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sensors Mode-S transponder

781E4E

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-653D · COMAC ARJ-21-700 Xiangfeng

Hex
781E4E
Octal
36017116
Decimal
7,872,078
Country
CN
Tail
B-653D
Type
AJ27
No current signal · last broadcast 4d ago
Flights observed
69
Distinct callsigns
20
Country
CN
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S 781E4E.

Country allocation

The ICAO 24-bit address 781E4E 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
CCA8192 Air China 5 2026-06-12
CCA8139 Air China 5 2026-06-12
CCA8140 Air China 4 2026-06-12
CCA1280 - 3 2026-07-25
CCA1139 - 3 2026-07-08
CCA1109 - 3 2026-07-17
CCA9604 Air China 2 2026-07-19
CCA9603 Air China 2 2026-07-18
CCA9511 - 2 2026-07-08
CCA9507 - 2 2026-07-07
CCA1593 - 2 2026-07-18
CCA1282 - 2 2026-07-25
CCA1281 - 2 2026-07-25
CCA1214 - 2 2026-07-22
CCA1213 - 2 2026-07-21
CCA1150 - 2 2026-07-25
CCA1149 Air China 2 2026-07-25
CCA1118 Air China 2 2026-07-22
CCA1117 Air China 2 2026-07-22
CCA1112 - 2 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 CCA1280 - Jul 25, 22:55 UTCJul 26, 06:45 UTC7h 51m
2026-07-25 CCA1150 - Jul 25, 11:10 UTCJul 25, 11:35 UTC25m
2026-07-25 CCA1149 PEK → DSN Jul 25, 08:25 UTCJul 25, 08:45 UTC20m
2026-07-25 CCA1282 - Jul 25, 05:15 UTCJul 25, 05:35 UTC20m
2026-07-25 CCA1281 - Jul 25, 01:35 UTCJul 25, 02:00 UTC25m
2026-07-24 CCA1220 - Jul 24, 10:45 UTCJul 24, 11:05 UTC20m
2026-07-24 CCA1219 - Jul 24, 07:10 UTCJul 24, 07:30 UTC20m
2026-07-23 CCA9684 SZX → CKG Jul 23, 10:30 UTCJul 23, 10:45 UTC15m
2026-07-23 CCA9683 PEK → SZX Jul 23, 06:30 UTCJul 23, 06:55 UTC25m
2026-07-22 CCA1118 DSN → PEK Jul 22, 15:00 UTCJul 22, 15:30 UTC30m
2026-07-22 CCA1117 PEK → DSN Jul 22, 12:25 UTCJul 22, 12:45 UTC20m
2026-07-22 CCA1214 - Jul 22, 03:05 UTCJul 22, 03:25 UTC20m
2026-07-21 CCA1213 - Jul 21, 23:40 UTCJul 22, 00:00 UTC20m
2026-07-21 CCA9797 - Jul 21, 06:00 UTCJul 21, 06:15 UTC15m
2026-07-21 CCA9661 - Jul 21, 00:50 UTCJul 21, 01:05 UTC15m
2026-07-20 CCA1269 PEK → ENY Jul 20, 14:00 UTCJul 20, 17:30 UTC3h 30m
2026-07-19 CCA9604 NGB → PKX Jul 19, 04:00 UTCJul 19, 04:10 UTC10m
2026-07-18 CCA9603 PKX → NGB Jul 18, 23:20 UTCJul 18, 23:40 UTC20m
2026-07-18 CCA1593 - Jul 18, 12:45 UTCJul 18, 13:00 UTC15m
2026-07-18 CCA9604 NGB → PKX Jul 18, 03:45 UTCJul 18, 03:55 UTC10m
2026-07-17 CCA9603 PKX → NGB Jul 17, 23:10 UTCJul 17, 23:30 UTC20m
2026-07-17 CCA1929 - Jul 17, 10:30 UTCJul 17, 10:44 UTC15m
2026-07-17 CCA1109 - Jul 17, 03:34 UTCJul 17, 03:50 UTC15m
2026-07-17 CCA1112 - Jul 17, 01:00 UTCJul 17, 01:20 UTC20m
2026-07-12 CCA1111 - Jul 12, 13:25 UTCJul 12, 13:45 UTC20m
2026-07-12 CCA1150 - Jul 12, 11:01 UTCJul 12, 11:20 UTC20m
2026-07-12 CCA1149 - Jul 12, 08:25 UTCJul 12, 08:50 UTC25m
2026-07-12 CCA1282 - Jul 12, 05:15 UTCJul 12, 05:30 UTC15m
2026-07-12 CCA1281 - Jul 12, 01:40 UTCJul 12, 02:05 UTC25m
2026-07-11 CCA1594 - Jul 11, 16:40 UTCJul 11, 17:15 UTC35m
2026-07-11 CCA1214 - Jul 11, 03:05 UTCJul 11, 03:25 UTC20m
2026-07-10 CCA1213 - Jul 10, 23:40 UTCJul 11, 00:05 UTC25m
2026-07-10 CCA1683 - Jul 10, 14:30 UTCJul 10, 14:40 UTC10m
2026-07-10 CCA1280 - Jul 10, 02:10 UTCJul 10, 02:45 UTC35m
2026-07-09 CCA1279 - Jul 9, 23:00 UTCJul 9, 23:15 UTC15m
2026-07-08 CCA1280 - Jul 8, 23:15 UTCJul 9, 02:55 UTC3h 40m
2026-07-08 CCA1139 - Jul 8, 10:05 UTCJul 8, 10:15 UTC10m
2026-07-08 CCA9512 - Jul 8, 08:15 UTCJul 8, 08:25 UTC10m
2026-07-08 CCA9511 - Jul 8, 03:25 UTCJul 8, 03:45 UTC20m
2026-07-07 CCA9507 - Jul 7, 22:30 UTCJul 7, 22:40 UTC10m
2026-07-06 CCA1139 - Jul 6, 10:25 UTCJul 6, 10:45 UTC20m
2026-07-06 CCA1109 - Jul 6, 03:15 UTCJul 6, 03:25 UTC10m
2026-07-05 CCA1593 - Jul 5, 13:50 UTCJul 5, 14:00 UTC10m
2026-07-05 CCA9511 - Jul 5, 03:30 UTCJul 5, 03:45 UTC15m
2026-07-04 CCA9507 - Jul 4, 22:40 UTCJul 4, 22:50 UTC10m
2026-07-04 CCA1139 - Jul 4, 10:00 UTCJul 4, 10:15 UTC15m
2026-07-04 CCA1112 - Jul 4, 01:05 UTCJul 4, 01:25 UTC20m
2026-06-24 CCA1111 - Jun 24, 13:30 UTCJun 24, 13:54 UTC25m
2026-06-23 CCA1142 - Jun 23, 01:59 UTCJun 23, 02:20 UTC20m
2026-06-22 CCA1141 PEK → DSN Jun 22, 23:14 UTCJun 22, 23:39 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-653D page for operator, model, and routing details .

Mode-S 781E4E frequently asked

What is Mode-S code 781E4E?
781E4E is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-653D.
Where is Mode-S 781E4E registered?
Mode-S code 781E4E is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781E4E broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781E4E, octal 36017116, decimal 7,872,078.
What flights does 781E4E operate?
Mode-S 781E4E has broadcast 20 distinct callsigns, including CCA8192, CCA8139, CCA8140, CCA1280, CCA1139.