Apparatus

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sensors Mode-S transponder

78123E

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-7300 · BOEING 737-800

Hex
78123E
Octal
36011076
Decimal
7,868,990
Country
CN
Tail
B-7300
Type
B738
No current signal · last broadcast Jul 23, 05:00 UTC
Flights observed
116
Distinct callsigns
20
Country
CN
Last broadcast
Jul 23, 05:00 UTC

Last known position

Most recent position reported by Mode-S 78123E.

Country allocation

The ICAO 24-bit address 78123E 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
EPA6315 Shenzhen Donghai Airlines 7 2026-07-20
EPA6316 - 6 2026-07-20
EPA6303 Shenzhen Donghai Airlines 5 2026-04-25
EPA6386 - 4 2026-04-25
EPA6385 - 4 2026-04-25
EPA6383 - 4 2026-07-20
EPA6299 Shenzhen Donghai Airlines 4 2026-06-17
EPA6277 - 4 2026-07-21
EPA6267 - 4 2026-07-18
EPA6390 Shenzhen Donghai Airlines 3 2026-04-22
EPA6389 Shenzhen Donghai Airlines 3 2026-04-22
EPA6321 - 3 2026-07-04
EPA6317 Shenzhen Donghai Airlines 3 2026-04-22
EPA6284 - 3 2026-07-19
EPA6283 Shenzhen Donghai Airlines 3 2026-07-19
EPA6218 - 3 2026-07-04
EPA6217 - 3 2026-07-03
EPA6328 Shenzhen Donghai Airlines 2 2026-06-26
EPA6327 Shenzhen Donghai Airlines 2 2026-06-10
EPA6322 - 2 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 EPA6272 - Jul 23, 04:35 UTCJul 23, 05:00 UTC25m
2026-07-23 EPA6271 - Jul 23, 00:50 UTCJul 23, 01:30 UTC40m
2026-07-22 EPA6238 NTG → SZX Jul 22, 14:10 UTCJul 22, 14:25 UTC15m
2026-07-21 EPA6277 - Jul 21, 18:05 UTCJul 21, 18:20 UTC15m
2026-07-21 EPA6232 - Jul 21, 15:55 UTCJul 21, 16:20 UTC25m
2026-07-21 EPA6278 - Jul 21, 00:15 UTCJul 21, 00:30 UTC15m
2026-07-20 EPA6383 - Jul 20, 16:15 UTCJul 20, 16:25 UTC10m
2026-07-20 EPA6316 - Jul 20, 14:15 UTCJul 20, 15:00 UTC45m
2026-07-20 EPA6315 ZUH → NTG Jul 20, 02:45 UTCJul 20, 03:00 UTC15m
2026-07-19 EPA6277 - Jul 19, 15:20 UTCJul 19, 15:35 UTC15m
2026-07-19 EPA6284 - Jul 19, 12:05 UTCJul 19, 12:25 UTC20m
2026-07-19 EPA6283 SZX → SHS Jul 19, 03:15 UTCJul 19, 03:25 UTC10m
2026-07-19 EPA6268 - Jul 19, 01:30 UTCJul 19, 01:45 UTC15m
2026-07-18 EPA6267 - Jul 18, 12:20 UTCJul 18, 12:35 UTC15m
2026-07-18 EPA6248 - Jul 18, 10:15 UTCJul 18, 10:40 UTC25m
2026-07-17 EPA6270 - Jul 17, 16:15 UTCJul 17, 16:34 UTC20m
2026-07-17 EPA6269 - Jul 17, 05:39 UTCJul 17, 05:55 UTC15m
2026-07-17 EPA6280 - Jul 17, 04:14 UTCJul 17, 04:29 UTC15m
2026-07-16 EPA6232 - Jul 16, 15:49 UTCJul 16, 16:00 UTC10m
