Apparatus

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sensors Mode-S transponder

71C502

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

Currently assigned to HL8502 · AIRBUS A-330-300

Hex
71C502
Octal
34342402
Decimal
7,456,002
Country
KR
Tail
HL8502
Type
A333
No current signal · last broadcast 1h ago
Flights observed
116
Distinct callsigns
14
Country
KR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 71C502.

Country allocation

The ICAO 24-bit address 71C502 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 14 distinct

Callsign Airline Flights Last seen
TWB643 Tway Airlines 16 2026-05-04
TWB161 Tway Airlines 13 2026-05-27
TWB162 Tway Airlines 12 2026-05-27
TWB156 Tway Airlines 12 2026-05-25
TWB644 Tway Airlines 11 2026-05-04
TWB155 Tway Airlines 11 2026-05-25
TWB501 Tway Airlines 10 2026-05-29
TWB502 Tway Airlines 7 2026-05-21
TWB202 Tway Airlines 7 2026-05-29
TWB201 Tway Airlines 6 2026-05-29
TWB531 Tway Airlines 5 2026-05-23
TWB532 Tway Airlines 4 2026-05-24
TWB302 Tway Airlines 1 2026-05-25
TWB301 Tway Airlines 1 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 TWB501 ICN → SYD May 29, 13:30 UTCMay 29, 23:30 UTC10h 1m
2026-05-29 TWB202 NRT → TAE May 29, 04:35 UTCMay 29, 05:10 UTC35m
2026-05-29 TWB201 ICN → FUK May 29, 01:35 UTCMay 29, 02:05 UTC30m
2026-05-27 TWB162 SIN → ICN May 27, 18:35 UTCMay 27, 21:45 UTC3h 10m
2026-05-27 TWB161 ICN → SIN May 27, 07:45 UTCMay 27, 10:35 UTC2h 50m
2026-05-26 TWB202 NRT → TAE May 26, 04:00 UTCMay 26, 05:05 UTC1h 5m
2026-05-26 TWB201 ICN → FUK May 26, 01:24 UTCMay 26, 01:55 UTC30m
2026-05-25 TWB156 CGK → ICN May 25, 17:00 UTCMay 25, 22:00 UTC5h 0m
2026-05-25 TWB156 CGK → ICN May 25, 15:00 UTCMay 25, 15:10 UTC10m
2026-05-25 TWB155 ICN → CGK May 25, 06:30 UTCMay 25, 11:15 UTC4h 45m
2026-05-25 TWB302 KIX → ICN May 25, 02:55 UTCMay 25, 04:15 UTC1h 20m
2026-05-24 TWB301 ICN → KIX May 24, 23:20 UTCMay 24, 23:40 UTC20m
2026-05-24 TWB532 YVR → ICN May 24, 00:50 UTCMay 24, 11:50 UTC11h 0m
2026-05-23 TWB531 ICN → YVR May 23, 11:55 UTCMay 23, 21:10 UTC9h 16m
2026-05-22 TWB156 CGK → ICN May 22, 16:55 UTCMay 22, 21:50 UTC4h 55m
2026-05-22 TWB156 CGK → ICN May 22, 15:00 UTCMay 22, 15:10 UTC10m
2026-05-22 TWB155 ICN → CGK May 22, 12:55 UTCMay 22, 13:05 UTC10m
2026-05-22 TWB155 ICN → CGK May 22, 06:30 UTCMay 22, 11:20 UTC4h 49m
2026-05-21 TWB502 SYD → ICN May 21, 01:55 UTCMay 21, 12:15 UTC10h 20m
2026-05-20 TWB501 ICN → SYD May 20, 13:30 UTCMay 20, 23:20 UTC9h 50m
2026-05-19 TWB201 ICN → FUK May 19, 01:30 UTCMay 19, 04:50 UTC3h 20m
