Apparatus

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sensors Mode-S transponder

781199

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1462 · BOEING 737-800

Hex
781199
Octal
36010631
Decimal
7,868,825
Country
CN
Tail
B-1462
Type
B738
No current signal · last broadcast Jul 26, 20:25 UTC
Flights observed
217
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 20:25 UTC

Last known position

Most recent position reported by Mode-S 781199.

Country allocation

The ICAO 24-bit address 781199 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
EPA6303 Shenzhen Donghai Airlines 13 2026-07-23
EPA6268 - 9 2026-07-26
EPA6224 - 8 2026-07-26
EPA6267 - 7 2026-07-16
EPA6238 - 7 2026-07-12
EPA6321 - 6 2026-07-13
EPA6284 - 6 2026-07-07
EPA6272 - 6 2026-07-18
EPA6237 - 6 2026-07-12
EPA6223 - 6 2026-07-26
EPA6316 - 5 2026-07-11
EPA6283 - 5 2026-07-07
EPA6274 - 5 2026-07-18
EPA6271 - 5 2026-07-17
EPA6248 Shenzhen Donghai Airlines 5 2026-07-25
EPA6241 - 5 2026-07-07
EPA6218 Shenzhen Donghai Airlines 5 2026-06-14
EPA6386 - 4 2026-05-07
EPA6385 - 4 2026-05-07
EPA6383 - 4 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EPA6224 - Jul 26, 20:10 UTCJul 26, 20:25 UTC15m
2026-07-26 EPA6223 - Jul 26, 12:25 UTCJul 26, 15:55 UTC3h 30m
2026-07-26 EPA6268 - Jul 26, 06:00 UTCJul 26, 06:20 UTC20m
2026-07-25 EPA6248 CGO → SZX Jul 25, 11:55 UTCJul 25, 12:05 UTC10m
2026-07-24 EPA6247 CGO → ZHY Jul 24, 22:55 UTCJul 24, 23:05 UTC10m
2026-07-24 EPA6364 WUX → SZX Jul 24, 18:35 UTCJul 24, 18:55 UTC20m
2026-07-24 EPA6363 SZX → WUX Jul 24, 07:25 UTCJul 24, 07:35 UTC10m
2026-07-24 EPA6406 KWE → SZX Jul 24, 05:40 UTCJul 24, 05:50 UTC10m
2026-07-24 EPA6405 SZX → KWE Jul 24, 01:20 UTCJul 24, 01:30 UTC10m
2026-07-23 EPA6258 - Jul 23, 17:00 UTCJul 23, 17:30 UTC30m
2026-07-23 EPA6313 ZUH → NKG Jul 23, 11:35 UTCJul 23, 11:50 UTC15m
2026-07-23 EPA6304 YIH → ZUH Jul 23, 10:05 UTCJul 23, 10:30 UTC25m
2026-07-23 EPA6303 ZUH → YIH Jul 23, 00:35 UTCJul 23, 00:50 UTC15m
2026-07-22 - - Jul 22, 04:35 UTCJul 22, 04:55 UTC20m
2026-07-21 EPA6257 SZX → NKG Jul 21, 23:35 UTCJul 21, 23:45 UTC10m
2026-07-21 EPA6258 - Jul 21, 18:30 UTCJul 21, 19:00 UTC30m
2026-07-21 EPA6313 - Jul 21, 13:45 UTCJul 21, 13:55 UTC10m
2026-07-21 EPA6303 - Jul 21, 00:30 UTCJul 21, 00:45 UTC15m
2026-07-20 EPA6317 ZUH → SQD Jul 20, 07:35 UTCJul 20, 07:45 UTC10m
2026-07-20 EPA6314 NKG → ZUH Jul 20, 05:40 UTCJul 20, 06:00 UTC20m
2026-07-19 EPA6270 - Jul 19, 16:05 UTCJul 19, 16:20 UTC15m
2026-07-19 EPA6269 - Jul 19, 05:35 UTCJul 19, 05:45 UTC10m
2026-07-18 EPA6279 - Jul 18, 23:15 UTCJul 18, 23:25 UTC10m
2026-07-18 EPA6274 - Jul 18, 15:00 UTCJul 18, 15:15 UTC15m
2026-07-18 EPA6272 - Jul 18, 03:15 UTCJul 18, 03:25 UTC10m
2026-07-17 EPA6271 - Jul 17, 23:20 UTCJul 17, 23:55 UTC35m
2026-07-17 EPA6224 - Jul 17, 16:04 UTCJul 17, 16:24 UTC20m
2026-07-17 EPA6224 - Jul 17, 06:50 UTCJul 17, 10:40 UTC3h 50m
2026-07-17 EPA6223 - Jul 17, 03:20 UTCJul 17, 03:30 UTC10m
2026-07-17 EPA6268 - Jul 17, 01:55 UTCJul 17, 02:10 UTC15m
2026-07-16 EPA6267 - Jul 16, 12:25 UTCJul 16, 12:34 UTC10m
2026-07-16 EPA6248 - Jul 16, 10:29 UTCJul 16, 10:55 UTC25m
2026-07-15 EPA6247 - Jul 15, 23:15 UTCJul 15, 23:30 UTC15m
2026-07-15 EPA6258 - Jul 15, 17:50 UTCJul 15, 18:05 UTC15m
2026-07-15 EPA6313 - Jul 15, 12:40 UTCJul 15, 12:50 UTC10m
2026-07-15 EPA6303 - Jul 15, 00:45 UTCJul 15, 00:55 UTC10m
2026-07-14 EPA6306 - Jul 14, 15:55 UTCJul 14, 16:15 UTC20m
2026-07-14 EPA6305 - Jul 14, 06:35 UTCJul 14, 06:50 UTC15m
2026-07-13 EPA6257 - Jul 13, 23:40 UTCJul 13, 23:50 UTC10m
2026-07-13 EPA6321 - Jul 13, 11:15 UTCJul 13, 11:25 UTC10m
2026-07-12 EPA6238 - Jul 12, 09:35 UTCJul 12, 17:30 UTC7h 55m
2026-07-12 EPA6237 - Jul 12, 02:05 UTCJul 12, 02:15 UTC10m
2026-07-12 EPA6278 - Jul 12, 00:05 UTCJul 12, 00:20 UTC15m
2026-07-11 EPA6383 - Jul 11, 15:00 UTCJul 11, 15:10 UTC10m
2026-07-11 EPA6316 - Jul 11, 13:15 UTCJul 11, 13:35 UTC20m
2026-07-11 EPA6315 - Jul 11, 02:15 UTCJul 11, 02:25 UTC10m
2026-07-11 - - Jul 11, 00:30 UTCJul 11, 00:45 UTC15m
2026-07-10 EPA6277 - Jul 10, 15:15 UTCJul 10, 15:25 UTC10m
2026-07-09 EPA6273 - Jul 9, 05:40 UTCJul 9, 05:50 UTC10m
2026-07-09 EPA6272 - Jul 9, 03:20 UTCJul 9, 03:35 UTC15m

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-1462 page for operator, model, and routing details .

Mode-S 781199 frequently asked

What is Mode-S code 781199?
781199 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1462.
Where is Mode-S 781199 registered?
Mode-S code 781199 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781199 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781199, octal 36010631, decimal 7,868,825.
What flights does 781199 operate?
Mode-S 781199 has broadcast 20 distinct callsigns, including EPA6303, EPA6268, EPA6224, EPA6267, EPA6238.