Apparatus

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sensors Mode-S transponder

781C70

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-326D · AIRBUS A-321neo

Hex
781C70
Octal
36016160
Decimal
7,871,600
Country
CN
Tail
B-326D
Type
A21N
No current signal · last broadcast 7h ago
Flights observed
93
Distinct callsigns
20
Country
CN
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 781C70.

Country allocation

The ICAO 24-bit address 781C70 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
CCA741 Air China 5 2026-06-07
CCA4314 Air China 3 2026-06-01
CCA1931 - 3 2026-07-09
CCA9631 - 2 2026-07-17
CCA8349 - 2 2026-07-18
CCA811 Air China 2 2026-05-29
CCA742 Air China 2 2026-06-07
CCA4338 - 2 2026-07-08
CCA4337 - 2 2026-07-08
CCA4336 - 2 2026-07-01
CCA4315 - 2 2026-07-04
CCA4110 Air China 2 2026-06-07
CCA1859 - 2 2026-07-08
CCA1539 - 2 2026-05-18
CCA1369 - 2 2026-07-12
CCA1311 - 2 2026-07-16
CCA1254 Air China 2 2026-05-30
CCA9632 - 1 2026-07-17
CCA745 - 1 2026-07-14
CCA4324 - 1 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 CCA1796 - Jul 18, 12:10 UTCJul 18, 12:20 UTC10m
2026-07-18 CCA1795 HGH → CAN Jul 18, 08:30 UTCJul 18, 09:00 UTC30m
2026-07-18 CCA8349 - Jul 18, 02:05 UTCJul 18, 02:14 UTC10m
2026-07-17 CCA9632 - Jul 17, 09:15 UTCJul 17, 09:25 UTC10m
2026-07-17 CCA9631 - Jul 17, 02:25 UTCJul 17, 02:45 UTC20m
2026-07-16 CCA1443 - Jul 16, 10:45 UTCJul 16, 10:59 UTC15m
2026-07-16 CCA1311 - Jul 16, 01:35 UTCJul 16, 02:00 UTC25m
2026-07-15 CCA1400 - Jul 15, 08:10 UTCJul 15, 08:20 UTC10m
2026-07-15 CCA1399 - Jul 15, 02:50 UTCJul 15, 03:10 UTC20m
2026-07-14 CCA745 - Jul 14, 11:35 UTCJul 14, 19:15 UTC7h 40m
2026-07-14 CCA9631 - Jul 14, 02:20 UTCJul 14, 02:40 UTC20m
2026-07-13 CCA1577 - Jul 13, 09:35 UTCJul 13, 09:45 UTC10m
2026-07-12 CCA1369 - Jul 12, 23:40 UTCJul 13, 00:01 UTC20m
2026-07-12 CCA110 - Jul 12, 09:55 UTCJul 12, 10:20 UTC25m
2026-07-12 CCA109 - Jul 12, 04:55 UTCJul 12, 07:55 UTC3h 0m
2026-07-11 CCA1238 - Jul 11, 05:15 UTCJul 11, 05:40 UTC25m
2026-07-10 CCA1237 - Jul 10, 22:25 UTCJul 10, 22:45 UTC20m
2026-07-10 CCA1371 - Jul 10, 05:05 UTCJul 10, 10:45 UTC5h 40m
2026-07-09 CCA1931 - Jul 9, 12:00 UTCJul 9, 12:15 UTC15m
2026-07-09 CCA1361 - Jul 9, 00:30 UTCJul 9, 00:55 UTC25m
2026-07-08 CCA1859 - Jul 8, 13:10 UTCJul 8, 13:25 UTC15m
2026-07-08 CCA4109 - Jul 8, 10:30 UTCJul 8, 10:45 UTC15m
2026-07-08 CCA4338 - Jul 8, 04:55 UTCJul 8, 05:05 UTC10m
2026-07-08 CCA4337 - Jul 8, 01:45 UTCJul 8, 02:05 UTC20m
2026-07-06 CCA4324 - Jul 6, 15:15 UTCJul 6, 15:30 UTC15m
2026-07-06 CCA4323 - Jul 6, 13:25 UTCJul 6, 13:35 UTC10m
2026-07-04 CCA4315 - Jul 4, 09:35 UTCJul 4, 12:20 UTC2h 45m
2026-07-03 CCA4316 - Jul 3, 10:15 UTCJul 4, 09:45 UTC23h 30m
2026-07-03 CCA4315 - Jul 3, 07:50 UTCJul 3, 10:25 UTC2h 35m
2026-07-01 CCA4336 - Jul 1, 13:40 UTCJul 1, 13:50 UTC10m
2026-06-13 CCA4336 - Jun 13, 13:40 UTCJun 13, 13:55 UTC15m
2026-06-07 CCA4110 PEK → CTU Jun 7, 12:35 UTCJun 7, 12:55 UTC20m
2026-06-07 CCA742 HAN → PEK Jun 7, 07:05 UTCJun 7, 07:30 UTC25m
2026-06-07 CCA741 PEK → HAN Jun 7, 04:20 UTCJun 7, 04:35 UTC15m
2026-06-07 CCA741 PEK → HAN Jun 7, 01:20 UTCJun 7, 01:45 UTC25m
2026-06-06 CCA4108 PEK → CTU Jun 6, 06:35 UTCJun 6, 07:00 UTC25m
2026-06-05 CCA4298 HAK → CTU Jun 5, 07:00 UTCJun 5, 07:10 UTC10m
2026-06-02 CCA4110 PEK → CTU Jun 2, 12:05 UTCJun 3, 08:00 UTC19h 55m
2026-06-02 CCA4338 SZX → CTU Jun 2, 03:35 UTCJun 2, 03:45 UTC10m
2026-06-02 CCA4337 CTU → SZX Jun 2, 01:35 UTCJun 2, 01:45 UTC10m
2026-06-01 CCA4314 SZX → CTU Jun 1, 09:35 UTCJun 1, 09:45 UTC10m
2026-05-30 CCA1254 URC → PEK May 30, 11:50 UTCMay 30, 12:05 UTC15m
2026-05-30 CCA1253 PEK → URC May 30, 03:55 UTCMay 30, 04:05 UTC10m
2026-05-29 CCA811 PEK → VVO May 29, 05:20 UTCMay 29, 05:30 UTC10m
2026-05-28 CCA1931 PEK → NNG May 28, 11:55 UTCMay 28, 12:15 UTC20m
2026-05-28 CCA742 HAN → PEK May 28, 06:35 UTCMay 28, 06:55 UTC20m
2026-05-28 CCA741 PEK → HAN May 28, 04:25 UTCMay 28, 04:45 UTC20m
2026-05-28 CCA741 PEK → HAN May 28, 01:30 UTCMay 28, 01:50 UTC20m
2026-05-27 CCA1939 PEK → KWL May 27, 00:30 UTCMay 27, 00:49 UTC20m
2026-05-26 CCA1933 PEK → NNG May 26, 07:34 UTCMay 26, 07:55 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-326D page for operator, model, and routing details .

Mode-S 781C70 frequently asked

What is Mode-S code 781C70?
781C70 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-326D.
Where is Mode-S 781C70 registered?
Mode-S code 781C70 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781C70 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 781C70, octal 36016160, decimal 7,871,600.
What flights does 781C70 operate?
Mode-S 781C70 has broadcast 20 distinct callsigns, including CCA741, CCA4314, CCA1931, CCA9631, CCA8349.