Apparatus

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sensors Mode-S transponder

71C394

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

Currently assigned to HL8394 · AIRBUS A-321neo

Hex
71C394
Octal
34341624
Decimal
7,455,636
Country
KR
Tail
HL8394
Type
A21N
Broadcasting now · callsign ABL601 · 32,050 ft
Flights observed
434
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 21:40 UTC

Current position

71C394 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C394 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
ABL726 Air Busan 42 2026-07-26
ABL725 Air Busan 38 2026-07-26
ABL602 Air Busan 30 2026-07-22
ABL794 - 22 2026-07-19
ABL793 - 21 2026-07-19
ABL601 Air Busan 20 2026-07-20
ABL8826 Air Busan 14 2026-07-25
ABL8803 Air Busan 14 2026-07-25
ABL337 Air Busan 11 2026-07-26
ABL8823 Air Busan 10 2026-07-25
ABL8820 Air Busan 10 2026-07-25
ABL8812 Air Busan 10 2026-07-25
ABL773 - 10 2026-07-14
ABL182 Air Busan 10 2026-07-23
ABL181 Air Busan 10 2026-07-23
ABL1635 Air Busan 10 2026-07-20
ABL8819 Air Busan 9 2026-07-25
ABL382 - 9 2026-07-07
ABL381 - 6 2026-07-07
ABL371 - 6 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ABL726 BKK → PUS Jul 26, 20:55 UTCJul 26, 21:35 UTC40m
2026-07-26 ABL726 BKK → PUS Jul 26, 16:20 UTCJul 26, 19:45 UTC3h 25m
2026-07-26 ABL725 PUS → BKK Jul 26, 10:35 UTCJul 26, 14:05 UTC3h 30m
2026-07-26 ABL725 PUS → BKK Jul 26, 09:15 UTCJul 26, 09:35 UTC20m
2026-07-26 ABL337 PUS → YNJ Jul 26, 01:10 UTCJul 26, 07:30 UTC6h 21m
2026-07-25 ABL8803 GMP → PUS Jul 25, 22:40 UTCJul 25, 23:20 UTC40m
2026-07-25 ABL8826 PUS → GMP Jul 25, 11:55 UTCJul 25, 12:40 UTC45m
2026-07-25 ABL8823 GMP → PUS Jul 25, 10:10 UTCJul 25, 11:00 UTC50m
2026-07-25 ABL8820 PUS → GMP Jul 25, 08:25 UTCJul 25, 09:15 UTC50m
2026-07-25 ABL8819 GMP → PUS Jul 25, 06:40 UTCJul 25, 07:25 UTC45m
2026-07-25 ABL8812 PUS → GMP Jul 25, 05:00 UTCJul 25, 05:45 UTC45m
2026-07-25 ABL123 KIX → PUS Jul 25, 02:35 UTCJul 25, 03:40 UTC1h 5m
2026-07-24 ABL124 PUS → KIX Jul 24, 23:50 UTCJul 25, 00:55 UTC1h 5m
2026-07-24 ABL782 CXR → PUS Jul 24, 21:20 UTCJul 24, 21:50 UTC30m
2026-07-24 ABL781 PUS → CXR Jul 24, 11:15 UTCJul 24, 20:20 UTC9h 5m
2026-07-24 ABL8132 CJU → PUS Jul 24, 09:25 UTCJul 24, 09:45 UTC20m
2026-07-24 ABL8021 GMP → CJU Jul 24, 07:05 UTCJul 24, 07:40 UTC35m
2026-07-24 ABL8028 CJU → GMP Jul 24, 05:15 UTCJul 24, 06:00 UTC45m
2026-07-24 ABL8109 PUS → CJU Jul 24, 03:05 UTCJul 24, 03:25 UTC20m
2026-07-24 ABL8102 CJU → PUS Jul 24, 01:05 UTCJul 24, 01:25 UTC20m
2026-07-23 ABL8105 PUS → CJU Jul 23, 23:00 UTCJul 23, 23:20 UTC20m
