Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C733

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

Currently assigned to HL8733 · BOEING 787-10 Dreamliner

Hex
71C733
Octal
34343463
Decimal
7,456,563
Country
KR
Tail
HL8733
Type
B78X
No current signal · last broadcast 13h ago
Flights observed
354
Distinct callsigns
20
Country
KR
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 71C733.

Country allocation

The ICAO 24-bit address 71C733 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 20 distinct

Callsign Airline Flights Last seen
KAL2104 - 74 2026-06-21
KAL2102 - 74 2026-06-21
KAL2103 - 70 2026-06-21
KAL2101 - 67 2026-06-21
KAL076 - 6 2026-07-04
KAL402 - 5 2026-07-13
KAL401 - 5 2026-07-13
KAL075 - 5 2026-07-03
KAL938 - 4 2026-07-07
KAL437 - 4 2026-06-29
KAL2021 - 4 2026-07-05
KAL937 - 3 2026-07-06
KAL438 - 3 2026-06-29
KAL2022 - 3 2026-07-05
KAL024 - 3 2026-07-07
KAL023 - 3 2026-07-07
KAL874 - 2 2026-06-30
KAL873 - 2 2026-06-30
KAL724 - 2 2026-07-10
KAL723 - 2 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 KAL402 SYD → ICN Jul 13, 22:45 UTCJul 14, 08:40 UTC9h 55m
2026-07-13 KAL401 ICN → SYD Jul 13, 11:00 UTCJul 13, 20:25 UTC9h 25m
2026-07-12 KAL402 SYD → ICN Jul 12, 22:40 UTCJul 13, 08:35 UTC9h 55m
2026-07-12 KAL401 ICN → SYD Jul 12, 10:40 UTCJul 12, 20:30 UTC9h 50m
2026-07-11 KAL072 YVR → ICN Jul 11, 22:20 UTCJul 12, 08:30 UTC10h 10m
2026-07-11 KAL071 ICN → YVR Jul 11, 10:05 UTCJul 11, 19:45 UTC9h 40m
2026-07-10 KAL042 SEA → ICN Jul 10, 21:05 UTCJul 11, 07:20 UTC10h 15m
2026-07-10 KAL041 ICN → SEA Jul 10, 08:05 UTCJul 10, 17:45 UTC9h 40m
2026-07-10 KAL724 KIX → ICN Jul 10, 04:05 UTCJul 10, 05:30 UTC1h 25m
2026-07-10 KAL723 - Jul 10, 00:45 UTCJul 10, 02:05 UTC1h 20m
2026-07-08 KAL402 SYD → ICN Jul 8, 22:45 UTCJul 9, 08:55 UTC10h 10m
2026-07-08 KAL401 ICN → SYD Jul 8, 11:00 UTCJul 8, 20:30 UTC9h 30m
2026-07-07 KAL024 - Jul 7, 20:45 UTCJul 8, 08:15 UTC11h 30m
2026-07-07 KAL023 - Jul 7, 07:30 UTCJul 7, 17:45 UTC10h 15m
2026-07-07 KAL938 - Jul 7, 02:30 UTCJul 7, 02:50 UTC20m
2026-07-06 KAL938 - Jul 6, 16:45 UTCJul 7, 01:35 UTC8h 50m
2026-07-06 KAL937 - Jul 6, 03:45 UTCJul 6, 14:20 UTC10h 35m
2026-07-06 KAL937 - Jul 6, 02:30 UTCJul 6, 02:45 UTC15m
2026-07-05 KAL2022 TPE → ICN Jul 5, 05:55 UTCJul 5, 08:05 UTC2h 10m
2026-07-05 KAL2021 - Jul 5, 02:05 UTCJul 5, 04:25 UTC2h 20m
2026-07-04 KAL076 YVR → ICN Jul 4, 08:10 UTCJul 4, 18:30 UTC10h 20m
