Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C525

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

Currently assigned to HL8525 · AIRBUS A-321neo

Hex
71C525
Octal
34342445
Decimal
7,456,037
Country
KR
Tail
HL8525
Type
A21N
No current signal · last broadcast 3h ago
Flights observed
160
Distinct callsigns
20
Country
KR
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 71C525.

Country allocation

The ICAO 24-bit address 71C525 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
ABL781 Air Busan 18 2026-05-12
ABL126 Air Busan 14 2026-05-30
ABL125 Air Busan 13 2026-05-30
ABL121 Air Busan 9 2026-05-24
ABL8012 Air Busan 7 2026-05-25
ABL123 Air Busan 6 2026-05-28
ABL8823 Air Busan 5 2026-05-28
ABL8820 Air Busan 5 2026-05-28
ABL8819 Air Busan 5 2026-05-28
ABL8812 Air Busan 5 2026-05-28
ABL8803 Air Busan 5 2026-05-25
ABL793 Air Busan 5 2026-05-19
ABL782 - 5 2026-04-17
ABL726 Air Busan 5 2026-05-29
ABL725 Air Busan 5 2026-05-29
ABL773 Air Busan 4 2026-05-28
ABL122 Air Busan 4 2026-05-03
ABL794 Air Busan 3 2026-05-05
ABL7315 Air Busan 3 2026-05-30
ABL371 Air Busan 3 2026-05-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 ABL7315 PUS → DAD May 30, 10:20 UTCMay 30, 21:45 UTC11h 25m
2026-05-30 ABL125 KIX → PUS May 30, 05:15 UTCMay 30, 08:55 UTC3h 40m
2026-05-30 ABL126 PUS → KIX May 30, 03:00 UTCMay 30, 03:35 UTC35m
2026-05-29 ABL726 BKK → PUS May 29, 16:15 UTCMay 29, 19:40 UTC3h 25m
2026-05-29 ABL725 PUS → BKK May 29, 05:45 UTCMay 29, 14:50 UTC9h 5m
2026-05-28 ABL773 PUS → DAD May 28, 13:35 UTCMay 29, 04:00 UTC14h 25m
2026-05-28 ABL8823 GMP → PUS May 28, 09:55 UTCMay 28, 10:25 UTC30m
2026-05-28 ABL8820 PUS → GMP May 28, 08:25 UTCMay 28, 08:55 UTC30m
2026-05-28 ABL8819 GMP → PUS May 28, 06:35 UTCMay 28, 07:00 UTC25m
2026-05-28 ABL8812 PUS → GMP May 28, 05:00 UTCMay 28, 05:30 UTC30m
2026-05-28 ABL123 KIX → PUS May 28, 02:20 UTCMay 28, 02:55 UTC35m
2026-05-27 ABL774 DAD → PUS May 27, 12:25 UTCMay 28, 00:40 UTC12h 15m
2026-05-27 ABL8823 GMP → PUS May 27, 10:00 UTCMay 27, 10:35 UTC35m
2026-05-27 ABL8820 PUS → GMP May 27, 08:30 UTCMay 27, 09:00 UTC30m
2026-05-27 ABL8819 GMP → PUS May 27, 06:34 UTCMay 27, 07:05 UTC31m
2026-05-27 ABL8812 PUS → GMP May 27, 04:59 UTCMay 27, 05:40 UTC40m
2026-05-27 ABL123 KIX → PUS May 27, 02:24 UTCMay 27, 02:59 UTC35m
2026-05-27 ABL124 PUS → KIX May 27, 00:10 UTCMay 27, 00:49 UTC40m
2026-05-26 ABL145 FUK → PUS May 26, 07:10 UTCMay 26, 07:19 UTC10m
2026-05-25 ABL8803 GMP → PUS May 25, 22:40 UTCMay 25, 23:10 UTC30m
2026-05-25 ABL8012 CJU → GMP May 25, 11:25 UTCMay 25, 11:55 UTC30m
