Apparatus

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sensors Mode-S transponder

71C707

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

Currently assigned to HL8707 · BOEING 777-300ER

Hex
71C707
Octal
34343407
Decimal
7,456,519
Country
KR
Tail
HL8707
Type
B77W
No current signal · last broadcast 45m ago
Flights observed
127
Distinct callsigns
2
Country
KR
Last broadcast
45m ago

Last known position

Most recent position reported by Mode-S 71C707.

Country allocation

The ICAO 24-bit address 71C707 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 2 distinct

Callsign Airline Flights Last seen
TWB406 - 65 2026-07-12
TWB405 Tway Airlines 62 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 TWB405 ICN → FCO Jul 18, 04:20 UTCJul 18, 05:45 UTC1h 25m
2026-07-12 TWB406 - Jul 12, 05:55 UTCJul 12, 06:20 UTC25m
2026-07-11 TWB406 - Jul 11, 19:50 UTCJul 12, 05:05 UTC9h 15m
2026-07-11 TWB405 - Jul 11, 05:10 UTCJul 11, 16:20 UTC11h 10m
2026-07-11 TWB405 - Jul 11, 04:05 UTCJul 11, 04:20 UTC15m
2026-07-08 TWB406 - Jul 8, 05:45 UTCJul 8, 06:10 UTC25m
2026-07-07 TWB406 - Jul 7, 19:30 UTCJul 8, 04:55 UTC9h 25m
2026-07-07 TWB405 - Jul 7, 05:30 UTCJul 7, 16:45 UTC11h 15m
2026-07-07 TWB405 - Jul 7, 04:10 UTCJul 7, 04:30 UTC20m
2026-07-05 TWB406 - Jul 5, 06:00 UTCJul 5, 06:25 UTC25m
2026-07-04 TWB406 - Jul 4, 19:45 UTCJul 5, 05:10 UTC9h 25m
2026-07-04 TWB405 ICN → FCO Jul 4, 04:10 UTCJul 4, 16:25 UTC12h 15m
2026-07-03 TWB406 - Jul 3, 06:05 UTCJul 3, 06:35 UTC30m
2026-07-02 TWB406 - Jul 2, 19:40 UTCJul 3, 05:15 UTC9h 35m
2026-07-02 TWB405 - Jul 2, 12:35 UTCJul 2, 16:35 UTC4h 0m
2026-07-02 TWB405 - Jul 2, 04:20 UTCJul 2, 04:35 UTC15m
2026-06-30 TWB406 - Jun 30, 19:35 UTCJul 1, 06:35 UTC11h 0m
2026-06-30 TWB405 - Jun 30, 05:25 UTCJun 30, 16:35 UTC11h 10m
2026-06-30 TWB405 - Jun 30, 04:15 UTCJun 30, 04:30 UTC15m
2026-06-28 TWB406 - Jun 28, 05:55 UTCJun 28, 06:30 UTC35m
2026-06-27 TWB406 - Jun 27, 19:34 UTCJun 28, 05:09 UTC9h 35m
2026-06-27 TWB405 - Jun 27, 05:44 UTCJun 27, 06:09 UTC25m
2026-06-27 TWB405 - Jun 27, 04:34 UTCJun 27, 04:49 UTC15m
2026-06-26 TWB406 - Jun 26, 06:15 UTCJun 26, 06:39 UTC25m
2026-06-25 TWB406 - Jun 25, 19:44 UTCJun 26, 05:24 UTC9h 40m
2026-06-25 TWB405 - Jun 25, 05:39 UTCJun 25, 16:55 UTC11h 15m
2026-06-25 TWB405 - Jun 25, 04:20 UTCJun 25, 04:35 UTC15m
2026-06-24 TWB406 - Jun 24, 05:59 UTCJun 24, 06:29 UTC30m
2026-06-23 TWB406 - Jun 23, 19:39 UTCJun 24, 05:09 UTC9h 30m
2026-06-23 TWB405 ICN → FCO Jun 23, 04:14 UTCJun 23, 16:44 UTC12h 30m
2026-06-21 TWB406 - Jun 21, 05:40 UTCJun 21, 06:04 UTC25m
2026-06-20 TWB406 - Jun 20, 19:29 UTCJun 21, 04:49 UTC9h 20m
2026-06-20 TWB405 ICN → FCO Jun 20, 04:39 UTCJun 20, 17:10 UTC12h 30m
2026-06-18 TWB406 - Jun 18, 19:45 UTCJun 19, 06:44 UTC10h 59m
2026-06-18 TWB405 - Jun 18, 12:25 UTCJun 18, 16:25 UTC4h 0m
2026-06-18 TWB405 - Jun 18, 04:10 UTCJun 18, 04:20 UTC10m
2026-06-17 TWB406 - Jun 17, 06:05 UTCJun 17, 06:35 UTC30m
2026-06-16 TWB406 - Jun 16, 19:45 UTCJun 16, 23:00 UTC3h 16m
2026-06-16 TWB405 - Jun 16, 12:39 UTCJun 16, 16:45 UTC4h 5m
2026-06-16 TWB405 - Jun 16, 04:15 UTCJun 16, 04:30 UTC15m
2026-06-13 TWB406 - Jun 13, 19:40 UTCJun 14, 06:45 UTC11h 5m
2026-06-13 TWB405 ICN → FCO Jun 13, 04:00 UTCJun 13, 16:30 UTC12h 30m
2026-06-12 TWB406 - Jun 12, 06:20 UTCJun 12, 06:40 UTC20m
2026-06-11 TWB406 - Jun 11, 19:40 UTCJun 12, 05:35 UTC9h 55m
2026-06-11 TWB405 ICN → FCO Jun 11, 05:20 UTCJun 11, 14:05 UTC8h 45m
2026-06-11 TWB405 ICN → FCO Jun 11, 04:05 UTCJun 11, 04:20 UTC15m
2026-06-10 TWB406 FCO → ICN Jun 10, 05:55 UTCJun 10, 06:20 UTC25m
2026-06-09 TWB406 FCO → ICN Jun 9, 19:35 UTCJun 10, 05:10 UTC9h 35m
2026-06-09 TWB405 ICN → FCO Jun 9, 04:05 UTCJun 9, 15:50 UTC11h 45m
2026-06-07 TWB406 FCO → ICN Jun 7, 05:50 UTCJun 7, 06:20 UTC30m

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 HL8707 page for operator, model, and routing details .

Mode-S 71C707 frequently asked

What is Mode-S code 71C707?
71C707 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8707.
Where is Mode-S 71C707 registered?
Mode-S code 71C707 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 71C707 broadcasting right now?
No active broadcast right now. Last signal was 45m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C707, octal 34343407, decimal 7,456,519.
What flights does 71C707 operate?
Mode-S 71C707 has broadcast 2 distinct callsigns, including TWB406, TWB405.