Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C598

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

Currently assigned to HL8598 · AIRBUS A-350-900

Hex
71C598
Octal
34342630
Decimal
7,456,152
Country
KR
Tail
HL8598
Type
A359
No current signal · last broadcast 4h ago
Flights observed
113
Distinct callsigns
12
Country
KR
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 71C598.

Country allocation

The ICAO 24-bit address 71C598 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 12 distinct

Callsign Airline Flights Last seen
KAL077 Korean Air 19 2026-05-30
KAL931 Korean Air 16 2026-05-18
KAL078 Korean Air 16 2026-05-28
KAL932 Korean Air 12 2026-05-19
KAL2011 Korean Air 12 2026-04-30
KAL2012 Korean Air 10 2026-04-30
KAL752 Korean Air 8 2026-05-27
KAL751 Korean Air 8 2026-05-27
KAL724 Korean Air 6 2026-05-15
KAL723 Korean Air 4 2026-05-15
KAL2028 Korean Air 1 2026-05-01
KAL2027 Korean Air 1 2026-05-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 KAL077 ICN → YYZ May 30, 00:55 UTCMay 30, 13:25 UTC12h 30m
2026-05-28 KAL078 YYZ → ICN May 28, 16:55 UTCMay 29, 07:30 UTC14h 35m
2026-05-28 KAL077 ICN → YYZ May 28, 01:10 UTCMay 28, 13:25 UTC12h 15m
2026-05-27 KAL752 NGO → ICN May 27, 17:20 UTCMay 27, 19:15 UTC1h 55m
2026-05-27 KAL751 ICN → NGO May 27, 11:45 UTCMay 27, 13:30 UTC1h 45m
2026-05-26 KAL078 YYZ → ICN May 26, 16:50 UTCMay 27, 06:49 UTC14h 0m
2026-05-26 KAL077 ICN → YYZ May 26, 01:10 UTCMay 26, 14:05 UTC12h 55m
2026-05-25 KAL752 NGO → ICN May 25, 17:25 UTCMay 25, 19:10 UTC1h 45m
2026-05-25 KAL751 ICN → NGO May 25, 11:50 UTCMay 25, 13:40 UTC1h 50m
2026-05-24 KAL078 YYZ → ICN May 24, 16:50 UTCMay 25, 06:05 UTC13h 15m
2026-05-24 KAL077 ICN → YYZ May 24, 01:05 UTCMay 24, 13:30 UTC12h 25m
2026-05-23 KAL752 NGO → ICN May 23, 17:20 UTCMay 23, 19:15 UTC1h 56m
2026-05-23 KAL751 ICN → NGO May 23, 11:55 UTCMay 23, 13:35 UTC1h 40m
2026-05-22 KAL078 YYZ → ICN May 22, 16:55 UTCMay 23, 07:35 UTC14h 40m
2026-05-22 KAL077 ICN → YYZ May 22, 01:05 UTCMay 22, 13:20 UTC12h 15m
2026-05-20 KAL078 YYZ → ICN May 20, 16:40 UTCMay 21, 07:05 UTC14h 25m
2026-05-20 KAL077 ICN → YYZ May 20, 01:15 UTCMay 20, 13:20 UTC12h 6m
2026-05-19 KAL932 FCO → ICN May 19, 06:05 UTCMay 19, 06:30 UTC25m
2026-05-18 KAL932 FCO → ICN May 18, 19:45 UTCMay 19, 05:15 UTC9h 30m
2026-05-18 KAL931 ICN → FCO May 18, 05:55 UTCMay 18, 17:10 UTC11h 15m
2026-05-18 KAL931 ICN → FCO May 18, 04:40 UTCMay 18, 04:55 UTC15m
2026-05-17 KAL752 NGO → ICN May 17, 17:20 UTCMay 17, 19:01 UTC1h 40m
