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
Broadcasting now · callsign TWB406 · 33,000 ft
Flights observed
71
Distinct callsigns
2
Country
KR
Last broadcast
32m ago

Current position

71C707 is currently broadcasting. Map zoomed to live position.

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 Tway Airlines 36 2026-06-02
TWB405 Tway Airlines 35 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 TWB406 FCO → ICN Jun 2, 19:35 UTCJun 2, 19:45 UTC10m
2026-06-02 TWB405 ICN → FCO Jun 2, 13:10 UTCJun 2, 17:05 UTC3h 55m
2026-06-02 TWB405 ICN → FCO Jun 2, 04:20 UTCJun 2, 04:35 UTC15m
2026-05-30 TWB406 FCO → ICN May 30, 19:40 UTCMay 30, 22:55 UTC3h 15m
2026-05-30 TWB405 ICN → FCO May 30, 05:25 UTCMay 30, 17:05 UTC11h 40m
2026-05-30 TWB405 ICN → FCO May 30, 04:10 UTCMay 30, 04:25 UTC15m
2026-05-29 TWB406 FCO → ICN May 29, 05:45 UTCMay 29, 06:05 UTC20m
2026-05-28 TWB406 FCO → ICN May 28, 19:30 UTCMay 29, 05:00 UTC9h 30m
2026-05-28 TWB405 ICN → FCO May 28, 05:35 UTCMay 28, 17:20 UTC11h 45m
2026-05-28 TWB405 ICN → FCO May 28, 04:15 UTCMay 28, 04:30 UTC15m
2026-05-27 TWB406 FCO → ICN May 27, 05:59 UTCMay 27, 06:29 UTC30m
2026-05-26 TWB406 FCO → ICN May 26, 19:30 UTCMay 27, 05:14 UTC9h 45m
2026-05-26 TWB405 ICN → FCO May 26, 04:30 UTCMay 26, 16:50 UTC12h 20m
2026-05-24 TWB406 FCO → ICN May 24, 06:10 UTCMay 24, 06:40 UTC30m
2026-05-23 TWB406 FCO → ICN May 23, 19:35 UTCMay 23, 21:25 UTC1h 50m
2026-05-23 TWB405 ICN → FCO May 23, 12:45 UTCMay 23, 16:30 UTC3h 45m
2026-05-23 TWB405 ICN → FCO May 23, 04:20 UTCMay 23, 04:35 UTC15m
2026-05-16 TWB406 FCO → ICN May 16, 19:35 UTCMay 17, 06:20 UTC10h 45m
2026-05-16 TWB405 ICN → FCO May 16, 12:31 UTCMay 16, 16:55 UTC4h 25m
2026-05-16 TWB405 ICN → FCO May 16, 04:05 UTCMay 16, 04:20 UTC15m
2026-05-15 TWB406 FCO → ICN May 15, 06:15 UTCMay 15, 06:40 UTC25m
2026-05-14 TWB406 FCO → ICN May 14, 19:30 UTCMay 14, 23:00 UTC3h 30m
2026-05-14 TWB405 ICN → FCO May 14, 12:30 UTCMay 14, 16:30 UTC4h 0m
2026-05-14 TWB405 ICN → FCO May 14, 04:00 UTCMay 14, 04:15 UTC15m
2026-05-13 TWB406 FCO → ICN May 13, 06:55 UTCMay 13, 07:10 UTC15m
2026-05-12 TWB406 FCO → ICN May 12, 20:01 UTCMay 12, 21:40 UTC1h 40m
2026-05-12 TWB405 ICN → FCO May 12, 12:35 UTCMay 12, 16:45 UTC4h 10m
2026-05-09 TWB406 FCO → ICN May 9, 19:35 UTCMay 9, 22:55 UTC3h 20m
2026-05-09 TWB405 ICN → FCO May 9, 05:35 UTCMay 9, 17:05 UTC11h 30m
2026-05-07 TWB406 FCO → ICN May 7, 19:40 UTCMay 8, 06:30 UTC10h 50m
2026-05-07 TWB405 ICN → FCO May 7, 09:40 UTCMay 7, 17:10 UTC7h 30m
2026-05-07 TWB405 ICN → FCO May 7, 04:15 UTCMay 7, 04:25 UTC10m
2026-05-06 TWB406 FCO → ICN May 6, 06:30 UTCMay 6, 06:40 UTC10m
2026-05-05 TWB406 FCO → ICN May 5, 19:45 UTCMay 6, 05:35 UTC9h 50m
2026-05-05 TWB405 ICN → FCO May 5, 05:10 UTCMay 5, 16:35 UTC11h 25m
2026-05-05 TWB405 ICN → FCO May 5, 04:00 UTCMay 5, 04:10 UTC10m
2026-05-03 TWB406 FCO → ICN May 3, 06:40 UTCMay 3, 06:50 UTC10m
2026-05-02 TWB406 FCO → ICN May 2, 19:40 UTCMay 3, 05:40 UTC9h 59m
2026-05-02 TWB405 ICN → FCO May 2, 04:00 UTCMay 2, 16:40 UTC12h 40m
2026-05-01 TWB406 FCO → ICN May 1, 05:45 UTCMay 1, 06:10 UTC25m
2026-04-30 TWB406 FCO → ICN Apr 30, 19:35 UTCMay 1, 05:05 UTC9h 30m
2026-04-30 TWB405 ICN → FCO Apr 30, 05:15 UTCApr 30, 16:40 UTC11h 25m
2026-04-29 TWB406 FCO → ICN Apr 29, 06:10 UTCApr 29, 06:25 UTC15m
2026-04-28 TWB406 FCO → ICN Apr 28, 19:35 UTCApr 29, 05:20 UTC9h 45m
2026-04-28 TWB405 ICN → FCO Apr 28, 05:25 UTCApr 28, 16:45 UTC11h 20m
2026-04-28 TWB405 ICN → FCO Apr 28, 04:05 UTCApr 28, 04:15 UTC10m
2026-04-26 TWB406 FCO → ICN Apr 26, 06:00 UTCApr 26, 06:20 UTC20m
2026-04-25 TWB406 FCO → ICN Apr 25, 19:45 UTCApr 26, 05:10 UTC9h 25m
2026-04-25 TWB405 ICN → FCO Apr 25, 13:05 UTCApr 25, 16:55 UTC3h 50m
2026-04-24 TWB406 FCO → ICN Apr 24, 06:00 UTCApr 24, 06:25 UTC25m

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?
Yes. Mode-S 71C707 is currently airborne.
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.