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 ABL8823 · 275 ft
Flights observed
510
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 21:45 UTC

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
ABL792 Air Busan 23 2026-07-21
ABL8823 - 22 2026-07-17
ABL8820 - 22 2026-07-17
ABL8819 - 22 2026-07-16
ABL123 Air Busan 22 2026-07-20
ABL8812 - 21 2026-07-16
ABL796 Air Busan 21 2026-07-26
ABL795 Air Busan 21 2026-07-26
ABL793 - 19 2026-07-18
ABL781 Air Busan 19 2026-07-26
ABL773 - 19 2026-07-20
ABL791 Air Busan 18 2026-07-21
ABL111 Air Busan 17 2026-07-21
ABL794 - 16 2026-07-18
ABL112 - 16 2026-07-20
ABL782 Air Busan 14 2026-07-26
ABL124 - 14 2026-07-19
ABL8826 - 10 2026-07-17
ABL121 - 10 2026-07-11
ABL8803 - 8 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ABL782 CXR → PUS Jul 26, 20:55 UTCJul 26, 21:40 UTC45m
2026-07-26 ABL781 PUS → CXR Jul 26, 11:10 UTCJul 26, 19:45 UTC8h 35m
2026-07-26 ABL796 KHH → PUS Jul 26, 08:55 UTCJul 26, 09:20 UTC25m
2026-07-26 ABL796 KHH → PUS Jul 26, 07:05 UTCJul 26, 07:50 UTC45m
2026-07-26 ABL795 PUS → KHH Jul 26, 03:30 UTCJul 26, 05:50 UTC2h 20m
2026-07-26 ABL8106 CJU → PUS Jul 26, 01:40 UTCJul 26, 01:55 UTC15m
2026-07-25 ABL8107 PUS → CJU Jul 25, 23:25 UTCJul 25, 23:45 UTC20m
2026-07-25 ABL782 CXR → PUS Jul 25, 21:00 UTCJul 25, 21:35 UTC35m
2026-07-25 ABL781 PUS → CXR Jul 25, 10:40 UTCJul 25, 19:45 UTC9h 5m
2026-07-25 ABL796 KHH → PUS Jul 25, 08:10 UTCJul 25, 08:35 UTC25m
2026-07-25 ABL796 KHH → PUS Jul 25, 06:15 UTCJul 25, 07:05 UTC50m
2026-07-25 ABL795 PUS → KHH Jul 25, 02:40 UTCJul 25, 05:00 UTC2h 20m
2026-07-25 ABL8106 CJU → PUS Jul 25, 00:30 UTCJul 25, 00:55 UTC25m
2026-07-24 ABL8025 GMP → CJU Jul 24, 22:25 UTCJul 24, 23:05 UTC40m
2026-07-24 ABL8012 CJU → GMP Jul 24, 11:35 UTCJul 24, 12:20 UTC45m
2026-07-24 ABL8135 PUS → CJU Jul 24, 09:10 UTCJul 24, 09:30 UTC20m
2026-07-24 ABL337 PUS → YNJ Jul 24, 00:55 UTCJul 24, 07:00 UTC6h 5m
2026-07-23 ABL782 CXR → PUS Jul 23, 20:50 UTCJul 23, 21:30 UTC40m
2026-07-23 ABL782 CXR → PUS Jul 23, 12:40 UTCJul 23, 19:40 UTC7h 0m
2026-07-23 ABL781 - Jul 23, 11:05 UTCJul 23, 11:20 UTC15m
2026-07-23 ABL337 PUS → YNJ Jul 23, 01:05 UTCJul 23, 07:25 UTC6h 20m
2026-07-22 ABL782 CXR → PUS Jul 22, 11:10 UTCJul 22, 21:10 UTC10h 0m
2026-07-22 ABL8028 CJU → GMP Jul 22, 05:05 UTCJul 22, 05:25 UTC20m
2026-07-22 ABL8109 PUS → CJU Jul 22, 03:10 UTCJul 22, 03:30 UTC20m
2026-07-22 ABL8102 CJU → PUS Jul 22, 01:45 UTCJul 22, 02:00 UTC15m
2026-07-21 ABL8105 - Jul 21, 23:35 UTCJul 21, 23:50 UTC15m
2026-07-21 ABL382 MFM → PUS Jul 21, 18:10 UTCJul 21, 21:25 UTC3h 15m
2026-07-21 ABL381 PUS → MFM Jul 21, 13:00 UTCJul 21, 15:50 UTC2h 50m
2026-07-21 ABL792 TPE → PUS Jul 21, 10:45 UTCJul 21, 11:05 UTC20m
2026-07-21 ABL792 TPE → PUS Jul 21, 09:15 UTCJul 21, 09:40 UTC25m
2026-07-21 ABL791 PUS → TPE Jul 21, 06:05 UTCJul 21, 08:05 UTC2h 0m
2026-07-21 ABL111 NRT → PUS Jul 21, 02:25 UTCJul 21, 04:05 UTC1h 40m
2026-07-20 ABL112 PUS → NRT Jul 20, 23:10 UTCJul 21, 00:50 UTC1h 40m
2026-07-20 ABL773 PUS → PUS Jul 20, 12:15 UTCJul 20, 21:40 UTC9h 25m
2026-07-20 ABL8116 CJU → PUS Jul 20, 10:20 UTCJul 20, 10:40 UTC20m
2026-07-20 ABL8117 PUS → CJU Jul 20, 08:10 UTCJul 20, 08:30 UTC20m
2026-07-20 ABL123 KIX → PUS Jul 20, 02:45 UTCJul 20, 03:45 UTC1h 0m
2026-07-19 ABL124 PUS → KIX Jul 19, 23:50 UTCJul 20, 00:50 UTC1h 0m
2026-07-19 ABL782 PUS → PUS Jul 19, 11:10 UTCJul 19, 21:30 UTC10h 20m
2026-07-19 ABL796 - Jul 19, 08:15 UTCJul 19, 08:30 UTC15m
2026-07-19 ABL796 - Jul 19, 06:25 UTCJul 19, 07:10 UTC45m
2026-07-19 ABL795 PUS → KHH Jul 19, 02:50 UTCJul 19, 05:10 UTC2h 20m
2026-07-19 ABL8106 - Jul 19, 00:50 UTCJul 19, 01:05 UTC15m
2026-07-18 ABL8107 - Jul 18, 22:50 UTCJul 18, 23:05 UTC15m
2026-07-18 ABL762 BKI → PUS Jul 18, 16:35 UTCJul 18, 21:15 UTC4h 40m
2026-07-18 ABL761 PUS → BKI Jul 18, 10:35 UTCJul 18, 15:05 UTC4h 30m
2026-07-18 ABL794 - Jul 18, 07:30 UTCJul 18, 07:50 UTC20m
2026-07-18 ABL794 - Jul 18, 06:00 UTCJul 18, 06:20 UTC20m
2026-07-18 ABL793 - Jul 18, 04:10 UTCJul 18, 04:35 UTC25m
2026-07-18 ABL793 - Jul 18, 02:40 UTCJul 18, 03:00 UTC21m

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 ABL792, ABL8823, ABL8820, ABL8819, ABL123.