Apparatus

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sensors Mode-S transponder

78072A

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-2437 · BOEING 747-400

Hex
78072A
Octal
36003452
Decimal
7,866,154
Country
CN
Tail
B-2437
Type
B744
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
300
Distinct callsigns
9
Country
CN
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S 78072A.

Country allocation

The ICAO 24-bit address 78072A 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 9 distinct

Callsign Airline Flights Last seen
YZR7451 Yangtze River Express 145 2026-07-26
YZR7452 Yangtze River Express 78 2026-07-25
YZR7459 Yangtze River Express 35 2026-07-23
YZR7460 Yangtze River Express 19 2026-07-23
YZR7461 - 9 2026-06-18
YZR7462 - 6 2026-06-19
YZR7455 Yangtze River Express 4 2026-05-07
YZR7456 Yangtze River Express 2 2026-07-19
YZR7439 - 2 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 YZR7451 NKG → ANC Jul 26, 22:15 UTCJul 26, 22:30 UTC15m
2026-07-26 YZR7451 NKG → ANC Jul 26, 13:15 UTCJul 26, 20:40 UTC7h 25m
2026-07-25 YZR7451 NKG → ANC Jul 25, 18:35 UTCJul 26, 14:45 UTC20h 11m
2026-07-25 YZR7451 NKG → ANC Jul 25, 17:15 UTCJul 26, 14:45 UTC21h 31m
2026-07-25 YZR7452 ORD → ANC Jul 25, 12:05 UTCJul 25, 18:35 UTC6h 30m
2026-07-25 YZR7451 NKG → ANC Jul 25, 02:50 UTCJul 25, 08:05 UTC5h 15m
2026-07-24 YZR7451 NKG → ANC Jul 24, 18:10 UTCJul 25, 01:20 UTC7h 10m
2026-07-24 YZR7451 NKG → ANC Jul 24, 05:30 UTCJul 25, 01:20 UTC19h 50m
2026-07-23 YZR7451 NKG → ANC Jul 23, 22:35 UTCJul 24, 19:45 UTC21h 10m
2026-07-23 YZR7460 DFW → PVG Jul 23, 20:35 UTCJul 24, 19:45 UTC23h 10m
2026-07-23 YZR7460 DFW → PVG Jul 23, 18:35 UTCJul 24, 18:30 UTC23h 55m
2026-07-23 YZR7460 DFW → PVG Jul 23, 17:30 UTCJul 24, 05:40 UTC12h 10m
2026-07-23 YZR7459 NKG → ANC Jul 23, 09:00 UTCJul 23, 13:30 UTC4h 30m
2026-07-23 YZR7459 NKG → ANC Jul 23, 00:20 UTCJul 23, 07:35 UTC7h 15m
2026-07-19 YZR7456 LAX → PVG Jul 19, 20:45 UTCJul 20, 09:40 UTC12h 55m
2026-07-19 YZR7451 ANC → ORD Jul 19, 12:30 UTCJul 19, 17:45 UTC5h 15m
2026-07-18 YZR7451 - Jul 18, 14:35 UTCJul 19, 10:25 UTC19h 50m
2026-07-18 YZR7451 - Jul 18, 13:40 UTCJul 19, 10:25 UTC20h 45m
2026-07-18 YZR7451 - Jul 18, 10:35 UTCJul 19, 10:25 UTC23h 50m
2026-07-18 YZR7452 - Jul 18, 08:35 UTCJul 19, 04:30 UTC19h 55m
2026-07-18 YZR7452 - Jul 18, 08:20 UTCJul 19, 04:30 UTC20h 10m
2026-07-17 YZR7451 ANC → ORD Jul 17, 23:45 UTCJul 18, 04:55 UTC5h 11m
2026-07-17 YZR7451 - Jul 17, 14:44 UTCJul 17, 22:15 UTC7h 30m
2026-07-16 YZR7451 - Jul 16, 21:25 UTCJul 17, 16:15 UTC18h 50m
2026-07-16 YZR7452 - Jul 16, 08:40 UTCJul 16, 21:35 UTC12h 55m
2026-07-16 YZR7451 - Jul 16, 00:15 UTCJul 16, 05:25 UTC5h 10m
2026-07-15 YZR7451 - Jul 15, 15:00 UTCJul 15, 22:15 UTC7h 15m
2026-07-14 YZR7451 - Jul 14, 20:45 UTCJul 15, 15:15 UTC18h 29m
2026-07-14 YZR7452 - Jul 14, 07:45 UTCJul 14, 20:55 UTC13h 10m
2026-07-13 YZR7451 - Jul 13, 23:00 UTCJul 14, 04:20 UTC5h 20m
2026-07-13 YZR7451 - Jul 13, 08:35 UTCJul 13, 21:25 UTC12h 50m
2026-07-13 YZR7451 - Jul 13, 01:01 UTCJul 13, 21:25 UTC20h 25m
2026-07-12 YZR7452 - Jul 12, 20:35 UTCJul 13, 20:30 UTC23h 55m
2026-07-12 YZR7452 - Jul 12, 19:50 UTCJul 13, 15:35 UTC19h 45m
2026-07-12 YZR7451 ANC → ORD Jul 12, 10:45 UTCJul 12, 16:05 UTC5h 20m
2026-07-11 YZR7451 - Jul 11, 20:10 UTCJul 12, 09:20 UTC13h 10m
2026-07-11 YZR7452 - Jul 11, 12:40 UTCJul 12, 09:20 UTC20h 40m
2026-07-11 YZR7452 - Jul 11, 08:35 UTCJul 12, 08:30 UTC23h 55m
2026-07-11 YZR7452 - Jul 11, 07:30 UTCJul 12, 02:10 UTC18h 40m
2026-07-10 YZR7451 ANC → ORD Jul 10, 22:45 UTCJul 11, 04:01 UTC5h 15m
2026-07-10 YZR7451 - Jul 10, 13:45 UTCJul 10, 21:10 UTC7h 25m
2026-07-09 YZR7451 - Jul 9, 23:05 UTCJul 10, 21:10 UTC22h 5m
2026-07-09 YZR7452 - Jul 9, 16:35 UTCJul 10, 13:55 UTC21h 20m
2026-07-09 YZR7452 - Jul 9, 16:10 UTCJul 10, 13:55 UTC21h 45m
2026-07-09 YZR7452 - Jul 9, 10:50 UTCJul 9, 23:15 UTC12h 25m
2026-07-09 YZR7451 - Jul 9, 01:50 UTCJul 9, 07:00 UTC5h 10m
2026-07-08 YZR7451 - Jul 8, 07:10 UTCJul 8, 23:55 UTC16h 45m
2026-07-08 YZR7451 OTZ → ANC Jul 8, 00:35 UTCJul 8, 23:55 UTC23h 20m
2026-07-08 YZR7452 - Jul 8, 00:05 UTCJul 8, 16:30 UTC16h 25m
2026-07-07 YZR7452 - Jul 7, 18:35 UTCJul 8, 16:30 UTC21h 55m

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-2437 page for operator, model, and routing details .

Mode-S 78072A frequently asked

What is Mode-S code 78072A?
78072A is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-2437.
Where is Mode-S 78072A registered?
Mode-S code 78072A is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78072A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78072A, octal 36003452, decimal 7,866,154.
What flights does 78072A operate?
Mode-S 78072A has broadcast 9 distinct callsigns, including YZR7451, YZR7452, YZR7459, YZR7460, YZR7461.