Apparatus

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sensors Mode-S transponder

71C710

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

Currently assigned to HL8710 · AIRBUS A-321neo

Hex
71C710
Octal
34343420
Decimal
7,456,528
Country
KR
Tail
HL8710
Type
A21N
No current signal · last broadcast Jul 26, 19:25 UTC
Flights observed
389
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 19:25 UTC

Last known position

Most recent position reported by Mode-S 71C710.

Country allocation

The ICAO 24-bit address 71C710 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 Korean Air 18 2026-07-17
KAL2066 - 18 2026-07-04
KAL851 - 14 2026-07-16
KAL2065 - 11 2026-07-09
KAL161 Korean Air 11 2026-07-26
KAL162 Korean Air 10 2026-07-26
KAL738 - 9 2026-07-07
KAL737 - 9 2026-07-07
KAL485 - 9 2026-07-05
KAL792 Korean Air 8 2026-06-12
KAL791 - 8 2026-06-12
KAL770 - 8 2026-07-15
KAL769 - 8 2026-07-15
KAL626 Korean Air 8 2026-07-23
KAL625 Korean Air 8 2026-07-23
KAL1401 - 8 2026-06-20
KAL689 Korean Air 7 2026-06-04
KAL2174 - 7 2026-07-02
KAL2173 - 7 2026-07-02
KAL2172 - 7 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL162 KMG → ICN Jul 26, 18:55 UTCJul 26, 19:25 UTC30m
2026-07-26 KAL161 ICN → KMG Jul 26, 10:05 UTCJul 26, 10:30 UTC25m
2026-07-26 KAL2194 AOJ → ICN Jul 26, 03:55 UTCJul 26, 06:00 UTC2h 5m
2026-07-26 KAL2193 ICN → AOJ Jul 26, 00:25 UTCJul 26, 02:20 UTC1h 55m
2026-07-25 KAL714 NRT → ICN Jul 25, 12:10 UTCJul 25, 14:10 UTC2h 0m
2026-07-25 KAL713 ICN → NRT Jul 25, 08:30 UTCJul 25, 10:35 UTC2h 5m
2026-07-24 KAL2006 HKG → ICN Jul 24, 10:10 UTCJul 24, 13:25 UTC3h 15m
2026-07-24 KAL2005 ICN → HKG Jul 24, 05:00 UTCJul 24, 08:00 UTC3h 0m
2026-07-23 KAL626 CGK → ICN Jul 23, 17:25 UTCJul 23, 21:00 UTC3h 35m
2026-07-23 KAL625 ICN → CGK Jul 23, 12:10 UTCJul 23, 15:40 UTC3h 30m
2026-07-23 KAL2016 MFM → ICN Jul 23, 06:30 UTCJul 23, 09:40 UTC3h 10m
2026-07-23 KAL2015 ICN → MFM Jul 23, 01:35 UTCJul 23, 04:35 UTC3h 0m
2026-07-22 KAL626 CGK → ICN Jul 22, 17:30 UTCJul 22, 20:55 UTC3h 25m
2026-07-22 KAL625 ICN → CGK Jul 22, 11:45 UTCJul 22, 15:15 UTC3h 30m
2026-07-22 KAL101 ICN → NKG Jul 22, 01:45 UTCJul 22, 02:25 UTC40m
2026-07-21 KAL164 DYG → ICN Jul 21, 10:50 UTCJul 21, 18:35 UTC7h 45m
2026-07-21 KAL874 - Jul 21, 08:05 UTCJul 21, 08:25 UTC20m
2026-07-21 KAL873 - Jul 21, 04:50 UTCJul 21, 05:20 UTC30m
2026-07-20 KAL418 ICN → ICN Jul 20, 10:00 UTCJul 20, 20:15 UTC10h 15m
2026-07-20 KAL874 - Jul 20, 07:40 UTCJul 20, 08:05 UTC25m
