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
No current signal · last broadcast 3h ago
Flights observed
153
Distinct callsigns
17
Country
KR
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 71C703.

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 17 distinct

Callsign Airline Flights Last seen
APZ731 Air Premiea 27 2026-05-25
APZ602 Air Premiea 25 2026-05-25
APZ732 Air Premiea 23 2026-05-25
APZ601 Air Premiea 23 2026-05-25
APZ735 Air Premiea 10 2026-05-29
APZ736 Air Premiea 9 2026-05-29
APZ151 Air Premiea 6 2026-05-29
APZ621 Air Premiea 5 2026-05-06
APZ801 Air Premiea 4 2026-04-27
APZ733 Air Premiea 4 2026-05-19
APZ802 Air Premiea 3 2026-04-27
APZ734 Air Premiea 3 2026-05-19
APZ622 Air Premiea 3 2026-05-20
APZ152 Air Premiea 3 2026-05-23
APZ112 Air Premiea 2 2026-05-15
APZ111 Air Premiea 2 2026-05-15
HL8703 - 1 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 APZ151 ICN → HNL May 29, 21:35 UTCMay 29, 21:45 UTC10m
2026-05-29 APZ151 ICN → HNL May 29, 13:45 UTCMay 29, 15:20 UTC1h 35m
2026-05-29 APZ736 NRT → ICN May 29, 09:40 UTCMay 29, 11:45 UTC2h 5m
2026-05-29 APZ735 ICN → NRT May 29, 06:15 UTCMay 29, 08:00 UTC1h 45m
2026-05-28 APZ736 NRT → ICN May 28, 09:05 UTCMay 28, 11:10 UTC2h 5m
2026-05-28 APZ735 ICN → NRT May 28, 05:00 UTCMay 28, 07:15 UTC2h 15m
2026-05-27 APZ736 NRT → ICN May 27, 09:10 UTCMay 27, 11:05 UTC1h 55m
2026-05-27 APZ735 ICN → NRT May 27, 05:04 UTCMay 27, 07:00 UTC1h 56m
2026-05-26 APZ736 NRT → ICN May 26, 09:09 UTCMay 26, 11:09 UTC2h 0m
2026-05-26 APZ735 ICN → NRT May 26, 05:10 UTCMay 26, 07:05 UTC1h 55m
2026-05-26 HL8703 ICN → ICN May 26, 02:35 UTCMay 26, 02:44 UTC10m
2026-05-25 APZ602 BKK → ICN May 25, 17:20 UTCMay 25, 22:15 UTC4h 54m
2026-05-25 APZ601 ICN → BKK May 25, 08:35 UTCMay 25, 13:30 UTC4h 55m
2026-05-25 APZ732 NRT → ICN May 25, 03:55 UTCMay 25, 05:55 UTC2h 0m
2026-05-25 APZ731 ICN → NRT May 25, 01:55 UTCMay 25, 02:10 UTC15m
2026-05-24 APZ732 NRT → ICN May 24, 03:50 UTCMay 24, 05:50 UTC2h 0m
2026-05-24 APZ731 ICN → NRT May 24, 00:10 UTCMay 24, 01:55 UTC1h 45m
2026-05-23 APZ152 HNL → ICN May 23, 07:50 UTCMay 23, 10:15 UTC2h 25m
2026-05-23 APZ152 HNL → ICN May 23, 01:00 UTCMay 23, 01:15 UTC15m
2026-05-22 APZ151 ICN → HNL May 22, 21:40 UTCMay 22, 22:00 UTC20m
2026-05-22 APZ151 ICN → HNL May 22, 13:50 UTCMay 22, 15:40 UTC1h 50m
2026-05-22 APZ736 NRT → ICN May 22, 09:20 UTCMay 22, 11:05 UTC1h 45m
2026-05-22 APZ735 ICN → NRT May 22, 05:05 UTCMay 22, 07:20 UTC2h 15m
2026-05-21 APZ602 BKK → ICN May 21, 17:50 UTCMay 21, 22:45 UTC4h 55m
2026-05-21 APZ601 ICN → BKK May 21, 08:45 UTCMay 21, 13:35 UTC4h 50m
2026-05-21 APZ732 NRT → ICN May 21, 04:00 UTCMay 21, 06:15 UTC2h 15m
2026-05-21 APZ731 ICN → NRT May 21, 00:15 UTCMay 21, 02:10 UTC1h 55m
2026-05-20 APZ622 DAD → ICN May 20, 09:15 UTCMay 20, 20:00 UTC10h 45m
2026-05-20 APZ732 NRT → ICN May 20, 03:55 UTCMay 20, 06:00 UTC2h 6m
2026-05-20 APZ731 ICN → NRT May 20, 00:15 UTCMay 20, 02:00 UTC1h 45m
2026-05-19 APZ602 BKK → ICN May 19, 16:05 UTCMay 19, 20:55 UTC4h 50m
2026-05-19 APZ601 ICN → BKK May 19, 08:35 UTCMay 19, 13:40 UTC5h 5m
2026-05-19 APZ734 NRT → ICN May 19, 04:30 UTCMay 19, 06:25 UTC1h 55m
2026-05-19 APZ733 ICN → NRT May 19, 00:50 UTCMay 19, 02:45 UTC1h 55m
2026-05-18 APZ602 BKK → ICN May 18, 16:05 UTCMay 18, 21:00 UTC4h 54m
2026-05-18 APZ601 ICN → BKK May 18, 08:55 UTCMay 18, 13:55 UTC5h 0m
2026-05-18 APZ732 NRT → ICN May 18, 03:45 UTCMay 18, 05:35 UTC1h 50m
2026-05-18 APZ731 ICN → NRT May 18, 00:15 UTCMay 18, 02:05 UTC1h 50m
2026-05-17 APZ736 NRT → ICN May 17, 09:15 UTCMay 17, 10:55 UTC1h 40m
2026-05-17 APZ735 ICN → NRT May 17, 05:05 UTCMay 17, 07:05 UTC2h 0m
2026-05-15 APZ112 SFO → ICN May 15, 22:55 UTCMay 16, 10:50 UTC11h 56m
2026-05-15 APZ111 ICN → SFO May 15, 09:10 UTCMay 15, 19:30 UTC10h 19m
2026-05-15 APZ732 NRT → ICN May 15, 03:55 UTCMay 15, 05:40 UTC1h 45m
2026-05-15 APZ731 ICN → NRT May 15, 00:10 UTCMay 15, 02:25 UTC2h 15m
2026-05-13 APZ112 SFO → ICN May 13, 22:50 UTCMay 14, 10:20 UTC11h 30m
2026-05-13 APZ111 ICN → SFO May 13, 09:15 UTCMay 13, 19:15 UTC10h 0m
2026-05-13 APZ732 NRT → ICN May 13, 04:00 UTCMay 13, 05:45 UTC1h 45m
2026-05-13 APZ731 ICN → NRT May 13, 00:05 UTCMay 13, 02:00 UTC1h 55m
2026-05-12 APZ602 BKK → ICN May 12, 16:15 UTCMay 12, 20:55 UTC4h 40m
2026-05-12 APZ601 ICN → BKK May 12, 08:35 UTCMay 12, 13:35 UTC5h 0m

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?
No active broadcast right now. Last signal was 3h ago.
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 17 distinct callsigns, including APZ731, APZ602, APZ732, APZ601, APZ735.