Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781ED4

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-223A · BOEING 777-200LR

Hex
781ED4
Octal
36017324
Decimal
7,872,212
Country
CN
Tail
B-223A
Type
B77L
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
215
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S 781ED4.

Country allocation

The ICAO 24-bit address 781ED4 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
CKK227 - 18 2026-07-09
CKK222 China Cargo Airlines 12 2026-05-25
CKK232 China Cargo Airlines 11 2026-07-23
CKK225 China Cargo Airlines 11 2026-05-19
CKK231 China Cargo Airlines 10 2026-07-22
CKK621 - 9 2026-07-12
CKK602 - 9 2026-07-16
CKK601 - 9 2026-07-15
CKK223 China Cargo Airlines 8 2026-07-20
CKK228 - 7 2026-07-01
CKK224 - 7 2026-07-21
CKK205 - 7 2026-07-03
CKK624 China Cargo Airlines 6 2026-07-20
CKK623 China Cargo Airlines 6 2026-07-19
CKK235 - 6 2026-07-14
CKK221 China Cargo Airlines 6 2026-05-24
CKK215 China Cargo Airlines 6 2026-07-26
CKK204 - 6 2026-07-08
CKK203 - 6 2026-07-08
CKK263 China Cargo Airlines 5 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CKK216 CDG → PVG Jul 26, 17:50 UTCJul 26, 23:00 UTC5h 10m
2026-07-26 CKK215 PVG → CDG Jul 26, 08:25 UTCJul 26, 14:40 UTC6h 15m
2026-07-25 CKK288 - Jul 25, 13:00 UTCJul 25, 13:10 UTC10m
2026-07-25 CKK288 - Jul 25, 07:40 UTCJul 25, 08:05 UTC25m
2026-07-25 CKK287 PVG → SIN Jul 25, 02:20 UTCJul 25, 05:25 UTC3h 5m
2026-07-24 CKK288 - Jul 24, 16:40 UTCJul 24, 16:50 UTC10m
2026-07-24 CKK288 - Jul 24, 11:20 UTCJul 24, 14:25 UTC3h 5m
2026-07-24 CKK287 PVG → SIN Jul 24, 05:55 UTCJul 24, 09:25 UTC3h 30m
2026-07-23 CKK232 JFK → PVG Jul 23, 12:50 UTCJul 24, 09:25 UTC20h 35m
2026-07-22 CKK232 JFK → PVG Jul 22, 23:50 UTCJul 23, 13:40 UTC13h 50m
2026-07-22 CKK231 PVG → SEA Jul 22, 14:10 UTCJul 22, 20:20 UTC6h 10m
2026-07-21 CKK224 - Jul 21, 20:30 UTCJul 22, 12:55 UTC16h 25m
2026-07-21 CKK224 - Jul 21, 15:05 UTCJul 22, 12:55 UTC21h 50m
2026-07-21 CKK224 - Jul 21, 14:00 UTCJul 22, 12:55 UTC22h 55m
2026-07-21 CKK224 - Jul 21, 11:15 UTCJul 22, 05:25 UTC18h 10m
2026-07-20 CKK223 PVG → LAX Jul 20, 20:20 UTCJul 21, 08:40 UTC12h 20m
2026-07-20 CKK223 PVG → LAX Jul 20, 11:05 UTCJul 21, 08:40 UTC21h 34m
2026-07-20 CKK223 PVG → LAX Jul 20, 10:05 UTCJul 21, 08:40 UTC22h 35m
2026-07-20 CKK624 LAX → PVG Jul 20, 01:05 UTCJul 20, 22:40 UTC21h 35m
2026-07-20 CKK624 LAX → PVG Jul 20, 00:15 UTCJul 20, 22:40 UTC22h 25m
