Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C711

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

Currently assigned to HL8711 · AIRBUS A-321neo

Hex
71C711
Octal
34343421
Decimal
7,456,529
Country
KR
Tail
HL8711
Type
A21N
No current signal · last broadcast 54m ago
Flights observed
363
Distinct callsigns
20
Country
KR
Last broadcast
54m ago

Last known position

Most recent position reported by Mode-S 71C711.

Country allocation

The ICAO 24-bit address 71C711 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
KAL852 - 14 2026-07-12
KAL851 - 11 2026-07-11
KAL2148 Korean Air 11 2026-05-30
KAL2066 - 11 2026-07-12
KAL2005 - 11 2026-07-11
KAL2147 Korean Air 10 2026-05-11
KAL738 - 9 2026-07-13
KAL737 - 9 2026-07-13
KAL726 Korean Air 9 2026-06-12
KAL1408 - 9 2026-07-14
KAL1403 - 9 2026-07-13
KAL725 Korean Air 8 2026-06-12
KAL689 - 8 2026-06-30
KAL2006 - 8 2026-07-11
KAL742 Korean Air 7 2026-05-26
KAL626 Korean Air 7 2026-06-14
KAL625 Korean Air 7 2026-06-14
KAL2015 - 7 2026-07-08
KAL1401 - 7 2026-07-14
KAL741 Korean Air 6 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KAL1406 - Jul 14, 23:45 UTCJul 15, 00:15 UTC30m
2026-07-14 KAL1401 ICN → PUS Jul 14, 21:50 UTCJul 14, 22:30 UTC40m
2026-07-14 KAL164 - Jul 14, 17:45 UTCJul 14, 18:25 UTC40m
2026-07-14 KAL163 - Jul 14, 10:40 UTCJul 14, 11:30 UTC50m
2026-07-14 KAL1408 PUS → ICN Jul 14, 01:35 UTCJul 14, 02:20 UTC45m
2026-07-13 KAL1403 ICN → PUS Jul 13, 23:30 UTCJul 14, 00:10 UTC40m
2026-07-13 KAL738 KIX → ICN Jul 13, 17:20 UTCJul 13, 18:50 UTC1h 30m
2026-07-13 KAL737 ICN → KIX Jul 13, 12:15 UTCJul 13, 13:30 UTC1h 15m
2026-07-13 KAL770 - Jul 13, 07:40 UTCJul 13, 10:00 UTC2h 20m
2026-07-13 KAL769 ICN → CTS Jul 13, 03:50 UTCJul 13, 06:15 UTC2h 25m
2026-07-12 KAL852 - Jul 12, 11:50 UTCJul 12, 12:10 UTC20m
2026-07-12 KAL852 - Jul 12, 10:45 UTCJul 12, 11:01 UTC15m
2026-07-12 KAL2065 - Jul 12, 06:55 UTCJul 12, 07:31 UTC35m
2026-07-12 KAL2066 - Jul 12, 03:55 UTCJul 12, 04:20 UTC25m
2026-07-12 KAL2066 - Jul 12, 03:01 UTCJul 12, 03:15 UTC14m
2026-07-11 KAL851 - Jul 11, 23:30 UTCJul 11, 23:55 UTC25m
2026-07-11 KAL2006 - Jul 11, 13:10 UTCJul 11, 13:55 UTC45m
2026-07-11 KAL2006 - Jul 11, 10:40 UTCJul 11, 11:00 UTC20m
2026-07-11 KAL2005 - Jul 11, 05:45 UTCJul 11, 09:05 UTC3h 20m
2026-07-11 KAL656 - Jul 11, 01:10 UTCJul 11, 01:25 UTC15m
2026-07-10 KAL656 - Jul 10, 20:10 UTCJul 10, 21:55 UTC1h 45m
