Apparatus

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sensors Mode-S transponder

781FEB

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-223Y · BOEING 737 MAX 8

Hex
781FEB
Octal
36017753
Decimal
7,872,491
Country
CN
Tail
B-223Y
Type
B38M
Broadcasting now · callsign CCA1291 · 18,275 ft
Flights observed
76
Distinct callsigns
20
Country
CN
Last broadcast
5h ago

Current position

781FEB is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 781FEB 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
CCA107 Air China 8 2026-06-02
CCA108 Air China 6 2026-06-03
CCA1216 Air China 5 2026-05-21
CCA1215 Air China 4 2026-05-20
CCA1349 Air China 3 2026-05-21
CCA1296 Air China 3 2026-05-30
CCA956 Air China 2 2026-05-08
CCA713 Air China 2 2026-04-21
CCA1453 - 2 2026-04-19
CCA1439 Air China 2 2026-05-05
CCA1295 Air China 2 2026-05-17
CCA1252 Air China 2 2026-05-09
CCA1251 Air China 2 2026-05-08
CCA980 Air China 1 2026-04-26
CCA979 Air China 1 2026-04-26
CCA960 Air China 1 2026-05-16
CCA959 Air China 1 2026-05-16
CCA955 Air China 1 2026-05-08
CCA714 Air China 1 2026-04-22
CCA1974 Air China 1 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-03 CCA108 HKG → PEK Jun 3, 02:35 UTCJun 3, 02:50 UTC15m
2026-06-02 CCA107 PEK → HKG Jun 2, 13:15 UTCJun 2, 13:45 UTC30m
2026-06-02 CCA107 PEK → HKG Jun 2, 10:35 UTCJun 2, 11:05 UTC30m
2026-06-01 CCA108 HKG → PEK Jun 1, 02:45 UTCJun 1, 03:00 UTC15m
2026-05-30 CCA107 PEK → HKG May 30, 23:50 UTCMay 31, 13:30 UTC13h 40m
2026-05-30 CCA1292 URC → PEK May 30, 16:10 UTCMay 30, 16:25 UTC15m
2026-05-30 CCA1291 PEK → URC May 30, 08:05 UTCMay 30, 08:20 UTC15m
2026-05-30 CCA1296 URC → PEK May 30, 05:05 UTCMay 30, 05:20 UTC15m
2026-05-29 CCA1973 PEK → URC May 29, 13:15 UTCMay 29, 13:30 UTC15m
2026-05-29 CCA1974 URC → PEK May 29, 10:25 UTCMay 29, 10:45 UTC20m
2026-05-21 CCA1349 PEK → CSX May 21, 12:35 UTCMay 21, 12:50 UTC15m
2026-05-21 CCA1216 KHG → PEK May 21, 09:45 UTCMay 21, 10:00 UTC15m
2026-05-20 CCA1215 PEK → KHG May 20, 22:50 UTCMay 20, 23:00 UTC10m
2026-05-20 CCA1256 - May 20, 17:15 UTCMay 20, 17:35 UTC20m
2026-05-20 CCA1255 - May 20, 08:00 UTCMay 20, 08:15 UTC15m
2026-05-20 CCA1296 URC → PEK May 20, 05:30 UTCMay 20, 05:50 UTC20m
2026-05-17 CCA1295 PEK → URC May 17, 12:25 UTCMay 17, 12:35 UTC10m
2026-05-17 CCA1216 KHG → PEK May 17, 09:40 UTCMay 17, 10:00 UTC20m
2026-05-16 CCA960 BKK → PEK May 16, 12:55 UTCMay 16, 13:21 UTC25m
2026-05-16 CCA959 PEK → BKK May 16, 01:00 UTCMay 16, 10:50 UTC9h 51m
2026-05-15 CCA117 PEK → HKG May 15, 12:20 UTCMay 15, 12:50 UTC30m
