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 4h ago
Flights observed
46
Distinct callsigns
20
Country
CN
Last broadcast
4h 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
CCA1220 - 4 2026-06-11
CCA1219 - 4 2026-06-11
CCA1150 Air China 4 2026-06-08
CCA1149 Air China 3 2026-06-06
CCA1139 Air China 3 2026-04-28
CCA8139 Air China 2 2026-06-04
CCA1697 Air China 2 2026-06-10
CCA1597 Air China 2 2026-06-09
CCA1214 - 2 2026-05-04
CCA1213 - 2 2026-05-03
CCA1118 Air China 2 2026-06-09
CCA1117 Air China 2 2026-06-09
CCA1112 Air China 2 2026-06-06
CCA1111 Air China 2 2026-05-29
CCA1110 - 2 2026-06-06
CCA8192 Air China 1 2026-06-04
CCA8140 Air China 1 2026-06-04
CCA1282 - 1 2026-04-29
CCA1281 - 1 2026-04-29
CCA1141 Air China 1 2026-05-09

Recent flights last 46

DateFlightRouteTakeoffLandingDuration
2026-06-11 CCA1220 - Jun 11, 10:30 UTCJun 11, 11:20 UTC50m
2026-06-11 CCA1219 - Jun 11, 06:50 UTCJun 11, 07:15 UTC25m
2026-06-10 CCA1697 PEK → DQA Jun 10, 23:40 UTCJun 10, 23:50 UTC10m
2026-06-10 CCA1220 - Jun 10, 12:00 UTCJun 10, 12:20 UTC20m
2026-06-10 CCA1219 - Jun 10, 06:50 UTCJun 10, 07:15 UTC25m
2026-06-09 CCA1697 PEK → DQA Jun 9, 23:20 UTCJun 9, 23:30 UTC10m
2026-06-09 CCA1597 PEK → WEH Jun 9, 12:45 UTCJun 9, 13:00 UTC15m
2026-06-09 CCA1118 DSN → PEK Jun 9, 08:15 UTCJun 9, 08:35 UTC20m
2026-06-09 CCA1117 PEK → DSN Jun 9, 03:05 UTCJun 9, 03:25 UTC20m
2026-06-08 CCA1150 DSN → PEK Jun 8, 08:05 UTCJun 8, 12:10 UTC4h 5m
2026-06-08 CCA1109 - Jun 8, 03:35 UTCJun 8, 03:45 UTC10m
2026-06-06 CCA1150 DSN → PEK Jun 6, 11:19 UTCJun 6, 11:39 UTC20m
2026-06-06 CCA1149 PEK → DSN Jun 6, 08:25 UTCJun 6, 08:50 UTC25m
2026-06-06 CCA1110 - Jun 6, 05:40 UTCJun 6, 05:50 UTC10m
2026-06-06 CCA1112 HET → PEK Jun 6, 00:55 UTCJun 6, 01:15 UTC20m
2026-06-04 CCA8140 TSN → HET Jun 4, 08:30 UTCJun 4, 08:55 UTC25m
2026-06-04 CCA8192 DSN → TSN Jun 4, 05:45 UTCJun 4, 06:05 UTC20m
2026-06-04 CCA8139 HET → TSN Jun 4, 00:15 UTCJun 4, 00:45 UTC30m
2026-05-30 CCA8139 HET → TSN May 30, 23:45 UTCMay 31, 00:05 UTC20m
2026-05-29 CCA1111 PEK → HET May 29, 13:40 UTCMay 29, 13:55 UTC15m
2026-05-27 CCA1597 PEK → WEH May 27, 12:35 UTCMay 27, 12:45 UTC10m
2026-05-27 CCA1220 - May 27, 10:35 UTCMay 27, 10:55 UTC20m
2026-05-27 CCA1219 - May 27, 07:05 UTCMay 27, 07:25 UTC20m
2026-05-09 CCA1141 PEK → DSN May 9, 22:49 UTCMay 9, 23:20 UTC30m
2026-05-09 CCA1150 DSN → PEK May 9, 12:20 UTCMay 9, 12:40 UTC20m
2026-05-09 CCA1149 PEK → DSN May 9, 08:15 UTCMay 9, 08:45 UTC30m
2026-05-09 CCA1110 - May 9, 05:55 UTCMay 9, 06:15 UTC20m
2026-05-09 - - May 9, 03:10 UTCMay 9, 03:20 UTC10m
2026-05-09 CCA1112 HET → PEK May 9, 00:55 UTCMay 9, 01:10 UTC15m
2026-05-04 CCA1111 PEK → HET May 4, 13:05 UTCMay 4, 13:20 UTC15m
2026-05-04 CCA1150 DSN → PEK May 4, 11:10 UTCMay 4, 11:25 UTC15m
2026-05-04 CCA1149 PEK → DSN May 4, 08:35 UTCMay 4, 08:55 UTC20m
2026-05-04 CCA1214 - May 4, 02:50 UTCMay 4, 03:09 UTC20m
2026-05-03 CCA1213 - May 3, 22:45 UTCMay 3, 23:10 UTC25m
2026-05-02 CCA1220 - May 2, 11:15 UTCMay 2, 11:35 UTC20m
2026-05-02 CCA1219 - May 2, 06:50 UTCMay 2, 07:15 UTC25m
2026-04-29 CCA1282 - Apr 29, 05:25 UTCApr 29, 05:45 UTC20m
2026-04-29 CCA1281 - Apr 29, 01:20 UTCApr 29, 01:45 UTC25m
2026-04-28 CCA1139 PEK → YCU Apr 28, 09:50 UTCApr 28, 10:05 UTC15m
2026-04-28 CCA1118 DSN → PEK Apr 28, 06:25 UTCApr 28, 06:45 UTC20m
2026-04-28 CCA1117 PEK → DSN Apr 28, 02:55 UTCApr 28, 03:15 UTC20m
2026-04-27 CCA1139 PEK → YCU Apr 27, 09:55 UTCApr 27, 10:15 UTC20m
2026-04-27 CCA1214 - Apr 27, 02:40 UTCApr 27, 02:50 UTC10m
2026-04-26 CCA1213 - Apr 26, 22:55 UTCApr 26, 23:15 UTC20m
2026-04-26 CCA1140 YCU → PEK Apr 26, 13:25 UTCApr 26, 13:35 UTC10m
2026-04-26 CCA1139 PEK → YCU Apr 26, 10:00 UTCApr 26, 10:10 UTC10m

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 4h 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 CCA1220, CCA1219, CCA1150, CCA1149, CCA1139.