2026-07-10 KAL655 ICN → BKK Jul 10, 13:00 UTCJul 10, 18:10 UTC5h 10m
2026-07-10 KAL2190 - Jul 10, 01:40 UTCJul 10, 03:25 UTC1h 45m
2026-07-09 KAL2189 - Jul 9, 22:55 UTCJul 10, 00:20 UTC1h 25m
2026-07-09 KAL417 ICN → ICN Jul 9, 09:45 UTCJul 9, 20:25 UTC10h 40m
2026-07-09 KAL2194 - Jul 9, 04:10 UTCJul 9, 06:25 UTC2h 15m
2026-07-09 KAL2193 - Jul 9, 00:25 UTCJul 9, 02:20 UTC1h 55m
2026-07-08 KAL2016 - Jul 8, 07:55 UTCJul 8, 11:10 UTC3h 15m
2026-07-08 KAL2015 - Jul 8, 03:05 UTCJul 8, 06:15 UTC3h 10m
2026-07-07 KAL486 - Jul 7, 12:15 UTCJul 7, 22:55 UTC10h 40m
2026-07-07 KAL485 - Jul 7, 10:35 UTCJul 7, 11:20 UTC45m
2026-07-07 KAL792 - Jul 7, 06:15 UTCJul 7, 07:20 UTC1h 5m
2026-07-07 KAL791 - Jul 7, 02:15 UTCJul 7, 03:05 UTC50m
2026-07-06 KAL772 - Jul 6, 12:00 UTCJul 6, 14:30 UTC2h 30m
2026-07-06 KAL771 ICN → CTS Jul 6, 08:20 UTCJul 6, 10:35 UTC2h 15m
2026-07-05 KAL690 - Jul 5, 10:10 UTCJul 5, 21:55 UTC11h 45m
2026-07-05 KAL856 - Jul 5, 07:05 UTCJul 5, 07:25 UTC20m
2026-07-05 KAL856 - Jul 5, 06:05 UTCJul 5, 06:15 UTC10m
2026-07-05 KAL855 - Jul 5, 02:00 UTCJul 5, 02:20 UTC20m
2026-07-04 KAL458 ICN → ICN Jul 4, 03:10 UTCJul 4, 13:40 UTC10h 30m
2026-07-03 KAL738 KIX → ICN Jul 3, 17:30 UTCJul 3, 19:00 UTC1h 30m
2026-07-03 KAL737 ICN → KIX Jul 3, 12:40 UTCJul 3, 13:55 UTC1h 15m
2026-07-03 KAL2016 - Jul 3, 07:50 UTCJul 3, 11:05 UTC3h 15m
2026-07-03 KAL2015 - Jul 3, 01:30 UTCJul 3, 05:00 UTC3h 30m
2026-07-02 KAL457 - Jul 2, 03:20 UTCJul 2, 13:30 UTC10h 10m
2026-07-01 KAL2006 - Jul 1, 10:20 UTCJul 1, 13:20 UTC3h 0m
2026-07-01 KAL2005 - Jul 1, 07:50 UTCJul 1, 08:15 UTC25m
2026-07-01 KAL2005 - Jul 1, 05:00 UTCJul 1, 07:20 UTC2h 20m
2026-06-30 KAL689 ICN → ICN Jun 30, 10:30 UTCJun 30, 21:50 UTC11h 20m
2026-06-30 KAL792 - Jun 30, 06:25 UTCJun 30, 07:15 UTC50m

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 HL8711 page for operator, model, and routing details .

Mode-S 71C711 frequently asked

What is Mode-S code 71C711?
71C711 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8711.
Where is Mode-S 71C711 registered?
Mode-S code 71C711 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 71C711 broadcasting right now?
No active broadcast right now. Last signal was 54m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C711, octal 34343421, decimal 7,456,529.
What flights does 71C711 operate?
Mode-S 71C711 has broadcast 20 distinct callsigns, including KAL852, KAL851, KAL2148, KAL2066, KAL2005.