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 11h ago
Flights observed
210
Distinct callsigns
20
Country
CN
Last broadcast
11h 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 14 2026-05-31
CKK205 - 14 2026-07-08
CKK206 - 13 2026-07-08
CKK221 China Cargo Airlines 11 2026-05-24
CKK216 - 9 2026-07-02
CKK263 - 8 2026-07-04
CKK227 China Cargo Airlines 8 2026-05-11
CKK222 China Cargo Airlines 8 2026-05-26
CKK232 China Cargo Airlines 7 2026-06-01
CKK226 China Cargo Airlines 7 2026-06-08
CKK223 - 7 2026-07-12
CKK215 - 7 2026-07-01
CKK264 - 6 2026-07-10
CKK214 China Cargo Airlines 6 2026-05-07
CKK203 - 6 2026-05-28
CKK626 China Cargo Airlines 5 2026-06-04
CKK261 - 5 2026-07-07
CKK257 - 5 2026-06-27
CKK225 China Cargo Airlines 5 2026-06-07
CKK224 - 5 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CKK224 - Jul 13, 11:35 UTCJul 13, 23:20 UTC11h 45m
2026-07-12 CKK223 - Jul 12, 20:25 UTCJul 13, 07:30 UTC11h 5m
2026-07-10 CKK264 - Jul 10, 23:15 UTCJul 10, 23:25 UTC10m
2026-07-10 CKK242 - Jul 10, 01:25 UTCJul 10, 20:15 UTC18h 50m
2026-07-09 CKK241 - Jul 9, 21:25 UTCJul 9, 23:05 UTC1h 40m
2026-07-08 CKK206 - Jul 8, 16:45 UTCJul 8, 22:45 UTC6h 0m
2026-07-08 CKK205 - Jul 8, 14:10 UTCJul 8, 14:15 UTC5m
2026-07-07 CKK205 TPE → AMS Jul 7, 19:10 UTCJul 8, 14:05 UTC18h 55m
2026-07-07 CKK261 - Jul 7, 16:40 UTCJul 7, 17:15 UTC35m
2026-07-05 CKK274 - Jul 5, 05:10 UTCJul 5, 07:20 UTC2h 10m
2026-07-05 CKK273 - Jul 5, 00:15 UTCJul 5, 02:40 UTC2h 25m
2026-07-04 CKK264 - Jul 4, 09:55 UTCJul 4, 10:10 UTC15m
2026-07-04 CKK263 - Jul 4, 06:20 UTCJul 4, 06:55 UTC35m
2026-07-04 CKK263 - Jul 4, 05:15 UTCJul 4, 05:50 UTC35m
2026-07-02 CKK216 - Jul 2, 19:00 UTCJul 3, 03:25 UTC8h 25m
2026-07-01 CKK215 - Jul 1, 19:05 UTCJul 2, 13:40 UTC18h 35m
2026-07-01 CKK215 - Jul 1, 18:40 UTCJul 2, 13:40 UTC19h 0m
2026-07-01 CKK242 - Jul 1, 02:15 UTCJul 1, 17:05 UTC14h 50m
2026-06-30 CKK241 - Jun 30, 21:20 UTCJun 30, 23:05 UTC1h 45m
2026-06-29 CKK264 - Jun 29, 23:14 UTCJun 29, 23:34 UTC20m
2026-06-29 CKK263 - Jun 29, 20:00 UTCJun 29, 20:15 UTC15m
2026-06-29 CKK263 - Jun 29, 01:05 UTCJun 29, 19:29 UTC18h 25m
2026-06-29 CKK206 AMS → PVG Jun 29, 00:24 UTCJun 29, 19:29 UTC19h 5m
2026-06-28 CKK206 AMS → PVG Jun 28, 21:04 UTCJun 29, 19:29 UTC22h 25m
2026-06-28 CKK206 AMS → PVG Jun 28, 19:20 UTCJun 29, 19:00 UTC23h 40m
2026-06-27 CKK205 - Jun 27, 22:49 UTCJun 28, 15:20 UTC16h 30m
2026-06-27 CKK257 - Jun 27, 19:59 UTCJun 27, 20:34 UTC35m
2026-06-27 CKK264 - Jun 27, 09:09 UTCJun 27, 09:24 UTC15m
2026-06-27 CKK263 - Jun 27, 06:09 UTCJun 27, 06:30 UTC20m
2026-06-27 CKK263 - Jun 27, 05:15 UTCJun 27, 05:35 UTC20m
2026-06-26 CKK242 - Jun 26, 01:45 UTCJun 26, 03:29 UTC1h 45m
2026-06-25 CKK241 - Jun 25, 13:00 UTCJun 25, 23:05 UTC10h 5m
2026-06-25 CKK288 - Jun 25, 07:05 UTCJun 25, 10:04 UTC3h 0m
2026-06-24 CKK287 - Jun 24, 16:59 UTCJun 25, 04:29 UTC11h 30m
2026-06-24 CKK288 - Jun 24, 11:50 UTCJun 24, 14:50 UTC3h 0m
2026-06-23 CKK262 - Jun 23, 18:50 UTCJun 24, 08:30 UTC13h 40m
2026-06-23 CKK261 - Jun 23, 16:05 UTCJun 23, 16:35 UTC30m
2026-06-22 CKK236 - Jun 22, 17:29 UTCJun 23, 16:35 UTC23h 5m
2026-06-22 CKK236 - Jun 22, 11:54 UTCJun 22, 17:55 UTC6h 0m
2026-06-21 CKK235 - Jun 21, 15:49 UTCJun 22, 08:54 UTC17h 5m
2026-06-21 CKK235 - Jun 21, 11:05 UTCJun 22, 08:54 UTC21h 50m
2026-06-21 CKK602 BUD → FRA Jun 21, 10:14 UTCJun 22, 08:54 UTC22h 40m
2026-06-21 CKK601 - Jun 21, 00:25 UTCJun 21, 06:44 UTC6h 20m
2026-06-19 CKK236 - Jun 19, 11:49 UTCJun 19, 17:39 UTC5h 50m
2026-06-19 CKK235 - Jun 19, 07:45 UTCJun 19, 08:34 UTC50m
2026-06-17 CKK264 - Jun 17, 23:15 UTCJun 17, 23:35 UTC20m
2026-06-17 CKK263 - Jun 17, 13:05 UTCJun 17, 20:25 UTC7h 20m
2026-06-17 CKK288 - Jun 17, 07:10 UTCJun 17, 10:30 UTC3h 20m
2026-06-16 CKK287 - Jun 16, 18:50 UTCJun 17, 04:45 UTC9h 56m
2026-06-16 CKK261 - Jun 16, 01:00 UTCJun 16, 16:50 UTC15h 50m

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 11h 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, CKK205, CKK206, CKK221, CKK216.