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sensors Mode-S transponder

780C99

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1977 · BOEING 737-800

Hex
780C99
Octal
36006231
Decimal
7,867,545
Country
CN
Tail
B-1977
Type
B738
No current signal · last broadcast Jul 26, 12:15 UTC
Flights observed
160
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 12:15 UTC

Last known position

Most recent position reported by Mode-S 780C99.

Country allocation

The ICAO 24-bit address 780C99 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 20 distinct

Callsign Airline Flights Last seen
CCA823 Air China 18 2026-07-25
CCA824 Air China 14 2026-07-25
CCA903 Air China 9 2026-07-19
CCA904 Air China 4 2026-06-22
CCA869 - 3 2026-07-11
CCA1809 - 3 2026-07-03
CCA1283 - 3 2026-07-15
CCA870 Air China 2 2026-06-05
CCA4148 - 2 2026-07-16
CCA1955 - 2 2026-07-06
CCA1921 - 2 2026-07-10
CCA1613 Air China 2 2026-06-12
CCA1476 Air China 2 2026-07-25
CCA1453 - 2 2026-07-04
CCA1421 Air China 2 2026-07-22
CCA1404 - 2 2026-07-17
CCA1324 Air China 2 2026-07-26
CCA1323 Air China 2 2026-07-26
CCA130 Air China 2 2026-05-08
CCA1299 - 2 2026-06-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CCA1324 ZUH → PEK Jul 26, 12:05 UTCJul 26, 12:15 UTC10m
2026-07-26 CCA1323 PEK → ZUH Jul 26, 07:45 UTCJul 26, 07:55 UTC10m
2026-07-26 CCA1344 CSX → PEK Jul 26, 04:35 UTCJul 26, 04:45 UTC10m
2026-07-25 CCA1343 PEK → CSX Jul 25, 23:00 UTCJul 25, 23:20 UTC20m
2026-07-25 CCA824 CNX → PEK Jul 25, 16:10 UTCJul 25, 16:50 UTC40m
2026-07-25 CCA823 PEK → CNX Jul 25, 10:30 UTCJul 25, 14:25 UTC3h 55m
2026-07-25 CCA1476 KMG → PEK Jul 25, 00:05 UTCJul 25, 08:25 UTC8h 20m
2026-07-23 CCA1819 PEK → NKG Jul 23, 13:25 UTCJul 23, 13:35 UTC10m
2026-07-23 CCA1202 XIY → PEK Jul 23, 10:45 UTCJul 23, 11:10 UTC25m
2026-07-23 CCA1201 PEK → XIY Jul 23, 06:35 UTCJul 23, 06:50 UTC15m
2026-07-22 CCA1421 PEK → CTU Jul 22, 00:40 UTCJul 22, 01:00 UTC20m
2026-07-21 CCA9616 XNN → PEK Jul 21, 14:00 UTCJul 21, 14:20 UTC20m
2026-07-21 CCA9615 - Jul 21, 09:00 UTCJul 21, 09:25 UTC25m
2026-07-20 CCA9527 - Jul 20, 05:45 UTCJul 20, 06:05 UTC20m
2026-07-19 CCA903 PEK → SGN Jul 19, 14:10 UTCJul 20, 00:05 UTC9h 55m
2026-07-19 CCA1959 PEK → HAK Jul 19, 04:05 UTCJul 19, 04:20 UTC15m
2026-07-18 CCA9743 PEK → KHN Jul 18, 15:10 UTCJul 18, 15:20 UTC10m
2026-07-18 CCA1489 - Jul 18, 01:05 UTCJul 18, 01:25 UTC20m
2026-07-17 CCA1222 - Jul 17, 13:20 UTCJul 17, 13:45 UTC25m
2026-07-17 CCA1221 - Jul 17, 08:49 UTCJul 17, 09:15 UTC25m
2026-07-17 CCA1404 - Jul 17, 06:15 UTCJul 17, 06:40 UTC25m
2026-07-16 CCA1403 - Jul 16, 23:05 UTCJul 16, 23:29 UTC25m
2026-07-16 CCA4148 - Jul 16, 03:00 UTCJul 16, 03:20 UTC20m
2026-07-15 CCA1283 - Jul 15, 08:40 UTCJul 15, 08:50 UTC10m
2026-07-14 CCA1439 - Jul 14, 06:50 UTCJul 14, 07:20 UTC30m
2026-07-13 CCA9659 - Jul 13, 23:15 UTCJul 13, 23:40 UTC25m
2026-07-13 CCA1881 - Jul 13, 11:10 UTCJul 13, 11:20 UTC10m
2026-07-12 CCA903 - Jul 12, 12:40 UTCJul 13, 00:20 UTC11h 40m
2026-07-12 CCA1935 - Jul 12, 03:05 UTCJul 12, 03:30 UTC25m
2026-07-11 CCA869 - Jul 11, 05:31 UTCJul 11, 05:45 UTC15m
2026-07-10 CCA1609 - Jul 10, 23:35 UTCJul 10, 23:45 UTC10m
2026-07-10 CCA1922 - Jul 10, 16:45 UTCJul 10, 16:55 UTC10m
2026-07-10 CCA1921 - Jul 10, 09:30 UTCJul 10, 09:50 UTC20m
2026-07-10 CCA1282 - Jul 10, 06:30 UTCJul 10, 07:15 UTC45m
2026-07-10 CCA1281 - Jul 10, 02:20 UTCJul 10, 02:40 UTC20m
2026-07-09 CCA824 - Jul 9, 16:00 UTCJul 9, 16:15 UTC15m
2026-07-09 CCA823 - Jul 9, 10:20 UTCJul 9, 14:15 UTC3h 55m
2026-07-08 CCA1353 - Jul 8, 06:35 UTCJul 8, 12:25 UTC5h 50m
2026-07-07 CCA1605 - Jul 7, 23:25 UTCJul 7, 23:35 UTC10m
2026-07-07 CCA1283 - Jul 7, 14:20 UTCJul 7, 14:40 UTC20m
2026-07-06 CCA1807 - Jul 6, 11:00 UTCJul 6, 11:15 UTC15m
2026-07-06 CCA1955 - Jul 6, 02:20 UTCJul 6, 02:40 UTC20m
2026-07-05 CCA1260 - Jul 5, 15:15 UTCJul 5, 15:35 UTC20m
2026-07-05 CCA1259 - Jul 5, 07:05 UTCJul 5, 07:25 UTC20m
2026-07-04 CCA1453 - Jul 4, 23:45 UTCJul 5, 00:05 UTC20m
2026-07-03 CCA1437 - Jul 3, 23:30 UTCJul 3, 23:55 UTC25m
2026-07-03 CCA1448 KMG → PEK Jul 3, 17:10 UTCJul 3, 17:40 UTC30m
2026-07-03 CCA1447 - Jul 3, 10:15 UTCJul 3, 10:25 UTC10m
2026-07-03 CCA1809 - Jul 3, 01:50 UTCJul 3, 02:00 UTC10m
2026-07-02 CCA824 - Jul 2, 16:05 UTCJul 2, 16:50 UTC45m

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-1977 page for operator, model, and routing details .

Mode-S 780C99 frequently asked

What is Mode-S code 780C99?
780C99 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1977.
Where is Mode-S 780C99 registered?
Mode-S code 780C99 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 780C99 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 12:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 780C99, octal 36006231, decimal 7,867,545.
What flights does 780C99 operate?
Mode-S 780C99 has broadcast 20 distinct callsigns, including CCA823, CCA824, CCA903, CCA904, CCA869.