Apparatus

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sensors Mode-S transponder

78141D

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1142 · BOEING 737 MAX 8

Hex
78141D
Octal
36012035
Decimal
7,869,469
Country
CN
Tail
B-1142
Type
B38M
No current signal · last broadcast Jul 26, 11:30 UTC
Flights observed
182
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 11:30 UTC

Last known position

Most recent position reported by Mode-S 78141D.

Country allocation

The ICAO 24-bit address 78141D 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
CHH7924 Hainan Airlines 12 2026-07-24
CHH7923 Hainan Airlines 12 2026-07-24
CHH447 Hainan Airlines 10 2026-06-08
CHH7909 Hainan Airlines 7 2026-06-09
CHH756 - 7 2026-07-01
CHH755 - 7 2026-07-01
CHH748 Hainan Airlines 6 2026-06-06
CHH791 - 5 2026-06-28
CHH474 Hainan Airlines 5 2026-06-13
CHH473 - 5 2026-06-13
CHH448 Hainan Airlines 5 2026-06-10
CHH7996 Hainan Airlines 4 2026-05-09
CHH7995 Hainan Airlines 4 2026-05-09
CHH7910 Hainan Airlines 4 2026-06-08
CHH747 Hainan Airlines 4 2026-05-28
CHH430 - 4 2026-07-08
CHH429 - 4 2026-07-08
CHH7763 Hainan Airlines 3 2026-07-22
CHH7567 Hainan Airlines 3 2026-05-07
CHH7557 Hainan Airlines 3 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CHH7082 PEK → HAK Jul 26, 11:20 UTCJul 26, 11:30 UTC10m
2026-07-26 CHH7238 XIY → PEK Jul 26, 03:20 UTCJul 26, 08:55 UTC5h 36m
2026-07-25 CHH7557 SZX → CKG Jul 25, 14:45 UTCJul 25, 14:55 UTC10m
2026-07-25 CHH7772 - Jul 25, 13:15 UTCJul 25, 13:25 UTC10m
2026-07-24 CHH6336 - Jul 24, 16:30 UTCJul 24, 16:40 UTC10m
2026-07-24 CHH7924 KUL → CKG Jul 24, 06:40 UTCJul 24, 09:45 UTC3h 5m
2026-07-24 CHH7923 CKG → KUL Jul 24, 01:45 UTCJul 24, 04:50 UTC3h 5m
2026-07-23 CHH7557 SZX → CKG Jul 23, 14:45 UTCJul 23, 14:55 UTC10m
2026-07-23 CHH7772 - Jul 23, 08:00 UTCJul 23, 12:00 UTC4h 0m
2026-07-22 CHH7763 SZX → NKG Jul 22, 22:30 UTCJul 22, 22:40 UTC10m
2026-07-22 CHH6056 LHW → SZX Jul 22, 16:45 UTCJul 22, 16:55 UTC10m
2026-07-21 CHH7763 SZX → NKG Jul 21, 22:50 UTCJul 21, 23:05 UTC15m
2026-07-21 CHH7396 - Jul 21, 14:55 UTCJul 21, 15:45 UTC50m
2026-07-21 CHH7395 - Jul 21, 07:45 UTCJul 21, 07:55 UTC10m
2026-07-21 CHH7764 NKG → SZX Jul 21, 05:20 UTCJul 21, 05:30 UTC10m
2026-07-20 CHH7763 SZX → NKG Jul 20, 22:35 UTCJul 20, 22:45 UTC10m
2026-07-20 CHH7924 KUL → CKG Jul 20, 06:45 UTCJul 20, 09:45 UTC3h 0m
2026-07-20 CHH7923 - Jul 20, 01:25 UTCJul 20, 04:30 UTC3h 5m
2026-07-19 CHH7557 - Jul 19, 14:45 UTCJul 19, 14:55 UTC10m
