Apparatus

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sensors Mode-S transponder

781FE5

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-654C · COMAC ARJ-21-700 Xiangfeng

Hex
781FE5
Octal
36017745
Decimal
7,872,485
Country
CN
Tail
B-654C
Type
AJ27
No current signal · last broadcast 7h ago
Flights observed
108
Distinct callsigns
20
Country
CN
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 781FE5.

Country allocation

The ICAO 24-bit address 781FE5 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
CCA1118 - 6 2026-07-10
CCA1117 - 6 2026-07-10
CCA1220 - 5 2026-06-30
CCA1219 - 5 2026-06-30
CCA1214 - 5 2026-07-06
CCA1213 - 5 2026-07-05
CCA1150 - 5 2026-07-13
CCA1139 Air China 5 2026-07-25
CCA1149 - 4 2026-07-13
CCA1141 - 4 2026-07-08
CCA1112 Air China 4 2026-07-25
CCA8139 - 3 2026-06-23
CCA1597 Air China 3 2026-06-12
CCA1142 - 3 2026-07-09
CCA1111 - 3 2026-07-13
CCA1109 - 3 2026-07-25
CCA9797 - 2 2026-07-10
CCA9511 Air China 2 2026-07-26
CCA9507 Air China 2 2026-07-25
CCA9506 - 2 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CCA1929 PEK → YIH Jul 26, 10:40 UTCJul 26, 10:55 UTC15m
2026-07-26 CCA9512 YCU → PEK Jul 26, 07:10 UTCJul 26, 07:25 UTC15m
2026-07-26 CCA9511 PEK → YCU Jul 26, 03:35 UTCJul 26, 03:50 UTC15m
2026-07-25 CCA9507 PEK → YNT Jul 25, 22:35 UTCJul 25, 22:45 UTC10m
2026-07-25 CCA1139 PEK → YCU Jul 25, 10:10 UTCJul 25, 10:20 UTC10m
2026-07-25 CCA1109 - Jul 25, 03:20 UTCJul 25, 03:35 UTC15m
2026-07-25 CCA1112 HET → PEK Jul 25, 01:15 UTCJul 25, 01:35 UTC20m
2026-07-13 CCA1111 - Jul 13, 13:20 UTCJul 13, 13:40 UTC20m
2026-07-13 CCA1150 - Jul 13, 11:15 UTCJul 13, 11:35 UTC20m
2026-07-13 CCA1149 - Jul 13, 08:15 UTCJul 13, 08:40 UTC25m
2026-07-12 CCA9603 - Jul 12, 23:10 UTCJul 12, 23:30 UTC20m
2026-07-12 CCA1264 - Jul 12, 14:20 UTCJul 12, 14:35 UTC15m
2026-07-12 CCA1263 - Jul 12, 10:40 UTCJul 12, 11:05 UTC25m
2026-07-11 CCA1280 - Jul 11, 23:00 UTCJul 12, 02:50 UTC3h 50m
2026-07-11 CCA9506 - Jul 11, 14:40 UTCJul 11, 14:55 UTC15m
2026-07-11 CCA9505 - Jul 11, 11:25 UTCJul 11, 11:45 UTC20m
2026-07-11 CCA9511 - Jul 11, 03:25 UTCJul 11, 03:45 UTC20m
2026-07-10 CCA9507 - Jul 10, 22:30 UTCJul 10, 22:40 UTC10m
2026-07-10 CCA1118 - Jul 10, 16:50 UTCJul 10, 17:05 UTC15m
2026-07-10 CCA1117 - Jul 10, 13:20 UTCJul 10, 13:45 UTC25m
2026-07-10 CCA9797 - Jul 10, 06:15 UTCJul 10, 06:25 UTC10m
2026-07-09 CCA1929 - Jul 9, 10:35 UTCJul 9, 11:00 UTC25m
2026-07-09 CCA1142 - Jul 9, 01:45 UTCJul 9, 02:05 UTC20m
2026-07-08 CCA1141 - Jul 8, 23:00 UTCJul 8, 23:25 UTC25m
2026-07-08 CCA1118 - Jul 8, 15:10 UTCJul 8, 15:30 UTC20m
2026-07-08 CCA1117 - Jul 8, 12:35 UTCJul 8, 12:50 UTC15m
2026-07-08 CCA9797 - Jul 8, 06:25 UTCJul 8, 06:55 UTC30m
2026-07-07 CCA9506 - Jul 7, 15:25 UTCJul 7, 15:45 UTC20m
2026-07-07 CCA9505 - Jul 7, 11:45 UTCJul 7, 12:10 UTC25m
2026-07-07 CCA1118 - Jul 7, 06:25 UTCJul 7, 06:45 UTC20m
2026-07-07 CCA1117 - Jul 7, 03:15 UTCJul 7, 03:35 UTC20m
2026-07-06 CCA1264 - Jul 6, 15:45 UTCJul 6, 16:05 UTC20m
2026-07-06 CCA1263 - Jul 6, 10:50 UTCJul 6, 11:15 UTC25m
2026-07-06 CCA1214 - Jul 6, 03:10 UTCJul 6, 03:35 UTC25m
2026-07-05 CCA1213 - Jul 5, 23:45 UTCJul 6, 00:05 UTC20m
2026-07-05 CCA1118 - Jul 5, 16:05 UTCJul 5, 16:25 UTC20m
2026-07-05 CCA1117 - Jul 5, 13:35 UTCJul 5, 14:00 UTC25m
2026-07-05 CCA9684 - Jul 5, 10:45 UTCJul 5, 10:55 UTC10m
2026-07-05 CCA9683 - Jul 5, 06:00 UTCJul 5, 06:20 UTC20m
2026-07-04 CCA1127 - Jul 4, 04:10 UTCJul 4, 04:30 UTC20m
2026-07-03 CCA1683 PEK → DQA Jul 3, 13:10 UTCJul 3, 13:20 UTC10m
2026-07-03 CCA1214 - Jul 3, 03:20 UTCJul 3, 03:40 UTC20m
2026-07-02 CCA1213 - Jul 2, 23:40 UTCJul 3, 00:00 UTC20m
2026-07-02 CCA1142 - Jul 2, 01:40 UTCJul 2, 02:00 UTC20m
2026-07-01 CCA1141 PEK → DSN Jul 1, 23:00 UTCJul 1, 23:25 UTC25m
2026-07-01 CCA9717 - Jul 1, 10:15 UTCJul 1, 10:25 UTC10m
2026-07-01 CCA1559 - Jul 1, 04:45 UTCJul 1, 04:55 UTC10m
2026-07-01 CCA1142 - Jul 1, 02:00 UTCJul 1, 02:20 UTC20m
2026-06-30 CCA1141 PEK → DSN Jun 30, 23:15 UTCJun 30, 23:40 UTC25m
2026-06-30 CCA1220 - Jun 30, 12:10 UTCJun 30, 12:30 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-654C page for operator, model, and routing details .

Mode-S 781FE5 frequently asked

What is Mode-S code 781FE5?
781FE5 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-654C.
Where is Mode-S 781FE5 registered?
Mode-S code 781FE5 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781FE5 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 781FE5, octal 36017745, decimal 7,872,485.
What flights does 781FE5 operate?
Mode-S 781FE5 has broadcast 20 distinct callsigns, including CCA1118, CCA1117, CCA1220, CCA1219, CCA1214.