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 Jul 26, 09:35 UTC
Flights observed
100
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 09:35 UTC

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
CHH748 - 2 2026-07-20
CHH747 Hainan Airlines 2 2026-07-20
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CHH7435 HGH → HET Jul 26, 09:20 UTCJul 26, 09:35 UTC15m
2026-07-25 CHH6359 PEK → HRB Jul 25, 23:15 UTCJul 25, 23:25 UTC10m
2026-07-25 CHH7236 CSX → PEK Jul 25, 09:55 UTCJul 25, 10:10 UTC15m
2026-07-24 CHH7798 TSN → CSX Jul 24, 08:25 UTCJul 24, 08:45 UTC20m
2026-07-22 CHH7535 - Jul 22, 15:30 UTCJul 22, 16:05 UTC35m
2026-07-21 CHH6394 - Jul 21, 15:10 UTCJul 21, 15:20 UTC10m
2026-07-20 CHH748 - Jul 20, 04:25 UTCJul 20, 14:30 UTC10h 5m
2026-07-20 CHH747 HAK → SIN Jul 20, 02:35 UTCJul 20, 03:00 UTC25m
2026-07-19 CHH7004 - Jul 19, 00:35 UTCJul 19, 00:50 UTC15m
2026-07-18 CHH7668 - Jul 18, 05:00 UTCJul 18, 09:30 UTC4h 30m
2026-07-17 CHH6034 - Jul 17, 13:35 UTCJul 17, 14:15 UTC40m
2026-07-17 CHH6033 - Jul 17, 10:40 UTCJul 17, 10:55 UTC15m
2026-07-17 - - Jul 17, 05:10 UTCJul 17, 05:20 UTC10m
2026-07-15 CHH7320 - Jul 15, 02:30 UTCJul 15, 02:40 UTC10m
2026-07-14 CHH748 - Jul 14, 04:10 UTCJul 14, 12:55 UTC8h 45m
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

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 Jul 26, 09:35 UTC.
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.