Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781454

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1151 · BOEING 737-800

Hex
781454
Octal
36012124
Decimal
7,869,524
Country
CN
Tail
B-1151
Type
B738
No current signal · last broadcast Jul 26, 10:45 UTC
Flights observed
146
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 10:45 UTC

Last known position

Most recent position reported by Mode-S 781454.

Country allocation

The ICAO 24-bit address 781454 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
CUA5677 - 25 2026-07-21
CUA5678 - 24 2026-07-22
CUA5612 China United Airlines 20 2026-07-23
CUA5611 China United Airlines 19 2026-07-23
CUA5519 China United Airlines 18 2026-07-22
CUA5876 China United Airlines 7 2026-06-12
CUA5520 China United Airlines 5 2026-07-20
CUA5858 China United Airlines 4 2026-05-13
CUA5857 China United Airlines 3 2026-05-13
CUA5561 - 3 2026-07-23
CUA5529 - 3 2026-07-24
CUA5630 China United Airlines 2 2026-05-28
CUA5530 - 2 2026-06-12
CUA5971 China United Airlines 1 2026-06-03
CUA5930 China United Airlines 1 2026-07-24
CUA5875 China United Airlines 1 2026-05-26
CUA5865 China United Airlines 1 2026-07-25
CUA5818 - 1 2026-06-28
CUA5652 - 1 2026-05-09
CUA5651 - 1 2026-05-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CUA5521 PKX → HLD Jul 26, 10:35 UTCJul 26, 10:45 UTC10m
2026-07-25 CUA5865 PKX → FUO Jul 25, 11:00 UTCJul 26, 01:05 UTC14h 5m
2026-07-24 CUA5529 - Jul 24, 10:25 UTCJul 24, 10:40 UTC15m
2026-07-24 CUA5930 YYA → PKX Jul 24, 08:00 UTCJul 24, 08:30 UTC30m
2026-07-23 CUA5561 - Jul 23, 11:30 UTCJul 23, 11:40 UTC10m
2026-07-23 CUA5612 URC → PKX Jul 23, 09:10 UTCJul 23, 09:25 UTC15m
2026-07-23 CUA5611 PKX → URC Jul 23, 00:45 UTCJul 23, 01:00 UTC15m
2026-07-22 CUA5678 - Jul 22, 18:05 UTCJul 22, 18:15 UTC10m
2026-07-22 CUA5519 PKX → LDS Jul 22, 02:55 UTCJul 22, 03:10 UTC15m
2026-07-21 CUA5678 - Jul 21, 14:50 UTCJul 21, 15:00 UTC10m
2026-07-21 CUA5677 - Jul 21, 06:25 UTCJul 21, 06:40 UTC15m
2026-07-20 CUA5519 PKX → LDS Jul 20, 23:40 UTCJul 20, 23:55 UTC15m
2026-07-20 CUA5678 - Jul 20, 17:55 UTCJul 20, 18:05 UTC10m
2026-07-20 CUA5677 - Jul 20, 09:00 UTCJul 20, 09:20 UTC20m
2026-07-20 CUA5520 LDS → PKX Jul 20, 04:05 UTCJul 20, 04:15 UTC10m
2026-07-19 CUA5519 PKX → LDS Jul 19, 23:25 UTCJul 19, 23:35 UTC10m
2026-07-19 CUA5678 - Jul 19, 15:00 UTCJul 19, 15:10 UTC10m
2026-07-19 CUA5677 - Jul 19, 06:20 UTCJul 19, 06:35 UTC15m
2026-07-18 CUA5678 - Jul 18, 14:40 UTCJul 18, 14:55 UTC15m
2026-07-18 CUA5677 - Jul 18, 06:15 UTCJul 18, 06:25 UTC10m
2026-07-17 CUA5519 - Jul 17, 23:25 UTCJul 17, 23:35 UTC10m
2026-07-17 CUA5561 - Jul 17, 11:20 UTCJul 17, 11:30 UTC10m
2026-07-17 CUA5612 - Jul 17, 08:59 UTCJul 17, 09:15 UTC15m
2026-07-17 CUA5611 - Jul 17, 00:45 UTCJul 17, 01:00 UTC15m
2026-07-16 CUA5525 - Jul 16, 00:20 UTCJul 16, 00:35 UTC15m
2026-07-15 CUA5678 - Jul 15, 14:35 UTCJul 15, 14:50 UTC15m
2026-07-15 CUA5677 - Jul 15, 06:20 UTCJul 15, 06:35 UTC15m
2026-07-15 CUA5520 - Jul 15, 04:05 UTCJul 15, 04:15 UTC10m
2026-07-14 CUA5519 - Jul 14, 23:25 UTCJul 14, 23:35 UTC10m
2026-07-14 CUA5561 - Jul 14, 11:15 UTCJul 14, 11:30 UTC15m
2026-07-14 CUA5612 - Jul 14, 08:55 UTCJul 14, 09:10 UTC15m
2026-07-14 CUA5611 - Jul 14, 00:55 UTCJul 14, 01:05 UTC10m
2026-07-13 CUA5678 - Jul 13, 14:35 UTCJul 13, 14:45 UTC10m
2026-07-13 CUA5677 - Jul 13, 06:20 UTCJul 13, 06:30 UTC10m
2026-07-12 CUA5519 - Jul 12, 23:25 UTCJul 12, 23:35 UTC10m
2026-07-12 CUA5678 - Jul 12, 14:35 UTCJul 12, 14:50 UTC15m
2026-07-12 CUA5677 - Jul 12, 06:25 UTCJul 12, 06:40 UTC15m
2026-07-12 CUA5520 - Jul 12, 04:05 UTCJul 12, 04:15 UTC10m
2026-07-11 CUA5612 - Jul 11, 09:05 UTCJul 11, 09:30 UTC25m
2026-07-11 CUA5611 - Jul 11, 00:45 UTCJul 11, 00:55 UTC10m
2026-07-10 CUA5678 - Jul 10, 14:55 UTCJul 10, 15:10 UTC15m
2026-07-10 CUA5677 - Jul 10, 06:35 UTCJul 10, 06:50 UTC15m
2026-07-09 CUA5519 - Jul 9, 23:25 UTCJul 9, 23:40 UTC15m
2026-07-09 CUA5678 - Jul 9, 14:55 UTCJul 9, 15:05 UTC10m
2026-07-09 CUA5677 - Jul 9, 06:40 UTCJul 9, 06:55 UTC15m
2026-07-08 CUA5519 - Jul 8, 23:20 UTCJul 8, 23:35 UTC15m
2026-07-08 CUA5678 - Jul 8, 15:40 UTCJul 8, 15:50 UTC10m
2026-07-07 CUA5519 - Jul 7, 23:25 UTCJul 7, 23:40 UTC15m
2026-07-07 CUA5678 - Jul 7, 15:15 UTCJul 7, 15:25 UTC10m
2026-07-07 CUA5677 - Jul 7, 06:20 UTCJul 7, 06:40 UTC20m

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-1151 page for operator, model, and routing details .

Mode-S 781454 frequently asked

What is Mode-S code 781454?
781454 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1151.
Where is Mode-S 781454 registered?
Mode-S code 781454 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781454 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 10:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781454, octal 36012124, decimal 7,869,524.
What flights does 781454 operate?
Mode-S 781454 has broadcast 20 distinct callsigns, including CUA5677, CUA5678, CUA5612, CUA5611, CUA5519.