Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781E34

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-222K · BOEING 777-200LR

Hex
781E34
Octal
36017064
Decimal
7,872,052
Country
CN
Tail
B-222K
Type
B77L
No current signal · last broadcast 40m ago
Flights observed
106
Distinct callsigns
20
Country
CN
Last broadcast
40m ago

Last known position

Most recent position reported by Mode-S 781E34.

Country allocation

The ICAO 24-bit address 781E34 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
CKK231 China Cargo Airlines 12 2026-05-18
CKK221 China Cargo Airlines 11 2026-05-24
CKK227 China Cargo Airlines 8 2026-05-11
CKK222 China Cargo Airlines 8 2026-05-26
CKK223 China Cargo Airlines 6 2026-05-14
CKK214 China Cargo Airlines 6 2026-05-07
CKK205 China Cargo Airlines 6 2026-05-23
CKK203 - 6 2026-05-28
CKK204 - 5 2026-05-28
CKK232 China Cargo Airlines 4 2026-05-19
CKK224 China Cargo Airlines 4 2026-05-15
CKK216 China Cargo Airlines 4 2026-05-20
CKK213 China Cargo Airlines 4 2026-05-07
CKK206 China Cargo Airlines 4 2026-05-24
CKK257 China Cargo Airlines 3 2026-05-29
CKK228 China Cargo Airlines 3 2026-05-11
CKK262 China Cargo Airlines 2 2026-05-21
CKK222A - 2 2026-05-09
CKK215 China Cargo Airlines 2 2026-05-20
CKK287 China Cargo Airlines 1 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CKK258 ICN → PVG May 29, 20:05 UTCMay 30, 06:25 UTC10h 20m
2026-05-29 CKK257 PVG → ICN May 29, 17:10 UTCMay 29, 17:45 UTC35m
2026-05-28 CKK257 PVG → ICN May 28, 21:55 UTCMay 29, 17:45 UTC19h 50m
2026-05-28 CKK257 PVG → ICN May 28, 19:05 UTCMay 29, 17:45 UTC22h 40m
2026-05-28 CKK204 - May 28, 12:25 UTCMay 28, 22:05 UTC9h 40m
2026-05-28 CKK203 - May 28, 02:50 UTCMay 28, 09:20 UTC6h 30m
2026-05-26 CKK222 LAX → PVG May 26, 07:55 UTCMay 26, 20:15 UTC12h 20m
2026-05-25 CKK222 LAX → PVG May 25, 21:45 UTCMay 26, 20:15 UTC22h 30m
2026-05-24 CKK221 PVG → LAX May 24, 23:05 UTCMay 25, 18:35 UTC19h 30m
2026-05-24 CKK221 PVG → LAX May 24, 21:05 UTCMay 25, 18:35 UTC21h 30m
2026-05-24 CKK221 PVG → LAX May 24, 19:05 UTCMay 25, 18:35 UTC23h 30m
2026-05-24 CKK206 AMS → PVG May 24, 17:55 UTCMay 25, 09:30 UTC15h 35m
2026-05-23 CKK205 PVG → AMS May 23, 19:05 UTCMay 24, 14:00 UTC18h 55m
2026-05-23 CKK205 PVG → AMS May 23, 18:25 UTCMay 24, 14:00 UTC19h 35m
2026-05-23 CKK205 PVG → AMS May 23, 15:05 UTCMay 24, 14:00 UTC22h 55m
2026-05-23 CKK204 - May 23, 13:05 UTCMay 24, 13:00 UTC23h 55m
2026-05-23 CKK204 - May 23, 12:55 UTCMay 24, 11:00 UTC22h 5m
2026-05-23 CKK203 - May 23, 03:00 UTCMay 23, 10:00 UTC7h 0m
2026-05-22 CKK203 - May 22, 07:05 UTCMay 23, 06:40 UTC23h 34m
2026-05-22 CKK287 PVG → SIN May 22, 04:20 UTCMay 22, 04:30 UTC10m