2026-07-19 CHH7275 - Jul 19, 07:05 UTCJul 19, 07:15 UTC10m
2026-07-19 CHH7764 NKG → SZX Jul 19, 05:35 UTCJul 19, 05:45 UTC10m
2026-07-18 CHH7276 - Jul 18, 12:35 UTCJul 18, 12:45 UTC10m
2026-07-18 CHH7740 - Jul 18, 04:40 UTCJul 18, 04:50 UTC10m
2026-07-17 CHH7739 - Jul 17, 22:40 UTCJul 17, 22:49 UTC10m
2026-07-17 CHH7924 - Jul 17, 06:25 UTCJul 17, 09:25 UTC3h 0m
2026-07-17 CHH7923 - Jul 17, 04:10 UTCJul 17, 04:29 UTC20m
2026-07-16 CHH7924 - Jul 16, 09:15 UTCJul 17, 01:49 UTC16h 35m
2026-07-16 CHH7924 - Jul 16, 06:30 UTCJul 17, 01:49 UTC19h 20m
2026-07-15 CHH7923 - Jul 15, 09:20 UTCJul 16, 04:25 UTC19h 5m
2026-07-15 CHH7923 - Jul 15, 09:00 UTCJul 16, 04:25 UTC19h 25m
2026-07-15 CHH7924 - Jul 15, 06:20 UTCJul 16, 04:25 UTC22h 5m
2026-07-14 CHH7923 - Jul 14, 09:25 UTCJul 15, 04:20 UTC18h 54m
2026-07-14 CHH7924 - Jul 14, 06:45 UTCJul 14, 07:00 UTC15m
2026-07-14 CHH7923 - Jul 14, 01:20 UTCJul 14, 04:30 UTC3h 10m
2026-07-12 CHH7924 - Jul 12, 06:20 UTCJul 12, 09:25 UTC3h 5m
2026-07-11 CHH7923 - Jul 11, 09:20 UTCJul 12, 04:45 UTC19h 25m
2026-07-11 CHH7924 - Jul 11, 06:35 UTCJul 12, 02:05 UTC19h 30m
2026-07-10 CHH7923 - Jul 10, 09:20 UTCJul 11, 04:20 UTC19h 0m
2026-07-10 CHH7923 - Jul 10, 09:10 UTCJul 11, 04:20 UTC19h 10m
2026-07-10 CHH7924 - Jul 10, 06:30 UTCJul 11, 01:15 UTC18h 45m
2026-07-10 CHH7923 - Jul 10, 04:15 UTCJul 10, 04:30 UTC15m
2026-07-09 CHH7924 - Jul 9, 09:20 UTCJul 10, 01:50 UTC16h 30m
2026-07-09 CHH7924 - Jul 9, 06:40 UTCJul 10, 01:50 UTC19h 10m
2026-07-08 CHH7923 - Jul 8, 13:25 UTCJul 9, 04:35 UTC15h 10m
2026-07-08 CHH430 - Jul 8, 07:00 UTCJul 8, 09:00 UTC2h 0m
2026-07-08 CHH429 - Jul 8, 00:45 UTCJul 8, 05:10 UTC4h 25m
2026-07-06 CHH7032 - Jul 6, 06:20 UTCJul 6, 06:35 UTC15m
2026-07-01 CHH756 - Jul 1, 13:10 UTCJul 1, 13:25 UTC15m
2026-07-01 CHH497 - Jul 1, 11:15 UTCJul 1, 11:40 UTC25m
2026-07-01 CHH498 - Jul 1, 04:40 UTCJul 1, 05:00 UTC20m

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-1142 page for operator, model, and routing details .

Mode-S 78141D frequently asked

What is Mode-S code 78141D?
78141D is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1142.
Where is Mode-S 78141D registered?
Mode-S code 78141D is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78141D broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78141D, octal 36012035, decimal 7,869,469.
What flights does 78141D operate?
Mode-S 78141D has broadcast 20 distinct callsigns, including CHH7924, CHH7923, CHH447, CHH7909, CHH756.