2026-05-24 ABL121 KIX → PUS May 24, 10:20 UTCMay 24, 13:00 UTC2h 40m
2026-05-24 ABL181 CTS → PUS May 24, 03:50 UTCMay 24, 08:50 UTC5h 0m
2026-05-24 ABL182 PUS → CTS May 24, 00:45 UTCMay 24, 02:30 UTC1h 45m
2026-05-23 ABL121 KIX → PUS May 23, 10:10 UTCMay 23, 13:10 UTC3h 0m
2026-05-23 ABL125 KIX → PUS May 23, 05:15 UTCMay 23, 08:35 UTC3h 20m
2026-05-23 ABL126 PUS → KIX May 23, 03:00 UTCMay 23, 03:40 UTC40m
2026-05-22 ABL726 BKK → PUS May 22, 16:35 UTCMay 22, 19:55 UTC3h 20m
2026-05-22 ABL725 PUS → BKK May 22, 05:45 UTCMay 22, 15:10 UTC9h 25m
2026-05-21 ABL773 PUS → DAD May 21, 12:30 UTCMay 22, 04:10 UTC15h 40m
2026-05-21 ABL8823 GMP → PUS May 21, 09:55 UTCMay 21, 10:25 UTC30m
2026-05-21 ABL8820 PUS → GMP May 21, 08:25 UTCMay 21, 09:00 UTC35m
2026-05-21 ABL8819 GMP → PUS May 21, 06:45 UTCMay 21, 07:10 UTC25m
2026-05-21 ABL8812 PUS → GMP May 21, 05:00 UTCMay 21, 05:40 UTC40m
2026-05-21 ABL123 KIX → PUS May 21, 02:15 UTCMay 21, 02:55 UTC40m
2026-05-20 ABL712 CEB → PUS May 20, 13:30 UTCMay 21, 00:55 UTC11h 25m
2026-05-20 ABL8823 GMP → PUS May 20, 10:20 UTCMay 20, 10:50 UTC30m
2026-05-20 ABL8820 PUS → GMP May 20, 08:45 UTCMay 20, 09:25 UTC40m
2026-05-20 ABL8819 GMP → PUS May 20, 06:55 UTCMay 20, 07:25 UTC30m
2026-05-20 ABL8812 PUS → GMP May 20, 04:55 UTCMay 20, 05:45 UTC50m
2026-05-20 ABL123 KIX → PUS May 20, 02:30 UTCMay 20, 03:05 UTC35m
2026-05-19 ABL726 BKK → PUS May 19, 16:15 UTCMay 20, 00:50 UTC8h 35m
2026-05-19 ABL725 PUS → BKK May 19, 05:35 UTCMay 19, 14:45 UTC9h 10m
2026-05-19 ABL793 PUS → TPE May 19, 02:20 UTCMay 19, 03:55 UTC1h 35m
2026-05-18 ABL8803 GMP → PUS May 18, 22:40 UTCMay 18, 23:10 UTC30m
2026-05-18 ABL8012 CJU → GMP May 18, 12:10 UTCMay 18, 12:35 UTC25m
2026-05-18 ABL123 KIX → PUS May 18, 02:25 UTCMay 18, 03:01 UTC35m
2026-05-17 ABL773 PUS → DAD May 17, 08:50 UTCMay 18, 00:55 UTC16h 5m
2026-05-17 ABL111 NRT → PUS May 17, 02:20 UTCMay 17, 07:20 UTC5h 0m
2026-05-16 ABL112 PUS → NRT May 16, 10:16 UTCMay 17, 01:00 UTC14h 45m

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 HL8525 page for operator, model, and routing details .

Mode-S 71C525 frequently asked

What is Mode-S code 71C525?
71C525 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8525.
Where is Mode-S 71C525 registered?
Mode-S code 71C525 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 71C525 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C525, octal 34342445, decimal 7,456,037.
What flights does 71C525 operate?
Mode-S 71C525 has broadcast 20 distinct callsigns, including ABL781, ABL126, ABL125, ABL121, ABL8012.