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 Jul 26, 17:55 UTC
Flights observed
228
Distinct callsigns
10
Country
KR
Last broadcast
Jul 26, 17:55 UTC

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 46 2026-07-26
KAL077 Korean Air 44 2026-07-26
KAL752 Korean Air 28 2026-07-25
KAL751 Korean Air 28 2026-07-25
KAL932 Korean Air 26 2026-07-21
KAL931 Korean Air 23 2026-07-20
KAL2011 Korean Air 18 2026-05-05
KAL2012 Korean Air 12 2026-05-05
KAL2027 Korean Air 2 2026-05-22
KAL2028 Korean Air 1 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL078 YYZ → ICN Jul 26, 17:20 UTCJul 26, 17:55 UTC35m
2026-07-26 KAL077 ICN → YYZ Jul 26, 01:10 UTCJul 26, 13:45 UTC12h 36m
2026-07-25 KAL752 NGO → ICN Jul 25, 17:20 UTCJul 25, 19:10 UTC1h 50m
2026-07-25 KAL751 ICN → NGO Jul 25, 12:00 UTCJul 25, 13:50 UTC1h 50m
2026-07-24 KAL078 YYZ → ICN Jul 24, 17:15 UTCJul 25, 07:40 UTC14h 25m
2026-07-24 KAL077 ICN → YYZ Jul 24, 01:15 UTCJul 24, 13:35 UTC12h 20m
2026-07-22 KAL078 YYZ → ICN Jul 22, 17:05 UTCJul 23, 07:25 UTC14h 20m
2026-07-22 KAL077 ICN → YYZ Jul 22, 01:05 UTCJul 22, 13:20 UTC12h 15m
2026-07-21 KAL752 HND → ICN Jul 21, 17:15 UTCJul 21, 19:05 UTC1h 50m
2026-07-21 KAL751 ICN → HND Jul 21, 12:00 UTCJul 21, 13:45 UTC1h 45m
2026-07-21 KAL932 FCO → ICN Jul 21, 06:00 UTCJul 21, 06:25 UTC25m
2026-07-20 KAL932 FCO → ICN Jul 20, 20:00 UTCJul 21, 05:05 UTC9h 5m
2026-07-20 KAL931 ICN → FCO Jul 20, 05:00 UTCJul 20, 17:35 UTC12h 35m
2026-07-19 KAL752 HND → ICN Jul 19, 17:20 UTCJul 19, 19:00 UTC1h 40m
2026-07-19 KAL751 ICN → HND Jul 19, 11:50 UTCJul 19, 13:45 UTC1h 55m
2026-07-18 KAL078 YYZ → ICN Jul 18, 17:20 UTCJul 19, 07:15 UTC13h 55m
2026-07-18 KAL077 ICN → YYZ Jul 18, 09:25 UTCJul 18, 13:50 UTC4h 25m
2026-07-18 KAL077 ICN → YYZ Jul 18, 01:10 UTCJul 18, 09:20 UTC8h 11m
2026-07-17 KAL752 HND → ICN Jul 17, 17:15 UTCJul 17, 19:09 UTC1h 55m
2026-07-17 KAL751 ICN → HND Jul 17, 11:50 UTCJul 17, 13:40 UTC1h 50m
2026-07-13 KAL752 HND → ICN Jul 13, 17:40 UTCJul 13, 19:30 UTC1h 50m
2026-07-13 KAL751 - Jul 13, 11:45 UTCJul 13, 13:30 UTC1h 45m
2026-07-12 KAL078 - Jul 12, 17:25 UTCJul 13, 06:55 UTC13h 30m
2026-07-12 KAL077 ICN → YYZ Jul 12, 00:55 UTCJul 12, 13:40 UTC12h 45m
2026-07-11 KAL752 HND → ICN Jul 11, 17:20 UTCJul 11, 19:05 UTC1h 45m
2026-07-11 KAL751 ICN → HND Jul 11, 12:05 UTCJul 11, 13:55 UTC1h 50m
2026-07-10 KAL078 - Jul 10, 17:20 UTCJul 11, 06:40 UTC13h 21m
2026-07-10 KAL077 ICN → YYZ Jul 10, 01:05 UTCJul 10, 13:50 UTC12h 45m
2026-07-09 KAL752 HND → ICN Jul 9, 17:10 UTCJul 9, 19:05 UTC1h 55m
2026-07-09 KAL751 ICN → HND Jul 9, 12:00 UTCJul 9, 13:55 UTC1h 55m
2026-07-09 KAL932 - Jul 9, 05:45 UTCJul 9, 06:05 UTC20m
2026-07-08 KAL932 - Jul 8, 19:50 UTCJul 9, 04:55 UTC9h 5m
2026-07-08 KAL931 - Jul 8, 06:15 UTCJul 8, 17:40 UTC11h 25m
2026-07-08 KAL931 - Jul 8, 04:55 UTCJul 8, 05:15 UTC20m
2026-07-07 KAL752 HND → ICN Jul 7, 17:15 UTCJul 7, 19:20 UTC2h 5m
2026-07-07 KAL751 ICN → HND Jul 7, 11:50 UTCJul 7, 13:35 UTC1h 45m
2026-07-06 KAL078 YYZ → ICN Jul 6, 17:20 UTCJul 7, 06:35 UTC13h 15m
2026-07-06 KAL077 ICN → YYZ Jul 6, 01:25 UTCJul 6, 14:00 UTC12h 35m
2026-07-04 KAL752 HND → ICN Jul 4, 17:20 UTCJul 4, 19:15 UTC1h 55m
2026-07-04 KAL751 ICN → HND Jul 4, 11:45 UTCJul 4, 13:30 UTC1h 45m
2026-07-03 KAL078 YYZ → ICN Jul 3, 17:15 UTCJul 4, 06:45 UTC13h 30m
2026-07-03 KAL077 ICN → YYZ Jul 3, 01:10 UTCJul 3, 13:35 UTC12h 25m
2026-07-01 KAL078 YYZ → ICN Jul 1, 17:15 UTCJul 2, 07:05 UTC13h 50m
2026-07-01 KAL077 ICN → YYZ Jul 1, 00:55 UTCJul 1, 13:25 UTC12h 30m
2026-06-30 KAL932 - Jun 30, 06:05 UTCJun 30, 06:35 UTC30m
2026-06-29 KAL932 - Jun 29, 19:54 UTCJun 30, 05:15 UTC9h 21m
2026-06-29 KAL931 ICN → FCO Jun 29, 05:04 UTCJun 29, 17:30 UTC12h 25m
2026-06-28 KAL932 - Jun 28, 06:05 UTCJun 28, 06:30 UTC25m
2026-06-27 KAL932 - Jun 27, 20:04 UTCJun 28, 05:20 UTC9h 15m
2026-06-27 KAL931 - Jun 27, 05:59 UTCJun 27, 17:20 UTC11h 20m

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 Jul 26, 17:55 UTC.
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, KAL752, KAL751, KAL932.