Apparatus

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sensors Mode-S transponder

7817F7

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-30C6 · AIRBUS A-321neo

Hex
7817F7
Octal
36013767
Decimal
7,870,455
Country
CN
Tail
B-30C6
Type
A21N
No current signal · last broadcast 10h ago
Flights observed
50
Distinct callsigns
20
Country
CN
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S 7817F7.

Country allocation

The ICAO 24-bit address 7817F7 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
CCA4338 Air China 8 2026-06-05
CCA4102 - 7 2026-07-05
CCA4336 - 6 2026-07-17
CCA4110 Air China 4 2026-06-05
CCA4326 - 3 2026-07-13
CCA4337 Air China 2 2026-05-19
CCA4335 Air China 2 2026-06-07
CCA4324 - 2 2026-07-14
CCA4312 Air China 2 2026-04-30
CCA4120 - 2 2026-07-09
CCA4068 Air China 2 2026-07-20
CCA4035 - 2 2026-07-01
CCA4311 Air China 1 2026-04-24
CCA4184 - 1 2026-07-11
CCA4183 - 1 2026-07-10
CCA4106 - 1 2026-07-09
CCA4105 - 1 2026-07-09
CCA4104 Air China 1 2026-07-23
CCA4103 - 1 2026-07-23
CCA4047 - 1 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 CCA4104 PEK → CTU Jul 23, 11:30 UTCJul 23, 11:45 UTC15m
2026-07-23 CCA4103 - Jul 23, 08:50 UTCJul 23, 09:10 UTC20m
2026-07-20 CCA4068 ZUH → CTU Jul 20, 12:55 UTCJul 20, 13:05 UTC10m
2026-07-17 CCA4336 - Jul 17, 13:55 UTCJul 17, 14:15 UTC20m
2026-07-15 CCA4047 - Jul 15, 11:15 UTCJul 15, 13:50 UTC2h 35m
2026-07-14 CCA4324 - Jul 14, 13:00 UTCJul 14, 13:10 UTC10m
2026-07-13 CCA4068 - Jul 13, 12:35 UTCJul 13, 12:50 UTC15m
2026-07-13 CCA4326 - Jul 13, 05:10 UTCJul 13, 05:25 UTC15m
2026-07-11 CCA4184 - Jul 11, 01:40 UTCJul 11, 02:00 UTC20m
2026-07-10 CCA4183 - Jul 10, 13:15 UTCJul 10, 13:35 UTC20m
2026-07-09 CCA4106 - Jul 9, 13:05 UTCJul 9, 13:25 UTC20m
2026-07-09 CCA4105 - Jul 9, 10:25 UTCJul 9, 10:35 UTC10m
2026-07-09 CCA4120 - Jul 9, 03:20 UTCJul 9, 03:35 UTC15m
2026-07-05 CCA4102 - Jul 5, 05:10 UTCJul 5, 05:35 UTC25m
2026-07-01 CCA4035 - Jul 1, 01:50 UTCJul 1, 02:25 UTC35m
2026-06-29 CCA4336 - Jun 29, 14:14 UTCJun 29, 14:29 UTC15m
2026-06-23 CCA4035 CTU → SYX Jun 23, 12:20 UTCJun 24, 02:00 UTC13h 40m
2026-06-21 CCA4102 - Jun 21, 05:25 UTCJun 21, 05:40 UTC15m
2026-06-08 CCA4102 PEK → CTU Jun 8, 05:05 UTCJun 8, 05:25 UTC20m
2026-06-07 CCA4336 SZX → CTU Jun 7, 15:20 UTCJun 7, 15:30 UTC10m
2026-06-07 CCA4335 CTU → SZX Jun 7, 13:45 UTCJun 7, 13:55 UTC10m
2026-06-05 CCA4110 PEK → CTU Jun 5, 12:10 UTCJun 5, 12:25 UTC15m
