Apparatus

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sensors Mode-S transponder

7812E4

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1372 · BOEING 737-800

Hex
7812E4
Octal
36011344
Decimal
7,869,156
Country
CN
Tail
B-1372
Type
B738
No current signal · last broadcast 1h ago
Flights observed
85
Distinct callsigns
20
Country
CN
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 7812E4.

Country allocation

The ICAO 24-bit address 7812E4 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
CHH7874 Hainan Airlines 9 2026-05-22
CHH7870 Hainan Airlines 7 2026-05-21
CHH7488 Hainan Airlines 4 2026-06-18
CHH7322 - 4 2026-07-06
CHH7054 Hainan Airlines 4 2026-05-27
CHH7053 Hainan Airlines 4 2026-04-27
CHH7813 Hainan Airlines 3 2026-06-10
CHH7468 Hainan Airlines 3 2026-05-26
CHH7759 Hainan Airlines 2 2026-05-21
CHH7735 Hainan Airlines 2 2026-05-16
CHH7726 - 2 2026-07-05
CHH7725 - 2 2026-07-05
CHH7715 Hainan Airlines 2 2026-05-18
CHH7467 Hainan Airlines 2 2026-04-15
CHH460 - 2 2026-07-12
CHH7873 Hainan Airlines 1 2026-05-13
CHH7872 Hainan Airlines 1 2026-05-24
CHH7871 Hainan Airlines 1 2026-05-24
CHH7869 Hainan Airlines 1 2026-05-14
CHH7767 Hainan Airlines 1 2026-05-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CHH747 - Jul 14, 02:10 UTCJul 14, 02:35 UTC25m
2026-07-13 CHH6258 - Jul 13, 06:50 UTCJul 13, 07:05 UTC15m
2026-07-12 CHH460 - Jul 12, 09:05 UTCJul 13, 07:05 UTC22h 0m
2026-07-12 CHH460 - Jul 12, 08:55 UTCJul 13, 07:01 UTC22h 5m
2026-07-11 CHH459 - Jul 11, 11:15 UTCJul 12, 07:01 UTC19h 45m
2026-07-08 CHH7210 - Jul 8, 06:45 UTCJul 8, 11:05 UTC4h 20m
2026-07-06 CHH7322 - Jul 6, 23:40 UTCJul 7, 00:55 UTC1h 15m
2026-07-06 CHH7322 - Jul 6, 04:45 UTCJul 7, 00:55 UTC20h 10m
2026-07-05 CHH7322 - Jul 5, 23:45 UTCJul 6, 04:55 UTC5h 10m
2026-07-05 CHH7725 - Jul 5, 04:45 UTCJul 5, 04:55 UTC10m
2026-07-05 CHH7726 - Jul 5, 01:25 UTCJul 5, 02:00 UTC35m
2026-07-04 CHH7322 - Jul 4, 02:50 UTCJul 4, 06:40 UTC3h 50m
2026-07-03 CHH7725 - Jul 3, 07:50 UTCJul 3, 08:00 UTC10m
2026-07-03 CHH7726 - Jul 3, 00:40 UTCJul 3, 01:00 UTC20m
2026-07-02 CHH7119 - Jul 2, 06:15 UTCJul 2, 06:25 UTC10m
2026-06-30 CHH7319 - Jun 30, 14:00 UTCJul 1, 03:10 UTC13h 10m
2026-06-23 CHH7308 - Jun 23, 00:24 UTCJun 23, 04:35 UTC4h 10m
2026-06-18 CHH7488 CGQ → HGH Jun 18, 14:40 UTCJun 19, 06:10 UTC15h 29m
2026-06-18 CHH7488 CGQ → HGH Jun 18, 06:55 UTCJun 19, 03:09 UTC20h 14m
2026-06-10 CHH7813 PEK → CAN Jun 10, 11:45 UTCJun 10, 12:00 UTC15m
2026-06-10 CHH7235 CAN → CGO Jun 10, 03:10 UTCJun 10, 03:30 UTC20m
