Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

7817CE

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-20DN · BOEING 737 MAX 8

Hex
7817CE
Octal
36013716
Decimal
7,870,414
Country
CN
Tail
B-20DN
Type
B38M
No current signal · last broadcast Jul 26, 16:30 UTC
Flights observed
324
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 16:30 UTC

Last known position

Most recent position reported by Mode-S 7817CE.

Country allocation

The ICAO 24-bit address 7817CE 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
CSZ662 - 28 2026-07-10
CSZ661 - 26 2026-07-10
CSZ652 - 26 2026-07-09
CSZ651 - 24 2026-07-09
CSZ240 - 17 2026-07-07
CSZ239 - 17 2026-07-07
CSZ9918 - 13 2026-07-20
CSZ117 - 12 2026-07-05
CSZ9924 - 11 2026-07-09
CSZ9917 - 8 2026-07-20
CSZ118 - 8 2026-07-05
CSZ9852 - 7 2026-07-14
CSZ9604 Shenzhen Airlines 7 2026-07-26
CSZ9145 Shenzhen Airlines 7 2026-07-24
CSZ9923 - 6 2026-07-08
CSZ9146 Shenzhen Airlines 6 2026-07-24
CSZ330 - 6 2026-06-29
CSZ329 - 6 2026-06-29
CSZ9137 Shenzhen Airlines 5 2026-07-25
CSZ8938 - 5 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSZ9604 SHE → SZX Jul 26, 16:15 UTCJul 26, 16:30 UTC15m
2026-07-26 CSZ9604 SHE → SZX Jul 26, 13:40 UTCJul 26, 13:55 UTC15m
2026-07-25 CSZ9138 SJW → SZX Jul 25, 05:50 UTCJul 25, 06:10 UTC20m
2026-07-25 CSZ9138 SJW → SZX Jul 25, 03:25 UTCJul 25, 03:45 UTC20m
2026-07-25 CSZ9137 SZX → SJW Jul 25, 01:20 UTCJul 25, 01:40 UTC20m
2026-07-24 CSZ9137 SZX → SJW Jul 24, 23:30 UTCJul 24, 23:40 UTC10m
2026-07-24 CSZ9146 SJW → SZX Jul 24, 15:30 UTCJul 24, 15:50 UTC20m
2026-07-24 CSZ9146 SJW → SZX Jul 24, 13:00 UTCJul 24, 13:20 UTC20m
2026-07-24 CSZ9145 SZX → SJW Jul 24, 11:20 UTCJul 24, 11:35 UTC15m
2026-07-24 CSZ9145 SZX → SJW Jul 24, 09:15 UTCJul 24, 09:30 UTC15m
2026-07-24 CSZ8128 PEK → SZX Jul 24, 05:00 UTCJul 24, 05:20 UTC20m
2026-07-24 CSZ8127 SZX → PEK Jul 24, 00:05 UTCJul 24, 00:15 UTC10m
2026-07-23 CSZ9604 SHE → SZX Jul 23, 16:25 UTCJul 23, 16:50 UTC25m
2026-07-23 CSZ9604 SHE → SZX Jul 23, 10:10 UTCJul 23, 14:00 UTC3h 50m
2026-07-23 CSZ9603 - Jul 23, 07:50 UTCJul 23, 08:00 UTC10m
2026-07-23 CSZ9138 SJW → SZX Jul 23, 05:50 UTCJul 23, 06:15 UTC25m
2026-07-22 CSZ9137 SZX → SJW Jul 22, 23:30 UTCJul 22, 23:40 UTC10m
2026-07-22 CSZ9126 TSN → SZX Jul 22, 16:40 UTCJul 22, 17:05 UTC25m
2026-07-22 CSZ9126 TSN → SZX Jul 22, 13:55 UTCJul 22, 14:20 UTC25m
2026-07-22 CSZ8965 SZX → NGB Jul 22, 01:15 UTCJul 22, 01:25 UTC10m
2026-07-21 CSZ8968 NGB → SZX Jul 21, 13:55 UTCJul 21, 15:05 UTC1h 10m