2026-05-21 CKK262 TPE → PVG May 21, 18:50 UTCMay 22, 01:45 UTC6h 55m
2026-05-20 CKK216 CDG → PVG May 20, 22:05 UTCMay 21, 17:00 UTC18h 55m
2026-05-20 CKK216 CDG → PVG May 20, 19:05 UTCMay 21, 17:00 UTC21h 55m
2026-05-20 CKK216 CDG → PVG May 20, 17:05 UTCMay 21, 17:00 UTC23h 55m
2026-05-20 CKK216 CDG → PVG May 20, 16:50 UTCMay 21, 01:40 UTC8h 50m
2026-05-20 CKK215 PVG → CDG May 20, 03:55 UTCMay 20, 13:35 UTC9h 41m
2026-05-19 CKK215 PVG → CDG May 19, 13:30 UTCMay 20, 13:00 UTC23h 31m
2026-05-19 CKK232 JFK → PVG May 19, 00:25 UTCMay 19, 14:15 UTC13h 50m
2026-05-18 CKK231 PVG → SEA May 18, 14:30 UTCMay 18, 20:55 UTC6h 24m
2026-05-18 CKK231 PVG → SEA May 18, 05:20 UTCMay 18, 13:00 UTC7h 40m
2026-05-17 CKK231 PVG → SEA May 17, 13:40 UTCMay 18, 13:00 UTC23h 20m
2026-05-17 CKK231 PVG → SEA May 17, 07:25 UTCMay 18, 06:50 UTC23h 25m
2026-05-17 CKK232 JFK → PVG May 17, 00:40 UTCMay 17, 14:25 UTC13h 45m
2026-05-16 CKK231 PVG → SEA May 16, 15:25 UTCMay 16, 22:00 UTC6h 35m
2026-05-16 CKK231 PVG → SEA May 16, 05:20 UTCMay 16, 12:55 UTC7h 36m
2026-05-15 CKK224 LAX → PVG May 15, 10:15 UTCMay 15, 22:15 UTC11h 59m
2026-05-14 CKK223 PVG → LAX May 14, 21:05 UTCMay 15, 07:40 UTC10h 35m
2026-05-13 CKK204 - May 13, 13:00 UTCMay 13, 19:15 UTC6h 15m
2026-05-13 CKK203 - May 13, 02:55 UTCMay 13, 10:00 UTC7h 5m
2026-05-12 CKK203 - May 12, 08:25 UTCMay 13, 06:45 UTC22h 20m
2026-05-11 CKK228 ORD → PVG May 11, 20:15 UTCMay 12, 08:55 UTC12h 40m
2026-05-11 CKK227 PVG → ANC May 11, 12:35 UTCMay 11, 17:50 UTC5h 16m
2026-05-11 CKK227 PVG → ANC May 11, 03:45 UTCMay 11, 11:10 UTC7h 25m
2026-05-10 CKK227 PVG → ANC May 10, 11:05 UTCMay 11, 11:00 UTC23h 55m
2026-05-10 CKK227 PVG → ANC May 10, 09:10 UTCMay 11, 05:05 UTC19h 55m
2026-05-09 CKK222A - May 9, 11:05 UTCMay 10, 06:25 UTC19h 20m
2026-05-09 CKK222A - May 9, 10:45 UTCMay 10, 06:25 UTC19h 40m
2026-05-08 CKK221 PVG → LAX May 8, 08:24 UTCMay 8, 18:25 UTC10h 0m
2026-05-07 CKK221 PVG → LAX May 7, 15:05 UTCMay 8, 09:44 UTC18h 40m
2026-05-07 CKK214 CDG → PVG May 7, 13:05 UTCMay 8, 09:44 UTC20h 40m

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-222K page for operator, model, and routing details .

Mode-S 781E34 frequently asked

What is Mode-S code 781E34?
781E34 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-222K.
Where is Mode-S 781E34 registered?
Mode-S code 781E34 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781E34 broadcasting right now?
No active broadcast right now. Last signal was 40m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781E34, octal 36017064, decimal 7,872,052.
What flights does 781E34 operate?
Mode-S 781E34 has broadcast 20 distinct callsigns, including CKK231, CKK221, CKK227, CKK222, CKK223.