2026-05-18 TWB162 SIN → ICN May 18, 18:25 UTCMay 18, 21:45 UTC3h 19m
2026-05-18 TWB161 ICN → SIN May 18, 07:05 UTCMay 18, 12:45 UTC5h 40m
2026-05-18 TWB202 NRT → TAE May 18, 01:20 UTCMay 18, 04:55 UTC3h 35m
2026-05-17 TWB156 CGK → ICN May 17, 16:40 UTCMay 17, 22:01 UTC5h 20m
2026-05-17 TWB156 CGK → ICN May 17, 14:55 UTCMay 17, 15:05 UTC10m
2026-05-17 TWB155 ICN → CGK May 17, 06:25 UTCMay 17, 11:01 UTC4h 35m
2026-05-16 TWB156 CGK → ICN May 16, 16:50 UTCMay 16, 22:10 UTC5h 20m
2026-05-16 TWB156 CGK → ICN May 16, 15:05 UTCMay 16, 15:20 UTC15m
2026-05-16 TWB155 ICN → CGK May 16, 06:31 UTCMay 16, 11:16 UTC4h 45m
2026-05-16 TWB202 NRT → TAE May 16, 04:15 UTCMay 16, 04:55 UTC40m
2026-05-16 TWB201 ICN → FUK May 16, 01:20 UTCMay 16, 01:50 UTC30m
2026-05-15 TWB156 CGK → ICN May 15, 16:40 UTCMay 15, 21:50 UTC5h 10m
2026-05-15 TWB155 ICN → CGK May 15, 12:50 UTCMay 15, 13:05 UTC15m
2026-05-15 TWB155 ICN → CGK May 15, 06:30 UTCMay 15, 11:25 UTC4h 55m
2026-05-13 TWB162 SIN → ICN May 13, 19:35 UTCMay 13, 22:35 UTC3h 0m
2026-05-13 TWB162 SIN → ICN May 13, 16:30 UTCMay 13, 16:40 UTC10m
2026-05-13 TWB161 ICN → SIN May 13, 07:05 UTCMay 13, 09:45 UTC2h 40m
2026-05-12 TWB202 NRT → TAE May 12, 03:50 UTCMay 12, 04:45 UTC55m
2026-05-11 TWB162 SIN → ICN May 11, 18:20 UTCMay 11, 21:25 UTC3h 5m
2026-05-11 TWB161 ICN → SIN May 11, 07:15 UTCMay 11, 10:05 UTC2h 50m
2026-05-11 TWB202 NRT → TAE May 11, 04:40 UTCMay 11, 05:10 UTC30m
2026-05-11 TWB201 ICN → FUK May 11, 01:45 UTCMay 11, 02:10 UTC25m
2026-05-10 TWB532 YVR → ICN May 10, 00:39 UTCMay 10, 11:35 UTC10h 55m
2026-05-09 TWB531 ICN → YVR May 9, 13:10 UTCMay 9, 21:25 UTC8h 15m
2026-05-09 TWB531 ICN → YVR May 9, 12:00 UTCMay 9, 12:30 UTC30m
2026-05-08 TWB532 YVR → ICN May 8, 00:44 UTCMay 8, 12:14 UTC11h 30m
2026-05-07 TWB531 ICN → YVR May 7, 12:10 UTCMay 7, 21:50 UTC9h 40m
2026-05-06 TWB156 CGK → ICN May 6, 16:55 UTCMay 6, 21:50 UTC4h 54m
2026-05-06 TWB156 CGK → ICN May 6, 15:10 UTCMay 6, 15:20 UTC10m

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 HL8502 page for operator, model, and routing details .

Mode-S 71C502 frequently asked

What is Mode-S code 71C502?
71C502 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8502.
Where is Mode-S 71C502 registered?
Mode-S code 71C502 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 71C502 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C502, octal 34342402, decimal 7,456,002.
What flights does 71C502 operate?
Mode-S 71C502 has broadcast 14 distinct callsigns, including TWB643, TWB161, TWB162, TWB156, TWB644.