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 2h ago
Flights observed
223
Distinct callsigns
20
Country
KR
Last broadcast
2h 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 20 distinct

Callsign Airline Flights Last seen
TWB162 - 25 2026-07-07
TWB155 - 25 2026-07-11
TWB161 - 24 2026-07-07
TWB156 - 20 2026-07-11
TWB643 Tway Airlines 16 2026-05-04
TWB501 - 13 2026-06-26
TWB531 - 12 2026-07-12
TWB644 Tway Airlines 11 2026-05-04
TWB532 - 11 2026-07-13
TWB502 - 11 2026-06-27
TWB613 - 9 2026-07-13
TWB614 - 8 2026-07-11
TWB264 - 8 2026-07-09
TWB263 - 8 2026-07-09
TWB202 Tway Airlines 7 2026-05-29
TWB201 Tway Airlines 6 2026-05-29
TWB421 Tway Airlines 4 2026-06-17
TWB422 Tway Airlines 3 2026-06-17
TWB302 Tway Airlines 1 2026-05-25
TWB301 Tway Airlines 1 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 TWB613 - Jul 13, 23:30 UTCJul 13, 23:55 UTC25m
2026-07-13 TWB532 - Jul 13, 00:35 UTCJul 13, 11:15 UTC10h 40m
2026-07-12 TWB531 - Jul 12, 11:50 UTCJul 12, 21:45 UTC9h 55m
2026-07-11 TWB156 - Jul 11, 16:50 UTCJul 11, 22:15 UTC5h 25m
2026-07-11 TWB155 - Jul 11, 12:45 UTCJul 11, 13:00 UTC15m
2026-07-11 TWB155 - Jul 11, 06:25 UTCJul 11, 11:20 UTC4h 55m
2026-07-11 TWB614 - Jul 11, 04:05 UTCJul 11, 04:30 UTC25m
2026-07-10 TWB613 - Jul 10, 23:15 UTCJul 10, 23:35 UTC20m
2026-07-10 TWB614 - Jul 10, 04:00 UTCJul 10, 04:20 UTC20m
2026-07-09 TWB613 - Jul 9, 23:15 UTCJul 9, 23:40 UTC25m
2026-07-09 TWB264 - Jul 9, 06:10 UTCJul 9, 08:35 UTC2h 25m
2026-07-09 TWB263 - Jul 9, 01:25 UTCJul 9, 03:45 UTC2h 20m
2026-07-08 TWB156 - Jul 8, 17:05 UTCJul 8, 22:20 UTC5h 15m
2026-07-08 TWB155 - Jul 8, 13:25 UTCJul 8, 13:40 UTC15m
2026-07-08 TWB155 - Jul 8, 07:15 UTCJul 8, 12:00 UTC4h 45m
2026-07-08 TWB614 - Jul 8, 03:55 UTCJul 8, 04:20 UTC25m
2026-07-07 TWB613 - Jul 7, 23:30 UTCJul 7, 23:50 UTC20m
2026-07-07 TWB162 - Jul 7, 18:40 UTCJul 7, 21:30 UTC2h 50m
2026-07-07 TWB162 - Jul 7, 15:15 UTCJul 7, 15:25 UTC10m
2026-07-07 TWB161 - Jul 7, 07:10 UTCJul 7, 12:50 UTC5h 40m
2026-07-07 TWB614 - Jul 7, 03:50 UTCJul 7, 04:10 UTC20m
2026-07-06 TWB613 - Jul 6, 23:20 UTCJul 6, 23:45 UTC25m
2026-07-05 TWB532 YVR → ICN Jul 5, 00:45 UTCJul 5, 11:45 UTC11h 0m
2026-07-04 TWB531 ICN → YVR Jul 4, 11:55 UTCJul 4, 21:40 UTC9h 45m
2026-07-04 TWB614 - Jul 4, 06:10 UTCJul 4, 06:45 UTC35m
2026-07-03 TWB613 - Jul 3, 23:30 UTCJul 3, 23:50 UTC20m
2026-07-03 TWB532 YVR → ICN Jul 3, 00:50 UTCJul 3, 12:20 UTC11h 30m
2026-07-02 TWB531 ICN → YVR Jul 2, 12:00 UTCJul 2, 21:15 UTC9h 15m
2026-07-02 TWB264 CTS → ICN Jul 2, 05:45 UTCJul 2, 08:25 UTC2h 40m
2026-07-02 TWB263 - Jul 2, 01:35 UTCJul 2, 03:40 UTC2h 5m
2026-07-01 TWB156 - Jul 1, 16:55 UTCJul 1, 22:15 UTC5h 20m
2026-07-01 TWB155 - Jul 1, 13:00 UTCJul 1, 13:20 UTC20m
2026-07-01 TWB155 - Jul 1, 06:45 UTCJul 1, 11:35 UTC4h 50m
2026-07-01 TWB614 - Jul 1, 03:40 UTCJul 1, 04:05 UTC25m
2026-06-30 TWB613 - Jun 30, 23:30 UTCJun 30, 23:50 UTC20m
2026-06-30 TWB162 - Jun 30, 18:30 UTCJun 30, 21:30 UTC3h 0m
2026-06-30 TWB162 - Jun 30, 15:25 UTCJun 30, 15:35 UTC10m
2026-06-30 TWB161 - Jun 30, 12:35 UTCJun 30, 12:55 UTC20m
2026-06-30 TWB161 - Jun 30, 07:15 UTCJun 30, 10:05 UTC2h 50m
2026-06-30 TWB614 - Jun 30, 03:55 UTCJun 30, 04:25 UTC30m
2026-06-29 TWB613 - Jun 29, 23:19 UTCJun 29, 23:39 UTC20m
2026-06-29 TWB264 - Jun 29, 05:45 UTCJun 29, 08:14 UTC2h 30m
2026-06-29 TWB263 - Jun 29, 01:29 UTCJun 29, 03:34 UTC2h 5m
2026-06-28 TWB156 - Jun 28, 16:45 UTCJun 28, 21:50 UTC5h 5m
2026-06-28 TWB155 - Jun 28, 12:39 UTCJun 28, 13:00 UTC20m
2026-06-28 TWB155 - Jun 28, 06:30 UTCJun 28, 11:14 UTC4h 45m
2026-06-27 TWB502 SYD → ICN Jun 27, 02:09 UTCJun 27, 12:04 UTC9h 55m
2026-06-26 TWB501 - Jun 26, 13:19 UTCJun 26, 23:15 UTC9h 55m
2026-06-26 TWB264 - Jun 26, 05:55 UTCJun 26, 08:30 UTC2h 35m
2026-06-26 TWB263 - Jun 26, 01:39 UTCJun 26, 03:54 UTC2h 15m

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 2h 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 20 distinct callsigns, including TWB162, TWB155, TWB161, TWB156, TWB643.