Apparatus

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sensors Mode-S transponder

781273

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1340 · BOEING 747-400

Hex
781273
Octal
36011163
Decimal
7,869,043
Country
CN
Tail
B-1340
Type
B744
No current signal · last broadcast 6h ago
Flights observed
87
Distinct callsigns
12
Country
CN
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 781273.

Country allocation

The ICAO 24-bit address 781273 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 12 distinct

Callsign Airline Flights Last seen
YZR7453 Yangtze River Express 26 2026-05-25
YZR7482 Yangtze River Express 19 2026-05-26
YZR7459 Yangtze River Express 8 2026-05-28
YZR7462 Yangtze River Express 7 2026-04-13
YZR7439 - 7 2026-05-29
YZR7413 Yangtze River Express 6 2026-05-01
YZR7414 - 4 2026-04-14
YZR7460 Yangtze River Express 3 2026-05-28
YZR7440 - 3 2026-05-22
YZR7455 Yangtze River Express 2 2026-05-15
YZR7461 - 1 2026-04-12
YZR7416 Yangtze River Express 1 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 YZR7439 - May 29, 00:50 UTCMay 29, 20:40 UTC19h 50m
2026-05-29 YZR7439 - May 29, 00:35 UTCMay 29, 20:40 UTC20h 5m
2026-05-28 YZR7460 DFW → PVG May 28, 12:45 UTCMay 29, 00:50 UTC12h 5m
2026-05-28 YZR7459 NKG → ANC May 28, 04:50 UTCMay 28, 09:20 UTC4h 30m
2026-05-27 YZR7459 NKG → ANC May 27, 09:45 UTCMay 28, 02:50 UTC17h 5m
2026-05-27 YZR7459 NKG → ANC May 27, 07:45 UTCMay 28, 02:50 UTC19h 5m
2026-05-27 YZR7459 NKG → ANC May 27, 04:49 UTCMay 28, 02:50 UTC22h 0m
2026-05-26 YZR7482 ORD → NKG May 26, 02:04 UTCMay 26, 20:09 UTC18h 5m
2026-05-25 YZR7482 ORD → NKG May 25, 20:50 UTCMay 26, 20:09 UTC23h 20m
2026-05-25 YZR7482 ORD → NKG May 25, 20:24 UTCMay 26, 09:25 UTC13h 0m
2026-05-25 YZR7453 ANC → ORD May 25, 09:05 UTCMay 25, 14:30 UTC5h 25m
2026-05-25 YZR7453 ANC → ORD May 25, 06:00 UTCMay 25, 07:15 UTC1h 15m
2026-05-23 YZR7460 DFW → PVG May 23, 20:15 UTCMay 24, 02:00 UTC5h 45m
2026-05-23 YZR7459 NKG → ANC May 23, 12:25 UTCMay 23, 17:05 UTC4h 40m
2026-05-23 YZR7459 NKG → ANC May 23, 09:30 UTCMay 23, 10:45 UTC1h 15m
2026-05-22 YZR7440 - May 22, 09:45 UTCMay 22, 10:35 UTC50m
2026-05-21 YZR7439 - May 21, 06:50 UTCMay 22, 00:55 UTC18h 5m
2026-05-21 YZR7440 - May 21, 05:40 UTCMay 22, 00:55 UTC19h 15m
2026-05-21 YZR7439 - May 21, 02:25 UTCMay 21, 02:40 UTC15m
2026-05-20 YZR7439 - May 20, 20:55 UTCMay 20, 21:15 UTC20m
2026-05-18 YZR7460 DFW → PVG May 18, 16:10 UTCMay 19, 04:40 UTC12h 29m
2026-05-18 YZR7459 NKG → ANC May 18, 07:55 UTCMay 18, 12:05 UTC4h 10m
