Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

78239A

ICAO 24-bit transponder address · allocated to China

Hex
78239A
Octal
36021632
Decimal
7,873,434
Country
CN
No current signal · last broadcast 4d ago
Flights observed
59
Distinct callsigns
20
Country
CN
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S 78239A.

Country allocation

The ICAO 24-bit address 78239A 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
CHH7807 - 5 2026-07-19
CHH7204 Hainan Airlines 5 2026-07-21
CHH7939 - 3 2026-07-08
CHH7802 Hainan Airlines 2 2026-07-19
CHH7579 - 2 2026-06-29
CHH7435 - 2 2026-07-06
CHH7432 Hainan Airlines 2 2026-07-20
CHH7364 - 2 2026-06-28
CHH7363 Hainan Airlines 2 2026-06-28
CHH7360 - 2 2026-06-28
CHH7203 Hainan Airlines 2 2026-07-20
CHH7167 - 2 2026-07-07
CHH7135 - 2 2026-07-03
CHH7120 - 2 2026-06-20
CHH7049 Hainan Airlines 2 2026-07-26
CHH7038 Hainan Airlines 2 2026-07-23
CHH7002 Hainan Airlines 2 2026-07-24
CHH7940 Hainan Airlines 1 2026-06-14
CHH7811 - 1 2026-07-05
CHH7582 - 1 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CHH7049 HAK → KWE Jul 26, 04:50 UTCJul 26, 15:15 UTC10h 26m
2026-07-25 CHH7049 HAK → KWE Jul 25, 07:15 UTCJul 26, 05:05 UTC21h 50m
2026-07-24 CHH7002 CAN → HAK Jul 24, 22:55 UTCJul 24, 23:15 UTC20m
2026-07-23 CHH7038 HFE → HAK Jul 23, 13:50 UTCJul 23, 14:10 UTC20m
2026-07-22 CHH7002 CAN → HAK Jul 22, 23:10 UTCJul 22, 23:25 UTC15m
2026-07-21 CHH7204 SZX → TSN Jul 21, 11:50 UTCJul 21, 14:50 UTC3h 0m
2026-07-20 CHH7204 SZX → TSN Jul 20, 18:20 UTCJul 20, 18:35 UTC15m
2026-07-20 CHH7203 TSN → SZX Jul 20, 11:05 UTCJul 20, 14:40 UTC3h 35m
2026-07-20 CHH7432 PVG → CAN Jul 20, 04:10 UTCJul 20, 04:20 UTC10m
2026-07-19 CHH7807 - Jul 19, 05:15 UTCJul 19, 05:30 UTC15m
2026-07-19 CHH7802 CAN → PEK Jul 19, 02:30 UTCJul 19, 02:45 UTC15m
2026-07-18 CHH7807 - Jul 18, 05:30 UTCJul 18, 05:45 UTC15m
2026-07-18 CHH7802 CAN → PEK Jul 18, 02:35 UTCJul 18, 02:50 UTC16m
2026-07-16 CHH7807 - Jul 16, 04:45 UTCJul 16, 05:05 UTC20m
2026-07-14 CHH7807 - Jul 14, 07:40 UTCJul 14, 08:00 UTC20m
2026-07-14 CHH7807 - Jul 14, 04:55 UTCJul 14, 05:15 UTC20m
2026-07-10 CHH7204 - Jul 10, 17:10 UTCJul 10, 17:25 UTC15m
2026-07-10 CHH7203 - Jul 10, 10:35 UTCJul 10, 13:35 UTC3h 0m
2026-07-10 CHH7432 - Jul 10, 04:20 UTCJul 10, 04:30 UTC10m
2026-07-08 CHH7055 - Jul 8, 04:20 UTCJul 8, 14:10 UTC9h 50m
2026-07-08 CHH7939 - Jul 8, 02:10 UTCJul 8, 02:45 UTC35m
2026-07-07 CHH7582 - Jul 7, 11:50 UTCJul 7, 12:15 UTC25m
2026-07-07 CHH7167 - Jul 7, 00:10 UTCJul 7, 00:30 UTC20m
2026-07-06 CHH7435 - Jul 6, 10:00 UTCJul 6, 10:20 UTC20m
2026-07-06 CHH7189 - Jul 6, 00:55 UTCJul 6, 01:15 UTC20m
2026-07-05 CHH7811 - Jul 5, 09:50 UTCJul 5, 10:00 UTC10m
2026-07-05 CHH7167 - Jul 5, 00:10 UTCJul 5, 00:30 UTC20m
2026-07-04 CHH7435 - Jul 4, 09:20 UTCJul 4, 09:35 UTC15m
2026-07-03 CHH7135 - Jul 3, 23:35 UTCJul 4, 00:00 UTC25m
2026-07-03 CHH7448 - Jul 3, 14:45 UTCJul 3, 15:15 UTC30m
2026-07-03 CHH7347 - Jul 3, 07:20 UTCJul 3, 07:40 UTC20m
2026-07-02 CHH6213 - Jul 2, 23:00 UTCJul 2, 23:10 UTC10m
2026-07-02 CHH7112 - Jul 2, 08:20 UTCJul 2, 16:00 UTC7h 40m
2026-07-01 CHH7135 - Jul 1, 23:25 UTCJul 1, 23:45 UTC20m
2026-06-30 CHH7384 - Jun 30, 06:25 UTCJun 30, 15:20 UTC8h 55m
2026-06-29 CHH7579 - Jun 29, 16:25 UTCJun 30, 09:55 UTC17h 31m
2026-06-29 CHH7579 - Jun 29, 13:34 UTCJun 30, 09:55 UTC20h 21m
2026-06-29 CHH7280 - Jun 29, 08:35 UTCJun 29, 08:44 UTC10m
2026-06-28 CHH7364 - Jun 28, 14:04 UTCJun 28, 14:19 UTC15m
2026-06-28 CHH7363 SYX → LHW Jun 28, 11:39 UTCJun 28, 12:09 UTC30m
2026-06-28 CHH7360 - Jun 28, 00:00 UTCJun 28, 09:45 UTC9h 45m
2026-06-27 CHH7364 LHW → SYX Jun 27, 14:20 UTCJun 27, 14:39 UTC20m
2026-06-27 CHH7363 SYX → LHW Jun 27, 11:59 UTCJun 27, 12:29 UTC30m
2026-06-26 CHH7360 - Jun 26, 17:04 UTCJun 27, 09:40 UTC16h 35m
2026-06-25 CHH7204 SZX → TSN Jun 25, 11:25 UTCJun 25, 14:14 UTC2h 50m
2026-06-24 CHH7204 SZX → TSN Jun 24, 10:19 UTCJun 24, 14:00 UTC3h 40m
2026-06-21 CHH7089 - Jun 21, 11:05 UTCJun 21, 15:09 UTC4h 5m
2026-06-21 CHH7043 - Jun 21, 02:15 UTCJun 21, 08:20 UTC6h 5m
2026-06-20 CHH7120 - Jun 20, 11:14 UTCJun 21, 08:20 UTC21h 5m
2026-06-20 CHH7120 - Jun 20, 05:49 UTCJun 21, 02:20 UTC20h 30m

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.

Mode-S 78239A frequently asked

What is Mode-S code 78239A?
78239A is an ICAO 24-bit transponder address. Allocated to China.
Where is Mode-S 78239A registered?
Mode-S code 78239A is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78239A broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78239A, octal 36021632, decimal 7,873,434.
What flights does 78239A operate?
Mode-S 78239A has broadcast 20 distinct callsigns, including CHH7807, CHH7204, CHH7939, CHH7802, CHH7579.