Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C703

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

Currently assigned to HL8703 · BOEING 787-9 Dreamliner

Hex
71C703
Octal
34343403
Decimal
7,456,515
Country
KR
Tail
HL8703
Type
B789
Broadcasting now · callsign APZ732 · 15,975 ft
Flights observed
277
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 21:15 UTC

Current position

71C703 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C703 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
APZ731 Air Premiea 46 2026-07-26
APZ732 Air Premiea 41 2026-07-26
APZ602 Air Premiea 39 2026-07-26
APZ601 Air Premiea 38 2026-07-26
APZ736 Air Premiea 18 2026-07-24
APZ735 Air Premiea 18 2026-07-24
APZ151 - 16 2026-07-22
APZ152 Air Premiea 12 2026-07-23
APZ801 - 8 2026-06-22
APZ733 - 7 2026-07-14
APZ802 - 6 2026-06-22
APZ734 - 6 2026-07-14
APZ621 Air Premiea 5 2026-05-06
APZ112 Air Premiea 5 2026-07-21
APZ111 Air Premiea 5 2026-07-20
APZ622 Air Premiea 3 2026-05-20
HL8703 - 1 2026-05-26
APZ6022 - 1 2026-06-27
APZ104 Air Premiea 1 2026-07-25
APZ103 Air Premiea 1 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 APZ602 BKK → ICN Jul 26, 16:10 UTCJul 26, 21:10 UTC5h 0m
2026-07-26 APZ601 ICN → BKK Jul 26, 08:30 UTCJul 26, 13:20 UTC4h 50m
2026-07-26 APZ732 NRT → ICN Jul 26, 03:55 UTCJul 26, 05:50 UTC1h 55m
2026-07-26 APZ731 ICN → NRT Jul 26, 00:15 UTCJul 26, 02:00 UTC1h 45m
2026-07-25 APZ104 LAX → ICN Jul 25, 07:00 UTCJul 25, 18:50 UTC11h 50m
2026-07-24 APZ103 ICN → LAX Jul 24, 13:30 UTCJul 25, 00:55 UTC11h 25m
2026-07-24 APZ736 NRT → ICN Jul 24, 09:30 UTCJul 24, 11:20 UTC1h 50m
2026-07-24 APZ735 ICN → NRT Jul 24, 05:55 UTCJul 24, 07:45 UTC1h 50m
2026-07-23 APZ152 HNL → ICN Jul 23, 07:35 UTCJul 23, 09:45 UTC2h 10m
2026-07-23 APZ152 HNL → ICN Jul 23, 00:40 UTCJul 23, 00:50 UTC10m
2026-07-22 APZ151 ICN → HNL Jul 22, 21:50 UTCJul 22, 22:00 UTC10m
2026-07-22 APZ151 - Jul 22, 14:00 UTCJul 22, 15:50 UTC1h 50m
2026-07-22 APZ731 ICN → NRT Jul 22, 00:15 UTCJul 22, 02:05 UTC1h 50m
2026-07-21 APZ112 SFO → ICN Jul 21, 00:20 UTCJul 21, 12:05 UTC11h 45m
2026-07-20 APZ111 ICN → SFO Jul 20, 10:35 UTCJul 20, 21:30 UTC10h 55m
2026-07-20 APZ732 NRT → ICN Jul 20, 04:05 UTCJul 20, 06:00 UTC1h 55m
2026-07-20 APZ731 ICN → NRT Jul 20, 00:05 UTCJul 20, 01:55 UTC1h 50m
2026-07-19 APZ602 BKK → ICN Jul 19, 18:10 UTCJul 19, 21:00 UTC2h 50m
2026-07-19 APZ602 BKK → ICN Jul 19, 16:00 UTCJul 19, 16:15 UTC15m
2026-07-19 APZ601 - Jul 19, 13:05 UTCJul 19, 13:20 UTC15m