2026-07-03 KAL075 ICN → YVR Jul 3, 14:20 UTCJul 3, 23:25 UTC9h 5m
2026-07-02 KAL024 - Jul 2, 21:15 UTCJul 3, 09:00 UTC11h 45m
2026-07-02 KAL023 ICN → SFO Jul 2, 07:20 UTCJul 2, 17:00 UTC9h 40m
2026-07-01 KAL448 - Jul 1, 16:30 UTCJul 1, 20:10 UTC3h 40m
2026-07-01 KAL447 - Jul 1, 10:30 UTCJul 1, 14:20 UTC3h 50m
2026-06-30 KAL402 SYD → ICN Jun 30, 22:25 UTCJul 1, 08:30 UTC10h 5m
2026-06-30 KAL401 ICN → SYD Jun 30, 10:35 UTCJun 30, 20:15 UTC9h 40m
2026-06-30 KAL874 - Jun 30, 07:40 UTCJun 30, 08:05 UTC25m
2026-06-30 KAL873 - Jun 30, 04:40 UTCJun 30, 05:00 UTC20m
2026-06-29 KAL438 - Jun 29, 21:14 UTCJun 30, 02:00 UTC4h 46m
2026-06-29 KAL437 - Jun 29, 17:10 UTCJun 29, 17:19 UTC10m
2026-06-29 KAL437 - Jun 29, 11:04 UTCJun 29, 15:49 UTC4h 45m
2026-06-28 KAL072 - Jun 28, 22:10 UTCJun 29, 08:50 UTC10h 40m
2026-06-28 KAL071 ICN → YVR Jun 28, 10:19 UTCJun 28, 19:25 UTC9h 5m
2026-06-28 KAL2022 TPE → ICN Jun 28, 05:40 UTCJun 28, 07:34 UTC1h 55m
2026-06-28 KAL2021 - Jun 28, 03:35 UTCJun 28, 03:55 UTC20m
2026-06-28 KAL2021 - Jun 28, 01:55 UTCJun 28, 02:34 UTC40m
2026-06-26 KAL402 SYD → ICN Jun 26, 23:00 UTCJun 27, 08:49 UTC9h 50m
2026-06-26 KAL401 ICN → SYD Jun 26, 10:55 UTCJun 26, 20:55 UTC10h 0m
2026-06-25 KAL024 - Jun 25, 20:09 UTCJun 26, 08:05 UTC11h 55m
2026-06-25 KAL023 - Jun 25, 07:30 UTCJun 25, 17:05 UTC9h 35m
2026-06-25 KAL938 - Jun 25, 02:39 UTCJun 25, 02:59 UTC20m
2026-06-24 KAL938 - Jun 24, 16:50 UTCJun 25, 01:50 UTC9h 0m
2026-06-24 KAL937 - Jun 24, 01:55 UTCJun 24, 14:00 UTC12h 5m
2026-06-23 KAL448 - Jun 23, 16:29 UTCJun 23, 20:04 UTC3h 35m
2026-06-23 KAL447 - Jun 23, 10:19 UTCJun 23, 13:59 UTC3h 40m
2026-06-23 KAL874 - Jun 23, 07:35 UTCJun 23, 08:04 UTC30m
2026-06-23 KAL873 - Jun 23, 04:39 UTCJun 23, 04:55 UTC15m
2026-06-22 KAL438 - Jun 22, 21:00 UTCJun 23, 02:04 UTC5h 5m

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 HL8733 page for operator, model, and routing details .

Mode-S 71C733 frequently asked

What is Mode-S code 71C733?
71C733 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8733.
Where is Mode-S 71C733 registered?
Mode-S code 71C733 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 71C733 broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C733, octal 34343463, decimal 7,456,563.
What flights does 71C733 operate?
Mode-S 71C733 has broadcast 20 distinct callsigns, including KAL2104, KAL2102, KAL2103, KAL2101, KAL076.