2026-05-17 YZR7459 NKG → ANC May 17, 23:05 UTCMay 18, 06:25 UTC7h 20m
2026-05-17 YZR7440 - May 17, 04:50 UTCMay 18, 04:45 UTC23h 55m
2026-05-16 YZR7439 - May 16, 19:30 UTCMay 17, 01:20 UTC5h 50m
2026-05-16 YZR7439 - May 16, 04:50 UTCMay 17, 01:20 UTC20h 30m
2026-05-16 YZR7482 ORD → NKG May 16, 03:50 UTCMay 17, 01:20 UTC21h 30m
2026-05-15 YZR7482 ORD → NKG May 15, 22:50 UTCMay 16, 20:00 UTC21h 11m
2026-05-15 YZR7482 ORD → NKG May 15, 22:15 UTCMay 16, 20:00 UTC21h 46m
2026-05-15 YZR7455 PVG → ANC May 15, 12:30 UTCMay 15, 18:15 UTC5h 44m
2026-05-15 YZR7455 PVG → ANC May 15, 02:35 UTCMay 15, 10:05 UTC7h 30m
2026-05-02 YZR7416 AMS → PVG May 2, 13:20 UTCMay 2, 19:05 UTC5h 45m
2026-05-01 YZR7413 AMS → AMS May 1, 17:00 UTCMay 2, 08:30 UTC15h 30m
2026-05-01 YZR7413 AMS → AMS May 1, 10:50 UTCMay 2, 08:30 UTC21h 40m
2026-05-01 YZR7413 AMS → AMS May 1, 09:50 UTCMay 2, 08:30 UTC22h 40m
2026-05-01 YZR7482 ORD → NKG May 1, 04:50 UTCMay 2, 04:45 UTC23h 55m
2026-05-01 YZR7482 ORD → NKG May 1, 04:00 UTCMay 2, 02:45 UTC22h 45m
2026-04-30 YZR7453 ANC → ORD Apr 30, 18:20 UTCMay 1, 00:05 UTC5h 45m
2026-04-30 YZR7453 ANC → ORD Apr 30, 04:35 UTCApr 30, 16:55 UTC12h 20m
2026-04-29 YZR7453 ANC → ORD Apr 29, 20:50 UTCApr 30, 16:55 UTC20h 4m
2026-04-29 YZR7453 ANC → ORD Apr 29, 20:35 UTCApr 30, 16:55 UTC20h 19m
2026-04-29 YZR7482 ORD → NKG Apr 29, 16:50 UTCApr 30, 16:45 UTC23h 54m
2026-04-29 YZR7482 ORD → NKG Apr 29, 15:35 UTCApr 30, 11:00 UTC19h 24m
2026-04-29 YZR7453 ANC → ORD Apr 29, 06:55 UTCApr 29, 12:05 UTC5h 11m
2026-04-28 YZR7453 ANC → ORD Apr 28, 21:00 UTCApr 29, 03:45 UTC6h 45m
2026-04-20 YZR7482 ORD → NKG Apr 20, 19:35 UTCApr 21, 09:25 UTC13h 50m
2026-04-20 YZR7453 ANC → ORD Apr 20, 10:30 UTCApr 20, 15:40 UTC5h 10m
2026-04-19 YZR7453 ANC → ORD Apr 19, 16:45 UTCApr 20, 08:50 UTC16h 5m
2026-04-19 YZR7453 ANC → ORD Apr 19, 09:30 UTCApr 20, 08:45 UTC23h 15m
2026-04-19 YZR7482 ORD → NKG Apr 19, 04:50 UTCApr 20, 02:55 UTC22h 5m

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-1340 page for operator, model, and routing details .

Mode-S 781273 frequently asked

What is Mode-S code 781273?
781273 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1340.
Where is Mode-S 781273 registered?
Mode-S code 781273 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781273 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781273, octal 36011163, decimal 7,869,043.
What flights does 781273 operate?
Mode-S 781273 has broadcast 12 distinct callsigns, including YZR7453, YZR7482, YZR7459, YZR7462, YZR7439.