2026-07-16 EPA6231 - Jul 16, 03:50 UTCJul 16, 04:00 UTC10m
2026-07-15 EPA6256 - Jul 15, 14:35 UTCJul 15, 15:00 UTC25m
2026-07-15 EPA6255 - Jul 15, 03:30 UTCJul 15, 03:40 UTC10m
2026-07-14 EPA6274 - Jul 14, 16:50 UTCJul 14, 17:25 UTC35m
2026-07-14 EPA6273 - Jul 14, 07:25 UTCJul 14, 07:35 UTC10m
2026-07-13 EPA6267 - Jul 13, 12:25 UTCJul 13, 12:40 UTC15m
2026-07-12 EPA6253 - Jul 12, 23:20 UTCJul 12, 23:35 UTC15m
2026-07-12 EPA7300 - Jul 12, 15:40 UTCJul 12, 16:10 UTC30m
2026-07-12 EPA6316 - Jul 12, 13:55 UTCJul 12, 14:45 UTC50m
2026-07-12 EPA6315 - Jul 12, 03:05 UTCJul 12, 03:20 UTC15m
2026-07-11 EPA6277 - Jul 11, 15:15 UTCJul 11, 15:25 UTC10m
2026-07-11 EPA6284 - Jul 11, 12:50 UTCJul 11, 13:20 UTC30m
2026-07-11 EPA6283 - Jul 11, 03:15 UTCJul 11, 03:30 UTC15m
2026-07-10 EPA6267 - Jul 10, 12:30 UTCJul 10, 12:40 UTC10m
2026-07-09 EPA6253 - Jul 9, 23:05 UTCJul 9, 23:15 UTC10m
2026-07-09 EPA6255 - Jul 9, 02:05 UTCJul 9, 02:20 UTC15m
2026-07-09 EPA6278 - Jul 9, 00:25 UTCJul 9, 00:40 UTC15m
2026-07-08 EPA6316 - Jul 8, 17:05 UTCJul 8, 18:05 UTC1h 0m
2026-07-08 EPA6315 - Jul 8, 02:20 UTCJul 8, 02:30 UTC10m
2026-07-07 EPA6310 NTG → ZUH Jul 7, 04:10 UTCJul 7, 16:55 UTC12h 45m
2026-07-07 EPA6309 - Jul 7, 02:50 UTCJul 7, 03:05 UTC15m
2026-07-06 EPA6277 - Jul 6, 16:55 UTCJul 6, 17:05 UTC10m
2026-07-06 EPA6284 - Jul 6, 15:05 UTCJul 6, 15:15 UTC10m
2026-07-06 EPA6283 - Jul 6, 03:30 UTCJul 6, 03:40 UTC10m
2026-07-06 EPA6268 - Jul 6, 01:25 UTCJul 6, 01:35 UTC10m
2026-07-05 EPA6267 - Jul 5, 13:50 UTCJul 5, 14:00 UTC10m
2026-07-05 EPA6244 - Jul 5, 10:55 UTCJul 5, 11:25 UTC30m
2026-07-05 EPA6243 - Jul 5, 00:10 UTCJul 5, 00:20 UTC10m
2026-07-04 EPA6218 - Jul 4, 20:05 UTCJul 4, 20:15 UTC10m
2026-07-04 EPA6321 - Jul 4, 12:00 UTCJul 4, 12:15 UTC15m
2026-07-04 EPA6322 - Jul 4, 05:55 UTCJul 4, 06:10 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-7300 page for operator, model, and routing details .

Mode-S 78123E frequently asked

What is Mode-S code 78123E?
78123E is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-7300.
Where is Mode-S 78123E registered?
Mode-S code 78123E is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78123E broadcasting right now?
No active broadcast right now. Last signal was Jul 23, 05:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78123E, octal 36011076, decimal 7,868,990.
What flights does 78123E operate?
Mode-S 78123E has broadcast 20 distinct callsigns, including EPA6315, EPA6316, EPA6303, EPA6386, EPA6385.