2026-06-05 CCA4338 SZX → CTU Jun 5, 03:25 UTCJun 5, 03:35 UTC10m
2026-06-01 CCA4338 SZX → CTU Jun 1, 03:20 UTCJun 1, 03:30 UTC10m
2026-05-28 CCA4102 PEK → CTU May 28, 05:15 UTCMay 28, 05:40 UTC25m
2026-05-26 CCA4102 PEK → CTU May 26, 05:10 UTCMay 26, 05:30 UTC20m
2026-05-23 CCA4326 SZX → CTU May 23, 06:25 UTCMay 23, 06:35 UTC10m
2026-05-22 CCA4324 SZX → CTU May 22, 12:40 UTCMay 22, 12:50 UTC10m
2026-05-21 CCA4326 SZX → CTU May 21, 07:15 UTCMay 21, 07:35 UTC20m
2026-05-19 CCA4338 SZX → CTU May 19, 03:30 UTCMay 19, 03:45 UTC15m
2026-05-19 CCA4337 CTU → SZX May 19, 01:30 UTCMay 19, 01:40 UTC10m
2026-05-13 CCA4338 SZX → CTU May 13, 03:20 UTCMay 13, 03:30 UTC10m
2026-05-13 CCA4337 CTU → SZX May 13, 01:25 UTCMay 13, 01:35 UTC10m
2026-05-11 CCA4338 SZX → CTU May 11, 03:30 UTCMay 11, 03:45 UTC15m
2026-05-07 CCA4338 SZX → CTU May 7, 03:30 UTCMay 7, 03:45 UTC15m
2026-05-06 CCA4110 PEK → CTU May 6, 11:50 UTCMay 6, 12:10 UTC20m
2026-05-06 CCA4338 SZX → CTU May 6, 03:25 UTCMay 6, 03:40 UTC15m
2026-05-03 CCA4110 PEK → CTU May 3, 11:45 UTCMay 3, 12:00 UTC15m
2026-05-03 CCA4120 PEK → CTU May 3, 03:25 UTCMay 3, 03:50 UTC24m
2026-04-30 CCA4312 SZX → CTU Apr 30, 11:10 UTCApr 30, 11:20 UTC10m
2026-04-29 CCA4336 SZX → CTU Apr 29, 15:15 UTCApr 29, 15:25 UTC10m
2026-04-28 CCA4110 PEK → CTU Apr 28, 12:05 UTCApr 28, 12:15 UTC10m
2026-04-28 CCA4338 SZX → CTU Apr 28, 03:30 UTCApr 28, 03:45 UTC15m
2026-04-26 CCA4102 PEK → CTU Apr 26, 05:10 UTCApr 26, 05:35 UTC25m
2026-04-24 CCA4312 SZX → CTU Apr 24, 13:45 UTCApr 24, 13:55 UTC10m
2026-04-24 CCA4311 CTU → SZX Apr 24, 12:05 UTCApr 24, 12:15 UTC10m
2026-04-23 CCA4336 SZX → CTU Apr 23, 17:50 UTCApr 23, 18:00 UTC10m
2026-04-23 CCA4335 CTU → SZX Apr 23, 15:10 UTCApr 23, 15:20 UTC10m
2026-04-22 CCA4336 SZX → CTU Apr 22, 13:40 UTCApr 22, 13:55 UTC15m
2026-04-19 CCA4102 PEK → CTU Apr 19, 05:05 UTCApr 19, 05:30 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-30C6 page for operator, model, and routing details .

Mode-S 7817F7 frequently asked

What is Mode-S code 7817F7?
7817F7 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-30C6.
Where is Mode-S 7817F7 registered?
Mode-S code 7817F7 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7817F7 broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7817F7, octal 36013767, decimal 7,870,455.
What flights does 7817F7 operate?
Mode-S 7817F7 has broadcast 20 distinct callsigns, including CCA4338, CCA4102, CCA4336, CCA4110, CCA4326.