2026-07-21 CSZ8920 YNT → SZX Jul 21, 07:10 UTCJul 21, 08:30 UTC1h 20m
2026-07-21 CSZ8919 - Jul 21, 01:45 UTCJul 21, 01:55 UTC10m
2026-07-20 CSZ9145 SZX → SJW Jul 20, 12:10 UTCJul 20, 12:20 UTC10m
2026-07-20 CSZ9918 - Jul 20, 09:25 UTCJul 20, 10:35 UTC1h 10m
2026-07-20 CSZ9917 - Jul 20, 02:40 UTCJul 20, 02:50 UTC10m
2026-07-19 CSZ9146 SJW → SZX Jul 19, 15:40 UTCJul 19, 15:50 UTC10m
2026-07-19 CSZ9145 SZX → SJW Jul 19, 09:25 UTCJul 19, 09:35 UTC10m
2026-07-19 CSZ9138 SJW → SZX Jul 19, 06:30 UTCJul 19, 06:50 UTC20m
2026-07-18 CSZ9137 SZX → SJW Jul 18, 23:20 UTCJul 18, 23:30 UTC10m
2026-07-18 CSZ9146 SJW → SZX Jul 18, 15:30 UTCJul 18, 16:00 UTC30m
2026-07-18 CSZ9145 SZX → SJW Jul 18, 09:25 UTCJul 18, 09:35 UTC10m
2026-07-18 CSZ8920 - Jul 18, 07:05 UTCJul 18, 07:15 UTC10m
2026-07-18 CSZ8919 - Jul 18, 00:10 UTCJul 18, 00:19 UTC10m
2026-07-17 CSZ9128 - Jul 17, 18:34 UTCJul 17, 19:09 UTC35m
2026-07-17 CSZ9127 SZX → HET Jul 17, 11:45 UTCJul 17, 11:55 UTC10m
2026-07-17 CSZ9918 - Jul 17, 09:45 UTCJul 17, 10:40 UTC55m
2026-07-17 CSZ9917 - Jul 17, 03:30 UTCJul 17, 03:39 UTC10m
2026-07-16 CSZ9146 - Jul 16, 16:35 UTCJul 16, 16:55 UTC20m
2026-07-16 CSZ9145 - Jul 16, 09:50 UTCJul 16, 10:00 UTC10m
2026-07-16 CSZ9916 - Jul 16, 07:50 UTCJul 16, 08:30 UTC40m
2026-07-16 CSZ9915 - Jul 16, 00:15 UTCJul 16, 00:25 UTC10m
2026-07-15 CSZ9604 - Jul 15, 12:10 UTCJul 15, 15:25 UTC3h 15m
2026-07-15 CSZ9603 - Jul 15, 09:50 UTCJul 15, 10:00 UTC10m
2026-07-15 CSZ9402 - Jul 15, 07:25 UTCJul 15, 07:50 UTC25m
2026-07-15 CSZ9401 - Jul 15, 00:00 UTCJul 15, 00:15 UTC15m
2026-07-14 CSZ9852 - Jul 14, 15:00 UTCJul 14, 15:15 UTC15m
2026-07-10 CSZ9855 - Jul 10, 13:20 UTCJul 10, 13:30 UTC10m
2026-07-10 CSZ662 - Jul 10, 11:40 UTCJul 10, 11:50 UTC10m
2026-07-10 CSZ662 - Jul 10, 08:20 UTCJul 10, 09:15 UTC55m

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-20DN page for operator, model, and routing details .

Mode-S 7817CE frequently asked

What is Mode-S code 7817CE?
7817CE is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-20DN.
Where is Mode-S 7817CE registered?
Mode-S code 7817CE is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7817CE broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 16:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7817CE, octal 36013716, decimal 7,870,414.
What flights does 7817CE operate?
Mode-S 7817CE has broadcast 20 distinct callsigns, including CSZ662, CSZ661, CSZ652, CSZ651, CSZ240.