Apparatus

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sensors Mode-S transponder

71C387

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

Currently assigned to HL8387 · BOEING 787-9 Dreamliner

Hex
71C387
Octal
34341607
Decimal
7,455,623
Country
KR
Tail
HL8387
Type
B789
Broadcasting now · callsign APZ112 · 40,000 ft
Flights observed
145
Distinct callsigns
20
Country
KR
Last broadcast
31m ago

Current position

71C387 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C387 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
APZ102 - 27 2026-07-12
APZ101 - 27 2026-07-12
APZ131 - 15 2026-07-09
APZ132 - 13 2026-07-10
APZ112 - 11 2026-07-14
APZ111 - 11 2026-07-13
APZ621 - 8 2026-06-25
APZ602 - 4 2026-06-29
APZ601 - 4 2026-06-29
APZ136 - 4 2026-07-08
APZ104 - 4 2026-06-20
APZ622 Air Premiea 3 2026-06-11
APZ135 - 3 2026-07-08
APZ736 - 2 2026-07-11
APZ735 - 2 2026-07-11
APZ151 Air Premiea 2 2026-06-15
APZ103 - 2 2026-06-19
APZ732 Air Premiea 1 2026-05-16
APZ731 Air Premiea 1 2026-05-16
APZ152 - 1 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 APZ112 - Jul 14, 00:40 UTCJul 14, 09:45 UTC9h 5m
2026-07-13 APZ111 ICN → SFO Jul 13, 10:40 UTCJul 13, 21:20 UTC10h 40m
2026-07-12 APZ102 - Jul 12, 18:05 UTCJul 13, 06:01 UTC11h 55m
2026-07-12 APZ101 ICN → LAX Jul 12, 04:30 UTCJul 12, 15:40 UTC11h 10m
2026-07-11 APZ736 NRT → ICN Jul 11, 09:10 UTCJul 11, 11:05 UTC1h 55m
2026-07-11 APZ735 - Jul 11, 05:10 UTCJul 11, 07:05 UTC1h 55m
2026-07-10 APZ132 - Jul 10, 06:05 UTCJul 10, 20:05 UTC14h 0m
2026-07-09 APZ131 ICN → EWR Jul 9, 13:00 UTCJul 10, 02:25 UTC13h 25m
2026-07-08 APZ136 IAD → ICN Jul 8, 17:50 UTCJul 9, 08:10 UTC14h 20m
2026-07-08 APZ135 ICN → IAD Jul 8, 01:20 UTCJul 8, 14:45 UTC13h 25m
2026-07-06 APZ112 - Jul 6, 23:00 UTCJul 7, 10:40 UTC11h 40m
2026-07-06 APZ111 ICN → SFO Jul 6, 09:15 UTCJul 6, 19:25 UTC10h 10m
2026-07-05 APZ132 - Jul 5, 05:30 UTCJul 5, 19:35 UTC14h 5m
2026-07-04 APZ131 ICN → EWR Jul 4, 12:40 UTCJul 5, 02:00 UTC13h 20m
2026-07-03 APZ102 - Jul 3, 17:55 UTCJul 4, 06:20 UTC12h 25m
2026-07-03 APZ101 - Jul 3, 04:15 UTCJul 3, 14:40 UTC10h 25m
2026-07-01 APZ112 - Jul 1, 23:15 UTCJul 2, 11:10 UTC11h 55m
2026-07-01 APZ111 - Jul 1, 09:15 UTCJul 1, 19:25 UTC10h 10m
2026-06-30 APZ102 - Jun 30, 18:15 UTCJul 1, 06:50 UTC12h 35m
2026-06-30 APZ101 - Jun 30, 04:10 UTCJun 30, 14:25 UTC10h 15m
2026-06-29 APZ602 - Jun 29, 16:04 UTCJun 29, 20:54 UTC4h 50m
2026-06-29 APZ601 ICN → BKK Jun 29, 08:29 UTCJun 29, 13:34 UTC5h 5m
