Apparatus

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sensors Mode-S transponder

7801B2

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-HTI · AIRBUS A-321

Hex
7801B2
Octal
36000662
Decimal
7,864,754
Country
CN
Tail
B-HTI
Type
A321
Transponder active on ground
Flights observed
439
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 16:25 UTC

Last known position

Most recent position reported by Mode-S 7801B2.

Country allocation

The ICAO 24-bit address 7801B2 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
HKE111 Hong Kong Express Airways 53 2026-07-24
HKE110 Hong Kong Express Airways 44 2026-07-24
HKE703 Hong Kong Express Airways 24 2026-07-21
HKE702 Hong Kong Express Airways 21 2026-07-21
HKE113 Hong Kong Express Airways 21 2026-07-23
HKE112 Hong Kong Express Airways 18 2026-07-23
HKE631 Hong Kong Express Airways 14 2026-07-25
HKE135 - 12 2026-06-29
HKE639 Hong Kong Express Airways 11 2026-07-19
HKE559 Hong Kong Express Airways 11 2026-07-24
HKE558 Hong Kong Express Airways 11 2026-07-24
HKE226 Hong Kong Express Airways 11 2026-07-25
HKE173 - 11 2026-07-14
HKE630 Hong Kong Express Airways 10 2026-07-25
HKE227 Hong Kong Express Airways 10 2026-07-26
HKE172 - 10 2026-07-14
HKE134 - 9 2026-06-29
HKE638 Hong Kong Express Airways 8 2026-07-19
HKE131 Hong Kong Express Airways 8 2026-07-23
HKE130 Hong Kong Express Airways 8 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 HKE695 FUK → HKG Jul 26, 14:15 UTCJul 26, 16:20 UTC2h 5m
2026-07-26 HKE695 FUK → HKG Jul 26, 12:55 UTCJul 26, 13:10 UTC15m
2026-07-26 HKE694 HKG → FUK Jul 26, 07:20 UTCJul 26, 10:05 UTC2h 45m
2026-07-26 HKE227 NGB → HKG Jul 26, 04:00 UTCJul 26, 04:15 UTC15m
2026-07-25 HKE226 HKG → NGB Jul 25, 12:30 UTCJul 26, 03:25 UTC14h 55m
2026-07-25 HKE631 ICN → HKG Jul 25, 06:50 UTCJul 25, 10:20 UTC3h 30m
2026-07-25 HKE630 HKG → ICN Jul 25, 02:25 UTCJul 25, 05:40 UTC3h 15m
2026-07-24 HKE517 MNL → HKG Jul 24, 20:05 UTCJul 24, 20:25 UTC20m
2026-07-24 HKE517 MNL → HKG Jul 24, 18:40 UTCJul 24, 19:10 UTC30m
2026-07-24 HKE516 HKG → MNL Jul 24, 17:00 UTCJul 24, 17:35 UTC35m
2026-07-24 HKE516 HKG → MNL Jul 24, 15:50 UTCJul 24, 16:10 UTC20m
2026-07-24 HKE559 DAD → HKG Jul 24, 12:30 UTCJul 24, 12:50 UTC20m
2026-07-24 HKE558 HKG → DAD Jul 24, 08:55 UTCJul 24, 09:10 UTC15m
2026-07-24 HKE111 TPE → HKG Jul 24, 05:50 UTCJul 24, 07:05 UTC1h 15m
2026-07-24 HKE110 HKG → TPE Jul 24, 03:05 UTCJul 24, 04:30 UTC1h 25m
2026-07-23 HKE183 RMQ → HKG Jul 23, 13:00 UTCJul 23, 14:10 UTC1h 10m
2026-07-23 HKE182 HKG → RMQ Jul 23, 10:40 UTCJul 23, 11:55 UTC1h 15m
2026-07-23 HKE113 TPE → HKG Jul 23, 07:55 UTCJul 23, 09:15 UTC1h 20m
