Apparatus

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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 8h ago
Flights observed
368
Distinct callsigns
20
Country
CN
Last broadcast
8h ago

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 - 21 2026-07-13
HKE845 - 18 2026-07-07
HKE844 - 14 2026-07-07
HKE716 - 14 2026-07-13
HKE791 - 13 2026-06-22
HKE790 - 11 2026-06-22
HKE541 - 11 2026-06-29
HKE540 - 10 2026-06-28
HKE172 - 9 2026-06-28
HKE768 - 8 2026-07-09
HKE173 - 8 2026-06-28
HKE833 - 7 2026-06-30
HKE746 Hong Kong Express Airways 7 2026-06-17
HKE213 - 7 2026-07-06
HKE212 - 7 2026-07-09
HKE131 - 7 2026-06-27
HKE858 Hong Kong Express Airways 6 2026-07-04
HKE832 - 6 2026-06-30
HKE695 Hong Kong Express Airways 6 2026-06-11
HKE272 - 6 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-07-12 HKE862 HKG → KIX Jul 12, 08:15 UTCJul 12, 11:40 UTC3h 25m
2026-07-12 HKE879D - Jul 12, 05:20 UTCJul 12, 06:50 UTC1h 30m
2026-07-12 HKE858D - Jul 12, 02:40 UTCJul 12, 03:50 UTC1h 10m
2026-07-11 HKE651 - Jul 11, 15:35 UTCJul 11, 15:50 UTC15m
2026-07-11 HKE651 - Jul 11, 11:50 UTCJul 11, 14:55 UTC3h 5m
2026-07-11 HKE650 HKG → NRT Jul 11, 06:30 UTCJul 11, 10:30 UTC4h 0m
2026-07-10 HKE643 - Jul 10, 10:40 UTCJul 10, 13:55 UTC3h 15m
2026-07-10 HKE642 - Jul 10, 06:15 UTCJul 10, 09:25 UTC3h 10m
2026-07-09 HKE769 - Jul 9, 20:25 UTCJul 9, 20:50 UTC25m
2026-07-09 HKE768 - Jul 9, 15:30 UTCJul 9, 15:45 UTC15m
2026-07-09 HKE768 - Jul 9, 12:35 UTCJul 9, 12:50 UTC15m
2026-07-09 HKE212 - Jul 9, 06:30 UTCJul 9, 10:50 UTC4h 20m
2026-07-08 HKE689 KIX → HKG Jul 8, 11:50 UTCJul 8, 15:10 UTC3h 20m
2026-07-08 HKE688 HKG → KIX Jul 8, 07:00 UTCJul 8, 10:30 UTC3h 30m
2026-07-08 HKE103 - Jul 8, 04:25 UTCJul 8, 05:30 UTC1h 5m
2026-07-08 HKE102 - Jul 8, 01:50 UTCJul 8, 03:00 UTC1h 10m
2026-07-07 HKE845 - Jul 7, 10:05 UTCJul 7, 12:15 UTC2h 10m
2026-07-07 HKE844 - Jul 7, 06:45 UTCJul 7, 08:15 UTC1h 30m
2026-07-07 HKE553 - Jul 7, 04:35 UTCJul 7, 04:55 UTC20m
2026-07-07 HKE552 - Jul 7, 00:45 UTCJul 7, 00:55 UTC10m
2026-07-06 HKE769 - Jul 6, 20:20 UTCJul 6, 20:40 UTC20m
2026-07-06 HKE769 - Jul 6, 17:15 UTCJul 6, 17:25 UTC10m
2026-07-06 HKE768 - Jul 6, 15:40 UTCJul 6, 15:50 UTC10m
2026-07-06 HKE768 - Jul 6, 12:45 UTCJul 6, 12:55 UTC10m
2026-07-06 HKE213 HKG → HKG Jul 6, 06:30 UTCJul 6, 11:05 UTC4h 35m
2026-07-06 HKE523 - Jul 6, 02:35 UTCJul 6, 04:20 UTC1h 45m
2026-07-05 HKE522 - Jul 5, 23:50 UTCJul 6, 01:25 UTC1h 35m
2026-07-05 HKE845 - Jul 5, 10:10 UTCJul 5, 12:05 UTC1h 55m
2026-07-05 HKE844 - Jul 5, 06:40 UTCJul 5, 08:50 UTC2h 10m
2026-07-05 HKE879 - Jul 5, 04:10 UTCJul 5, 04:20 UTC10m
2026-07-04 HKE858 HKG → ISG Jul 4, 23:55 UTCJul 5, 03:35 UTC3h 40m
2026-07-04 HKE733 - Jul 4, 17:45 UTCJul 4, 19:05 UTC1h 20m
2026-07-04 HKE732 - Jul 4, 15:15 UTCJul 4, 16:45 UTC1h 30m
2026-07-04 HKE732 - Jul 4, 14:20 UTCJul 4, 14:35 UTC15m
2026-07-04 HKE717 - Jul 4, 08:35 UTCJul 4, 08:50 UTC15m
2026-07-04 HKE717 - Jul 4, 05:00 UTCJul 4, 05:15 UTC15m
2026-07-04 HKE716 - Jul 4, 03:35 UTCJul 4, 03:55 UTC20m
2026-07-04 HKE716 - Jul 4, 00:30 UTCJul 4, 00:50 UTC20m
2026-07-03 HKE845 - Jul 3, 13:25 UTCJul 3, 13:50 UTC25m

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 8h ago.
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, HKE845, HKE844, HKE716, HKE791.