2026-05-17 KAL751 ICN → NGO May 17, 11:50 UTCMay 17, 13:40 UTC1h 50m
2026-05-16 KAL078 YYZ → ICN May 16, 16:45 UTCMay 17, 06:30 UTC13h 45m
2026-05-16 KAL077 ICN → YYZ May 16, 01:05 UTCMay 16, 14:01 UTC12h 56m
2026-05-15 KAL724 KIX → ICN May 15, 04:00 UTCMay 15, 05:20 UTC1h 20m
2026-05-15 KAL723 ICN → KIX May 15, 01:05 UTCMay 15, 02:35 UTC1h 30m
2026-05-14 KAL752 NGO → ICN May 14, 17:30 UTCMay 14, 19:05 UTC1h 35m
2026-05-14 KAL751 ICN → NGO May 14, 11:45 UTCMay 14, 13:50 UTC2h 5m
2026-05-13 KAL078 YYZ → ICN May 13, 16:45 UTCMay 14, 06:30 UTC13h 45m
2026-05-13 KAL077 ICN → YYZ May 13, 01:05 UTCMay 13, 13:40 UTC12h 35m
2026-05-12 KAL752 NGO → ICN May 12, 17:25 UTCMay 12, 19:10 UTC1h 45m
2026-05-12 KAL751 ICN → NGO May 12, 11:50 UTCMay 12, 13:40 UTC1h 50m
2026-05-12 KAL932 FCO → ICN May 12, 06:30 UTCMay 12, 06:40 UTC10m
2026-05-11 KAL932 FCO → ICN May 11, 19:50 UTCMay 11, 22:35 UTC2h 44m
2026-05-11 KAL931 ICN → FCO May 11, 13:15 UTCMay 11, 17:25 UTC4h 10m
2026-05-11 KAL931 ICN → FCO May 11, 04:50 UTCMay 11, 05:00 UTC10m
2026-05-09 KAL932 FCO → ICN May 9, 19:49 UTCMay 9, 23:09 UTC3h 20m
2026-05-09 KAL931 ICN → FCO May 9, 06:10 UTCMay 9, 17:25 UTC11h 15m
2026-05-09 KAL931 ICN → FCO May 9, 04:55 UTCMay 9, 05:10 UTC15m
2026-05-08 KAL752 NGO → ICN May 8, 17:20 UTCMay 8, 19:15 UTC1h 55m
2026-05-08 KAL751 ICN → NGO May 8, 12:04 UTCMay 8, 13:45 UTC1h 40m
2026-05-08 KAL724 KIX → ICN May 8, 04:09 UTCMay 8, 05:39 UTC1h 30m
2026-05-08 KAL723 ICN → KIX May 8, 01:14 UTCMay 8, 02:35 UTC1h 20m
2026-05-07 KAL752 NGO → ICN May 7, 17:05 UTCMay 7, 19:00 UTC1h 55m
2026-05-07 KAL751 ICN → NGO May 7, 11:55 UTCMay 7, 13:35 UTC1h 40m
2026-05-06 KAL932 FCO → ICN May 6, 19:45 UTCMay 7, 05:20 UTC9h 35m
2026-05-06 KAL931 ICN → FCO May 6, 06:10 UTCMay 6, 17:30 UTC11h 20m
2026-05-06 KAL931 ICN → FCO May 6, 05:00 UTCMay 6, 05:10 UTC10m
2026-05-04 KAL932 FCO → ICN May 4, 19:35 UTCMay 5, 05:10 UTC9h 35m

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 HL8598 page for operator, model, and routing details .

Mode-S 71C598 frequently asked

What is Mode-S code 71C598?
71C598 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8598.
Where is Mode-S 71C598 registered?
Mode-S code 71C598 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 71C598 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C598, octal 34342630, decimal 7,456,152.
What flights does 71C598 operate?
Mode-S 71C598 has broadcast 12 distinct callsigns, including KAL077, KAL931, KAL078, KAL932, KAL2011.