2026-07-23 HKE112 HKG → TPE Jul 23, 05:25 UTCJul 23, 07:00 UTC1h 35m
2026-07-23 HKE131 KHH → HKG Jul 23, 02:25 UTCJul 23, 03:30 UTC1h 5m
2026-07-23 HKE130 HKG → KHH Jul 23, 00:25 UTCJul 23, 01:25 UTC1h 0m
2026-07-22 HKE795 DMK → HKG Jul 22, 15:25 UTCJul 22, 15:30 UTC5m
2026-07-22 HKE795 DMK → HKG Jul 22, 10:20 UTCJul 22, 13:45 UTC3h 25m
2026-07-22 HKE103 TPE → HKG Jul 22, 04:15 UTCJul 22, 05:25 UTC1h 10m
2026-07-22 HKE102 HKG → RMQ Jul 22, 02:00 UTCJul 22, 03:10 UTC1h 10m
2026-07-21 HKE703 BKK → HKG Jul 21, 15:30 UTCJul 21, 15:35 UTC5m
2026-07-21 HKE703 BKK → HKG Jul 21, 13:05 UTCJul 21, 13:35 UTC30m
2026-07-21 HKE702 HKG → BKK Jul 21, 09:15 UTCJul 21, 11:40 UTC2h 25m
2026-07-21 HKE111 TPE → HKG Jul 21, 05:40 UTCJul 21, 06:55 UTC1h 15m
2026-07-21 HKE110 HKG → TPE Jul 21, 03:00 UTCJul 21, 04:30 UTC1h 30m
2026-07-20 HKE517 MNL → HKG Jul 20, 18:00 UTCJul 20, 19:35 UTC1h 35m
2026-07-20 HKE516 HKG → MNL Jul 20, 14:55 UTCJul 20, 16:35 UTC1h 40m
2026-07-20 HKE559 DAD → HKG Jul 20, 13:00 UTCJul 20, 13:15 UTC15m
2026-07-20 HKE558 HKG → DAD Jul 20, 09:10 UTCJul 20, 09:25 UTC15m
2026-07-20 HKE111 TPE → HKG Jul 20, 06:30 UTCJul 20, 07:50 UTC1h 20m
2026-07-20 HKE110 HKG → TPE Jul 20, 03:30 UTCJul 20, 05:00 UTC1h 30m
2026-07-19 HKE639 FUK → HKG Jul 19, 09:25 UTCJul 19, 12:15 UTC2h 50m
2026-07-19 HKE638 HKG → FUK Jul 19, 04:45 UTCJul 19, 07:30 UTC2h 45m
2026-07-18 HKE226 - Jul 18, 12:20 UTCJul 19, 03:15 UTC14h 55m
2026-07-18 HKE113 - Jul 18, 07:40 UTCJul 18, 08:55 UTC1h 15m
2026-07-18 HKE112 HKG → TPE Jul 18, 05:10 UTCJul 18, 06:30 UTC1h 20m
2026-07-18 HKE131 KHH → HKG Jul 18, 02:19 UTCJul 18, 03:30 UTC1h 11m
2026-07-18 HKE130 HKG → KHH Jul 18, 00:15 UTCJul 18, 01:20 UTC1h 5m
2026-07-17 HKE559 - Jul 17, 13:05 UTCJul 17, 13:20 UTC15m
2026-07-17 HKE558 - Jul 17, 08:54 UTCJul 17, 09:10 UTC15m
2026-07-17 HKE111 TPE → HKG Jul 17, 06:10 UTCJul 17, 07:30 UTC1h 20m
2026-07-17 HKE110 HKG → TPE Jul 17, 03:20 UTCJul 17, 04:54 UTC1h 35m
2026-07-16 HKE235 - Jul 16, 21:00 UTCJul 16, 21:35 UTC35m
2026-07-16 HKE234 - Jul 16, 14:25 UTCJul 16, 14:40 UTC15m
2026-07-16 HKE639 - Jul 16, 10:04 UTCJul 16, 13:00 UTC2h 55m

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

Mode-S 7801B2 frequently asked

What is Mode-S code 7801B2?
7801B2 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-HTI.
Where is Mode-S 7801B2 registered?
Mode-S code 7801B2 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7801B2 broadcasting right now?
Mode-S 7801B2 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7801B2, octal 36000662, decimal 7,864,754.
What flights does 7801B2 operate?
Mode-S 7801B2 has broadcast 20 distinct callsigns, including HKE111, HKE110, HKE703, HKE702, HKE113.