Apparatus

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sensors Mode-S transponder

71C357

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

Currently assigned to HL8357 · BOEING 737 MAX 8

Hex
71C357
Octal
34341527
Decimal
7,455,575
Country
KR
Tail
HL8357
Type
B38M
Broadcasting now · callsign ABL793 · 17,350 ft
Flights observed
186
Distinct callsigns
20
Country
KR
Last broadcast
3h ago

Current position

71C357 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C357 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
ABL8823 Air Busan 12 2026-05-29
ABL8820 Air Busan 12 2026-05-29
ABL795 Air Busan 12 2026-05-25
ABL8819 Air Busan 11 2026-05-29
ABL8812 Air Busan 11 2026-05-29
ABL781 Air Busan 11 2026-05-02
ABL123 Air Busan 11 2026-05-29
ABL793 Air Busan 8 2026-05-24
ABL121 Air Busan 7 2026-05-28
ABL796 Air Busan 6 2026-05-02
ABL773 Air Busan 6 2026-05-16
ABL7315 Air Busan 5 2026-05-29
ABL126 Air Busan 5 2026-05-28
ABL125 Air Busan 5 2026-05-27
ABL8826 Air Busan 4 2026-05-22
ABL726 Air Busan 4 2026-05-24
ABL124 Air Busan 4 2026-05-14
ABL122 Air Busan 4 2026-05-28
ABL111 Air Busan 4 2026-05-21
ABL8803 Air Busan 3 2026-05-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ABL7315 PUS → DAD May 29, 13:45 UTCMay 29, 22:10 UTC8h 25m
2026-05-29 ABL8823 GMP → PUS May 29, 10:20 UTCMay 29, 10:45 UTC25m
2026-05-29 ABL8820 PUS → GMP May 29, 08:40 UTCMay 29, 09:15 UTC35m
2026-05-29 ABL8819 GMP → PUS May 29, 06:40 UTCMay 29, 07:10 UTC30m
2026-05-29 ABL8812 PUS → GMP May 29, 05:10 UTCMay 29, 05:45 UTC35m
2026-05-29 ABL123 KIX → PUS May 29, 02:20 UTCMay 29, 03:00 UTC40m
2026-05-28 ABL121 KIX → PUS May 28, 10:25 UTCMay 29, 00:40 UTC14h 15m
2026-05-28 ABL122 PUS → KIX May 28, 05:20 UTCMay 28, 08:55 UTC3h 35m
2026-05-28 ABL126 PUS → KIX May 28, 02:55 UTCMay 28, 03:30 UTC35m
2026-05-27 ABL342 - May 27, 13:15 UTCMay 27, 20:35 UTC7h 20m
2026-05-27 ABL121 KIX → PUS May 27, 10:15 UTCMay 27, 10:55 UTC40m
2026-05-27 ABL125 KIX → PUS May 27, 05:19 UTCMay 27, 08:50 UTC3h 31m
2026-05-27 ABL126 PUS → KIX May 27, 02:59 UTCMay 27, 03:45 UTC45m
2026-05-26 ABL782 CXR → PUS May 26, 06:34 UTCMay 26, 19:15 UTC12h 40m
2026-05-25 ABL795 PUS → KHH May 25, 11:20 UTCMay 26, 05:20 UTC17h 59m
2026-05-25 ABL795 PUS → KHH May 25, 06:25 UTCMay 26, 05:20 UTC22h 55m
2026-05-24 ABL726 BKK → PUS May 24, 16:15 UTCMay 25, 04:50 UTC12h 35m
2026-05-24 ABL725 PUS → BKK May 24, 05:50 UTCMay 24, 14:20 UTC8h 30m
2026-05-24 ABL793 PUS → TPE May 24, 03:30 UTCMay 24, 04:20 UTC50m
2026-05-23 ABL7315 PUS → DAD May 23, 14:45 UTCMay 24, 02:20 UTC11h 35m
2026-05-23 ABL7315 PUS → DAD May 23, 06:35 UTCMay 24, 02:20 UTC19h 45m
