Apparatus

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sensors Mode-S transponder

7818F4

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-30E5 · AIRBUS A-321neo

Hex
7818F4
Octal
36014364
Decimal
7,870,708
Country
CN
Tail
B-30E5
Type
A21N
No current signal · last broadcast 6h ago
Flights observed
48
Distinct callsigns
20
Country
CN
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 7818F4.

Country allocation

The ICAO 24-bit address 7818F4 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
CSN5437 - 4 2026-07-07
CSN3193 - 4 2026-06-25
CSN6714 China Southern Airlines 3 2026-06-22
CSN3194 - 3 2026-06-25
CSN8849 - 2 2026-07-14
CSN6081 - 2 2026-06-21
CSN5438 - 2 2026-07-01
CSN318 China Southern Airlines 2 2026-04-18
CSN316 China Southern Airlines 2 2026-05-18
CSN8996 China Southern Airlines 1 2026-06-12
CSN8995 China Southern Airlines 1 2026-06-11
CSN8922 - 1 2026-07-05
CSN8910 - 1 2026-06-27
CSN8909 China Southern Airlines 1 2026-06-20
CSN8869 China Southern Airlines 1 2026-05-22
CSN8852 - 1 2026-07-13
CSN8851 - 1 2026-07-12
CSN8568 China Southern Airlines 1 2026-07-10
CSN8144 China Southern Airlines 1 2026-07-03
CSN6915 - 1 2026-07-17

Recent flights last 48

DateFlightRouteTakeoffLandingDuration
2026-07-18 CSN5010 - Jul 18, 00:35 UTCJul 18, 00:55 UTC20m
2026-07-17 CSN5009 - Jul 17, 13:45 UTCJul 17, 14:30 UTC45m
2026-07-17 CSN6915 - Jul 17, 08:04 UTCJul 17, 08:15 UTC10m
2026-07-16 CSN6906 - Jul 16, 12:25 UTCJul 16, 12:40 UTC15m
2026-07-14 CSN8849 - Jul 14, 11:20 UTCJul 14, 11:40 UTC20m
2026-07-14 CSN3902 - Jul 14, 08:25 UTCJul 14, 08:35 UTC10m
2026-07-13 CSN8852 - Jul 13, 03:20 UTCJul 13, 03:30 UTC10m
2026-07-12 CSN8851 - Jul 12, 12:50 UTCJul 12, 13:01 UTC10m
2026-07-11 CSN3903 - Jul 11, 07:45 UTCJul 11, 07:55 UTC10m
2026-07-10 CSN8568 KMG → PKX Jul 10, 15:00 UTCJul 10, 15:15 UTC15m
2026-07-07 CSN5437 - Jul 7, 01:35 UTCJul 7, 01:50 UTC15m
2026-07-05 CSN8922 - Jul 5, 06:55 UTCJul 5, 07:10 UTC15m
2026-07-04 CSN5437 - Jul 4, 02:10 UTCJul 4, 14:40 UTC12h 30m
2026-07-03 CSN8144 TBS → URC Jul 3, 04:00 UTCJul 3, 04:15 UTC15m
2026-07-01 CSN5438 - Jul 1, 11:20 UTCJul 1, 11:30 UTC10m
2026-07-01 CSN5437 - Jul 1, 01:50 UTCJul 1, 02:15 UTC25m
2026-06-27 CSN3997 - Jun 27, 12:34 UTCJun 27, 13:24 UTC50m
2026-06-27 CSN8910 - Jun 27, 04:34 UTCJun 27, 07:49 UTC3h 15m
2026-06-25 CSN3193 - Jun 25, 05:35 UTCJun 25, 05:44 UTC10m
2026-06-25 CSN3194 - Jun 25, 03:44 UTCJun 25, 03:54 UTC10m
2026-06-23 CSN6903 - Jun 23, 09:34 UTCJun 23, 09:45 UTC10m
2026-06-22 CSN6714 PKX → SYX Jun 22, 09:40 UTCJun 22, 12:54 UTC3h 15m
2026-06-21 CSN6082 - Jun 21, 08:35 UTCJun 21, 08:49 UTC15m
2026-06-21 CSN6081 - Jun 21, 06:04 UTCJun 21, 06:29 UTC25m
2026-06-20 CSN6081 - Jun 20, 07:54 UTCJun 21, 06:29 UTC22h 35m
2026-06-20 CSN8909 PKX → SYX Jun 20, 04:39 UTCJun 20, 07:54 UTC3h 15m
2026-06-13 CSN5903 - Jun 13, 00:55 UTCJun 13, 01:05 UTC10m
2026-06-12 CSN8996 AAT → PKX Jun 12, 07:55 UTCJun 12, 08:20 UTC25m
2026-06-11 CSN8995 PKX → AAT Jun 11, 23:15 UTCJun 11, 23:40 UTC25m
2026-06-10 CSN8849 PKX → CTU Jun 10, 13:20 UTCJun 10, 13:35 UTC15m
2026-06-07 CSN6714 PKX → SYX Jun 7, 09:50 UTCJun 7, 12:55 UTC3h 5m
2026-05-22 CSN8869 PKX → KMG May 22, 04:35 UTCMay 22, 04:45 UTC10m
2026-05-18 CSN316 ICN → PKX May 18, 00:45 UTCMay 18, 01:10 UTC25m
2026-05-17 CSN315 PKX → ICN May 17, 12:30 UTCMay 17, 12:50 UTC20m
2026-05-10 CSN316 ICN → PKX May 10, 00:45 UTCMay 10, 01:00 UTC15m
2026-05-08 CSN3193 SZX → PKX May 8, 04:54 UTCMay 8, 05:05 UTC10m
2026-05-08 CSN3194 PKX → SZX May 8, 02:39 UTCMay 8, 02:55 UTC15m
2026-05-07 CSN5098 ALA → PKX May 7, 21:30 UTCMay 7, 21:45 UTC15m
2026-05-07 CSN5097 PKX → ALA May 7, 11:00 UTCMay 7, 11:25 UTC25m
2026-05-05 CSN5438 - May 5, 09:30 UTCMay 5, 09:45 UTC15m
2026-05-05 CSN5437 - May 5, 00:30 UTCMay 5, 00:50 UTC20m
2026-04-26 CSN3193 SZX → PKX Apr 26, 04:45 UTCApr 26, 04:55 UTC10m
2026-04-26 CSN3194 PKX → SZX Apr 26, 02:40 UTCApr 26, 03:00 UTC20m
2026-04-21 CSN3193 SZX → PKX Apr 21, 04:40 UTCApr 21, 04:55 UTC15m
2026-04-19 CSN6714 PKX → SYX Apr 19, 07:15 UTCApr 19, 07:30 UTC15m
2026-04-18 CSN318 GMP → PKX Apr 18, 04:45 UTCApr 18, 05:00 UTC15m
2026-04-18 CSN318 GMP → PKX Apr 18, 04:40 UTCApr 18, 05:00 UTC20m
2026-04-18 CSN317 PKX → GMP Apr 18, 02:40 UTCApr 18, 03:05 UTC25m

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-30E5 page for operator, model, and routing details .

Mode-S 7818F4 frequently asked

What is Mode-S code 7818F4?
7818F4 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-30E5.
Where is Mode-S 7818F4 registered?
Mode-S code 7818F4 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7818F4 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7818F4, octal 36014364, decimal 7,870,708.
What flights does 7818F4 operate?
Mode-S 7818F4 has broadcast 20 distinct callsigns, including CSN5437, CSN3193, CSN6714, CSN3194, CSN8849.