Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C706

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

Currently assigned to HL8706 · BOEING 777-300ER

Hex
71C706
Octal
34343406
Decimal
7,456,518
Country
KR
Tail
HL8706
Type
B77W
No current signal · last broadcast 42m ago
Flights observed
63
Distinct callsigns
2
Country
KR
Last broadcast
42m ago

Last known position

Most recent position reported by Mode-S 71C706.

Country allocation

The ICAO 24-bit address 71C706 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
TWB402 Tway Airlines 32 2026-05-29
TWB401 Tway Airlines 31 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 TWB402 CDG → ICN May 29, 19:05 UTCMay 30, 05:25 UTC10h 20m
2026-05-29 TWB401 ICN → CDG May 29, 03:15 UTCMay 29, 15:50 UTC12h 35m
2026-05-29 TWB401 ICN → CDG May 29, 01:55 UTCMay 29, 02:10 UTC15m
2026-05-28 TWB402 CDG → ICN May 28, 05:50 UTCMay 28, 06:10 UTC20m
2026-05-27 TWB402 CDG → ICN May 27, 19:00 UTCMay 28, 05:05 UTC10h 5m
2026-05-27 TWB401 ICN → CDG May 27, 02:59 UTCMay 27, 15:35 UTC12h 35m
2026-05-27 TWB401 ICN → CDG May 27, 01:44 UTCMay 27, 02:04 UTC20m
2026-05-25 TWB402 CDG → ICN May 25, 06:30 UTCMay 25, 06:50 UTC20m
2026-05-24 TWB402 CDG → ICN May 24, 18:55 UTCMay 24, 21:40 UTC2h 45m
2026-05-24 TWB401 ICN → CDG May 24, 10:05 UTCMay 24, 14:40 UTC4h 35m
2026-05-24 TWB401 ICN → CDG May 24, 01:35 UTCMay 24, 01:50 UTC15m
2026-05-23 TWB402 CDG → ICN May 23, 06:05 UTCMay 23, 06:25 UTC20m
2026-05-22 TWB402 CDG → ICN May 22, 18:55 UTCMay 22, 23:15 UTC4h 20m
2026-05-22 TWB401 ICN → CDG May 22, 01:50 UTCMay 22, 15:20 UTC13h 30m
2026-05-21 TWB402 CDG → ICN May 21, 06:30 UTCMay 21, 06:50 UTC20m
2026-05-20 TWB402 CDG → ICN May 20, 19:05 UTCMay 21, 05:40 UTC10h 35m
2026-05-20 TWB401 ICN → CDG May 20, 03:20 UTCMay 20, 15:25 UTC12h 6m
2026-05-20 TWB401 ICN → CDG May 20, 02:05 UTCMay 20, 02:20 UTC15m
2026-05-17 TWB402 CDG → ICN May 17, 19:05 UTCMay 17, 21:40 UTC2h 35m
2026-05-17 TWB401 ICN → CDG May 17, 09:45 UTCMay 17, 14:45 UTC5h 0m
2026-05-17 TWB401 ICN → CDG May 17, 01:35 UTCMay 17, 01:50 UTC15m
2026-05-10 TWB402 CDG → ICN May 10, 18:55 UTCMay 10, 23:00 UTC4h 5m
2026-05-10 TWB401 ICN → CDG May 10, 10:24 UTCMay 10, 15:15 UTC4h 50m
2026-05-10 TWB401 ICN → CDG May 10, 01:39 UTCMay 10, 01:50 UTC10m
2026-05-08 TWB402 CDG → ICN May 8, 19:00 UTCMay 9, 05:20 UTC10h 20m
2026-05-08 TWB401 ICN → CDG May 8, 07:14 UTCMay 8, 15:30 UTC8h 15m
2026-05-06 TWB402 CDG → ICN May 6, 18:50 UTCMay 7, 05:25 UTC10h 35m
2026-05-06 TWB401 ICN → CDG May 6, 01:50 UTCMay 6, 15:20 UTC13h 30m
2026-05-03 TWB402 CDG → ICN May 3, 18:55 UTCMay 4, 05:45 UTC10h 50m
2026-05-03 TWB401 ICN → CDG May 3, 09:55 UTCMay 3, 14:35 UTC4h 40m
2026-05-01 TWB402 CDG → ICN May 1, 19:00 UTCMay 2, 05:45 UTC10h 45m
2026-05-01 TWB401 ICN → CDG May 1, 10:15 UTCMay 1, 15:10 UTC4h 55m
2026-04-30 TWB402 CDG → ICN Apr 30, 06:15 UTCApr 30, 06:25 UTC10m
2026-04-29 TWB402 CDG → ICN Apr 29, 18:55 UTCApr 30, 05:15 UTC10h 19m
2026-04-29 TWB401 ICN → CDG Apr 29, 09:55 UTCApr 29, 15:05 UTC5h 10m
2026-04-26 TWB402 CDG → ICN Apr 26, 18:45 UTCApr 27, 05:05 UTC10h 20m
2026-04-26 TWB401 ICN → CDG Apr 26, 10:20 UTCApr 26, 15:20 UTC5h 0m
2026-04-25 TWB402 CDG → ICN Apr 25, 06:10 UTCApr 25, 06:20 UTC10m
2026-04-24 TWB402 CDG → ICN Apr 24, 18:50 UTCApr 25, 05:05 UTC10h 15m
2026-04-24 TWB401 ICN → CDG Apr 24, 10:20 UTCApr 24, 15:20 UTC5h 0m
2026-04-24 TWB401 ICN → CDG Apr 24, 01:35 UTCApr 24, 01:45 UTC10m
2026-04-22 TWB402 CDG → ICN Apr 22, 18:45 UTCApr 23, 05:15 UTC10h 30m
2026-04-22 TWB401 ICN → CDG Apr 22, 10:25 UTCApr 22, 15:35 UTC5h 10m
2026-04-22 TWB401 ICN → CDG Apr 22, 03:00 UTCApr 22, 03:30 UTC30m
2026-04-20 TWB402 CDG → ICN Apr 20, 05:50 UTCApr 20, 06:05 UTC15m
2026-04-19 TWB402 CDG → ICN Apr 19, 18:45 UTCApr 20, 05:00 UTC10h 15m
2026-04-19 TWB401 ICN → CDG Apr 19, 02:50 UTCApr 19, 15:40 UTC12h 50m
2026-04-17 TWB402 CDG → ICN Apr 17, 21:25 UTCApr 17, 23:00 UTC1h 35m
2026-04-17 TWB402 CDG → ICN Apr 17, 19:25 UTCApr 17, 21:20 UTC1h 55m
2026-04-17 TWB402 CDG → ICN Apr 17, 18:50 UTCApr 17, 19:20 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 HL8706 page for operator, model, and routing details .

Mode-S 71C706 frequently asked

What is Mode-S code 71C706?
71C706 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8706.
Where is Mode-S 71C706 registered?
Mode-S code 71C706 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 71C706 broadcasting right now?
No active broadcast right now. Last signal was 42m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C706, octal 34343406, decimal 7,456,518.
What flights does 71C706 operate?
Mode-S 71C706 has broadcast 2 distinct callsigns, including TWB402, TWB401.