Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C746

ICAO 24-bit transponder address · allocated to Korea, South

Currently assigned to HL8746 · AIRBUS A-350-900

Hex
71C746
Octal
34343506
Decimal
7,456,582
Country
KR
Tail
HL8746
Type
A359
No current signal · last broadcast 7h ago
Flights observed
121
Distinct callsigns
10
Country
KR
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 71C746.

Country allocation

The ICAO 24-bit address 71C746 falls within the block assigned to Korea, South (KR) by ICAO Annex 10, Volume III. Every aircraft registered in Korea, South 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 10 distinct

Callsign Airline Flights Last seen
KAL078 Korean Air 27 2026-05-25
KAL077 Korean Air 24 2026-05-25
KAL2011 Korean Air 18 2026-05-05
KAL2012 Korean Air 12 2026-05-05
KAL932 Korean Air 11 2026-05-28
KAL931 Korean Air 10 2026-05-27
KAL752 Korean Air 8 2026-05-29
KAL751 Korean Air 8 2026-05-29
KAL2027 Korean Air 2 2026-05-22
KAL2028 Korean Air 1 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 KAL752 NGO → ICN May 29, 17:20 UTCMay 29, 19:20 UTC2h 0m
2026-05-29 KAL751 ICN → NGO May 29, 11:55 UTCMay 29, 13:25 UTC1h 30m
2026-05-28 KAL932 FCO → ICN May 28, 05:55 UTCMay 28, 06:20 UTC25m
2026-05-27 KAL932 FCO → ICN May 27, 19:50 UTCMay 28, 05:10 UTC9h 20m
2026-05-27 KAL931 ICN → FCO May 27, 06:20 UTCMay 27, 17:40 UTC11h 21m
2026-05-27 KAL931 ICN → FCO May 27, 04:59 UTCMay 27, 05:19 UTC20m
2026-05-26 KAL752 NGO → ICN May 26, 17:25 UTCMay 26, 19:20 UTC1h 55m
2026-05-26 KAL751 ICN → NGO May 26, 11:54 UTCMay 26, 13:34 UTC1h 40m
2026-05-25 KAL078 YYZ → ICN May 25, 16:55 UTCMay 26, 06:34 UTC13h 40m
2026-05-25 KAL077 ICN → YYZ May 25, 02:10 UTCMay 25, 14:10 UTC12h 0m
2026-05-24 KAL932 FCO → ICN May 24, 06:15 UTCMay 24, 06:40 UTC25m
2026-05-23 KAL932 FCO → ICN May 23, 19:45 UTCMay 23, 23:25 UTC3h 40m
2026-05-23 KAL931 ICN → FCO May 23, 10:45 UTCMay 23, 17:25 UTC6h 40m
2026-05-23 KAL931 ICN → FCO May 23, 05:05 UTCMay 23, 05:30 UTC25m
2026-05-22 KAL2028 TPE → ICN May 22, 11:15 UTCMay 22, 13:20 UTC2h 5m
2026-05-22 KAL2027 ICN → TPE May 22, 09:10 UTCMay 22, 09:35 UTC25m
2026-05-22 KAL2027 ICN → TPE May 22, 07:30 UTCMay 22, 07:50 UTC20m
2026-05-21 KAL752 NGO → ICN May 21, 17:25 UTCMay 21, 19:15 UTC1h 50m
2026-05-21 KAL751 ICN → NGO May 21, 11:50 UTCMay 21, 13:35 UTC1h 45m
2026-05-21 KAL932 FCO → ICN May 21, 06:10 UTCMay 21, 06:30 UTC20m
2026-05-20 KAL932 FCO → ICN May 20, 19:50 UTCMay 21, 05:20 UTC9h 30m
2026-05-20 KAL931 ICN → FCO May 20, 04:50 UTCMay 20, 17:10 UTC12h 20m
