Apparatus

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sensors Mode-S transponder

71C528

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

Currently assigned to HL8528 · AIRBUS A-321neo

Hex
71C528
Octal
34342450
Decimal
7,456,040
Country
KR
Tail
HL8528
Type
A21N
Broadcasting now · callsign KAL656 · 35,050 ft
Flights observed
257
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 12:10 UTC

Current position

71C528 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C528 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
KAL712 - 15 2026-07-13
KAL711 - 14 2026-07-13
KAL2016 Korean Air 12 2026-05-30
KAL707 - 10 2026-07-26
KAL625 - 10 2026-07-08
KAL2005 Korean Air 10 2026-07-23
KAL626 - 9 2026-07-08
KAL2015 Korean Air 9 2026-05-30
KAL2006 Korean Air 8 2026-07-23
KAL708 - 7 2026-07-26
KAL770 Korean Air 6 2026-07-25
KAL769 Korean Air 6 2026-07-25
KAL706 - 6 2026-07-16
KAL705 - 6 2026-07-15
KAL486 Korean Air 5 2026-07-24
KAL2198 - 5 2026-07-18
KAL1406 - 5 2026-07-20
KAL1401 Korean Air 5 2026-07-19
KAL744 Korean Air 4 2026-06-11
KAL743 Korean Air 4 2026-06-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL708 - Jul 26, 10:10 UTCJul 26, 12:05 UTC1h 55m
2026-07-26 KAL707 ICN → NRT Jul 26, 06:30 UTCJul 26, 08:15 UTC1h 46m
2026-07-25 KAL770 AXT → ICN Jul 25, 07:30 UTCJul 25, 10:00 UTC2h 30m
2026-07-25 KAL769 ICN → AXT Jul 25, 03:55 UTCJul 25, 06:10 UTC2h 15m
2026-07-24 KAL486 PQC → ICN Jul 24, 22:10 UTCJul 24, 22:40 UTC30m
2026-07-24 KAL485 ICN → PQC Jul 24, 10:35 UTCJul 24, 21:35 UTC11h 0m
2026-07-24 KAL856 PEK → ICN Jul 24, 07:30 UTCJul 24, 07:50 UTC20m
2026-07-24 KAL856 PEK → ICN Jul 24, 06:20 UTCJul 24, 06:30 UTC10m
2026-07-24 KAL855 ICN → PEK Jul 24, 02:15 UTCJul 24, 02:40 UTC25m
2026-07-23 KAL2006 HKG → ICN Jul 23, 10:15 UTCJul 23, 13:25 UTC3h 10m
2026-07-23 KAL2005 ICN → HKG Jul 23, 04:55 UTCJul 23, 08:00 UTC3h 5m
2026-07-23 KAL1408 PUS → ICN Jul 23, 01:45 UTCJul 23, 02:35 UTC50m
2026-07-22 KAL1403 ICN → PUS Jul 22, 23:35 UTCJul 23, 00:20 UTC45m
2026-07-22 KAL162 KMG → ICN Jul 22, 18:50 UTCJul 22, 19:15 UTC25m
2026-07-22 KAL791 ICN → FUK Jul 22, 02:30 UTCJul 22, 03:25 UTC55m
2026-07-21 KAL852 PEK → ICN Jul 21, 12:00 UTCJul 21, 12:25 UTC25m
2026-07-21 KAL2065 CJU → PEK Jul 21, 07:10 UTCJul 21, 07:55 UTC45m
2026-07-21 KAL2066 - Jul 21, 04:05 UTCJul 21, 04:35 UTC30m
2026-07-21 KAL2066 - Jul 21, 03:10 UTCJul 21, 03:20 UTC10m
2026-07-20 KAL851 ICN → PEK Jul 20, 23:40 UTCJul 21, 00:10 UTC30m
2026-07-20 KAL738 KIX → ICN Jul 20, 17:30 UTCJul 20, 18:55 UTC1h 25m
