allocation

The ICAO 24-bit address 7801C2 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
HKE717 Hong Kong Express Airways 27 2026-07-25
HKE716 Hong Kong Express Airways 21 2026-07-25
HKE845 - 19 2026-07-15
HKE844 - 15 2026-07-15
HKE791 - 13 2026-06-22
HKE790 - 11 2026-06-22
HKE746 Hong Kong Express Airways 11 2026-07-26
HKE541 - 11 2026-06-29
HKE540 - 10 2026-06-28
HKE768 - 9 2026-07-20
HKE747 Hong Kong Express Airways 9 2026-07-26
HKE172 - 9 2026-06-28
HKE212 - 8 2026-07-20
HKE173 - 8 2026-06-28
HKE833 - 7 2026-06-30
HKE272 - 7 2026-07-24
HKE250 - 7 2026-07-16
HKE213 - 7 2026-07-06
HKE131 - 7 2026-06-27
HKE879 - 6 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 HKE747 PEN → HKG Jul 26, 12:25 UTCJul 26, 12:40 UTC15m
2026-07-26 HKE746 HKG → PEN Jul 26, 07:40 UTCJul 26, 07:55 UTC15m
2026-07-26 HKE746 HKG → PEN Jul 26, 04:35 UTCJul 26, 04:50 UTC15m
2026-07-25 HKE717 SZB → HKG Jul 25, 05:00 UTCJul 25, 05:10 UTC10m
2026-07-25 HKE716 HKG → SZB Jul 25, 03:15 UTCJul 25, 03:40 UTC25m
2026-07-25 HKE716 HKG → SZB Jul 25, 00:30 UTCJul 25, 00:40 UTC10m
2026-07-24 HKE272 HKG → HKG Jul 24, 10:15 UTCJul 24, 16:40 UTC6h 25m
2026-07-24 HKE717 SZB → HKG Jul 24, 08:05 UTCJul 24, 08:30 UTC25m
2026-07-24 HKE717 SZB → HKG Jul 24, 05:00 UTCJul 24, 05:15 UTC15m
2026-07-24 HKE716 HKG → SZB Jul 24, 00:25 UTCJul 24, 00:45 UTC20m
2026-07-23 HKE517 MNL → HKG Jul 23, 17:55 UTCJul 23, 19:30 UTC1h 35m
2026-07-23 HKE516 HKG → MNL Jul 23, 14:55 UTCJul 23, 16:30 UTC1h 35m
2026-07-23 HKE747 PEN → HKG Jul 23, 11:45 UTCJul 23, 12:00 UTC15m
2026-07-23 HKE747 PEN → HKG Jul 23, 08:35 UTCJul 23, 08:45 UTC10m
2026-07-23 HKE746 HKG → PEN Jul 23, 04:05 UTCJul 23, 04:20 UTC15m
2026-07-23 HKE9011 MFM → MFM Jul 23, 01:30 UTCJul 23, 01:45 UTC15m
2026-07-22 HKE9011 MFM → MFM Jul 22, 23:55 UTCJul 23, 00:05 UTC10m
2026-07-22 HKE273 - Jul 22, 11:10 UTCJul 22, 15:35 UTC4h 25m
2026-07-22 HKE717 SZB → HKG Jul 22, 05:10 UTCJul 22, 05:20 UTC10m
2026-07-22 HKE716 HKG → SZB Jul 22, 03:25 UTCJul 22, 03:40 UTC15m
2026-07-22 HKE716 HKG → SZB Jul 22, 00:30 UTCJul 22, 00:45 UTC15m
2026-07-21 HKE689 KIX → HKG Jul 21, 12:00 UTCJul 21, 15:25 UTC3h 25m
2026-07-21 HKE688 HKG → KIX Jul 21, 07:10 UTCJul 21, 10:40 UTC3h 30m
2026-07-20 HKE879 HKG → HKG Jul 20, 23:50 UTCJul 21, 04:35 UTC4h 45m
2026-07-20 HKE769 PEN → HKG Jul 20, 20:30 UTCJul 20, 20:55 UTC25m
2026-07-20 HKE768 - Jul 20, 12:40 UTCJul 20, 12:55 UTC15m
2026-07-20 HKE212 HKG → HKG Jul 20, 06:35 UTCJul 20, 10:55 UTC4h 20m
2026-07-19 HKE747 - Jul 19, 11:35 UTCJul 19, 11:50 UTC15m
2026-07-19 HKE746 - Jul 19, 04:05 UTCJul 19, 04:20 UTC15m
2026-07-18 HKE671 - Jul 18, 12:05 UTCJul 18, 15:20 UTC3h 15m
2026-07-18 HKE670 - Jul 18, 07:05 UTCJul 18, 10:45 UTC3h 40m
2026-07-16 HKE251 - Jul 16, 15:14 UTCJul 16, 15:40 UTC25m
2026-07-16 HKE250 - Jul 16, 10:55 UTCJul 16, 11:10 UTC15m
2026-07-16 HKE717 - Jul 16, 08:35 UTCJul 16, 08:55 UTC20m
2026-07-16 HKE717 - Jul 16, 05:05 UTCJul 16, 05:20 UTC15m
2026-07-16 HKE716 - Jul 16, 03:45 UTCJul 16, 03:55 UTC10m
2026-07-16 HKE716 - Jul 16, 00:45 UTCJul 16, 01:00 UTC15m
2026-07-15 HKE845 - Jul 15, 12:30 UTCJul 15, 13:50 UTC1h 20m
2026-07-15 HKE844 - Jul 15, 07:30 UTCJul 15, 08:50 UTC1h 20m
2026-07-14 HKE703 - Jul 14, 15:05 UTCJul 14, 15:30 UTC25m
2026-07-14 HKE703 - Jul 14, 12:55 UTCJul 14, 13:10 UTC15m
2026-07-14 HKE702 - Jul 14, 11:45 UTCJul 14, 11:55 UTC10m
2026-07-14 HKE702 - Jul 14, 09:35 UTCJul 14, 09:50 UTC15m
2026-07-14 HKE663 - Jul 14, 01:00 UTCJul 14, 08:10 UTC7h 10m
2026-07-13 HKE272 - Jul 13, 10:30 UTCJul 13, 15:50 UTC5h 20m
2026-07-13 HKE717 - Jul 13, 08:20 UTCJul 13, 08:35 UTC15m
2026-07-13 HKE717 - Jul 13, 05:01 UTCJul 13, 05:15 UTC15m
2026-07-13 HKE716 - Jul 13, 03:20 UTCJul 13, 03:30 UTC10m
2026-07-13 HKE716 - Jul 13, 00:25 UTCJul 13, 00:40 UTC15m
2026-07-12 HKE863 KIX → HKG Jul 12, 12:50 UTCJul 12, 16:05 UTC3h 15m

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

Mode-S 7801C2 frequently asked

What is Mode-S code 7801C2?
7801C2 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-HSM.
Where is Mode-S 7801C2 registered?
Mode-S code 7801C2 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7801C2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 12:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7801C2, octal 36000702, decimal 7,864,770.
What flights does 7801C2 operate?
Mode-S 7801C2 has broadcast 20 distinct callsigns, including HKE717, HKE716, HKE845, HKE844, HKE791.