Apparatus

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sensors Mode-S transponder

71C597

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

Currently assigned to HL8597 · AIRBUS A-350-900

Hex
71C597
Octal
34342627
Decimal
7,456,151
Country
KR
Tail
HL8597
Type
A359
Broadcasting now · callsign KAL077 · 37,000 ft
Flights observed
183
Distinct callsigns
10
Country
KR
Last broadcast
4h ago

Current position

71C597 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C597 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
KAL077 - 45 2026-07-14
KAL078 - 40 2026-07-08
KAL932 - 24 2026-07-07
KAL931 - 18 2026-07-06
KAL752 - 17 2026-07-01
KAL751 - 17 2026-07-01
KAL2011 Korean Air 12 2026-05-06
KAL2012 Korean Air 8 2026-05-06
KE752 Korean Air 1 2026-05-24
KE751 Korean Air 1 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KAL077 - Jul 14, 01:20 UTCJul 14, 02:55 UTC1h 35m
2026-07-08 KAL078 YYZ → ICN Jul 8, 17:20 UTCJul 9, 06:55 UTC13h 35m
2026-07-08 KAL077 ICN → YYZ Jul 8, 01:10 UTCJul 8, 13:50 UTC12h 40m
2026-07-07 KAL932 - Jul 7, 06:45 UTCJul 7, 07:05 UTC20m
2026-07-06 KAL932 - Jul 6, 20:20 UTCJul 7, 05:50 UTC9h 30m
2026-07-06 KAL931 - Jul 6, 05:25 UTCJul 6, 17:45 UTC12h 20m
2026-07-05 KAL932 - Jul 5, 05:55 UTCJul 5, 06:20 UTC25m
2026-07-04 KAL932 - Jul 4, 19:55 UTCJul 5, 05:10 UTC9h 15m
2026-07-04 KAL931 - Jul 4, 06:00 UTCJul 4, 17:10 UTC11h 10m
2026-07-04 KAL931 - Jul 4, 04:55 UTCJul 4, 05:10 UTC15m
2026-07-02 KAL078 YYZ → ICN Jul 2, 17:10 UTCJul 3, 06:40 UTC13h 30m
2026-07-02 KAL077 ICN → YYZ Jul 2, 01:20 UTCJul 2, 13:45 UTC12h 25m
2026-07-01 KAL752 HND → ICN Jul 1, 17:25 UTCJul 1, 19:25 UTC2h 0m
2026-07-01 KAL751 ICN → HND Jul 1, 11:50 UTCJul 1, 13:40 UTC1h 50m
2026-06-30 KAL078 YYZ → ICN Jun 30, 17:05 UTCJul 1, 06:40 UTC13h 35m
2026-06-30 KAL077 ICN → YYZ Jun 30, 01:04 UTCJun 30, 13:40 UTC12h 36m
2026-06-29 KAL752 - Jun 29, 17:14 UTCJun 29, 19:05 UTC1h 50m
2026-06-29 KAL751 ICN → HND Jun 29, 11:50 UTCJun 29, 13:39 UTC1h 50m
2026-06-28 KAL078 YYZ → ICN Jun 28, 17:10 UTCJun 29, 07:09 UTC14h 0m
2026-06-28 KAL077 ICN → YYZ Jun 28, 01:04 UTCJun 28, 13:19 UTC12h 15m
2026-06-27 KAL752 HND → ICN Jun 27, 17:20 UTCJun 27, 19:09 UTC1h 50m
2026-06-27 KAL751 ICN → HND Jun 27, 11:44 UTCJun 27, 13:30 UTC1h 45m
2026-06-26 KAL078 - Jun 26, 17:19 UTCJun 27, 07:24 UTC14h 5m
2026-06-26 KAL077 ICN → YYZ Jun 26, 01:10 UTCJun 26, 13:34 UTC12h 25m
2026-06-25 KAL752 HND → ICN Jun 25, 17:20 UTCJun 25, 19:09 UTC1h 50m
2026-06-25 KAL751 ICN → HND Jun 25, 11:44 UTCJun 25, 13:29 UTC1h 45m
2026-06-24 KAL078 YYZ → ICN Jun 24, 17:10 UTCJun 25, 06:55 UTC13h 45m
2026-06-24 KAL077 ICN → YYZ Jun 24, 01:04 UTCJun 24, 13:24 UTC12h 20m
2026-06-23 KAL932 - Jun 23, 06:04 UTCJun 23, 06:34 UTC30m
2026-06-22 KAL932 - Jun 22, 20:04 UTCJun 23, 05:20 UTC9h 15m
2026-06-22 KAL931 - Jun 22, 06:15 UTCJun 22, 17:44 UTC11h 30m
2026-06-22 KAL931 - Jun 22, 04:59 UTCJun 22, 05:15 UTC15m
2026-06-21 KAL752 HND → ICN Jun 21, 17:35 UTCJun 21, 19:29 UTC1h 55m
2026-06-21 KAL751 ICN → HND Jun 21, 11:49 UTCJun 21, 13:29 UTC1h 40m
2026-06-21 KAL932 - Jun 21, 06:19 UTCJun 21, 06:44 UTC25m
2026-06-20 KAL932 - Jun 20, 20:20 UTCJun 21, 05:35 UTC9h 15m
2026-06-20 KAL931 - Jun 20, 06:35 UTCJun 20, 17:49 UTC11h 15m
2026-06-20 KAL931 - Jun 20, 05:14 UTCJun 20, 05:34 UTC20m
2026-06-18 KAL078 YYZ → ICN Jun 18, 17:10 UTCJun 19, 06:24 UTC13h 14m
2026-06-18 KAL077 ICN → YYZ Jun 18, 01:00 UTCJun 18, 13:40 UTC12h 40m
2026-06-17 KAL752 HND → ICN Jun 17, 17:10 UTCJun 17, 18:55 UTC1h 45m
2026-06-17 KAL751 ICN → HND Jun 17, 11:45 UTCJun 17, 13:35 UTC1h 50m
2026-06-16 KAL078 YYZ → ICN Jun 16, 17:10 UTCJun 17, 06:55 UTC13h 46m
2026-06-16 KAL077 - Jun 16, 01:00 UTCJun 16, 13:25 UTC12h 25m
2026-06-15 KAL752 NGO → ICN Jun 15, 17:20 UTCJun 15, 19:10 UTC1h 50m
2026-06-15 KAL751 ICN → HND Jun 15, 11:45 UTCJun 15, 13:25 UTC1h 40m
2026-06-14 KAL078 YYZ → ICN Jun 14, 17:20 UTCJun 15, 07:20 UTC13h 59m
2026-06-14 KAL077 ICN → YYZ Jun 14, 01:15 UTCJun 14, 13:45 UTC12h 30m
2026-06-13 KAL752 NGO → ICN Jun 13, 17:15 UTCJun 13, 19:20 UTC2h 5m
2026-06-13 KAL751 ICN → NGO Jun 13, 11:55 UTCJun 13, 13:40 UTC1h 45m

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 HL8597 page for operator, model, and routing details .

Mode-S 71C597 frequently asked

What is Mode-S code 71C597?
71C597 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8597.
Where is Mode-S 71C597 registered?
Mode-S code 71C597 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 71C597 broadcasting right now?
Yes. Mode-S 71C597 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C597, octal 34342627, decimal 7,456,151.
What flights does 71C597 operate?
Mode-S 71C597 has broadcast 10 distinct callsigns, including KAL077, KAL078, KAL932, KAL931, KAL752.