Apparatus

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sensors Mode-S transponder

78179B

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-20CX · BOEING 757-200

Hex
78179B
Octal
36013633
Decimal
7,870,363
Country
CN
Tail
B-20CX
Type
B752
No current signal · last broadcast Jul 26, 22:35 UTC
Flights observed
161
Distinct callsigns
19
Country
CN
Last broadcast
Jul 26, 22:35 UTC

Last known position

Most recent position reported by Mode-S 78179B.

Country allocation

The ICAO 24-bit address 78179B 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 19 distinct

Callsign Airline Flights Last seen
YZR7912 - 70 2026-07-17
YZR7911 - 56 2026-07-17
CSS326 SF Airlines 6 2026-07-26
CSS7110 SF Airlines 4 2026-04-16
CSS7109 - 4 2026-04-16
CSS325 SF Airlines 4 2026-07-25
CSS6864 - 2 2026-06-28
CSS6828 SF Airlines 2 2026-07-24
CSS6814 SF Airlines 2 2026-04-20
CSS317 SF Airlines 2 2026-04-22
CSS7277 - 1 2026-07-23
CSS7224 SF Airlines 1 2026-07-26
CSS6846 SF Airlines 1 2026-04-24
CSS6836 SF Airlines 1 2026-07-26
CSS6827 SF Airlines 1 2026-07-24
CSS6805 SF Airlines 1 2026-04-25
CSS358 SF Airlines 1 2026-07-24
CSS357 SF Airlines 1 2026-07-23
CSS318 - 1 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSS6836 HGH → SZX Jul 26, 22:15 UTCJul 26, 22:35 UTC20m
2026-07-26 CSS7224 SZX → HGH Jul 26, 18:00 UTCJul 26, 18:10 UTC10m
2026-07-26 CSS326 MNL → SZX Jul 26, 05:50 UTCJul 26, 06:00 UTC10m
2026-07-26 CSS326 MNL → SZX Jul 26, 04:00 UTCJul 26, 04:35 UTC35m
2026-07-25 CSS325 SZX → MNL Jul 25, 17:25 UTCJul 25, 18:00 UTC35m
2026-07-25 CSS325 SZX → MNL Jul 25, 16:05 UTCJul 25, 16:30 UTC25m
2026-07-24 CSS6828 PVG → SZX Jul 24, 21:25 UTCJul 24, 22:45 UTC1h 20m
2026-07-24 CSS6827 SZX → PVG Jul 24, 17:20 UTCJul 24, 17:30 UTC10m
2026-07-24 CSS358 TPE → SZX Jul 24, 01:30 UTCJul 24, 02:50 UTC1h 20m
2026-07-23 CSS357 SZX → TPE Jul 23, 22:05 UTCJul 23, 23:20 UTC1h 15m
2026-07-23 CSS7277 - Jul 23, 19:05 UTCJul 23, 19:45 UTC40m
2026-07-17 YZR7912 - Jul 17, 23:00 UTCJul 17, 23:10 UTC10m
2026-07-17 YZR7912 - Jul 17, 21:44 UTCJul 17, 22:29 UTC45m
2026-07-17 YZR7911 - Jul 17, 17:50 UTCJul 17, 19:25 UTC1h 35m
2026-07-16 YZR7912 - Jul 16, 20:29 UTCJul 16, 21:40 UTC1h 10m
2026-07-16 YZR7911 - Jul 16, 17:45 UTCJul 16, 19:25 UTC1h 40m
2026-07-15 YZR7912 - Jul 15, 20:35 UTCJul 15, 21:55 UTC1h 20m
2026-07-15 YZR7911 - Jul 15, 17:55 UTCJul 15, 19:25 UTC1h 30m
2026-07-14 YZR7912 - Jul 14, 20:50 UTCJul 14, 22:10 UTC1h 20m
2026-07-14 YZR7911 - Jul 14, 17:50 UTCJul 14, 19:30 UTC1h 40m
