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 Jul 26, 22:45 UTC
Flights observed
383
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 22:45 UTC

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
KAL402 Korean Air 8 2026-07-26
KAL401 Korean Air 7 2026-07-26
KAL938 Korean Air 6 2026-07-23
KAL076 - 6 2026-07-04
KAL937 Korean Air 5 2026-07-22
KAL075 - 5 2026-07-03
KAL437 - 4 2026-06-29
KAL2021 - 4 2026-07-05
KAL024 Korean Air 4 2026-07-23
KAL023 Korean Air 4 2026-07-23
KAL448 Korean Air 3 2026-07-24
KAL447 Korean Air 3 2026-07-24
KAL438 - 3 2026-06-29
KAL2022 - 3 2026-07-05
KAL072 Korean Air 3 2026-07-18
KAL071 - 3 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL402 SYD → ICN Jul 26, 22:30 UTCJul 26, 22:45 UTC15m
2026-07-26 KAL401 ICN → SYD Jul 26, 10:50 UTCJul 26, 20:35 UTC9h 45m
2026-07-25 KAL042 SEA → ICN Jul 25, 21:00 UTCJul 26, 07:55 UTC10h 56m
2026-07-25 KAL041 ICN → SEA Jul 25, 08:15 UTCJul 25, 17:55 UTC9h 40m
2026-07-24 KAL882 PVG → ICN Jul 24, 23:50 UTCJul 25, 05:30 UTC5h 40m
2026-07-24 KAL448 HAN → ICN Jul 24, 16:35 UTCJul 24, 20:20 UTC3h 45m
2026-07-24 KAL447 ICN → HAN Jul 24, 10:15 UTCJul 24, 10:50 UTC35m
2026-07-23 KAL024 SFO → ICN Jul 23, 20:40 UTCJul 24, 07:30 UTC10h 50m
2026-07-23 KAL023 ICN → SFO Jul 23, 07:35 UTCJul 23, 18:10 UTC10h 35m
2026-07-23 KAL938 VIE → ICN Jul 23, 02:45 UTCJul 23, 03:00 UTC15m
2026-07-22 KAL938 VIE → ICN Jul 22, 16:55 UTCJul 23, 01:50 UTC8h 55m
2026-07-22 KAL937 ICN → VIE Jul 22, 03:40 UTCJul 22, 14:15 UTC10h 35m
2026-07-22 KAL937 ICN → VIE Jul 22, 02:20 UTCJul 22, 02:40 UTC20m
2026-07-21 KAL402 SYD → ICN Jul 21, 07:30 UTCJul 21, 08:40 UTC1h 10m
2026-07-20 KAL402 SYD → ICN Jul 20, 22:45 UTCJul 20, 23:35 UTC50m
2026-07-20 KAL401 ICN → SYD Jul 20, 11:05 UTCJul 20, 20:40 UTC9h 35m
2026-07-20 KAL054 HNL → ICN Jul 20, 06:00 UTCJul 20, 08:15 UTC2h 15m
2026-07-19 KAL054 HNL → ICN Jul 19, 23:25 UTCJul 19, 23:40 UTC15m
2026-07-19 KAL053 ICN → HNL Jul 19, 12:20 UTCJul 19, 14:25 UTC2h 5m
2026-07-18 KAL072 YVR → ICN Jul 18, 22:15 UTCJul 19, 08:40 UTC10h 25m
2026-07-18 KAL071 ICN → YVR Jul 18, 10:15 UTCJul 18, 19:50 UTC9h 35m
2026-07-17 KAL042 SEA → ICN Jul 17, 21:00 UTCJul 18, 07:10 UTC10h 11m
2026-07-17 KAL041 ICN → SEA Jul 17, 08:04 UTCJul 17, 17:44 UTC9h 40m
2026-07-17 KAL918 - Jul 17, 04:25 UTCJul 17, 04:49 UTC25m
2026-07-16 KAL918 - Jul 16, 18:25 UTCJul 17, 03:39 UTC9h 15m
2026-07-16 KAL917 - Jul 16, 04:00 UTCJul 16, 15:25 UTC11h 25m
2026-07-16 KAL917 - Jul 16, 02:45 UTCJul 16, 03:10 UTC25m
2026-07-15 KAL434 ICN → ICN Jul 15, 09:20 UTCJul 15, 23:50 UTC14h 30m
2026-07-14 KAL881 ICN → ICN Jul 14, 23:45 UTCJul 15, 05:25 UTC5h 40m
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

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 Jul 26, 22:45 UTC.
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, KAL402.