2026-07-23 ABL726 BKK → PUS Jul 23, 20:45 UTCJul 23, 21:25 UTC40m
2026-07-23 ABL726 BKK → PUS Jul 23, 16:20 UTCJul 23, 19:40 UTC3h 20m
2026-07-23 ABL725 PUS → BKK Jul 23, 09:15 UTCJul 23, 14:30 UTC5h 15m
2026-07-23 ABL181 CTS → PUS Jul 23, 04:00 UTCJul 23, 06:10 UTC2h 10m
2026-07-23 ABL182 PUS → CTS Jul 23, 00:35 UTCJul 23, 02:35 UTC2h 0m
2026-07-22 ABL602 DPS → PUS Jul 22, 22:35 UTCJul 22, 22:55 UTC20m
2026-07-22 ABL602 DPS → PUS Jul 22, 11:20 UTCJul 22, 21:55 UTC10h 35m
2026-07-22 ABL181 CTS → PUS Jul 22, 04:00 UTCJul 22, 05:25 UTC1h 25m
2026-07-22 ABL182 PUS → CTS Jul 22, 00:20 UTCJul 22, 02:30 UTC2h 10m
2026-07-21 ABL8823 GMP → PUS Jul 21, 10:05 UTCJul 21, 10:45 UTC40m
2026-07-21 ABL8820 PUS → GMP Jul 21, 08:20 UTCJul 21, 09:10 UTC50m
2026-07-21 ABL181 CTS → PUS Jul 21, 03:55 UTCJul 21, 06:00 UTC2h 5m
2026-07-21 ABL182 PUS → CTS Jul 21, 00:35 UTCJul 21, 02:30 UTC1h 55m
2026-07-20 ABL602 DPS → PUS Jul 20, 22:30 UTCJul 20, 22:45 UTC15m
2026-07-20 ABL602 DPS → PUS Jul 20, 09:20 UTCJul 20, 21:35 UTC12h 15m
2026-07-20 ABL601 PUS → DPS Jul 20, 08:15 UTCJul 20, 08:35 UTC20m
2026-07-20 ABL1635 FSZ → PUS Jul 20, 03:20 UTCJul 20, 04:35 UTC1h 15m
2026-07-20 ABL1645 - Jul 20, 00:40 UTCJul 20, 01:55 UTC1h 15m
2026-07-19 ABL726 BKK → PUS Jul 19, 20:55 UTCJul 19, 21:25 UTC30m
2026-07-19 ABL726 BKK → PUS Jul 19, 18:35 UTCJul 19, 19:50 UTC1h 15m
2026-07-19 ABL726 BKK → PUS Jul 19, 16:20 UTCJul 19, 16:35 UTC15m
2026-07-19 ABL725 - Jul 19, 14:00 UTCJul 19, 14:15 UTC15m
2026-07-19 ABL725 - Jul 19, 09:15 UTCJul 19, 11:55 UTC2h 40m
2026-07-19 ABL794 - Jul 19, 07:20 UTCJul 19, 07:40 UTC20m
2026-07-19 ABL794 - Jul 19, 05:50 UTCJul 19, 06:15 UTC25m
2026-07-19 ABL793 PUS → TPE Jul 19, 02:00 UTCJul 19, 03:50 UTC1h 50m
2026-07-18 ABL8803 GMP → PUS Jul 18, 22:35 UTCJul 18, 23:15 UTC40m
2026-07-18 ABL8826 PUS → GMP Jul 18, 11:30 UTCJul 18, 12:05 UTC35m
2026-07-18 ABL8116 CJU → PUS Jul 18, 10:00 UTCJul 18, 10:20 UTC20m

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 HL8394 page for operator, model, and routing details .

Mode-S 71C394 frequently asked

What is Mode-S code 71C394?
71C394 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8394.
Where is Mode-S 71C394 registered?
Mode-S code 71C394 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 71C394 broadcasting right now?
Yes. Mode-S 71C394 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C394, octal 34341624, decimal 7,455,636.
What flights does 71C394 operate?
Mode-S 71C394 has broadcast 20 distinct callsigns, including ABL726, ABL725, ABL602, ABL794, ABL793.