2026-07-13 YZR7912 - Jul 13, 21:10 UTCJul 13, 22:05 UTC55m
2026-07-13 YZR7911 - Jul 13, 18:00 UTCJul 13, 19:35 UTC1h 35m
2026-07-13 YZR7912 - Jul 13, 08:25 UTCJul 13, 09:45 UTC1h 20m
2026-07-13 YZR7911 - Jul 13, 05:20 UTCJul 13, 06:45 UTC1h 25m
2026-07-09 YZR7912 - Jul 9, 20:15 UTCJul 9, 21:40 UTC1h 25m
2026-07-09 YZR7911 CAN → TPE Jul 9, 17:50 UTCJul 9, 19:20 UTC1h 30m
2026-07-08 YZR7912 - Jul 8, 20:25 UTCJul 8, 21:40 UTC1h 15m
2026-07-08 YZR7911 CAN → TPE Jul 8, 17:55 UTCJul 8, 19:20 UTC1h 25m
2026-07-07 YZR7912 - Jul 7, 20:35 UTCJul 7, 21:30 UTC55m
2026-07-07 YZR7911 CAN → TPE Jul 7, 18:05 UTCJul 7, 19:35 UTC1h 30m
2026-07-06 YZR7912 - Jul 6, 20:55 UTCJul 6, 21:50 UTC55m
2026-07-06 YZR7911 CAN → TPE Jul 6, 18:25 UTCJul 6, 19:50 UTC1h 25m
2026-07-03 YZR7912 - Jul 3, 21:15 UTCJul 3, 22:15 UTC1h 0m
2026-07-03 YZR7911 CAN → TPE Jul 3, 18:40 UTCJul 3, 20:10 UTC1h 30m
2026-07-02 YZR7912 - Jul 2, 20:35 UTCJul 2, 21:40 UTC1h 5m
2026-07-02 YZR7911 CAN → TPE Jul 2, 18:00 UTCJul 2, 19:25 UTC1h 25m
2026-07-01 YZR7912 - Jul 1, 21:20 UTCJul 1, 21:35 UTC15m
2026-07-01 YZR7912 - Jul 1, 20:25 UTCJul 1, 20:50 UTC25m
2026-07-01 YZR7911 CAN → TPE Jul 1, 18:00 UTCJul 1, 19:30 UTC1h 30m
2026-06-30 YZR7912 - Jun 30, 20:40 UTCJun 30, 22:00 UTC1h 20m
2026-06-30 YZR7911 CAN → TPE Jun 30, 17:55 UTCJun 30, 19:15 UTC1h 20m
2026-06-29 YZR7912 - Jun 29, 20:54 UTCJun 29, 22:15 UTC1h 20m
2026-06-29 YZR7911 CAN → TPE Jun 29, 18:14 UTCJun 29, 19:44 UTC1h 30m
2026-06-28 CSS6864 - Jun 28, 21:14 UTCJun 28, 21:24 UTC10m
2026-06-26 YZR7912 - Jun 26, 21:39 UTCJun 26, 23:04 UTC1h 25m
2026-06-26 YZR7911 CAN → TPE Jun 26, 19:04 UTCJun 26, 20:29 UTC1h 25m
2026-06-25 YZR7912 - Jun 25, 20:49 UTCJun 25, 22:10 UTC1h 20m
2026-06-25 YZR7911 CAN → TPE Jun 25, 17:54 UTCJun 25, 19:24 UTC1h 30m
2026-06-24 YZR7912 - Jun 24, 20:40 UTCJun 24, 22:00 UTC1h 20m
2026-06-24 YZR7911 CAN → TPE Jun 24, 17:59 UTCJun 24, 19:34 UTC1h 35m

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-20CX page for operator, model, and routing details .

Mode-S 78179B frequently asked

What is Mode-S code 78179B?
78179B is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-20CX.
Where is Mode-S 78179B registered?
Mode-S code 78179B is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78179B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78179B, octal 36013633, decimal 7,870,363.
What flights does 78179B operate?
Mode-S 78179B has broadcast 19 distinct callsigns, including YZR7912, YZR7911, CSS326, CSS7110, CSS7109.