Apparatus

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sensors Mode-S transponder

7817BB

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-30AP · AIRBUS A-320neo

Hex
7817BB
Octal
36013673
Decimal
7,870,395
Country
CN
Tail
B-30AP
Type
A20N
No current signal · last broadcast 7h ago
Flights observed
132
Distinct callsigns
20
Country
CN
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 7817BB.

Country allocation

The ICAO 24-bit address 7817BB 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
CSZ9747 - 10 2026-07-13
CSZ8983 - 10 2026-07-14
CSZ9455 - 7 2026-06-16
CSZ9748 - 6 2026-07-13
CSZ9606 - 6 2026-07-10
CSZ9301 - 6 2026-06-14
CSZ9235 - 6 2026-06-19
CSZ8984 - 4 2026-07-14
CSZ8903 - 4 2026-07-19
CSZ9635 Shenzhen Airlines 3 2026-05-12
CSZ9302 Shenzhen Airlines 3 2026-06-14
CSZ9239 - 3 2026-06-19
CSZ9962 - 2 2026-06-30
CSZ9623 - 2 2026-07-11
CSZ9616 - 2 2026-05-13
CSZ9615 - 2 2026-05-13
CSZ9605 Shenzhen Airlines 2 2026-06-07
CSZ9467 Shenzhen Airlines 2 2026-06-13
CSZ9465 Shenzhen Airlines 2 2026-06-01
CSZ9457 Shenzhen Airlines 2 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-19 CSZ9534 ZUH → WUX Jul 19, 15:15 UTCJul 19, 15:25 UTC10m
2026-07-19 CSZ8903 - Jul 19, 00:15 UTCJul 19, 00:25 UTC10m
2026-07-16 CSZ8424 - Jul 16, 10:40 UTCJul 16, 10:50 UTC10m
2026-07-16 CSZ8423 - Jul 16, 06:05 UTCJul 16, 06:20 UTC15m
2026-07-15 CSZ9415 - Jul 15, 14:30 UTCJul 15, 14:40 UTC10m
2026-07-15 CSZ9122 - Jul 15, 12:35 UTCJul 15, 12:50 UTC15m
2026-07-14 CSZ8984 - Jul 14, 14:10 UTCJul 14, 14:20 UTC10m
2026-07-14 CSZ8983 - Jul 14, 08:15 UTCJul 14, 08:25 UTC10m
2026-07-14 CSZ9624 - Jul 14, 05:10 UTCJul 14, 05:30 UTC20m
2026-07-13 CSZ9748 - Jul 13, 13:20 UTCJul 14, 02:55 UTC13h 35m
2026-07-13 CSZ9747 - Jul 13, 01:35 UTCJul 13, 01:45 UTC10m
2026-07-12 CSZ9748 - Jul 12, 06:35 UTCJul 12, 13:25 UTC6h 50m
2026-07-12 CSZ9747 - Jul 12, 01:45 UTCJul 12, 02:05 UTC20m
2026-07-11 CSZ9623 - Jul 11, 09:50 UTCJul 11, 10:10 UTC20m
2026-07-11 CSZ9930 - Jul 11, 08:05 UTCJul 11, 08:25 UTC20m
2026-07-11 CSZ9929 - Jul 11, 01:00 UTCJul 11, 01:15 UTC15m
2026-07-10 CSZ9126 - Jul 10, 16:00 UTCJul 10, 16:15 UTC15m
2026-07-10 CSZ9125 - Jul 10, 07:15 UTCJul 10, 07:35 UTC20m
2026-07-10 CSZ9606 - Jul 10, 05:35 UTCJul 10, 06:00 UTC25m
2026-07-09 CSZ9606 - Jul 9, 15:45 UTCJul 10, 03:30 UTC11h 45m
2026-07-09 CSZ8309 - Jul 9, 11:55 UTCJul 9, 12:05 UTC10m