2026-07-19 APZ601 - Jul 19, 08:30 UTCJul 19, 11:15 UTC2h 45m
2026-07-19 APZ732 NRT → ICN Jul 19, 03:55 UTCJul 19, 05:45 UTC1h 50m
2026-07-19 APZ731 ICN → NRT Jul 19, 00:15 UTCJul 19, 02:05 UTC1h 50m
2026-07-18 APZ152 - Jul 18, 01:34 UTCJul 18, 10:35 UTC9h 1m
2026-07-17 APZ151 - Jul 17, 13:45 UTCJul 17, 22:00 UTC8h 15m
2026-07-17 APZ152 - Jul 17, 01:09 UTCJul 17, 10:25 UTC9h 15m
2026-07-15 APZ151 - Jul 15, 13:45 UTCJul 15, 22:05 UTC8h 20m
2026-07-15 APZ732 NRT → ICN Jul 15, 04:00 UTCJul 15, 05:50 UTC1h 50m
2026-07-15 APZ731 ICN → NRT Jul 15, 00:15 UTCJul 15, 02:05 UTC1h 50m
2026-07-14 APZ602 - Jul 14, 18:10 UTCJul 14, 21:05 UTC2h 55m
2026-07-14 APZ602 - Jul 14, 16:05 UTCJul 14, 16:15 UTC10m
2026-07-14 APZ601 - Jul 14, 13:05 UTCJul 14, 13:35 UTC30m
2026-07-14 APZ601 - Jul 14, 08:35 UTCJul 14, 11:15 UTC2h 40m
2026-07-14 APZ734 NRT → ICN Jul 14, 04:30 UTCJul 14, 06:25 UTC1h 55m
2026-07-14 APZ733 - Jul 14, 00:45 UTCJul 14, 02:40 UTC1h 55m
2026-07-12 APZ602 - Jul 12, 18:25 UTCJul 12, 21:00 UTC2h 35m
2026-07-12 APZ602 - Jul 12, 16:05 UTCJul 12, 16:15 UTC10m
2026-07-12 APZ601 - Jul 12, 13:15 UTCJul 12, 13:40 UTC25m
2026-07-12 APZ601 - Jul 12, 08:35 UTCJul 12, 11:05 UTC2h 30m
2026-07-11 APZ152 - Jul 11, 00:45 UTCJul 11, 10:00 UTC9h 15m
2026-07-10 APZ151 - Jul 10, 13:45 UTCJul 10, 21:55 UTC8h 10m
2026-07-10 APZ736 NRT → ICN Jul 10, 09:15 UTCJul 10, 11:10 UTC1h 55m
2026-07-10 APZ735 ICN → NRT Jul 10, 05:10 UTCJul 10, 07:10 UTC2h 0m
2026-07-09 APZ736 - Jul 9, 09:00 UTCJul 9, 11:00 UTC2h 0m
2026-07-09 APZ735 ICN → NRT Jul 9, 05:20 UTCJul 9, 07:20 UTC2h 0m
2026-07-06 APZ732 NRT → ICN Jul 6, 04:05 UTCJul 6, 06:15 UTC2h 10m
2026-07-06 APZ731 - Jul 6, 00:40 UTCJul 6, 02:30 UTC1h 50m
2026-07-05 APZ602 - Jul 5, 16:05 UTCJul 5, 20:55 UTC4h 50m
2026-07-05 APZ601 - Jul 5, 08:40 UTCJul 5, 13:40 UTC5h 0m
2026-07-05 APZ732 NRT → ICN Jul 5, 04:10 UTCJul 5, 06:15 UTC2h 5m

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 HL8703 page for operator, model, and routing details .

Mode-S 71C703 frequently asked

What is Mode-S code 71C703?
71C703 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8703.
Where is Mode-S 71C703 registered?
Mode-S code 71C703 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 71C703 broadcasting right now?
Yes. Mode-S 71C703 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C703, octal 34343403, decimal 7,456,515.
What flights does 71C703 operate?
Mode-S 71C703 has broadcast 20 distinct callsigns, including APZ731, APZ732, APZ602, APZ601, APZ736.