Apparatus

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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 APZ733 · 36,975 ft
Flights observed
242
Distinct callsigns
18
Country
KR
Last broadcast
1d ago

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 18 distinct

Callsign Airline Flights Last seen
APZ731 - 41 2026-07-06
APZ732 - 37 2026-07-06
APZ602 - 34 2026-07-12
APZ601 - 33 2026-07-12
APZ736 - 17 2026-07-10
APZ735 - 17 2026-07-10
APZ151 - 12 2026-07-10
APZ801 - 8 2026-06-22
APZ152 - 8 2026-07-11
APZ802 - 6 2026-06-22
APZ733 Air Premiea 6 2026-06-23
APZ734 Air Premiea 5 2026-06-23
APZ621 Air Premiea 5 2026-05-06
APZ112 Air Premiea 4 2026-06-08
APZ111 Air Premiea 4 2026-06-08
APZ622 Air Premiea 3 2026-05-20
HL8703 - 1 2026-05-26
APZ6022 - 1 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-07-05 APZ731 ICN → NRT Jul 5, 00:45 UTCJul 5, 02:30 UTC1h 45m
2026-07-04 APZ152 - Jul 4, 00:55 UTCJul 4, 10:25 UTC9h 30m
2026-07-03 APZ151 - Jul 3, 13:55 UTCJul 3, 15:35 UTC1h 40m
2026-07-03 APZ736 NRT → ICN Jul 3, 09:15 UTCJul 3, 11:10 UTC1h 55m
2026-07-03 APZ735 - Jul 3, 05:10 UTCJul 3, 07:15 UTC2h 5m
2026-07-02 APZ602 - Jul 2, 16:10 UTCJul 2, 21:15 UTC5h 5m
2026-07-02 APZ601 - Jul 2, 08:40 UTCJul 2, 13:55 UTC5h 15m
2026-07-02 APZ732 NRT → ICN Jul 2, 04:05 UTCJul 2, 06:15 UTC2h 10m
2026-07-02 APZ731 ICN → NRT Jul 2, 00:25 UTCJul 2, 02:05 UTC1h 40m
2026-06-27 APZ6022 - Jun 27, 02:55 UTCJun 27, 07:59 UTC5h 5m
2026-06-25 APZ601 - Jun 25, 08:45 UTCJun 25, 14:14 UTC5h 30m
2026-06-25 APZ732 NRT → ICN Jun 25, 03:54 UTCJun 25, 06:05 UTC2h 10m
2026-06-25 APZ731 - Jun 25, 00:05 UTCJun 25, 01:50 UTC1h 45m
2026-06-24 APZ732 NRT → ICN Jun 24, 04:00 UTCJun 24, 05:59 UTC2h 0m
2026-06-24 APZ731 ICN → NRT Jun 24, 00:09 UTCJun 24, 02:05 UTC1h 55m
2026-06-23 APZ602 - Jun 23, 16:09 UTCJun 23, 20:59 UTC4h 50m
2026-06-23 APZ601 ICN → BKK Jun 23, 08:39 UTCJun 23, 13:34 UTC4h 55m
2026-06-23 APZ734 NRT → ICN Jun 23, 04:39 UTCJun 23, 06:44 UTC2h 5m
2026-06-23 APZ733 ICN → NRT Jun 23, 01:10 UTCJun 23, 03:04 UTC1h 55m
2026-06-22 APZ802 HKG → ICN Jun 22, 06:05 UTCJun 22, 09:04 UTC3h 0m
2026-06-22 APZ801 - Jun 22, 03:35 UTCJun 22, 03:50 UTC15m
2026-06-22 APZ801 - Jun 22, 00:50 UTCJun 22, 02:54 UTC2h 5m
2026-06-20 APZ732 - Jun 20, 03:54 UTCJun 20, 04:44 UTC50m
2026-06-20 APZ731 ICN → NRT Jun 20, 00:14 UTCJun 20, 02:00 UTC1h 45m
2026-06-19 APZ602 - Jun 19, 16:39 UTCJun 19, 21:30 UTC4h 50m
2026-06-19 APZ601 ICN → BKK Jun 19, 08:34 UTCJun 19, 13:54 UTC5h 20m
2026-06-19 APZ732 NRT → ICN Jun 19, 04:04 UTCJun 19, 05:59 UTC1h 55m
2026-06-19 APZ731 ICN → NRT Jun 19, 00:24 UTCJun 19, 02:09 UTC1h 45m
2026-06-18 APZ736 NRT → ICN Jun 18, 09:05 UTCJun 18, 11:10 UTC2h 5m
2026-06-18 APZ735 - Jun 18, 05:20 UTCJun 18, 07:20 UTC2h 0m
2026-06-17 APZ802 - Jun 17, 09:10 UTCJun 17, 09:45 UTC35m
2026-06-17 APZ802 - Jun 17, 06:35 UTCJun 17, 07:55 UTC1h 20m
2026-06-17 APZ801 - Jun 17, 03:35 UTCJun 17, 03:45 UTC10m
2026-06-17 APZ801 - Jun 17, 00:45 UTCJun 17, 02:55 UTC2h 10m
2026-06-16 APZ602 BKK → ICN Jun 16, 16:10 UTCJun 16, 21:10 UTC5h 1m

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 18 distinct callsigns, including APZ731, APZ732, APZ602, APZ601, APZ736.