2026-07-04 CSZ8565 - Jul 4, 06:55 UTCJul 5, 02:15 UTC19h 20m
2026-07-04 CSZ8565 - Jul 4, 02:25 UTCJul 4, 02:40 UTC15m
2026-07-02 CSZ9672 - Jul 2, 09:40 UTCJul 2, 14:10 UTC4h 30m
2026-07-02 CSZ8944 - Jul 2, 04:40 UTCJul 2, 04:50 UTC10m
2026-07-01 CSZ8903 - Jul 1, 00:50 UTCJul 1, 04:25 UTC3h 35m
2026-06-30 CSZ9962 - Jun 30, 00:09 UTCJun 30, 00:25 UTC15m
2026-06-27 CSZ9974 CTU → SZX Jun 27, 14:20 UTCJun 27, 14:29 UTC10m
2026-06-27 CSZ8903 CAN → CGO Jun 27, 00:05 UTCJun 27, 04:24 UTC4h 20m
2026-06-26 CSZ9978 TNA → CAN Jun 26, 18:20 UTCJun 26, 18:29 UTC10m
2026-06-25 CSZ9748 - Jun 25, 11:04 UTCJun 25, 15:40 UTC4h 35m
2026-06-25 CSZ9747 - Jun 25, 07:45 UTCJun 25, 08:09 UTC25m
2026-06-25 CSZ9747 - Jun 25, 01:24 UTCJun 25, 01:40 UTC15m
2026-06-24 CSZ9747 - Jun 24, 06:04 UTCJun 24, 13:44 UTC7h 40m
2026-06-24 CSZ9747 - Jun 24, 01:34 UTCJun 24, 01:44 UTC10m
2026-06-23 CSZ9748 - Jun 23, 06:59 UTCJun 23, 13:34 UTC6h 35m
2026-06-23 CSZ9747 - Jun 23, 01:50 UTCJun 23, 01:59 UTC10m
2026-06-22 CSZ9748 - Jun 22, 09:14 UTCJun 22, 13:25 UTC4h 10m
2026-06-22 CSZ9747 - Jun 22, 06:39 UTCJun 22, 06:54 UTC15m
2026-06-22 CSZ9747 - Jun 22, 01:49 UTCJun 22, 02:04 UTC15m
2026-06-21 CSZ9748 - Jun 21, 06:29 UTCJun 21, 13:15 UTC6h 45m
2026-06-21 CSZ9747 - Jun 21, 01:49 UTCJun 21, 01:59 UTC10m
2026-06-20 CSZ9623 - Jun 20, 09:44 UTCJun 20, 12:19 UTC2h 35m
2026-06-19 CSZ9235 - Jun 19, 23:00 UTCJun 19, 23:19 UTC20m
2026-06-19 CSZ9239 - Jun 19, 05:00 UTCJun 19, 05:14 UTC15m
2026-06-18 CSZ9204 - Jun 18, 12:40 UTCJun 18, 12:50 UTC10m
2026-06-16 CSZ9213 - Jun 16, 14:20 UTCJun 16, 14:35 UTC15m
2026-06-16 CSZ9455 - Jun 16, 05:00 UTCJun 16, 05:10 UTC10m
2026-06-16 CSZ9455 - Jun 16, 04:10 UTCJun 16, 04:25 UTC15m
2026-06-15 CSZ9456 - Jun 15, 14:10 UTCJun 15, 14:20 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-30AP page for operator, model, and routing details .

Mode-S 7817BB frequently asked

What is Mode-S code 7817BB?
7817BB is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-30AP.
Where is Mode-S 7817BB registered?
Mode-S code 7817BB is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7817BB broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7817BB, octal 36013673, decimal 7,870,395.
What flights does 7817BB operate?
Mode-S 7817BB has broadcast 20 distinct callsigns, including CSZ9747, CSZ8983, CSZ9455, CSZ9748, CSZ9606.