Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C514

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

Currently assigned to HL8514 · BOEING 737 MAX 8

Hex
71C514
Octal
34342424
Decimal
7,456,020
Country
KR
Tail
HL8514
Type
B38M
No current signal · last broadcast Jul 26, 12:20 UTC
Flights observed
582
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 12:20 UTC

Last known position

Most recent position reported by Mode-S 71C514.

Country allocation

The ICAO 24-bit address 71C514 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
TWB835 Tway Airlines 33 2026-07-26
TWB836 Tway Airlines 32 2026-07-25
TWB742 - 32 2026-07-24
TWB743 Tway Airlines 31 2026-07-24
TWB165 - 31 2026-06-21
TWB731 Tway Airlines 30 2026-07-26
TWB713 Tway Airlines 30 2026-07-22
TWB712 Tway Airlines 30 2026-07-26
TWB838 Tway Airlines 28 2026-07-25
TWB732 - 27 2026-07-26
TWB724 Tway Airlines 26 2026-07-26
TWB705 Tway Airlines 26 2026-07-21
TWB166 - 26 2026-06-21
TWB723 Tway Airlines 25 2026-07-26
TWB837 Tway Airlines 24 2026-07-25
TWB708 Tway Airlines 24 2026-07-22
TWB840 - 23 2026-07-25
TWB839 Tway Airlines 23 2026-07-25
TWB158 Tway Airlines 6 2026-07-16
TWB025 Tway Airlines 5 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TWB732 - Jul 26, 11:40 UTCJul 26, 12:20 UTC40m
2026-07-26 TWB731 GMP → CJU Jul 26, 09:25 UTCJul 26, 10:00 UTC35m
2026-07-26 TWB724 CJU → GMP Jul 26, 07:40 UTCJul 26, 08:15 UTC35m
2026-07-26 TWB723 GMP → CJU Jul 26, 05:25 UTCJul 26, 06:00 UTC35m
2026-07-26 TWB712 CJU → GMP Jul 26, 03:10 UTCJul 26, 03:55 UTC45m
2026-07-26 TWB835 CJJ → CJU Jul 26, 00:30 UTCJul 26, 01:00 UTC30m
2026-07-25 TWB840 - Jul 25, 10:15 UTCJul 25, 10:50 UTC35m
2026-07-25 TWB839 CJJ → CJU Jul 25, 08:10 UTCJul 25, 08:45 UTC35m
2026-07-25 TWB838 CJU → CJJ Jul 25, 06:25 UTCJul 25, 06:55 UTC30m
2026-07-25 TWB837 CJJ → CJU Jul 25, 04:15 UTCJul 25, 04:45 UTC30m
2026-07-25 TWB836 CJU → CJJ Jul 25, 02:35 UTCJul 25, 03:05 UTC30m
2026-07-24 TWB743 GMP → CJU Jul 24, 09:00 UTCJul 24, 09:40 UTC40m
2026-07-24 TWB742 - Jul 24, 07:20 UTCJul 24, 08:00 UTC40m
2026-07-24 TWB837 CJJ → CJU Jul 24, 04:15 UTCJul 24, 04:45 UTC30m
2026-07-24 TWB836 CJU → CJJ Jul 24, 02:40 UTCJul 24, 03:10 UTC30m
2026-07-23 TWB731 GMP → CJU Jul 23, 09:40 UTCJul 23, 10:20 UTC40m
2026-07-23 TWB724 - Jul 23, 08:00 UTCJul 23, 08:45 UTC45m
2026-07-23 TWB723 GMP → CJU Jul 23, 05:20 UTCJul 23, 05:50 UTC30m
2026-07-23 TWB712 CJU → GMP Jul 23, 03:10 UTCJul 23, 03:50 UTC40m
2026-07-23 TWB835 CJJ → CJU Jul 23, 00:45 UTCJul 23, 01:15 UTC30m
2026-07-22 TWB713 GMP → CJU Jul 22, 03:35 UTCJul 22, 04:10 UTC35m
2026-07-22 TWB708 CJU → GMP Jul 22, 01:20 UTCJul 22, 02:00 UTC40m
2026-07-21 TWB705 GMP → CJU Jul 21, 23:05 UTCJul 21, 23:40 UTC35m
2026-07-21 TWB732 - Jul 21, 11:40 UTCJul 21, 12:25 UTC45m
2026-07-21 TWB731 GMP → CJU Jul 21, 09:40 UTCJul 21, 10:15 UTC35m
2026-07-21 TWB724 - Jul 21, 07:45 UTCJul 21, 08:25 UTC40m
2026-07-21 TWB723 - Jul 21, 05:30 UTCJul 21, 06:20 UTC50m
2026-07-21 TWB712 CJU → GMP Jul 21, 03:00 UTCJul 21, 03:40 UTC40m
2026-07-21 TWB835 - Jul 21, 00:30 UTCJul 21, 00:55 UTC25m
2026-07-20 TWB025 CJJ → DAD Jul 20, 12:20 UTCJul 20, 22:05 UTC9h 45m
2026-07-20 TWB840 - Jul 20, 10:20 UTCJul 20, 10:55 UTC35m
2026-07-20 TWB839 - Jul 20, 08:15 UTCJul 20, 08:45 UTC30m
2026-07-20 TWB838 - Jul 20, 06:25 UTCJul 20, 07:00 UTC35m
2026-07-20 TWB837 CJJ → CJU Jul 20, 04:20 UTCJul 20, 04:50 UTC30m
2026-07-20 TWB836 - Jul 20, 02:40 UTCJul 20, 03:10 UTC30m
2026-07-19 TWB731 - Jul 19, 09:15 UTCJul 19, 09:50 UTC35m
2026-07-19 TWB724 - Jul 19, 07:35 UTCJul 19, 08:10 UTC35m
2026-07-19 TWB723 - Jul 19, 05:15 UTCJul 19, 05:50 UTC35m
2026-07-19 TWB712 - Jul 19, 03:10 UTCJul 19, 03:45 UTC35m
2026-07-19 TWB835 - Jul 19, 00:25 UTCJul 19, 00:55 UTC30m
2026-07-18 TWB840 - Jul 18, 10:25 UTCJul 18, 10:50 UTC25m
2026-07-18 TWB839 - Jul 18, 08:10 UTCJul 18, 08:40 UTC30m
2026-07-18 TWB838 - Jul 18, 06:30 UTCJul 18, 07:00 UTC30m
2026-07-18 TWB713 - Jul 18, 03:30 UTCJul 18, 04:10 UTC40m
2026-07-18 TWB708 - Jul 18, 01:30 UTCJul 18, 02:05 UTC35m
2026-07-17 TWB705 - Jul 17, 23:05 UTCJul 17, 23:45 UTC40m
2026-07-17 TWB732 - Jul 17, 11:30 UTCJul 17, 12:15 UTC45m
2026-07-17 TWB731 - Jul 17, 09:10 UTCJul 17, 09:50 UTC40m
2026-07-17 TWB724 - Jul 17, 07:30 UTCJul 17, 08:04 UTC35m
2026-07-17 TWB723 - Jul 17, 05:15 UTCJul 17, 05:50 UTC35m

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 HL8514 page for operator, model, and routing details .

Mode-S 71C514 frequently asked

What is Mode-S code 71C514?
71C514 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8514.
Where is Mode-S 71C514 registered?
Mode-S code 71C514 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 71C514 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 12:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C514, octal 34342424, decimal 7,456,020.
What flights does 71C514 operate?
Mode-S 71C514 has broadcast 20 distinct callsigns, including TWB835, TWB836, TWB742, TWB743, TWB165.