Apparatus

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sensors Mode-S transponder

71C500

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

Currently assigned to HL8500 · AIRBUS A-330-300

Hex
71C500
Octal
34342400
Decimal
7,456,000
Country
KR
Tail
HL8500
Type
A333
Broadcasting now · callsign TWB502 · 36,000 ft
Flights observed
99
Distinct callsigns
15
Country
KR
Last broadcast
1h ago

Current position

71C500 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C500 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 15 distinct

Callsign Airline Flights Last seen
TWB155 Tway Airlines 15 2026-06-21
TWB156 Tway Airlines 14 2026-06-21
TWB162 Tway Airlines 9 2026-06-05
TWB531 - 7 2026-06-18
TWB502 - 7 2026-06-23
TWB501 - 7 2026-06-22
TWB421 Tway Airlines 7 2026-06-22
TWB202 Tway Airlines 7 2026-06-03
TWB161 Tway Airlines 7 2026-06-05
TWB532 - 6 2026-06-19
TWB422 Tway Airlines 6 2026-06-22
TWB201 Tway Airlines 4 2026-06-03
TWB304 Tway Airlines 1 2026-05-27
TWB303 Tway Airlines 1 2026-05-27
TWB102F - 1 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-23 TWB502 - Jun 23, 02:20 UTCJun 23, 03:25 UTC1h 5m
2026-06-22 TWB501 - Jun 22, 13:29 UTCJun 22, 23:14 UTC9h 45m
2026-06-22 TWB422 UBN → ICN Jun 22, 09:49 UTCJun 22, 10:15 UTC25m
2026-06-22 TWB421 ICN → UBN Jun 22, 02:59 UTCJun 22, 04:40 UTC1h 40m
2026-06-21 TWB156 CGK → ICN Jun 21, 16:54 UTCJun 21, 22:04 UTC5h 10m
2026-06-21 TWB156 CGK → ICN Jun 21, 15:09 UTCJun 21, 15:25 UTC15m
2026-06-21 TWB155 ICN → CGK Jun 21, 06:29 UTCJun 21, 11:30 UTC5h 0m
2026-06-19 TWB532 - Jun 19, 00:45 UTCJun 19, 11:59 UTC11h 15m
2026-06-18 TWB531 ICN → YVR Jun 18, 12:10 UTCJun 18, 22:05 UTC9h 55m
2026-06-17 TWB532 YVR → ICN Jun 17, 00:40 UTCJun 17, 12:10 UTC11h 30m
2026-06-16 TWB531 - Jun 16, 21:10 UTCJun 16, 21:35 UTC25m
2026-06-16 TWB531 - Jun 16, 11:55 UTCJun 16, 13:50 UTC1h 55m
2026-06-15 TWB532 - Jun 15, 00:49 UTCJun 15, 12:25 UTC11h 35m
2026-06-14 TWB531 ICN → YVR Jun 14, 11:50 UTCJun 14, 21:15 UTC9h 25m
2026-06-14 TWB422 UBN → ICN Jun 14, 09:20 UTCJun 14, 09:45 UTC25m
2026-06-14 TWB421 ICN → UBN Jun 14, 02:05 UTCJun 14, 02:25 UTC20m
2026-06-13 TWB502 SYD → ICN Jun 13, 02:05 UTCJun 13, 12:15 UTC10h 9m
2026-06-12 TWB501 ICN → SYD Jun 12, 13:25 UTCJun 13, 00:05 UTC10h 40m
2026-06-12 TWB422 UBN → ICN Jun 12, 09:35 UTCJun 12, 10:00 UTC25m
2026-06-12 TWB421 ICN → UBN Jun 12, 03:50 UTCJun 12, 04:10 UTC20m
2026-06-12 TWB421 ICN → UBN Jun 12, 02:25 UTCJun 12, 02:50 UTC25m
2026-06-10 TWB422 UBN → ICN Jun 10, 09:20 UTCJun 10, 09:40 UTC20m