2026-07-20 KAL873 - Jul 20, 04:40 UTCJul 20, 05:05 UTC25m
2026-07-19 KAL162 KMG → ICN Jul 19, 19:05 UTCJul 19, 19:25 UTC20m
2026-07-19 KAL161 - Jul 19, 10:00 UTCJul 19, 10:25 UTC25m
2026-07-19 KAL2194 AOJ → ICN Jul 19, 04:15 UTCJul 19, 06:05 UTC1h 50m
2026-07-19 KAL2193 ICN → AOJ Jul 19, 00:15 UTCJul 19, 02:15 UTC2h 0m
2026-07-18 KAL418 ICN → ICN Jul 18, 09:50 UTCJul 18, 20:30 UTC10h 40m
2026-07-18 KAL2148 - Jul 18, 05:30 UTCJul 18, 06:15 UTC45m
2026-07-18 KAL2148 - Jul 18, 04:20 UTCJul 18, 04:35 UTC15m
2026-07-18 KAL2147 - Jul 18, 01:00 UTCJul 18, 02:45 UTC1h 45m
2026-07-17 KAL852 PEK → ICN Jul 17, 11:45 UTCJul 17, 12:15 UTC30m
2026-07-16 KAL851 - Jul 16, 23:49 UTCJul 17, 07:25 UTC7h 35m
2026-07-16 KAL626 - Jul 16, 17:35 UTCJul 16, 21:05 UTC3h 30m
2026-07-16 KAL625 ICN → MNL Jul 16, 12:00 UTCJul 16, 15:40 UTC3h 40m
2026-07-16 KAL125 ICN → ICN Jul 16, 01:45 UTCJul 16, 09:05 UTC7h 20m
2026-07-15 KAL626 - Jul 15, 17:45 UTCJul 15, 21:30 UTC3h 45m
2026-07-15 KAL625 ICN → MNL Jul 15, 12:25 UTCJul 15, 15:55 UTC3h 30m
2026-07-15 KAL770 - Jul 15, 07:35 UTCJul 15, 10:00 UTC2h 25m
2026-07-15 KAL769 ICN → CTS Jul 15, 03:55 UTCJul 15, 06:10 UTC2h 15m
2026-07-14 KAL656 - Jul 14, 22:15 UTCJul 15, 01:05 UTC2h 49m
2026-07-14 KAL656 - Jul 14, 20:05 UTCJul 14, 20:15 UTC10m
2026-07-14 KAL655 - Jul 14, 13:05 UTCJul 14, 18:10 UTC5h 5m
2026-07-14 KAL712 - Jul 14, 08:30 UTCJul 14, 10:45 UTC2h 15m
2026-07-14 KAL711 ICN → NRT Jul 14, 04:20 UTCJul 14, 06:20 UTC2h 0m
2026-07-13 KAL876 - Jul 13, 13:15 UTCJul 13, 13:30 UTC15m
2026-07-13 KAL875 - Jul 13, 09:50 UTCJul 13, 10:15 UTC25m
2026-07-12 KAL162 - Jul 12, 19:30 UTCJul 12, 19:55 UTC25m
2026-07-12 KAL161 - Jul 12, 09:55 UTCJul 12, 10:10 UTC15m
2026-07-12 KAL101 ICN → ICN Jul 12, 01:45 UTCJul 12, 07:05 UTC5h 20m
2026-07-10 KAL418 ICN → ICN Jul 10, 09:40 UTCJul 10, 20:10 UTC10h 30m
2026-07-10 KAL102 - Jul 10, 01:45 UTCJul 10, 07:00 UTC5h 15m

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 HL8710 page for operator, model, and routing details .

Mode-S 71C710 frequently asked

What is Mode-S code 71C710?
71C710 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8710.
Where is Mode-S 71C710 registered?
Mode-S code 71C710 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 71C710 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C710, octal 34343420, decimal 7,456,528.
What flights does 71C710 operate?
Mode-S 71C710 has broadcast 20 distinct callsigns, including KAL852, KAL2066, KAL851, KAL2065, KAL161.