2026-05-23 ABL795 PUS → KHH May 23, 04:00 UTCMay 23, 05:00 UTC1h 0m
2026-05-22 ABL8025 GMP → CJU May 22, 22:25 UTCMay 22, 22:50 UTC25m
2026-05-22 ABL8826 PUS → GMP May 22, 11:45 UTCMay 22, 12:20 UTC35m
2026-05-22 ABL8823 GMP → PUS May 22, 10:00 UTCMay 22, 10:25 UTC25m
2026-05-22 ABL8820 PUS → GMP May 22, 08:20 UTCMay 22, 08:55 UTC35m
2026-05-21 ABL712 CEB → PUS May 21, 09:15 UTCMay 21, 19:15 UTC10h 0m
2026-05-21 ABL111 NRT → PUS May 21, 03:05 UTCMay 21, 08:05 UTC5h 0m
2026-05-20 ABL112 PUS → NRT May 20, 23:50 UTCMay 21, 01:30 UTC1h 40m
2026-05-20 ABL121 KIX → PUS May 20, 10:15 UTCMay 20, 21:20 UTC11h 5m
2026-05-20 ABL125 KIX → PUS May 20, 05:15 UTCMay 20, 08:50 UTC3h 35m
2026-05-20 ABL126 PUS → KIX May 20, 03:00 UTCMay 20, 03:40 UTC40m
2026-05-19 ABL1315 TAK → PUS May 19, 10:40 UTCMay 19, 11:05 UTC25m
2026-05-18 ABL602 DPS → PUS May 18, 19:45 UTCMay 19, 09:30 UTC13h 45m
2026-05-18 ABL601 PUS → DPS May 18, 11:50 UTCMay 19, 09:30 UTC21h 39m
2026-05-18 ABL601 PUS → DPS May 18, 10:10 UTCMay 19, 09:30 UTC23h 19m
2026-05-18 ABL601 PUS → DPS May 18, 05:45 UTCMay 18, 22:20 UTC16h 34m
2026-05-17 ABL793 PUS → TPE May 17, 13:15 UTCMay 18, 03:55 UTC14h 40m
2026-05-16 ABL773 PUS → DAD May 16, 13:21 UTCMay 16, 20:20 UTC7h 0m
2026-05-16 ABL337 PUS → YNJ May 16, 00:50 UTCMay 16, 06:41 UTC5h 51m
2026-05-15 ABL8803 GMP → PUS May 15, 22:40 UTCMay 15, 23:10 UTC30m
2026-05-15 ABL8826 PUS → GMP May 15, 12:15 UTCMay 15, 12:45 UTC30m
2026-05-15 ABL8823 GMP → PUS May 15, 10:20 UTCMay 15, 10:50 UTC30m
2026-05-15 ABL8820 PUS → GMP May 15, 08:45 UTCMay 15, 09:15 UTC30m
2026-05-15 ABL8819 GMP → PUS May 15, 06:40 UTCMay 15, 07:10 UTC30m
2026-05-15 ABL8812 PUS → GMP May 15, 05:05 UTCMay 15, 05:35 UTC30m
2026-05-15 ABL123 KIX → PUS May 15, 02:20 UTCMay 15, 02:55 UTC35m
2026-05-14 ABL773 PUS → DAD May 14, 12:30 UTCMay 15, 01:05 UTC12h 35m
2026-05-14 ABL8823 GMP → PUS May 14, 09:50 UTCMay 14, 10:25 UTC35m
2026-05-14 ABL8820 PUS → GMP May 14, 08:25 UTCMay 14, 08:55 UTC30m

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 HL8357 page for operator, model, and routing details .

Mode-S 71C357 frequently asked

What is Mode-S code 71C357?
71C357 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8357.
Where is Mode-S 71C357 registered?
Mode-S code 71C357 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 71C357 broadcasting right now?
Yes. Mode-S 71C357 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C357, octal 34341527, decimal 7,455,575.
What flights does 71C357 operate?
Mode-S 71C357 has broadcast 20 distinct callsigns, including ABL8823, ABL8820, ABL795, ABL8819, ABL8812.