Apparatus

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sensors Mode-S transponder

781955

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-605Y · COMAC ARJ-21-700 Xiangfeng

Hex
781955
Octal
36014525
Decimal
7,870,805
Country
CN
Tail
B-605Y
Type
AJ27
No current signal · last broadcast 29d ago
Flights observed
72
Distinct callsigns
20
Country
CN
Last broadcast
29d ago

Last known position

Most recent position reported by Mode-S 781955.

Country allocation

The ICAO 24-bit address 781955 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
CCA1264 - 6 2026-07-24
CCA1263 - 6 2026-07-24
CCA1141 - 4 2026-07-22
CCA1112 - 4 2026-07-15
CCA1109 - 4 2026-07-15
CCA9507 Air China 3 2026-07-24
CCA1142 - 3 2026-06-30
CCA9512 - 2 2026-07-20
CCA9511 Air China 2 2026-07-20
CCA8192 Air China 2 2026-06-08
CCA8140 Air China 2 2026-06-08
CCA8139 Air China 2 2026-06-07
CCA1929 Air China 2 2026-07-25
CCA1559 Air China 2 2026-07-24
CCA1214 - 2 2026-07-19
CCA1149 - 2 2026-07-01
CCA9797 - 1 2026-07-16
CCA9684 Air China 1 2026-07-19
CCA9683 Air China 1 2026-07-19
CCA9661 Air China 1 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CCA1270 ENY → PEK Jul 26, 09:50 UTCJul 26, 13:30 UTC3h 40m
2026-07-26 CCA1128 YCU → PEK Jul 26, 07:55 UTCJul 26, 08:05 UTC10m
2026-07-26 CCA1127 PEK → YCU Jul 26, 04:35 UTCJul 26, 04:45 UTC10m
2026-07-25 CCA1929 PEK → YIH Jul 25, 10:20 UTCJul 25, 10:35 UTC15m
2026-07-25 CCA1228 - Jul 25, 08:15 UTCJul 25, 08:35 UTC20m
2026-07-25 CCA1227 - Jul 25, 04:30 UTCJul 25, 04:50 UTC20m
2026-07-24 CCA9507 PEK → YNT Jul 24, 22:25 UTCJul 24, 22:40 UTC15m
2026-07-24 CCA1264 - Jul 24, 14:15 UTCJul 24, 14:35 UTC20m
2026-07-24 CCA1263 - Jul 24, 10:45 UTCJul 24, 11:05 UTC20m
2026-07-24 CCA1559 PEK → YNT Jul 24, 05:15 UTCJul 24, 05:25 UTC10m
2026-07-23 CCA1929 PEK → YIH Jul 23, 10:50 UTCJul 23, 11:05 UTC15m
2026-07-22 CCA1141 - Jul 22, 22:50 UTCJul 22, 23:10 UTC20m
2026-07-22 CCA9661 HGH → HRB Jul 22, 00:35 UTCJul 22, 00:45 UTC10m
2026-07-21 CCA1220 - Jul 21, 11:10 UTCJul 21, 11:30 UTC20m
2026-07-21 CCA1219 - Jul 21, 07:10 UTCJul 21, 07:30 UTC20m
2026-07-20 CCA1264 - Jul 20, 15:50 UTCJul 20, 16:10 UTC20m
2026-07-20 CCA1263 - Jul 20, 12:25 UTCJul 20, 12:45 UTC20m
2026-07-20 CCA9512 - Jul 20, 08:00 UTCJul 20, 08:45 UTC45m
2026-07-20 CCA9511 PEK → YCU Jul 20, 03:35 UTCJul 20, 03:55 UTC20m
2026-07-19 CCA9684 SZX → CKG Jul 19, 10:00 UTCJul 19, 10:15 UTC15m
2026-07-19 CCA9683 PEK → SZX Jul 19, 06:05 UTCJul 19, 06:20 UTC15m
2026-07-19 CCA1214 - Jul 19, 03:05 UTCJul 19, 03:25 UTC20m
2026-07-18 CCA1213 - Jul 18, 23:40 UTCJul 19, 00:00 UTC20m
2026-07-18 CCA9506 - Jul 18, 15:45 UTCJul 18, 16:05 UTC20m
2026-07-18 CCA9505 - Jul 18, 12:00 UTCJul 18, 12:25 UTC25m
2026-07-18 CCA9512 - Jul 18, 07:05 UTCJul 18, 07:20 UTC15m
2026-07-18 CCA9511 PEK → YCU Jul 18, 03:35 UTCJul 18, 03:50 UTC15m
2026-07-17 CCA9507 - Jul 17, 22:29 UTCJul 17, 22:40 UTC10m
2026-07-17 CCA1683 - Jul 17, 13:25 UTCJul 17, 13:35 UTC10m
2026-07-17 CCA1687 - Jul 17, 05:45 UTCJul 17, 05:55 UTC10m
2026-07-16 CCA9507 - Jul 16, 22:30 UTCJul 16, 22:40 UTC10m
2026-07-16 CCA1264 - Jul 16, 14:29 UTCJul 16, 14:50 UTC20m
2026-07-16 CCA1263 - Jul 16, 10:50 UTCJul 16, 11:15 UTC25m
2026-07-16 CCA9797 - Jul 16, 06:20 UTCJul 16, 06:30 UTC10m
2026-07-15 CCA1109 - Jul 15, 03:15 UTCJul 15, 03:25 UTC10m
2026-07-15 CCA1112 - Jul 15, 01:00 UTCJul 15, 01:15 UTC15m
2026-07-03 CCA1111 - Jul 3, 14:10 UTCJul 3, 14:35 UTC25m
2026-07-01 CCA1149 - Jul 1, 08:25 UTCJul 1, 08:50 UTC25m
2026-07-01 CCA1109 - Jul 1, 03:15 UTCJul 1, 03:30 UTC15m
2026-06-30 CCA1264 - Jun 30, 14:30 UTCJun 30, 14:50 UTC20m
2026-06-30 CCA1263 - Jun 30, 10:55 UTCJun 30, 11:20 UTC25m
2026-06-30 CCA1142 - Jun 30, 02:05 UTCJun 30, 02:25 UTC20m
2026-06-29 CCA1141 PEK → DSN Jun 29, 23:19 UTCJun 29, 23:39 UTC20m
2026-06-29 CCA1282 - Jun 29, 05:30 UTCJun 29, 05:50 UTC20m
2026-06-29 CCA1281 - Jun 29, 01:34 UTCJun 29, 02:00 UTC25m
2026-06-28 CCA1264 - Jun 28, 14:25 UTCJun 28, 14:39 UTC15m
2026-06-28 CCA1263 - Jun 28, 10:44 UTCJun 28, 11:00 UTC15m
2026-06-28 CCA1559 - Jun 28, 04:15 UTCJun 28, 04:25 UTC10m
2026-06-28 CCA1142 - Jun 28, 01:29 UTCJun 28, 01:50 UTC20m
2026-06-27 CCA1141 PEK → DSN Jun 27, 23:00 UTCJun 27, 23:25 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-605Y page for operator, model, and routing details .

Mode-S 781955 frequently asked

What is Mode-S code 781955?
781955 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-605Y.
Where is Mode-S 781955 registered?
Mode-S code 781955 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781955 broadcasting right now?
No active broadcast right now. Last signal was 29d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781955, octal 36014525, decimal 7,870,805.
What flights does 781955 operate?
Mode-S 781955 has broadcast 20 distinct callsigns, including CCA1264, CCA1263, CCA1141, CCA1112, CCA1109.