Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

7817DE

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-20DQ · BOEING 737 MAX 8

Hex
7817DE
Octal
36013736
Decimal
7,870,430
Country
CN
Tail
B-20DQ
Type
B38M
No current signal · last broadcast 2h ago
Flights observed
65
Distinct callsigns
20
Country
CN
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 7817DE.

Country allocation

The ICAO 24-bit address 7817DE 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
CCA713 Air China 4 2026-05-30
CCA1295 Air China 4 2026-06-02
CCA1453 - 3 2026-04-29
CCA1445 Air China 3 2026-05-28
CCA1251 Air China 3 2026-05-26
CCA108 Air China 3 2026-05-27
CCA107 Air China 3 2026-05-26
CCA714 Air China 2 2026-05-30
CCA1902 Air China 2 2026-05-20
CCA1446 Air China 2 2026-05-21
CCA1296 Air China 2 2026-06-03
CCA1258 - 2 2026-04-26
CCA1256 - 2 2026-04-28
CCA1255 - 2 2026-06-03
CCA960 Air China 1 2026-05-15
CCA959 Air China 1 2026-05-15
CCA1901 Air China 1 2026-05-01
CCA1609 Air China 1 2026-05-04
CCA1491 Air China 1 2026-04-23
CCA1455 - 1 2026-04-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-03 CCA1255 - Jun 3, 08:25 UTCJun 3, 08:35 UTC10m
2026-06-03 CCA1296 URC → PEK Jun 3, 06:10 UTCJun 3, 06:25 UTC15m
2026-06-02 CCA1295 PEK → URC Jun 2, 13:00 UTCJun 2, 13:15 UTC15m
2026-05-30 CCA714 SVO → URC May 30, 19:10 UTCMay 30, 23:00 UTC3h 50m
2026-05-30 CCA713 URC → SVO May 30, 12:40 UTCMay 30, 13:20 UTC40m
2026-05-28 CCA1295 PEK → URC May 28, 12:30 UTCMay 28, 12:50 UTC20m
2026-05-28 CCA1445 PEK → KMG May 28, 02:50 UTCMay 28, 10:30 UTC7h 40m
2026-05-27 CCA1292 URC → PEK May 27, 16:30 UTCMay 27, 16:50 UTC20m
2026-05-27 CCA1291 PEK → URC May 27, 07:55 UTCMay 27, 08:10 UTC15m
2026-05-27 CCA108 HKG → PEK May 27, 02:44 UTCMay 27, 03:09 UTC25m
2026-05-26 CCA107 PEK → HKG May 26, 10:34 UTCMay 26, 13:34 UTC3h 0m
2026-05-26 CCA1252 URC → PEK May 26, 08:19 UTCMay 26, 08:39 UTC20m
2026-05-26 CCA1251 PEK → URC May 26, 00:00 UTCMay 26, 00:14 UTC15m
2026-05-23 CCA108 HKG → PEK May 23, 03:10 UTCMay 23, 03:25 UTC15m
2026-05-22 CCA107 PEK → HKG May 22, 13:00 UTCMay 22, 13:35 UTC35m
2026-05-22 CCA1251 PEK → URC May 22, 00:00 UTCMay 22, 00:10 UTC10m
2026-05-21 CCA1446 KMG → PEK May 21, 10:10 UTCMay 21, 10:35 UTC25m
2026-05-21 CCA1445 PEK → KMG May 21, 02:50 UTCMay 21, 03:10 UTC20m
2026-05-20 CCA1902 URC → PEK May 20, 10:05 UTCMay 20, 10:20 UTC15m
2026-05-15 CCA960 BKK → PEK May 15, 13:25 UTCMay 15, 14:25 UTC1h 0m
2026-05-15 CCA959 PEK → BKK May 15, 10:55 UTCMay 15, 11:55 UTC1h 0m
2026-05-07 CCA1295 PEK → URC May 7, 12:30 UTCMay 7, 12:50 UTC20m
2026-05-07 CCA1446 KMG → PEK May 7, 10:20 UTCMay 7, 10:35 UTC15m
2026-05-07 CCA1445 PEK → KMG May 7, 02:45 UTCMay 7, 03:15 UTC30m
2026-05-06 CCA1294 URC → PEK May 6, 16:05 UTCMay 6, 16:20 UTC15m
2026-05-06 CCA1293 PEK → URC May 6, 07:45 UTCMay 6, 08:05 UTC20m
2026-05-05 CCA1246 HTN → PEK May 5, 16:10 UTCMay 5, 16:25 UTC15m
2026-05-05 CCA1245 PEK → HTN May 5, 05:25 UTCMay 5, 05:35 UTC10m
2026-05-04 CCA1609 PEK → CGQ May 4, 23:30 UTCMay 4, 23:40 UTC10m
2026-05-04 CCA1363 PEK → CSX May 4, 07:45 UTCMay 4, 07:55 UTC10m
2026-05-04 CCA1226 XIY → PEK May 4, 05:10 UTCMay 4, 05:30 UTC20m
2026-05-04 CCA1225 PEK → XIY May 4, 00:00 UTCMay 4, 00:25 UTC25m
2026-05-03 CCA1401 PEK → CTU May 3, 08:10 UTCMay 3, 08:25 UTC15m
2026-05-03 CCA1296 URC → PEK May 3, 05:55 UTCMay 3, 06:15 UTC20m
2026-05-02 CCA713 URC → SVO May 2, 12:45 UTCMay 2, 20:45 UTC8h 0m
2026-05-01 CCA1295 PEK → URC May 1, 12:45 UTCMay 1, 13:00 UTC15m
2026-05-01 CCA1902 URC → PEK May 1, 10:05 UTCMay 1, 10:20 UTC15m
2026-05-01 CCA1901 PEK → URC May 1, 01:30 UTCMay 1, 02:00 UTC30m
2026-04-30 CCA1260 - Apr 30, 15:45 UTCApr 30, 16:10 UTC25m
2026-04-30 CCA1259 - Apr 30, 07:25 UTCApr 30, 07:45 UTC20m
2026-04-30 CCA1454 - Apr 30, 05:15 UTCApr 30, 05:25 UTC10m
2026-04-29 CCA1453 - Apr 29, 23:55 UTCApr 30, 00:15 UTC20m
2026-04-29 CCA1409 PEK → CKG Apr 29, 08:25 UTCApr 29, 08:40 UTC15m
2026-04-28 CCA1453 - Apr 28, 23:40 UTCApr 29, 00:05 UTC25m
2026-04-28 CCA1256 - Apr 28, 16:55 UTCApr 28, 17:10 UTC15m
2026-04-27 CCA1437 PEK → CKG Apr 27, 23:05 UTCApr 27, 23:25 UTC20m
2026-04-26 CCA1251 PEK → URC Apr 26, 23:55 UTCApr 27, 00:05 UTC10m
2026-04-26 CCA1258 - Apr 26, 08:10 UTCApr 26, 08:25 UTC15m
2026-04-25 CCA1257 - Apr 25, 23:45 UTCApr 25, 23:55 UTC10m
2026-04-24 CCA1243 PEK → URC Apr 24, 23:00 UTCApr 24, 23:20 UTC20m

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

Mode-S 7817DE frequently asked

What is Mode-S code 7817DE?
7817DE is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-20DQ.
Where is Mode-S 7817DE registered?
Mode-S code 7817DE is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7817DE broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7817DE, octal 36013736, decimal 7,870,430.
What flights does 7817DE operate?
Mode-S 7817DE has broadcast 20 distinct callsigns, including CCA713, CCA1295, CCA1453, CCA1445, CCA1251.