Apparatus

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sensors Mode-S transponder

7800CF

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-6997 · BOEING 737-800

Hex
7800CF
Octal
36000317
Decimal
7,864,527
Country
CN
Tail
B-6997
Type
B738
No current signal · last broadcast Jul 25, 01:45 UTC
Flights observed
66
Distinct callsigns
12
Country
CN
Last broadcast
Jul 25, 01:45 UTC

Last known position

Most recent position reported by Mode-S 7800CF.

Country allocation

The ICAO 24-bit address 7800CF 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 12 distinct

Callsign Airline Flights Last seen
OKA2764 - 15 2026-07-20
OKA2763 - 12 2026-07-20
OKA3100 - 11 2026-07-21
OKA3063 - 9 2026-07-10
OKA3064 - 7 2026-07-10
OKA3022 - 5 2026-07-16
OKA3021 - 2 2026-07-16
OKA3112 - 1 2026-04-27
OKA2930 Okay Airways 1 2026-04-18
OKA2929 Okay Airways 1 2026-04-18
OKA2898 Okay Airways 1 2026-07-24
OKA2897 Okay Airways 1 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 OKA2897 TSN → KMG Jul 25, 01:10 UTCJul 25, 01:45 UTC35m
2026-07-24 OKA2898 KMG → TSN Jul 24, 14:40 UTCJul 24, 15:10 UTC30m
2026-07-21 OKA3100 - Jul 21, 15:20 UTCJul 21, 15:40 UTC20m
2026-07-20 OKA2764 - Jul 20, 05:15 UTCJul 20, 05:25 UTC10m
2026-07-20 OKA2763 - Jul 20, 03:40 UTCJul 20, 03:55 UTC15m
2026-07-19 OKA2763 - Jul 19, 03:05 UTCJul 19, 03:20 UTC15m
2026-07-18 OKA2763 - Jul 18, 03:40 UTCJul 18, 03:50 UTC10m
2026-07-17 OKA2763 - Jul 17, 03:10 UTCJul 17, 03:20 UTC10m
2026-07-16 OKA3022 - Jul 16, 08:05 UTCJul 16, 08:20 UTC15m
2026-07-16 OKA3021 - Jul 16, 06:10 UTCJul 16, 06:25 UTC15m
2026-07-14 OKA3100 - Jul 14, 14:55 UTCJul 14, 15:15 UTC20m
2026-07-13 OKA2764 - Jul 13, 05:01 UTCJul 13, 05:10 UTC10m
2026-07-13 OKA2763 - Jul 13, 02:55 UTCJul 13, 03:15 UTC20m
2026-07-10 OKA3064 - Jul 10, 09:05 UTCJul 10, 09:15 UTC10m
2026-07-10 OKA3063 - Jul 10, 07:25 UTCJul 10, 07:40 UTC15m
2026-07-08 OKA3100 - Jul 8, 15:45 UTCJul 8, 16:10 UTC25m
2026-07-07 OKA2764 - Jul 7, 10:05 UTCJul 7, 10:15 UTC10m
2026-07-07 OKA2763 - Jul 7, 06:55 UTCJul 7, 07:05 UTC10m
2026-07-06 OKA3064 - Jul 6, 08:40 UTCJul 6, 08:50 UTC10m
2026-07-06 OKA3063 - Jul 6, 06:50 UTCJul 6, 07:00 UTC10m
2026-07-04 OKA3100 - Jul 4, 14:50 UTCJul 4, 15:20 UTC30m
2026-07-02 OKA2764 - Jul 2, 06:30 UTCJul 2, 06:41 UTC11m
2026-07-01 OKA3064 - Jul 1, 08:00 UTCJul 1, 08:15 UTC15m
2026-07-01 OKA3063 - Jul 1, 05:25 UTCJul 1, 05:40 UTC15m
2026-06-29 OKA3100 - Jun 29, 14:39 UTCJun 29, 15:09 UTC30m
2026-06-28 OKA3100 - Jun 28, 15:09 UTCJun 28, 15:34 UTC25m
2026-06-27 OKA2764 - Jun 27, 05:39 UTCJun 27, 05:49 UTC10m
2026-06-21 OKA3063 - Jun 21, 05:00 UTCJun 21, 05:10 UTC10m
2026-06-19 OKA2764 - Jun 19, 07:45 UTCJun 19, 07:54 UTC10m
2026-06-19 OKA2763 - Jun 19, 06:10 UTCJun 19, 06:29 UTC20m
2026-06-18 OKA3022 - Jun 18, 12:50 UTCJun 18, 13:00 UTC10m
2026-06-15 OKA2764 - Jun 15, 07:40 UTCJun 15, 07:55 UTC15m
2026-06-06 OKA3100 - Jun 6, 14:50 UTCJun 6, 15:15 UTC25m
2026-06-05 OKA3100 - Jun 5, 14:50 UTCJun 5, 15:15 UTC25m
2026-06-04 OKA2764 - Jun 4, 06:00 UTCJun 4, 06:10 UTC10m
2026-06-04 OKA2763 - Jun 4, 04:40 UTCJun 4, 04:55 UTC15m
2026-06-03 OKA2764 - Jun 3, 05:25 UTCJun 3, 05:35 UTC10m
2026-06-02 OKA2764 - Jun 2, 05:05 UTCJun 2, 05:15 UTC10m
2026-06-01 OKA3064 SZX → EHU Jun 1, 07:55 UTCJun 1, 08:05 UTC10m
2026-05-26 OKA3022 XAI → TSN May 26, 07:59 UTCMay 26, 08:10 UTC10m
2026-05-26 OKA3021 TSN → XAI May 26, 05:15 UTCMay 26, 05:25 UTC10m
2026-05-23 OKA3022 XAI → TSN May 23, 08:10 UTCMay 23, 08:25 UTC15m
2026-05-20 OKA2764 - May 20, 06:20 UTCMay 20, 06:30 UTC10m
2026-05-19 OKA2763 - May 19, 04:55 UTCMay 19, 05:10 UTC15m
2026-05-18 OKA2764 - May 18, 04:45 UTCMay 18, 04:55 UTC10m
2026-05-17 OKA2764 - May 17, 04:55 UTCMay 17, 05:05 UTC10m
2026-05-17 OKA2763 - May 17, 03:15 UTCMay 17, 03:30 UTC15m
2026-05-14 OKA2764 - May 14, 05:55 UTCMay 14, 06:05 UTC10m
2026-05-14 OKA2763 - May 14, 04:10 UTCMay 14, 04:25 UTC15m
2026-05-13 OKA2764 - May 13, 04:55 UTCMay 13, 05:05 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-6997 page for operator, model, and routing details .

Mode-S 7800CF frequently asked

What is Mode-S code 7800CF?
7800CF is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-6997.
Where is Mode-S 7800CF registered?
Mode-S code 7800CF is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7800CF broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 01:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7800CF, octal 36000317, decimal 7,864,527.
What flights does 7800CF operate?
Mode-S 7800CF has broadcast 12 distinct callsigns, including OKA2764, OKA2763, OKA3100, OKA3063, OKA3064.