2026-06-10 TWB421 ICN → UBN Jun 10, 03:20 UTCJun 10, 03:40 UTC20m
2026-06-10 TWB421 ICN → UBN Jun 10, 02:00 UTCJun 10, 02:15 UTC15m
2026-06-09 TWB502 SYD → ICN Jun 9, 02:15 UTCJun 9, 12:40 UTC10h 25m
2026-06-08 TWB501 ICN → SYD Jun 8, 13:45 UTCJun 8, 23:30 UTC9h 45m
2026-06-08 TWB422 UBN → ICN Jun 8, 09:50 UTCJun 8, 09:55 UTC5m
2026-06-08 TWB422 UBN → ICN Jun 8, 09:25 UTCJun 8, 09:45 UTC20m
2026-06-08 TWB421 ICN → UBN Jun 8, 01:50 UTCJun 8, 03:40 UTC1h 50m
2026-06-07 TWB156 CGK → ICN Jun 7, 17:00 UTCJun 7, 21:50 UTC4h 50m
2026-06-07 TWB155 ICN → CGK Jun 7, 13:00 UTCJun 7, 13:20 UTC20m
2026-06-07 TWB155 ICN → CGK Jun 7, 06:45 UTCJun 7, 11:25 UTC4h 40m
2026-06-06 TWB156 CGK → ICN Jun 6, 17:00 UTCJun 6, 22:10 UTC5h 10m
2026-06-06 TWB156 CGK → ICN Jun 6, 15:05 UTCJun 6, 15:15 UTC10m
2026-06-06 TWB155 ICN → CGK Jun 6, 12:45 UTCJun 6, 13:00 UTC15m
2026-06-06 TWB155 ICN → CGK Jun 6, 06:25 UTCJun 6, 11:09 UTC4h 45m
2026-06-05 TWB162 SIN → ICN Jun 5, 18:55 UTCJun 5, 21:45 UTC2h 50m
2026-06-05 TWB161 ICN → SIN Jun 5, 07:15 UTCJun 5, 10:10 UTC2h 55m
2026-06-03 TWB162 SIN → ICN Jun 3, 18:30 UTCJun 3, 21:30 UTC3h 0m
2026-06-03 TWB161 ICN → SIN Jun 3, 07:15 UTCJun 3, 09:55 UTC2h 40m
2026-06-03 TWB202 NRT → TAE Jun 3, 03:50 UTCJun 3, 04:45 UTC55m
2026-06-03 TWB201 ICN → FUK Jun 3, 01:15 UTCJun 3, 01:45 UTC30m
2026-06-01 TWB162 SIN → ICN Jun 1, 18:20 UTCJun 1, 21:20 UTC3h 0m
2026-06-01 TWB162 SIN → ICN Jun 1, 15:25 UTCJun 1, 15:35 UTC10m
2026-06-01 TWB161 ICN → SIN Jun 1, 07:25 UTCJun 1, 10:15 UTC2h 50m
2026-05-31 TWB156 CGK → ICN May 31, 16:55 UTCMay 31, 21:55 UTC5h 0m
2026-05-31 TWB156 CGK → ICN May 31, 15:00 UTCMay 31, 15:10 UTC10m
2026-05-31 TWB155 ICN → CGK May 31, 12:40 UTCMay 31, 13:00 UTC20m
2026-05-31 TWB155 ICN → CGK May 31, 08:25 UTCMay 31, 11:10 UTC2h 45m
2026-05-30 TWB162 SIN → ICN May 30, 18:35 UTCMay 30, 21:35 UTC3h 0m

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 HL8500 page for operator, model, and routing details .

Mode-S 71C500 frequently asked

What is Mode-S code 71C500?
71C500 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8500.
Where is Mode-S 71C500 registered?
Mode-S code 71C500 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 71C500 broadcasting right now?
Yes. Mode-S 71C500 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C500, octal 34342400, decimal 7,456,000.
What flights does 71C500 operate?
Mode-S 71C500 has broadcast 15 distinct callsigns, including TWB155, TWB156, TWB162, TWB531, TWB502.