2026-06-09 CHH7707 PEK → SZX Jun 9, 06:05 UTCJun 9, 06:20 UTC15m
2026-06-08 CHH7441 CAN → CKG Jun 8, 09:20 UTCJun 8, 09:30 UTC10m
2026-06-03 CHH7204 SZX → TSN Jun 3, 13:40 UTCJun 3, 13:50 UTC10m
2026-06-03 CHH7228 ZUH → CGO Jun 3, 03:35 UTCJun 3, 04:00 UTC25m
2026-06-02 CHH7813 PEK → CAN Jun 2, 12:10 UTCJun 2, 12:30 UTC20m
2026-06-01 CHH7512 ZUH → XIY Jun 1, 03:55 UTCJun 1, 04:10 UTC15m
2026-05-27 CHH7054 HGH → HAK May 27, 02:44 UTCMay 27, 02:59 UTC15m
2026-05-26 CHH7468 ZUH → HGH May 26, 10:29 UTCMay 26, 10:44 UTC15m
2026-05-25 CHH7468 ZUH → HGH May 25, 09:30 UTCMay 25, 09:40 UTC10m
2026-05-24 CHH7872 SZX → XIY May 24, 05:15 UTCMay 24, 05:30 UTC15m
2026-05-24 CHH7871 XIY → SZX May 24, 03:20 UTCMay 24, 03:30 UTC10m
2026-05-22 CHH7874 SZX → XIY May 22, 09:05 UTCMay 22, 09:15 UTC10m
2026-05-21 CHH7870 SZX → XIY May 21, 23:50 UTCMay 22, 00:00 UTC10m
2026-05-21 CHH7759 SZX → TNA May 21, 09:15 UTCMay 21, 17:40 UTC8h 25m
2026-05-21 CHH7759 SZX → TNA May 21, 06:55 UTCMay 21, 07:05 UTC10m
2026-05-20 CHH7874 SZX → XIY May 20, 09:35 UTCMay 20, 09:45 UTC10m
2026-05-20 CHH7394 HGH → SZX May 20, 05:55 UTCMay 20, 06:10 UTC15m
2026-05-20 CHH7393 SZX → HGH May 20, 01:00 UTCMay 20, 01:10 UTC10m
2026-05-19 CHH7874 SZX → XIY May 19, 09:00 UTCMay 19, 09:10 UTC10m
2026-05-18 CHH7767 SZX → KMG May 18, 23:50 UTCMay 19, 00:10 UTC20m
2026-05-18 CHH7715 SZX → TNA May 18, 16:35 UTCMay 18, 16:45 UTC10m
2026-05-18 CHH7715 SZX → TNA May 18, 13:40 UTCMay 18, 14:00 UTC20m
2026-05-18 CHH7710 SZX → PEK May 18, 09:35 UTCMay 18, 09:45 UTC10m
2026-05-17 CHH7870 SZX → XIY May 17, 23:50 UTCMay 18, 00:00 UTC10m
2026-05-17 CHH7275 SZX → TFU May 17, 06:20 UTCMay 17, 06:30 UTC10m
2026-05-16 CHH7735 SZX → CGO May 16, 22:25 UTCMay 16, 22:40 UTC15m
2026-05-16 CHH7874 SZX → XIY May 16, 09:06 UTCMay 16, 09:16 UTC10m
2026-05-15 CHH7870 SZX → XIY May 15, 23:45 UTCMay 16, 00:00 UTC15m
2026-05-15 CHH7874 SZX → XIY May 15, 09:00 UTCMay 15, 09:10 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-1372 page for operator, model, and routing details .

Mode-S 7812E4 frequently asked

What is Mode-S code 7812E4?
7812E4 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1372.
Where is Mode-S 7812E4 registered?
Mode-S code 7812E4 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7812E4 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7812E4, octal 36011344, decimal 7,869,156.
What flights does 7812E4 operate?
Mode-S 7812E4 has broadcast 20 distinct callsigns, including CHH7874, CHH7870, CHH7488, CHH7322, CHH7054.