2026-07-20 KAL737 ICN → KIX Jul 20, 12:10 UTCJul 20, 13:40 UTC1h 30m
2026-07-20 KAL770 - Jul 20, 07:40 UTCJul 20, 10:10 UTC2h 30m
2026-07-20 KAL769 ICN → CTS Jul 20, 03:55 UTCJul 20, 06:10 UTC2h 15m
2026-07-20 KAL1406 PUS → ICN Jul 20, 00:05 UTCJul 20, 00:50 UTC45m
2026-07-19 KAL1401 ICN → PUS Jul 19, 21:55 UTCJul 19, 22:40 UTC45m
2026-07-18 KAL2180 - Jul 18, 10:30 UTCJul 18, 11:30 UTC1h 0m
2026-07-18 KAL2179 - Jul 18, 07:50 UTCJul 18, 08:50 UTC1h 0m
2026-07-18 KAL2198 - Jul 18, 04:15 UTCJul 18, 05:55 UTC1h 40m
2026-07-18 KAL2197 - Jul 18, 01:15 UTCJul 18, 02:40 UTC1h 25m
2026-07-17 KAL2174 UKB → ICN Jul 17, 10:15 UTCJul 17, 11:35 UTC1h 20m
2026-07-17 KAL2173 ICN → UKB Jul 17, 07:20 UTCJul 17, 08:35 UTC1h 15m
2026-07-17 KAL2172 UKB → ICN Jul 17, 03:14 UTCJul 17, 04:35 UTC1h 20m
2026-07-17 KAL2171 ICN → UKB Jul 17, 00:25 UTCJul 17, 01:45 UTC1h 20m
2026-07-16 KAL796 - Jul 16, 11:20 UTCJul 16, 12:20 UTC1h 0m
2026-07-16 KAL795 - Jul 16, 05:45 UTCJul 16, 06:40 UTC55m
2026-07-16 KAL706 - Jul 16, 00:35 UTCJul 16, 02:35 UTC2h 0m
2026-07-15 KAL705 ICN → NRT Jul 15, 10:05 UTCJul 15, 12:00 UTC1h 55m
2026-07-15 KAL792 - Jul 15, 06:10 UTCJul 15, 07:15 UTC1h 5m
2026-07-15 KAL791 - Jul 15, 02:35 UTCJul 15, 03:20 UTC45m
2026-07-14 KAL726 KIX → ICN Jul 14, 09:35 UTCJul 14, 11:00 UTC1h 25m
2026-07-14 KAL725 ICN → KIX Jul 14, 06:20 UTCJul 14, 07:35 UTC1h 15m
2026-07-13 KAL1406 PUS → ICN Jul 13, 23:50 UTCJul 14, 00:30 UTC40m
2026-07-13 KAL1401 ICN → PUS Jul 13, 21:45 UTCJul 13, 22:30 UTC45m
2026-07-13 KAL712 - Jul 13, 08:50 UTCJul 13, 10:45 UTC1h 55m
2026-07-13 KAL711 ICN → NRT Jul 13, 04:15 UTCJul 13, 06:20 UTC2h 5m
2026-07-12 KAL656 - Jul 12, 19:55 UTCJul 13, 01:15 UTC5h 20m
2026-07-12 KAL655 - Jul 12, 12:40 UTCJul 12, 15:20 UTC2h 40m
2026-07-12 KAL712 - Jul 12, 08:35 UTCJul 12, 10:30 UTC1h 55m
2026-07-12 KAL711 ICN → NRT Jul 12, 04:15 UTCJul 12, 06:20 UTC2h 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 HL8528 page for operator, model, and routing details .

Mode-S 71C528 frequently asked

What is Mode-S code 71C528?
71C528 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8528.
Where is Mode-S 71C528 registered?
Mode-S code 71C528 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 71C528 broadcasting right now?
Yes. Mode-S 71C528 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C528, octal 34342450, decimal 7,456,040.
What flights does 71C528 operate?
Mode-S 71C528 has broadcast 20 distinct callsigns, including KAL712, KAL711, KAL2016, KAL707, KAL625.