Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C704

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

Currently assigned to HL8704 · BOEING 787-9 Dreamliner

Hex
71C704
Octal
34343404
Decimal
7,456,516
Country
KR
Tail
HL8704
Type
B789
No current signal · last broadcast Jul 26, 19:35 UTC
Flights observed
201
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 19:35 UTC

Last known position

Most recent position reported by Mode-S 71C704.

Country allocation

The ICAO 24-bit address 71C704 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
APZ801 Air Premiea 37 2026-07-24
APZ802 Air Premiea 27 2026-07-24
APZ152 Air Premiea 16 2026-07-25
APZ151 Air Premiea 15 2026-07-24
APZ104 - 14 2026-07-16
APZ103 - 14 2026-07-15
APZ111 - 9 2026-07-10
APZ131 Air Premiea 8 2026-07-25
APZ112 - 8 2026-07-11
APZ731 Air Premiea 7 2026-07-18
APZ601 - 7 2026-07-17
APZ132 Air Premiea 7 2026-07-26
APZ732 - 6 2026-07-18
APZ736 - 5 2026-06-26
APZ735 - 5 2026-06-26
APZ602 Air Premiea 5 2026-07-17
APZ136 Air Premiea 2 2026-05-15
APZ135 Air Premiea 2 2026-05-15
APZ102 Air Premiea 2 2026-07-22
APZ101 Air Premiea 2 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 APZ132 EWR → ICN Jul 26, 05:10 UTCJul 26, 19:35 UTC14h 26m
2026-07-25 APZ131 ICN → EWR Jul 25, 12:45 UTCJul 26, 01:55 UTC13h 10m
2026-07-25 APZ152 HNL → ICN Jul 25, 00:45 UTCJul 25, 09:55 UTC9h 10m
2026-07-24 APZ151 ICN → HNL Jul 24, 13:50 UTCJul 24, 21:55 UTC8h 5m
2026-07-24 APZ802 HKG → ICN Jul 24, 05:50 UTCJul 24, 08:55 UTC3h 5m
2026-07-24 APZ801 ICN → HKG Jul 24, 01:00 UTCJul 24, 04:05 UTC3h 5m
2026-07-22 APZ102 LAX → ICN Jul 22, 18:10 UTCJul 23, 05:55 UTC11h 45m
2026-07-22 APZ101 ICN → LAX Jul 22, 04:20 UTCJul 22, 15:40 UTC11h 20m
2026-07-21 APZ132 EWR → ICN Jul 21, 05:35 UTCJul 21, 20:00 UTC14h 25m
2026-07-20 APZ131 - Jul 20, 14:00 UTCJul 21, 02:40 UTC12h 39m
2026-07-20 APZ131 - Jul 20, 12:50 UTCJul 20, 13:15 UTC25m
2026-07-18 APZ732 NRT → ICN Jul 18, 03:50 UTCJul 18, 05:40 UTC1h 50m
2026-07-18 APZ731 ICN → NRT Jul 18, 00:10 UTCJul 18, 02:00 UTC1h 50m
2026-07-17 APZ602 BKK → ICN Jul 17, 18:25 UTCJul 17, 21:30 UTC3h 5m
2026-07-17 APZ602 BKK → ICN Jul 17, 16:10 UTCJul 17, 16:24 UTC15m
2026-07-17 APZ601 - Jul 17, 13:05 UTCJul 17, 13:20 UTC15m
2026-07-17 APZ601 - Jul 17, 10:05 UTCJul 17, 11:00 UTC55m
2026-07-17 APZ601 - Jul 17, 08:30 UTCJul 17, 09:15 UTC45m
2026-07-17 APZ732 NRT → ICN Jul 17, 03:50 UTCJul 17, 05:45 UTC1h 55m
2026-07-17 APZ731 ICN → NRT Jul 17, 00:04 UTCJul 17, 01:59 UTC1h 55m
