Apparatus

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sensors Mode-S transponder

7813BB

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1091 · AIRBUS A-321neo

Hex
7813BB
Octal
36011673
Decimal
7,869,371
Country
CN
Tail
B-1091
Type
A21N
No current signal · last broadcast 2h ago
Flights observed
152
Distinct callsigns
20
Country
CN
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 7813BB.

Country allocation

The ICAO 24-bit address 7813BB 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
CSN352 - 17 2026-07-10
CSN351 - 13 2026-07-09
CSN5015 - 10 2026-07-06
CSN340 - 9 2026-07-13
CSN339 - 9 2026-07-12
CSN357 - 8 2026-06-18
CSN8099 - 7 2026-06-27
CSN5016 - 7 2026-07-06
CSN358 - 7 2026-06-18
CSN8100 - 6 2026-06-27
CSN3040 - 6 2026-07-14
CSN6342 - 5 2026-07-16
CSN3062 - 5 2026-07-04
CSN3061 - 5 2026-07-04
CSN6378 - 4 2026-07-17
CSN364 - 4 2026-06-24
CSN363 - 4 2026-06-24
CSN3039 - 4 2026-07-14
CSN362 China Southern Airlines 3 2026-07-01
CSN361 China Southern Airlines 3 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CSN6378 - Jul 17, 03:20 UTCJul 18, 01:25 UTC22h 5m
2026-07-16 CSN6378 - Jul 16, 12:30 UTCJul 17, 07:35 UTC19h 5m
2026-07-16 CSN6378 - Jul 16, 08:50 UTCJul 17, 07:35 UTC22h 45m
2026-07-16 CSN6342 - Jul 16, 08:30 UTCJul 17, 03:39 UTC19h 10m
2026-07-16 CSN6342 - Jul 16, 01:10 UTCJul 16, 12:40 UTC11h 30m
2026-07-15 CSN6342 - Jul 15, 14:50 UTCJul 16, 12:40 UTC21h 50m
2026-07-15 CSN6342 - Jul 15, 14:40 UTCJul 16, 12:40 UTC22h 0m
2026-07-15 CSN6851 - Jul 15, 07:20 UTCJul 16, 01:20 UTC18h 0m
2026-07-15 CSN6378 - Jul 15, 03:10 UTCJul 16, 01:20 UTC22h 10m
2026-07-14 CSN3040 - Jul 14, 13:40 UTCJul 14, 13:55 UTC15m
2026-07-14 CSN3040 - Jul 14, 10:25 UTCJul 14, 10:45 UTC20m
2026-07-14 CSN3039 - Jul 14, 08:30 UTCJul 14, 09:00 UTC30m
2026-07-14 CSN3039 - Jul 14, 05:35 UTCJul 14, 05:45 UTC10m
2026-07-13 CSN340 - Jul 13, 01:01 UTCJul 13, 01:45 UTC45m
2026-07-12 CSN339 - Jul 12, 12:05 UTCJul 12, 12:45 UTC40m
2026-07-10 CSN6342 - Jul 10, 08:25 UTCJul 10, 08:40 UTC15m
2026-07-10 CSN352 - Jul 10, 03:40 UTCJul 10, 04:10 UTC30m
2026-07-10 CSN352 - Jul 10, 00:30 UTCJul 10, 00:55 UTC25m
2026-07-09 CSN351 - Jul 9, 14:45 UTCJul 9, 15:05 UTC20m
2026-07-09 CSN8988 - Jul 9, 02:40 UTCJul 9, 07:20 UTC4h 40m
2026-07-06 CSN5016 - Jul 6, 07:25 UTCJul 6, 08:15 UTC50m
2026-07-06 CSN5015 - Jul 6, 03:20 UTCJul 6, 05:50 UTC2h 30m
2026-07-06 CSN5015 - Jul 6, 02:30 UTCJul 6, 02:40 UTC10m
2026-07-04 CSN3062 - Jul 4, 09:20 UTCJul 4, 09:55 UTC35m
2026-07-04 CSN3061 - Jul 4, 07:25 UTCJul 4, 08:05 UTC40m
2026-07-03 CSN6499 - Jul 3, 10:25 UTCJul 3, 10:40 UTC15m
2026-07-02 CSN3905 - Jul 2, 14:50 UTCJul 3, 02:30 UTC11h 40m
2026-07-01 CSN3623 - Jul 1, 09:30 UTCJul 1, 14:10 UTC4h 40m
2026-07-01 CSN362 BKK → CAN Jul 1, 01:35 UTCJul 1, 03:00 UTC1h 25m
2026-06-30 CSN361 CAN → BKK Jun 30, 14:45 UTCJun 30, 15:15 UTC30m
2026-06-30 CSN5016 - Jun 30, 07:30 UTCJun 30, 08:35 UTC1h 5m
2026-06-30 CSN5015 - Jun 30, 04:25 UTCJun 30, 05:40 UTC1h 15m
2026-06-30 CSN5015 - Jun 30, 02:20 UTCJun 30, 02:30 UTC10m
2026-06-28 CSN3407 - Jun 28, 07:29 UTCJun 28, 08:14 UTC45m
2026-06-28 CSN352 - Jun 28, 00:30 UTCJun 28, 00:55 UTC25m
2026-06-27 CSN351 - Jun 27, 14:39 UTCJun 27, 15:00 UTC20m
2026-06-27 CSN351 - Jun 27, 11:50 UTCJun 27, 11:59 UTC10m
2026-06-27 CSN8100 - Jun 27, 06:50 UTCJun 27, 08:29 UTC1h 40m
2026-06-27 CSN8099 - Jun 27, 03:04 UTCJun 27, 05:04 UTC2h 0m
2026-06-25 CSN5016 - Jun 25, 09:25 UTCJun 25, 10:15 UTC50m
2026-06-25 CSN5015 - Jun 25, 04:49 UTCJun 25, 08:04 UTC3h 15m
2026-06-24 CSN364 - Jun 24, 12:04 UTCJun 24, 13:44 UTC1h 40m
2026-06-24 CSN363 - Jun 24, 08:14 UTCJun 24, 10:14 UTC2h 0m
2026-06-23 CSN364 - Jun 23, 12:05 UTCJun 23, 13:34 UTC1h 30m
2026-06-23 CSN363 - Jun 23, 08:25 UTCJun 23, 10:29 UTC2h 5m
2026-06-22 CSN3449 - Jun 22, 08:04 UTCJun 22, 11:30 UTC3h 25m
2026-06-22 CSN352 - Jun 22, 03:14 UTCJun 22, 03:30 UTC15m
2026-06-22 CSN352 - Jun 22, 00:10 UTCJun 22, 00:34 UTC25m
2026-06-21 CSN351 - Jun 21, 14:30 UTCJun 21, 14:59 UTC30m
2026-06-21 CSN8100 - Jun 21, 06:55 UTCJun 21, 08:35 UTC1h 40m

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-1091 page for operator, model, and routing details .

Mode-S 7813BB frequently asked

What is Mode-S code 7813BB?
7813BB is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1091.
Where is Mode-S 7813BB registered?
Mode-S code 7813BB is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7813BB broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7813BB, octal 36011673, decimal 7,869,371.
What flights does 7813BB operate?
Mode-S 7813BB has broadcast 20 distinct callsigns, including CSN352, CSN351, CSN5015, CSN340, CSN339.