Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
Transponder active on ground
Flights observed
362
Distinct callsigns
20
Country
KR
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 71C394.

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 - 35 2026-07-13
ABL725 - 33 2026-07-13
ABL602 - 23 2026-07-10
ABL601 - 19 2026-07-10
ABL794 - 18 2026-07-13
ABL793 - 18 2026-07-13
ABL8826 - 12 2026-07-11
ABL8803 - 12 2026-07-11
ABL337 - 10 2026-07-11
ABL8812 - 9 2026-07-12
ABL773 - 9 2026-07-05
ABL382 - 9 2026-07-07
ABL1635 - 9 2026-07-08
ABL8823 - 8 2026-07-11
ABL8820 - 8 2026-07-11
ABL8819 - 8 2026-07-12
ABL381 - 6 2026-07-07
ABL371 - 6 2026-07-07
ABL7315 Air Busan 5 2026-05-05
ABL372 - 5 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ABL791 PUS → TPE Jul 14, 05:45 UTCJul 14, 07:50 UTC2h 5m
2026-07-14 ABL111 - Jul 14, 02:20 UTCJul 14, 04:00 UTC1h 40m
2026-07-13 ABL112 PUS → NRT Jul 13, 23:05 UTCJul 14, 00:50 UTC1h 45m
2026-07-13 ABL726 - Jul 13, 20:50 UTCJul 13, 21:25 UTC35m
2026-07-13 ABL726 - Jul 13, 18:40 UTCJul 13, 19:50 UTC1h 10m
2026-07-13 ABL726 - Jul 13, 16:20 UTCJul 13, 16:30 UTC10m
2026-07-13 ABL725 - Jul 13, 13:50 UTCJul 13, 14:05 UTC15m
2026-07-13 ABL725 - Jul 13, 10:35 UTCJul 13, 11:45 UTC1h 10m
2026-07-13 ABL725 - Jul 13, 09:10 UTCJul 13, 09:30 UTC20m
2026-07-13 ABL794 - Jul 13, 07:15 UTCJul 13, 07:35 UTC20m
2026-07-13 ABL794 - Jul 13, 05:45 UTCJul 13, 06:10 UTC25m
2026-07-13 ABL793 PUS → TPE Jul 13, 02:10 UTCJul 13, 04:10 UTC2h 0m
2026-07-12 ABL8116 - Jul 12, 10:45 UTCJul 12, 11:05 UTC20m
2026-07-12 ABL8117 - Jul 12, 08:30 UTCJul 12, 08:50 UTC20m
2026-07-12 ABL8819 - Jul 12, 06:45 UTCJul 12, 07:25 UTC40m
2026-07-12 ABL8812 PUS → GMP Jul 12, 05:01 UTCJul 12, 05:45 UTC45m
2026-07-12 ABL141 - Jul 12, 03:05 UTCJul 12, 03:40 UTC35m
2026-07-12 ABL142 - Jul 12, 01:10 UTCJul 12, 01:25 UTC15m
2026-07-11 ABL8803 GMP → PUS Jul 11, 22:45 UTCJul 11, 23:30 UTC45m
2026-07-11 ABL8826 PUS → GMP Jul 11, 11:35 UTCJul 11, 12:10 UTC35m
2026-07-11 ABL8823 GMP → PUS Jul 11, 09:50 UTCJul 11, 10:35 UTC45m
2026-07-11 ABL8820 PUS → GMP Jul 11, 08:20 UTCJul 11, 09:00 UTC40m
2026-07-11 ABL337 PUS → PUS Jul 11, 01:05 UTCJul 11, 06:55 UTC5h 50m
2026-07-10 ABL602 - Jul 10, 23:10 UTCJul 10, 23:25 UTC15m
2026-07-10 ABL601 - Jul 10, 09:20 UTCJul 10, 22:00 UTC12h 40m
2026-07-10 ABL794 TPE → PUS Jul 10, 05:50 UTCJul 10, 07:45 UTC1h 55m
2026-07-10 ABL793 PUS → TPE Jul 10, 02:35 UTCJul 10, 04:45 UTC2h 10m
2026-07-09 ABL712 - Jul 9, 21:05 UTCJul 9, 21:35 UTC30m
2026-07-09 ABL711 - Jul 9, 12:30 UTCJul 9, 20:00 UTC7h 30m
2026-07-09 ABL337 PUS → PUS Jul 9, 00:55 UTCJul 9, 07:20 UTC6h 25m
2026-07-08 ABL602 - Jul 8, 22:30 UTCJul 8, 22:50 UTC20m
2026-07-08 ABL601 - Jul 8, 08:20 UTCJul 8, 21:40 UTC13h 20m
2026-07-08 ABL1635 - Jul 8, 03:00 UTCJul 8, 04:25 UTC1h 25m
2026-07-08 ABL1645 - Jul 8, 00:15 UTCJul 8, 01:25 UTC1h 10m
2026-07-07 ABL382 - Jul 7, 20:30 UTCJul 7, 21:10 UTC40m
2026-07-07 ABL382 - Jul 7, 18:15 UTCJul 7, 19:35 UTC1h 20m
2026-07-07 ABL381 - Jul 7, 13:00 UTCJul 7, 15:55 UTC2h 55m
2026-07-07 ABL1315 - Jul 7, 10:50 UTCJul 7, 11:50 UTC1h 0m
2026-07-07 ABL1325 - Jul 7, 08:45 UTCJul 7, 09:45 UTC1h 0m
2026-07-07 ABL372 - Jul 7, 06:45 UTCJul 7, 07:20 UTC35m
2026-07-07 ABL371 - Jul 7, 00:10 UTCJul 7, 00:35 UTC25m
2026-07-06 ABL726 - Jul 6, 20:50 UTCJul 6, 21:25 UTC35m
2026-07-06 ABL726 - Jul 6, 16:25 UTCJul 6, 19:50 UTC3h 25m
2026-07-06 ABL725 PUS → BKK Jul 6, 09:15 UTCJul 6, 14:20 UTC5h 5m
2026-07-06 ABL794 - Jul 6, 07:15 UTCJul 6, 07:40 UTC25m
2026-07-06 ABL794 - Jul 6, 05:45 UTCJul 6, 06:10 UTC25m
2026-07-06 ABL793 PUS → TPE Jul 6, 02:00 UTCJul 6, 03:55 UTC1h 55m
2026-07-05 ABL773 PUS → PUS Jul 5, 12:05 UTCJul 5, 21:45 UTC9h 40m
2026-07-05 ABL794 - Jul 5, 07:20 UTCJul 5, 07:40 UTC20m
2026-07-05 ABL794 - Jul 5, 05:55 UTCJul 5, 06:20 UTC25m

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?
Mode-S 71C394 is currently broadcasting from the ground.
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, ABL601, ABL794.