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sensors Mode-S transponder

78044C

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-5539 · BOEING 737-800

Hex
78044C
Octal
36002114
Decimal
7,865,420
Country
CN
Tail
B-5539
Type
B738
No current signal · last broadcast Jul 26, 11:40 UTC
Flights observed
192
Distinct callsigns
13
Country
CN
Last broadcast
Jul 26, 11:40 UTC

Last known position

Most recent position reported by Mode-S 78044C.

Country allocation

The ICAO 24-bit address 78044C 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 13 distinct

Callsign Airline Flights Last seen
GDC7669 - 38 2026-07-23
GDC7670 - 37 2026-07-23
GDC7159 - 29 2026-07-19
GDC7885 Grand China Air 26 2026-07-26
GDC7127 - 24 2026-07-25
GDC7160 - 10 2026-07-19
GDC6265 - 8 2026-07-26
GDC6266 - 7 2026-07-26
GDC7886 Grand China Air 3 2026-07-24
GDC7174 - 3 2026-07-02
GDC7173 - 3 2026-07-09
GDC7128 - 3 2026-07-26
GDC7139 - 1 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GDC7885 PEK → HLD Jul 26, 11:30 UTCJul 26, 11:40 UTC10m
2026-07-26 GDC6266 - Jul 26, 08:50 UTCJul 26, 09:05 UTC15m
2026-07-26 GDC6265 - Jul 26, 05:00 UTCJul 26, 05:15 UTC15m
2026-07-26 GDC7128 - Jul 26, 03:00 UTCJul 26, 03:10 UTC10m
2026-07-25 GDC7127 - Jul 25, 22:45 UTCJul 25, 23:00 UTC15m
2026-07-25 GDC7885 PEK → HLD Jul 25, 12:20 UTCJul 25, 12:35 UTC15m
2026-07-25 GDC6266 - Jul 25, 08:50 UTCJul 25, 09:15 UTC25m
2026-07-25 GDC6265 - Jul 25, 05:00 UTCJul 25, 05:20 UTC20m
2026-07-25 GDC7128 - Jul 25, 03:10 UTCJul 25, 03:25 UTC15m
2026-07-24 GDC7127 - Jul 24, 22:50 UTCJul 24, 23:20 UTC30m
2026-07-24 GDC7886 HLD → PEK Jul 24, 16:50 UTCJul 24, 17:00 UTC10m
2026-07-24 GDC7885 PEK → HLD Jul 24, 12:35 UTCJul 24, 12:45 UTC10m
2026-07-24 GDC6266 - Jul 24, 10:25 UTCJul 24, 10:45 UTC20m
2026-07-24 GDC6265 - Jul 24, 05:30 UTCJul 24, 05:45 UTC15m
2026-07-23 GDC7127 - Jul 23, 22:50 UTCJul 23, 23:05 UTC15m
2026-07-23 GDC7670 - Jul 23, 15:00 UTCJul 23, 15:30 UTC30m
2026-07-23 GDC7669 - Jul 23, 11:20 UTCJul 23, 11:35 UTC15m
2026-07-23 GDC6266 - Jul 23, 09:05 UTCJul 23, 09:15 UTC10m
2026-07-23 GDC6265 - Jul 23, 05:10 UTCJul 23, 05:35 UTC25m
2026-07-22 GDC7127 - Jul 22, 22:50 UTCJul 22, 23:00 UTC10m
2026-07-22 GDC7885 PEK → HLD Jul 22, 11:20 UTCJul 22, 11:35 UTC15m
2026-07-22 GDC6265 - Jul 22, 05:00 UTCJul 22, 05:25 UTC25m
2026-07-21 GDC7127 - Jul 21, 23:00 UTCJul 21, 23:10 UTC10m
2026-07-21 GDC7670 - Jul 21, 15:35 UTCJul 21, 15:55 UTC20m
2026-07-21 GDC6266 - Jul 21, 09:00 UTCJul 21, 09:20 UTC20m
2026-07-21 GDC6265 - Jul 21, 05:05 UTCJul 21, 05:25 UTC20m
2026-07-20 GDC7127 - Jul 20, 22:55 UTCJul 20, 23:05 UTC10m
2026-07-20 GDC7885 PEK → HLD Jul 20, 12:40 UTCJul 20, 12:50 UTC10m
2026-07-20 GDC6266 - Jul 20, 09:00 UTCJul 20, 09:20 UTC20m
2026-07-20 GDC6265 - Jul 20, 05:00 UTCJul 20, 05:20 UTC20m
2026-07-19 GDC7127 - Jul 19, 22:50 UTCJul 19, 23:05 UTC15m
2026-07-19 GDC7670 - Jul 19, 15:10 UTCJul 19, 15:50 UTC40m
2026-07-19 GDC7669 - Jul 19, 11:20 UTCJul 19, 11:45 UTC25m
2026-07-19 GDC7160 - Jul 19, 06:05 UTCJul 19, 06:15 UTC10m
2026-07-19 GDC7159 - Jul 19, 01:20 UTCJul 19, 01:30 UTC10m
2026-07-18 GDC7670 - Jul 18, 15:30 UTCJul 18, 15:45 UTC15m
2026-07-18 GDC7669 - Jul 18, 11:35 UTCJul 18, 11:55 UTC20m
2026-07-18 GDC7159 - Jul 18, 01:34 UTCJul 18, 01:45 UTC10m
2026-07-17 GDC7670 - Jul 17, 15:05 UTCJul 17, 15:25 UTC20m
2026-07-17 GDC7669 - Jul 17, 11:30 UTCJul 17, 11:50 UTC20m
2026-07-16 GDC7670 - Jul 16, 15:10 UTCJul 16, 15:30 UTC20m
2026-07-16 GDC7669 - Jul 16, 11:25 UTCJul 16, 11:50 UTC25m
2026-07-16 GDC7159 - Jul 16, 01:15 UTCJul 16, 01:25 UTC10m
2026-07-15 GDC7885 - Jul 15, 11:25 UTCJul 15, 11:35 UTC10m
2026-07-15 GDC6266 - Jul 15, 09:35 UTCJul 15, 09:55 UTC20m
2026-07-15 GDC6265 - Jul 15, 06:00 UTCJul 15, 06:20 UTC20m
2026-07-14 GDC7127 - Jul 14, 22:50 UTCJul 14, 23:05 UTC15m
2026-07-14 GDC7670 - Jul 14, 15:05 UTCJul 14, 15:30 UTC25m
2026-07-14 GDC7669 - Jul 14, 11:35 UTCJul 14, 12:00 UTC25m
2026-07-14 GDC7159 - Jul 14, 01:30 UTCJul 14, 01:40 UTC10m

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-5539 page for operator, model, and routing details .

Mode-S 78044C frequently asked

What is Mode-S code 78044C?
78044C is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-5539.
Where is Mode-S 78044C registered?
Mode-S code 78044C is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78044C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78044C, octal 36002114, decimal 7,865,420.
What flights does 78044C operate?
Mode-S 78044C has broadcast 13 distinct callsigns, including GDC7669, GDC7670, GDC7159, GDC7885, GDC7127.