2026-05-19 KAL752 NGO → ICN May 19, 17:15 UTCMay 19, 19:10 UTC1h 55m
2026-05-19 KAL751 ICN → NGO May 19, 11:50 UTCMay 19, 13:45 UTC1h 55m
2026-05-18 KAL078 YYZ → ICN May 18, 16:50 UTCMay 19, 07:30 UTC14h 39m
2026-05-18 KAL077 ICN → YYZ May 18, 01:00 UTCMay 18, 13:55 UTC12h 55m
2026-05-17 KAL932 FCO → ICN May 17, 06:05 UTCMay 17, 06:25 UTC20m
2026-05-16 KAL932 FCO → ICN May 16, 19:55 UTCMay 16, 23:35 UTC3h 40m
2026-05-16 KAL931 ICN → FCO May 16, 10:05 UTCMay 16, 17:05 UTC7h 0m
2026-05-16 KAL931 ICN → FCO May 16, 04:45 UTCMay 16, 05:00 UTC15m
2026-05-15 KAL752 NGO → ICN May 15, 17:15 UTCMay 15, 19:00 UTC1h 45m
2026-05-15 KAL751 ICN → NGO May 15, 11:45 UTCMay 15, 13:40 UTC1h 55m
2026-05-14 KAL078 YYZ → ICN May 14, 17:15 UTCMay 15, 06:20 UTC13h 5m
2026-05-14 KAL077 ICN → YYZ May 14, 01:00 UTCMay 14, 13:50 UTC12h 50m
2026-05-13 KAL752 NGO → ICN May 13, 17:15 UTCMay 13, 19:05 UTC1h 50m
2026-05-13 KAL751 ICN → NGO May 13, 11:45 UTCMay 13, 13:35 UTC1h 50m
2026-05-12 KAL078 YYZ → ICN May 12, 16:45 UTCMay 13, 06:35 UTC13h 50m
2026-05-12 KAL077 ICN → YYZ May 12, 02:50 UTCMay 12, 13:40 UTC10h 50m
2026-05-11 KAL752 NGO → ICN May 11, 17:20 UTCMay 11, 19:15 UTC1h 55m
2026-05-11 KAL751 ICN → NGO May 11, 11:45 UTCMay 11, 13:35 UTC1h 50m
2026-05-10 KAL078 YYZ → ICN May 10, 16:44 UTCMay 11, 06:25 UTC13h 40m
2026-05-10 KAL077 ICN → YYZ May 10, 00:55 UTCMay 10, 13:05 UTC12h 10m
2026-05-09 KAL752 NGO → ICN May 9, 17:25 UTCMay 9, 19:25 UTC2h 0m
2026-05-09 KAL751 ICN → NGO May 9, 11:50 UTCMay 9, 13:30 UTC1h 40m
2026-05-08 KAL078 YYZ → ICN May 8, 16:45 UTCMay 9, 07:05 UTC14h 20m
2026-05-08 KAL077 ICN → YYZ May 8, 01:14 UTCMay 8, 13:30 UTC12h 15m
2026-05-06 KAL078 YYZ → ICN May 6, 16:45 UTCMay 7, 06:45 UTC13h 59m
2026-05-06 KAL077 ICN → YYZ May 6, 01:05 UTCMay 6, 13:20 UTC12h 15m
2026-05-05 KAL2012 HKG → ICN May 5, 17:00 UTCMay 5, 19:50 UTC2h 50m
2026-05-05 KAL2011 ICN → HKG May 5, 11:10 UTCMay 5, 14:25 UTC3h 15m

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 HL8746 page for operator, model, and routing details .

Mode-S 71C746 frequently asked

What is Mode-S code 71C746?
71C746 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8746.
Where is Mode-S 71C746 registered?
Mode-S code 71C746 is allocated to Korea, South (KR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 71C746 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C746, octal 34343506, decimal 7,456,582.
What flights does 71C746 operate?
Mode-S 71C746 has broadcast 10 distinct callsigns, including KAL078, KAL077, KAL2011, KAL2012, KAL932.