2026-06-26 APZ102 - Jun 26, 18:09 UTCJun 27, 06:44 UTC12h 35m
2026-06-26 APZ101 - Jun 26, 04:14 UTCJun 26, 14:29 UTC10h 15m
2026-06-25 APZ621 ICN → ICN Jun 25, 09:10 UTCJun 25, 19:59 UTC10h 50m
2026-06-24 APZ102 - Jun 24, 17:55 UTCJun 25, 06:25 UTC12h 30m
2026-06-24 APZ101 ICN → LAX Jun 24, 04:20 UTCJun 24, 14:39 UTC10h 20m
2026-06-22 APZ602 - Jun 22, 15:59 UTCJun 22, 20:39 UTC4h 40m
2026-06-22 APZ601 ICN → BKK Jun 22, 08:35 UTCJun 22, 13:35 UTC5h 0m
2026-06-21 APZ102 - Jun 21, 18:04 UTCJun 22, 06:05 UTC12h 0m
2026-06-21 APZ101 - Jun 21, 04:10 UTCJun 21, 14:54 UTC10h 45m
2026-06-20 APZ104 - Jun 20, 06:49 UTCJun 20, 18:29 UTC11h 40m
2026-06-19 APZ103 - Jun 19, 13:14 UTCJun 19, 23:59 UTC10h 45m
2026-06-18 APZ621 ICN → ICN Jun 18, 09:10 UTCJun 18, 20:10 UTC11h 0m
2026-06-17 APZ102 - Jun 17, 18:00 UTCJun 18, 06:05 UTC12h 5m
2026-06-17 APZ101 - Jun 17, 04:10 UTCJun 17, 15:05 UTC10h 55m
2026-06-16 APZ152 - Jun 16, 00:50 UTCJun 16, 09:50 UTC9h 0m
2026-06-15 APZ151 ICN → HNL Jun 15, 21:09 UTCJun 15, 21:25 UTC15m
2026-06-15 APZ151 ICN → HNL Jun 15, 13:45 UTCJun 15, 15:30 UTC1h 45m
2026-06-14 APZ102 - Jun 14, 18:00 UTCJun 15, 06:24 UTC12h 24m
2026-06-14 APZ101 ICN → LAX Jun 14, 04:15 UTCJun 14, 14:15 UTC10h 0m
2026-06-13 APZ132 - Jun 13, 05:45 UTCJun 13, 19:35 UTC13h 50m
2026-06-12 APZ131 ICN → EWR Jun 12, 12:45 UTCJun 13, 02:05 UTC13h 20m
2026-06-11 APZ622 DAD → ICN Jun 11, 09:10 UTCJun 11, 19:45 UTC10h 35m
2026-06-10 APZ102 LAX → ICN Jun 10, 18:15 UTCJun 11, 06:55 UTC12h 40m
2026-06-10 APZ101 ICN → LAX Jun 10, 04:10 UTCJun 10, 14:20 UTC10h 10m
2026-06-09 APZ132 EWR → ICN Jun 9, 05:15 UTCJun 9, 19:55 UTC14h 40m
2026-06-08 APZ131 ICN → EWR Jun 8, 12:35 UTCJun 9, 01:50 UTC13h 15m
2026-06-07 APZ102 LAX → ICN Jun 7, 18:05 UTCJun 8, 06:40 UTC12h 35m
2026-06-07 APZ101 ICN → LAX Jun 7, 04:15 UTCJun 7, 14:25 UTC10h 10m

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 HL8387 page for operator, model, and routing details .

Mode-S 71C387 frequently asked

What is Mode-S code 71C387?
71C387 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8387.
Where is Mode-S 71C387 registered?
Mode-S code 71C387 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 71C387 broadcasting right now?
Yes. Mode-S 71C387 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C387, octal 34341607, decimal 7,455,623.
What flights does 71C387 operate?
Mode-S 71C387 has broadcast 20 distinct callsigns, including APZ102, APZ101, APZ131, APZ132, APZ112.