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
Broadcasting now · callsign YZR7453 · 35,000 ft
Flights observed
194
Distinct callsigns
15
Country
CN
Last broadcast
11m ago

Current position

781273 is currently broadcasting. Map zoomed to live position.

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 15 distinct

Callsign Airline Flights Last seen
YZR7453 - 72 2026-07-14
YZR7482 - 40 2026-07-12
YZR7439 - 26 2026-07-04
YZR7462 Yangtze River Express 12 2026-06-15
YZR7461 Yangtze River Express 8 2026-06-14
YZR7459 Yangtze River Express 8 2026-05-28
YZR7440 - 7 2026-06-19
YZR7413 Yangtze River Express 6 2026-05-01
YZR7455 - 4 2026-07-10
YZR7414 - 4 2026-04-14
YZR7460 Yangtze River Express 3 2026-05-28
YZR7499 - 1 2026-06-23
YZR7456 - 1 2026-07-06
YZR7441 - 1 2026-06-23
YZR7416 Yangtze River Express 1 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 YZR7453 - Jul 14, 03:10 UTCJul 14, 06:45 UTC3h 35m
2026-07-13 YZR7453 - Jul 13, 12:30 UTCJul 14, 01:25 UTC12h 55m
2026-07-13 YZR7453 - Jul 13, 05:05 UTCJul 14, 01:25 UTC20h 20m
2026-07-13 YZR7453 - Jul 13, 00:50 UTCJul 14, 00:45 UTC23h 55m
2026-07-12 YZR7482 - Jul 12, 23:45 UTCJul 13, 19:35 UTC19h 50m
2026-07-12 YZR7453 ANC → ORD Jul 12, 15:01 UTCJul 12, 20:20 UTC5h 20m
2026-07-12 YZR7453 - Jul 12, 06:15 UTCJul 12, 13:40 UTC7h 25m
2026-07-11 YZR7453 - Jul 11, 16:50 UTCJul 12, 13:40 UTC20h 50m
2026-07-10 YZR7482 - Jul 10, 16:00 UTCJul 11, 08:30 UTC16h 30m
2026-07-10 YZR7482 - Jul 10, 10:50 UTCJul 11, 08:30 UTC21h 40m
2026-07-10 YZR7455 ANC → ORD Jul 10, 02:10 UTCJul 10, 07:30 UTC5h 20m
2026-07-09 YZR7455 - Jul 9, 16:55 UTCJul 10, 00:25 UTC7h 30m
2026-07-06 YZR7456 - Jul 6, 13:05 UTCJul 7, 01:55 UTC12h 50m
2026-07-06 YZR7453 - Jul 6, 04:30 UTCJul 6, 09:45 UTC5h 15m
2026-07-05 YZR7453 - Jul 5, 09:05 UTCJul 6, 03:00 UTC17h 55m
2026-07-05 YZR7453 - Jul 5, 04:50 UTCJul 6, 03:00 UTC22h 10m
2026-07-05 YZR7453 - Jul 5, 04:05 UTCJul 6, 02:45 UTC22h 40m
2026-07-04 YZR7439 - Jul 4, 23:55 UTCJul 5, 00:10 UTC15m
2026-07-04 YZR7439 - Jul 4, 18:30 UTCJul 4, 19:00 UTC30m
2026-07-03 YZR7439 - Jul 3, 23:45 UTCJul 4, 19:00 UTC19h 15m
2026-07-03 YZR7482 - Jul 3, 11:30 UTCJul 3, 23:55 UTC12h 25m
2026-07-02 YZR7453 ANC → ORD Jul 2, 16:10 UTCJul 2, 21:55 UTC5h 45m
2026-07-01 YZR7453 - Jul 1, 23:20 UTCJul 2, 14:50 UTC15h 30m
2026-07-01 YZR7453 - Jul 1, 18:50 UTCJul 2, 14:50 UTC20h 0m
2026-07-01 YZR7453 - Jul 1, 18:25 UTCJul 2, 14:50 UTC20h 25m
2026-06-30 YZR7439 - Jun 30, 21:45 UTCJul 1, 12:45 UTC15h 0m
2026-06-30 YZR7439 - Jun 30, 14:50 UTCJul 1, 12:45 UTC21h 55m
2026-06-30 YZR7482 - Jun 30, 14:35 UTCJul 1, 12:45 UTC22h 10m
2026-06-30 YZR7482 - Jun 30, 10:50 UTCJul 1, 07:25 UTC20h 35m
2026-06-30 YZR7482 - Jun 30, 09:50 UTCJul 1, 07:25 UTC21h 35m
2026-06-30 YZR7453 - Jun 30, 00:39 UTCJun 30, 06:20 UTC5h 40m
2026-06-29 YZR7453 - Jun 29, 09:40 UTCJun 29, 23:05 UTC13h 25m
2026-06-29 YZR7453 - Jun 29, 02:50 UTCJun 29, 23:05 UTC20h 15m
2026-06-29 YZR7453 - Jun 29, 02:25 UTCJun 29, 23:05 UTC20h 40m
2026-06-28 YZR7453 - Jun 28, 22:49 UTCJun 29, 22:44 UTC23h 55m
2026-06-28 YZR7482 - Jun 28, 21:20 UTCJun 29, 17:10 UTC19h 50m
2026-06-28 YZR7453 - Jun 28, 12:25 UTCJun 28, 18:10 UTC5h 45m
2026-06-28 YZR7453 - Jun 28, 02:54 UTCJun 28, 09:50 UTC6h 55m
2026-06-27 YZR7453 - Jun 27, 06:50 UTCJun 28, 04:20 UTC21h 30m
2026-06-27 YZR7453 - Jun 27, 05:49 UTCJun 28, 04:20 UTC22h 30m
2026-06-26 YZR7482 - Jun 26, 01:50 UTCJun 26, 20:15 UTC18h 25m
2026-06-25 YZR7482 - Jun 25, 20:49 UTCJun 26, 20:15 UTC23h 25m
2026-06-25 YZR7482 - Jun 25, 20:39 UTCJun 26, 09:30 UTC12h 50m
2026-06-25 YZR7453 ANC → ORD Jun 25, 03:34 UTCJun 25, 09:10 UTC5h 35m
2026-06-24 YZR7453 - Jun 24, 18:25 UTCJun 25, 01:54 UTC7h 30m
2026-06-24 YZR7453 - Jun 24, 04:50 UTCJun 25, 01:54 UTC21h 5m
2026-06-24 YZR7453 - Jun 24, 04:20 UTCJun 25, 01:54 UTC21h 35m
2026-06-24 YZR7453 - Jun 24, 00:49 UTCJun 25, 00:44 UTC23h 55m
2026-06-23 YZR7441 - Jun 23, 23:19 UTCJun 24, 19:49 UTC20h 30m
2026-06-23 YZR7499 - Jun 23, 18:39 UTCJun 23, 19:50 UTC1h 10m

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?
Yes. Mode-S 781273 is currently airborne.
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 15 distinct callsigns, including YZR7453, YZR7482, YZR7439, YZR7462, YZR7461.