2026-07-16 APZ104 - Jul 16, 06:45 UTCJul 16, 18:34 UTC11h 50m
2026-07-15 APZ103 - Jul 15, 13:25 UTCJul 16, 00:30 UTC11h 5m
2026-07-15 APZ802 HKG → ICN Jul 15, 06:25 UTCJul 15, 09:35 UTC3h 10m
2026-07-15 APZ801 ICN → HKG Jul 15, 01:00 UTCJul 15, 04:00 UTC3h 0m
2026-07-14 APZ104 - Jul 14, 06:50 UTCJul 14, 18:30 UTC11h 40m
2026-07-13 APZ103 - Jul 13, 13:25 UTCJul 14, 00:40 UTC11h 15m
2026-07-13 APZ732 NRT → ICN Jul 13, 03:50 UTCJul 13, 05:45 UTC1h 55m
2026-07-13 APZ731 - Jul 13, 00:10 UTCJul 13, 02:05 UTC1h 55m
2026-07-12 APZ622 - Jul 12, 09:10 UTCJul 12, 20:01 UTC10h 50m
2026-07-12 APZ732 NRT → ICN Jul 12, 04:01 UTCJul 12, 05:55 UTC1h 55m
2026-07-12 APZ731 ICN → NRT Jul 12, 00:15 UTCJul 12, 02:05 UTC1h 50m
2026-07-11 APZ112 - Jul 11, 00:20 UTCJul 11, 11:45 UTC11h 25m
2026-07-10 APZ111 ICN → SFO Jul 10, 10:35 UTCJul 10, 21:45 UTC11h 11m
2026-07-09 APZ152 - Jul 9, 00:45 UTCJul 9, 10:10 UTC9h 25m
2026-07-08 APZ151 - Jul 8, 13:50 UTCJul 8, 22:00 UTC8h 10m
2026-07-08 APZ732 - Jul 8, 03:55 UTCJul 8, 05:50 UTC1h 55m
2026-07-08 APZ731 ICN → NRT Jul 8, 00:15 UTCJul 8, 02:05 UTC1h 50m
2026-07-07 APZ132 EWR → ICN Jul 7, 05:25 UTCJul 7, 19:25 UTC14h 0m
2026-07-06 APZ131 ICN → EWR Jul 6, 12:55 UTCJul 7, 02:20 UTC13h 25m
2026-07-05 APZ621 ICN → ICN Jul 5, 09:15 UTCJul 5, 20:05 UTC10h 50m
2026-07-03 APZ112 SFO → ICN Jul 3, 22:55 UTCJul 4, 10:35 UTC11h 40m
2026-07-03 APZ111 - Jul 3, 09:15 UTCJul 3, 19:15 UTC10h 0m
2026-07-03 APZ732 NRT → ICN Jul 3, 03:50 UTCJul 3, 05:55 UTC2h 5m
2026-07-03 APZ731 - Jul 3, 00:05 UTCJul 3, 02:00 UTC1h 55m
2026-07-02 APZ152 - Jul 2, 00:35 UTCJul 2, 10:05 UTC9h 30m
2026-07-01 APZ151 - Jul 1, 21:50 UTCJul 1, 22:00 UTC10m
2026-07-01 APZ151 - Jul 1, 13:55 UTCJul 1, 15:35 UTC1h 40m
2026-07-01 APZ802 - Jul 1, 06:05 UTCJul 1, 09:10 UTC3h 5m
2026-07-01 APZ801 - Jul 1, 03:30 UTCJul 1, 04:00 UTC30m
2026-07-01 APZ801 - Jul 1, 00:50 UTCJul 1, 02:55 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 HL8704 page for operator, model, and routing details .

Mode-S 71C704 frequently asked

What is Mode-S code 71C704?
71C704 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8704.
Where is Mode-S 71C704 registered?
Mode-S code 71C704 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 71C704 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C704, octal 34343404, decimal 7,456,516.
What flights does 71C704 operate?
Mode-S 71C704 has broadcast 20 distinct callsigns, including APZ801, APZ802, APZ152, APZ151, APZ104.