Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 Jul 26, 11:25 UTC
Flights observed
109
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 11:25 UTC

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 6 2026-07-24
CCA742 Air China 4 2026-07-24
CCA1931 - 4 2026-07-21
CCA4314 Air China 3 2026-06-01
CCA9631 - 2 2026-07-17
CCA8349 - 2 2026-07-18
CCA811 Air China 2 2026-05-29
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
CCA4104 Air China 2 2026-07-26
CCA1859 - 2 2026-07-08
CCA1821 Air China 2 2026-07-25
CCA1623 Air China 2 2026-07-25
CCA1539 - 2 2026-05-18
CCA1369 - 2 2026-07-12
CCA1311 - 2 2026-07-16
CCA1254 Air China 2 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CCA4104 PEK → CTU Jul 26, 11:10 UTCJul 26, 11:25 UTC15m
2026-07-26 CCA809 PEK → VVO Jul 26, 03:25 UTCJul 26, 03:35 UTC10m
2026-07-25 CCA1821 PEK → FOC Jul 25, 15:05 UTCJul 25, 15:15 UTC10m
2026-07-25 CCA1623 PEK → HRB Jul 25, 04:40 UTCJul 25, 04:50 UTC10m
2026-07-25 CCA1703 HGH → PEK Jul 25, 02:20 UTCJul 25, 02:35 UTC15m
2026-07-24 CCA1728 CAN → HGH Jul 24, 12:20 UTCJul 24, 12:30 UTC10m
2026-07-24 CCA742 HAN → PEK Jul 24, 09:35 UTCJul 24, 10:00 UTC25m
2026-07-24 CCA742 HAN → PEK Jul 24, 07:15 UTCJul 24, 07:25 UTC10m
2026-07-24 CCA741 PEK → HAN Jul 24, 01:15 UTCJul 24, 01:40 UTC25m
2026-07-23 CCA1402 CTU → PEK Jul 23, 14:50 UTCJul 23, 15:15 UTC25m
2026-07-23 CCA1401 PEK → CTU Jul 23, 09:10 UTCJul 23, 09:25 UTC15m
2026-07-23 CCA1706 PEK → HGH Jul 23, 01:55 UTCJul 23, 02:05 UTC10m
2026-07-22 CCA110 HKG → PEK Jul 22, 11:25 UTCJul 22, 11:30 UTC5m
2026-07-22 CCA109 PEK → HKG Jul 22, 05:15 UTCJul 22, 05:25 UTC10m
2026-07-21 CCA1931 - Jul 21, 13:30 UTCJul 21, 14:00 UTC30m
2026-07-21 CCA1714 - Jul 21, 04:45 UTCJul 21, 04:55 UTC10m
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

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 Jul 26, 11:25 UTC.
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, CCA742, CCA1931, CCA4314, CCA9631.