2026-07-19 CKK623 PVG → LAX Jul 19, 04:30 UTCJul 19, 15:45 UTC11h 15m
2026-07-18 CKK623 PVG → LAX Jul 18, 17:25 UTCJul 19, 15:45 UTC22h 20m
2026-07-18 CKK623 PVG → LAX Jul 18, 15:05 UTCJul 19, 15:00 UTC23h 55m
2026-07-18 CKK606 - Jul 18, 11:50 UTCJul 19, 06:15 UTC18h 25m
2026-07-18 CKK605 - Jul 18, 01:50 UTCJul 18, 08:40 UTC6h 51m
2026-07-16 CKK602 - Jul 16, 14:35 UTCJul 16, 20:19 UTC5h 45m
2026-07-15 CKK601 - Jul 15, 17:15 UTCJul 16, 11:34 UTC18h 20m
2026-07-15 CKK601 - Jul 15, 13:05 UTCJul 16, 11:34 UTC22h 30m
2026-07-15 CKK236 - Jul 15, 11:35 UTCJul 16, 10:59 UTC23h 25m
2026-07-14 CKK235 - Jul 14, 13:50 UTCJul 15, 08:05 UTC18h 14m
2026-07-14 CKK235 - Jul 14, 09:05 UTCJul 15, 08:05 UTC22h 59m
2026-07-14 CKK602 - Jul 14, 08:15 UTCJul 15, 07:00 UTC22h 44m
2026-07-13 CKK601 - Jul 13, 23:15 UTCJul 14, 05:20 UTC6h 5m
2026-07-12 CKK622 - Jul 12, 16:10 UTCJul 12, 19:10 UTC3h 0m
2026-07-12 CKK621 ANC → YYZ Jul 12, 07:20 UTCJul 12, 12:55 UTC5h 35m
2026-07-11 CKK621 - Jul 11, 22:40 UTCJul 12, 06:05 UTC7h 25m
2026-07-10 CKK228A - Jul 10, 06:05 UTCJul 10, 18:50 UTC12h 45m
2026-07-09 CKK227 ANC → ORD Jul 9, 21:25 UTCJul 10, 03:30 UTC6h 5m
2026-07-09 CKK227 - Jul 9, 12:20 UTCJul 9, 20:05 UTC7h 45m
2026-07-08 CKK227 - Jul 8, 19:05 UTCJul 9, 19:00 UTC23h 55m
2026-07-08 CKK227 - Jul 8, 18:35 UTCJul 9, 14:35 UTC20h 0m
2026-07-08 CKK227 - Jul 8, 15:05 UTCJul 9, 14:35 UTC23h 30m
2026-07-08 CKK204 - Jul 8, 13:05 UTCJul 9, 13:00 UTC23h 55m
2026-07-08 CKK204 - Jul 8, 12:40 UTCJul 8, 19:15 UTC6h 35m
2026-07-08 CKK203 - Jul 8, 02:30 UTCJul 8, 09:20 UTC6h 50m
2026-07-07 CKK203 - Jul 7, 07:05 UTCJul 8, 06:05 UTC23h 0m
2026-07-07 CKK626 - Jul 7, 06:10 UTCJul 8, 05:00 UTC22h 50m
2026-07-07 CKK626 - Jul 7, 00:20 UTCJul 7, 07:10 UTC6h 50m
2026-07-06 CKK625 ANC → ORD Jul 6, 16:00 UTCJul 6, 21:40 UTC5h 40m
2026-07-05 CKK625 - Jul 5, 19:05 UTCJul 6, 14:45 UTC19h 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-223A page for operator, model, and routing details .

Mode-S 781ED4 frequently asked

What is Mode-S code 781ED4?
781ED4 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-223A.
Where is Mode-S 781ED4 registered?
Mode-S code 781ED4 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781ED4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781ED4, octal 36017324, decimal 7,872,212.
What flights does 781ED4 operate?
Mode-S 781ED4 has broadcast 20 distinct callsigns, including CKK227, CKK222, CKK232, CKK225, CKK231.