2026-05-10 CCA1389 PEK → CSX May 10, 00:45 UTCMay 10, 01:04 UTC20m
2026-05-09 CCA1635 PEK → SHE May 9, 10:55 UTCMay 9, 11:05 UTC10m
2026-05-09 CCA1252 URC → PEK May 9, 08:15 UTCMay 9, 08:30 UTC15m
2026-05-08 CCA1251 PEK → URC May 8, 23:50 UTCMay 9, 00:05 UTC15m
2026-05-08 CCA956 UBN → PEK May 8, 09:54 UTCMay 8, 10:04 UTC10m
2026-05-08 CCA955 PEK → UBN May 8, 05:20 UTCMay 8, 05:35 UTC15m
2026-05-07 CCA1349 PEK → CSX May 7, 12:10 UTCMay 7, 12:25 UTC15m
2026-05-07 CCA1216 KHG → PEK May 7, 09:45 UTCMay 7, 10:05 UTC20m
2026-05-06 CCA1215 PEK → KHG May 6, 22:50 UTCMay 6, 23:05 UTC15m
2026-05-06 CCA1242 AAT → PEK May 6, 15:40 UTCMay 6, 15:55 UTC15m
2026-05-06 CCA1704 PEK → HGH May 6, 00:20 UTCMay 6, 00:31 UTC10m
2026-05-05 CCA1440 CKG → PEK May 5, 12:30 UTCMay 5, 12:40 UTC10m
2026-05-05 CCA1439 PEK → CKG May 5, 06:30 UTCMay 5, 06:40 UTC10m
2026-05-04 CCA1230 XIY → PEK May 4, 13:10 UTCMay 4, 13:25 UTC15m
2026-05-04 CCA1229 PEK → XIY May 4, 08:40 UTCMay 4, 09:05 UTC25m
2026-05-04 CCA108 HKG → PEK May 4, 05:35 UTCMay 4, 05:50 UTC15m
2026-05-04 CCA108 HKG → PEK May 4, 02:54 UTCMay 4, 03:09 UTC15m
2026-05-03 CCA107 PEK → HKG May 3, 10:35 UTCMay 3, 13:55 UTC3h 20m
2026-05-03 CCA1476 KMG → PEK May 3, 07:50 UTCMay 3, 08:10 UTC20m
2026-05-02 CCA1475 PEK → KMG May 2, 23:50 UTCMay 3, 00:15 UTC25m
2026-05-02 CCA1216 KHG → PEK May 2, 09:55 UTCMay 2, 10:10 UTC15m
2026-05-01 CCA1215 PEK → KHG May 1, 22:55 UTCMay 1, 23:10 UTC15m
2026-05-01 CCA1246 HTN → PEK May 1, 15:55 UTCMay 1, 16:15 UTC20m
2026-05-01 CCA1245 PEK → HTN May 1, 05:20 UTCMay 1, 05:40 UTC20m
2026-04-30 CCA1349 PEK → CSX Apr 30, 12:55 UTCApr 30, 13:10 UTC15m
2026-04-30 CCA1216 KHG → PEK Apr 30, 09:35 UTCApr 30, 09:55 UTC20m
2026-04-29 CCA1215 PEK → KHG Apr 29, 22:50 UTCApr 29, 23:10 UTC19m
2026-04-29 CCA1439 PEK → CKG Apr 29, 06:19 UTCApr 29, 06:39 UTC20m
2026-04-28 CCA1222 LHW → PEK Apr 28, 13:30 UTCApr 28, 13:40 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-223Y page for operator, model, and routing details .

Mode-S 781FEB frequently asked

What is Mode-S code 781FEB?
781FEB is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-223Y.
Where is Mode-S 781FEB registered?
Mode-S code 781FEB is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781FEB broadcasting right now?
Yes. Mode-S 781FEB is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781FEB, octal 36017753, decimal 7,872,491.
What flights does 781FEB operate?
Mode-S 781FEB has broadcast 20 distinct callsigns, including CCA107, CCA108, CCA1216, CCA1215, CCA1349.