Apparatus

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sensors Mode-S transponder

7817AD

ICAO 24-bit transponder address · allocated to China

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

Hex
7817AD
Octal
36013655
Decimal
7,870,381
Country
CN
Tail
B-30AF
Type
A21N
No current signal · last broadcast 1d ago
Flights observed
137
Distinct callsigns
20
Country
CN
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 7817AD.

Country allocation

The ICAO 24-bit address 7817AD 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
CCA1369 - 10 2026-07-16
CCA1879 - 5 2026-06-26
CCA1377 - 5 2026-07-15
CCA1353 - 4 2026-07-07
CCA1237 - 4 2026-07-14
CCA1913 Air China 3 2026-06-07
CCA1906 Air China 3 2026-06-06
CCA1871 - 3 2026-07-11
CCA1704 - 3 2026-06-23
CCA1577 Air China 3 2026-06-03
CCA1574 - 3 2026-07-03
CCA1571 - 3 2026-07-06
CCA1395 Air China 3 2026-07-05
CCA1370 - 3 2026-07-17
CCA1361 - 3 2026-07-05
CCA1343 - 3 2026-07-10
CCA1266 - 3 2026-07-13
CCA1265 - 3 2026-07-13
CCA1238 - 3 2026-07-15
CCA1937 - 2 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CCA1370 - Jul 17, 08:04 UTCJul 17, 08:15 UTC10m
2026-07-16 CCA1369 - Jul 16, 23:35 UTCJul 16, 23:59 UTC25m
2026-07-15 CCA1621 - Jul 15, 22:55 UTCJul 15, 23:05 UTC10m
2026-07-15 CCA1377 - Jul 15, 07:45 UTCJul 15, 10:30 UTC2h 45m
2026-07-15 CCA1238 - Jul 15, 05:20 UTCJul 15, 05:35 UTC15m
2026-07-14 CCA1237 - Jul 14, 22:30 UTCJul 14, 22:55 UTC24m
2026-07-14 CCA1288 - Jul 14, 16:25 UTCJul 14, 16:45 UTC20m
2026-07-14 CCA1287 - Jul 14, 10:35 UTCJul 14, 10:55 UTC20m
2026-07-14 CCA1416 - Jul 14, 07:55 UTCJul 14, 08:15 UTC20m
2026-07-14 CCA1415 - Jul 14, 01:55 UTCJul 14, 02:20 UTC25m
2026-07-13 CCA1266 - Jul 13, 16:25 UTCJul 13, 16:40 UTC15m
2026-07-13 CCA1265 - Jul 13, 10:15 UTCJul 13, 10:35 UTC20m
2026-07-13 CCA1399 - Jul 13, 02:15 UTCJul 13, 02:35 UTC20m
2026-07-12 CCA1718 - Jul 12, 06:45 UTCJul 12, 06:55 UTC10m
2026-07-12 CCA1575 - Jul 12, 01:20 UTCJul 12, 01:35 UTC15m
2026-07-11 CCA1871 - Jul 11, 06:40 UTCJul 11, 06:50 UTC10m
2026-07-10 CCA1343 - Jul 10, 22:55 UTCJul 10, 23:15 UTC20m
2026-07-09 CCA9681 - Jul 9, 10:20 UTCJul 9, 10:40 UTC20m
2026-07-09 CCA1416 - Jul 9, 08:05 UTCJul 9, 08:15 UTC10m
2026-07-09 CCA1415 - Jul 9, 01:55 UTCJul 9, 02:10 UTC15m
2026-07-08 CCA1434 - Jul 8, 11:05 UTCJul 8, 11:15 UTC10m
2026-07-08 CCA1433 - Jul 8, 04:30 UTCJul 8, 04:50 UTC20m
2026-07-07 CCA1353 - Jul 7, 09:55 UTCJul 7, 13:00 UTC3h 5m
2026-07-06 CCA1571 - Jul 6, 11:05 UTCJul 6, 11:15 UTC10m
2026-07-05 CCA1395 TSN → CAN Jul 5, 15:40 UTCJul 5, 15:55 UTC15m
2026-07-05 CCA1361 - Jul 5, 00:30 UTCJul 5, 00:55 UTC25m
2026-07-04 CCA1266 - Jul 4, 16:55 UTCJul 4, 17:05 UTC10m
2026-07-04 CCA1265 - Jul 4, 10:35 UTCJul 4, 10:45 UTC10m
2026-07-04 CCA1370 - Jul 4, 08:40 UTCJul 4, 08:50 UTC10m
2026-07-03 CCA1369 PEK → SYX Jul 3, 23:50 UTCJul 4, 00:15 UTC25m
2026-07-03 CCA1574 - Jul 3, 15:15 UTCJul 3, 15:25 UTC10m
2026-07-03 CCA1462 - Jul 3, 06:15 UTCJul 3, 06:35 UTC20m
2026-07-02 CCA1461 - Jul 2, 23:20 UTCJul 2, 23:40 UTC20m
2026-07-02 CCA1370 - Jul 2, 08:35 UTCJul 2, 08:45 UTC10m
2026-07-01 CCA1369 PEK → SYX Jul 1, 23:45 UTCJul 2, 02:45 UTC3h 0m
2026-07-01 CCA1371 - Jul 1, 05:40 UTCJul 1, 06:00 UTC20m
2026-06-30 CCA1871 - Jun 30, 07:00 UTCJun 30, 07:10 UTC10m
2026-06-29 CCA1343 - Jun 29, 23:09 UTCJun 29, 23:29 UTC20m
2026-06-29 CCA1938 - Jun 29, 17:10 UTCJun 29, 17:45 UTC35m
2026-06-29 CCA1937 - Jun 29, 09:44 UTCJun 29, 10:04 UTC20m
2026-06-28 CCA1369 PEK → SYX Jun 28, 23:39 UTCJun 29, 00:00 UTC20m
2026-06-28 CCA1574 - Jun 28, 18:25 UTCJun 28, 18:34 UTC10m
2026-06-28 CCA1574 - Jun 28, 15:20 UTCJun 28, 15:40 UTC20m
2026-06-27 CCA1362 - Jun 27, 08:35 UTCJun 27, 08:49 UTC15m
2026-06-27 CCA1361 PEK → HAK Jun 27, 00:39 UTCJun 27, 01:04 UTC25m
2026-06-26 CCA1292 - Jun 26, 17:25 UTCJun 26, 17:40 UTC15m
2026-06-26 CCA1291 - Jun 26, 08:05 UTCJun 26, 08:15 UTC10m
2026-06-26 CCA1879 - Jun 26, 00:35 UTCJun 26, 00:45 UTC10m
2026-06-25 CCA1252 - Jun 25, 11:30 UTCJun 25, 11:50 UTC20m
2026-06-25 CCA1251 - Jun 25, 02:39 UTCJun 25, 02:59 UTC20m

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

Mode-S 7817AD frequently asked

What is Mode-S code 7817AD?
7817AD is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-30AF.
Where is Mode-S 7817AD registered?
Mode-S code 7817AD is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7817AD broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7817AD, octal 36013655, decimal 7,870,381.
What flights does 7817AD operate?
Mode-S 7817AD has broadcast 20 distinct callsigns, including CCA1369, CCA1879, CCA1377, CCA1353, CCA1237.