Apparatus

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sensors Mode-S transponder

78027D

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1729 · BOEING 737-800

Hex
78027D
Octal
36001175
Decimal
7,864,957
Country
CN
Tail
B-1729
Type
B738
No current signal · last broadcast 6d ago
Flights observed
98
Distinct callsigns
20
Country
CN
Last broadcast
6d ago

Last known position

Most recent position reported by Mode-S 78027D.

Country allocation

The ICAO 24-bit address 78027D 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 - 7 2026-07-01
CHH7713 - 4 2026-07-04
CHH7488 - 3 2026-07-15
CHH7775 Hainan Airlines 2 2026-06-14
CHH7705 - 2 2026-06-12
CHH7613 - 2 2026-07-13
CHH7528 - 2 2026-07-19
CHH7512 - 2 2026-06-26
CHH7193 - 2 2026-07-12
CHH7185 Hainan Airlines 2 2026-07-23
CHH7134 - 2 2026-07-23
CHH7133 - 2 2026-07-23
CHH6394 - 2 2026-05-02
CHH440 - 2 2026-07-04
CHH439 - 2 2026-07-04
CHH7874 - 1 2026-07-08
CHH7873 - 1 2026-07-08
CHH7872 - 1 2026-06-25
CHH7871 - 1 2026-06-25
CHH7869 - 1 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 CHH7347 PEK → TFU Jul 25, 06:45 UTCJul 25, 07:05 UTC20m
2026-07-24 CHH7777 PEK → BAR Jul 24, 06:30 UTCJul 24, 14:30 UTC8h 0m
2026-07-23 CHH7185 PEK → YIH Jul 23, 23:15 UTCJul 23, 23:35 UTC20m
2026-07-23 CHH7134 - Jul 23, 15:15 UTCJul 23, 15:35 UTC20m
2026-07-23 CHH7133 - Jul 23, 12:10 UTCJul 23, 12:30 UTC20m
2026-07-23 CHH7568 CKG → PEK Jul 23, 09:15 UTCJul 23, 09:30 UTC15m
2026-07-21 CHH7308 - Jul 21, 00:15 UTCJul 21, 00:25 UTC10m
2026-07-20 CHH7668 - Jul 20, 05:50 UTCJul 20, 09:20 UTC3h 30m
2026-07-19 CHH7528 - Jul 19, 09:50 UTCJul 20, 09:15 UTC23h 25m
2026-07-19 CHH7528 - Jul 19, 05:30 UTCJul 19, 10:15 UTC4h 45m
2026-07-15 CHH7488 - Jul 15, 04:45 UTCJul 15, 13:25 UTC8h 40m
2026-07-14 CHH7488 - Jul 14, 13:25 UTCJul 15, 13:15 UTC23h 49m
2026-07-14 CHH7488 - Jul 14, 12:45 UTCJul 15, 04:45 UTC15h 59m
2026-07-13 CHH7377 - Jul 13, 14:25 UTCJul 13, 14:35 UTC10m
2026-07-13 CHH7613 - Jul 13, 00:10 UTCJul 13, 00:20 UTC10m
2026-07-12 CHH7193 - Jul 12, 12:05 UTCJul 12, 12:15 UTC10m
2026-07-12 CHH7147 - Jul 12, 00:10 UTCJul 12, 00:30 UTC20m
2026-07-11 CHH6216 - Jul 11, 09:25 UTCJul 11, 09:35 UTC10m
2026-07-11 CHH6215 - Jul 11, 02:30 UTCJul 11, 02:45 UTC15m
2026-07-09 CHH7026 - Jul 9, 15:30 UTCJul 9, 15:40 UTC10m
2026-07-08 CHH7735 - Jul 8, 22:40 UTCJul 8, 22:50 UTC10m
2026-07-08 CHH7873 - Jul 8, 18:40 UTCJul 8, 18:55 UTC15m
2026-07-08 CHH7874 - Jul 8, 09:25 UTCJul 8, 09:35 UTC10m
2026-07-08 CHH7869 - Jul 8, 06:40 UTCJul 8, 06:50 UTC10m
2026-07-05 CHH7557 - Jul 5, 15:45 UTCJul 5, 16:00 UTC15m
2026-07-05 CHH7732 - Jul 5, 12:55 UTCJul 5, 13:10 UTC15m
2026-07-05 CHH7731 - Jul 5, 00:35 UTCJul 5, 00:50 UTC15m
2026-07-04 CHH7713 - Jul 4, 18:05 UTCJul 4, 18:25 UTC20m
2026-07-04 CHH7713 - Jul 4, 15:10 UTCJul 4, 15:40 UTC30m
2026-07-04 CHH440 - Jul 4, 05:40 UTCJul 4, 07:45 UTC2h 5m
2026-07-04 CHH439 - Jul 4, 01:25 UTCJul 4, 03:30 UTC2h 5m
2026-07-04 - - Jul 4, 00:30 UTCJul 4, 00:40 UTC10m
2026-07-03 CHH6246 - Jul 3, 06:25 UTCJul 3, 10:15 UTC3h 50m
2026-07-02 CHH7105 - Jul 2, 23:15 UTCJul 2, 23:25 UTC10m
2026-07-01 CHH7322 - Jul 1, 06:05 UTCJul 2, 00:50 UTC18h 45m
2026-07-01 CHH7322 - Jul 1, 03:25 UTCJul 2, 00:50 UTC21h 25m
2026-06-30 CHH7054 - Jun 30, 18:00 UTCJul 1, 06:20 UTC12h 20m
2026-06-30 CHH7143 - Jun 30, 07:15 UTCJun 30, 07:25 UTC10m
2026-06-29 CHH6213 - Jun 29, 22:55 UTCJun 29, 23:05 UTC10m
2026-06-26 CHH7512 - Jun 26, 09:24 UTCJun 26, 09:35 UTC10m
2026-06-26 CHH7511 - Jun 26, 07:24 UTCJun 26, 07:35 UTC10m
2026-06-25 CHH7872 - Jun 25, 05:09 UTCJun 25, 05:20 UTC10m
2026-06-25 CHH7871 - Jun 25, 03:29 UTCJun 25, 03:40 UTC10m
2026-06-23 CHH6217 PEK → XIY Jun 23, 07:45 UTCJun 23, 08:00 UTC15m
2026-06-22 CHH7613 PEK → PVG Jun 22, 23:55 UTCJun 23, 00:04 UTC10m
2026-06-22 CHH7638 - Jun 22, 05:49 UTCJun 22, 06:00 UTC10m
2026-06-19 CHH7644 - Jun 19, 10:39 UTCJun 19, 10:50 UTC10m
2026-06-18 CHH7279 PEK → SYX Jun 18, 08:05 UTCJun 18, 11:45 UTC3h 40m
2026-06-15 CHH7164 - Jun 15, 05:10 UTCJun 15, 08:40 UTC3h 30m
2026-06-14 CHH7775 SZX → TYN Jun 14, 06:10 UTCJun 14, 06:20 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-1729 page for operator, model, and routing details .

Mode-S 78027D frequently asked

What is Mode-S code 78027D?
78027D is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1729.
Where is Mode-S 78027D registered?
Mode-S code 78027D is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78027D broadcasting right now?
No active broadcast right now. Last signal was 6d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78027D, octal 36001175, decimal 7,864,957.
What flights does 78027D operate?
Mode-S 78027D has broadcast 20 distinct callsigns, including CHH7322, CHH7713, CHH7488, CHH7775, CHH7705.