Apparatus

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sensors Mode-S transponder

71C564

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

Currently assigned to HL8564 · BOEING 737-800

Hex
71C564
Octal
34342544
Decimal
7,456,100
Country
KR
Tail
HL8564
Type
B738
Broadcasting now · callsign TWB288 · 3,750 ft
Flights observed
223
Distinct callsigns
20
Country
KR
Last broadcast
2h ago

Current position

71C564 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C564 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
TWB687 Tway Airlines 7 2026-05-12
TWB810 - 6 2026-07-12
TWB688 Tway Airlines 6 2026-05-12
TWB901 Tway Airlines 5 2026-05-13
TWB314 - 5 2026-07-10
TWB313 - 5 2026-07-13
TWB306 - 5 2026-07-13
TWB305 - 5 2026-07-10
TWB902 Tway Airlines 4 2026-05-13
TWB849 - 4 2026-04-29
TWB801 Tway Airlines 4 2026-05-25
TWB702 Tway Airlines 4 2026-05-25
TWB690 - 4 2026-07-12
TWB689 - 4 2026-07-12
TWB332 Tway Airlines 4 2026-05-24
TWB242 - 4 2026-07-10
TWB241 - 4 2026-07-10
TWB214 - 4 2026-07-09
TWB908 Tway Airlines 3 2026-05-12
TWB903 Tway Airlines 3 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 TWB287 - Jul 13, 23:10 UTCJul 14, 00:10 UTC1h 0m
2026-07-13 TWB306 KIX → ICN Jul 13, 10:55 UTCJul 13, 12:20 UTC1h 25m
2026-07-13 TWB313 - Jul 13, 07:55 UTCJul 13, 09:00 UTC1h 5m
2026-07-13 TWB252 - Jul 13, 05:05 UTCJul 13, 06:05 UTC1h 0m
2026-07-13 TWB251 - Jul 13, 01:50 UTCJul 13, 03:40 UTC1h 50m
2026-07-12 TWB810 - Jul 12, 11:55 UTCJul 12, 12:10 UTC15m
2026-07-12 TWB690 - Jul 12, 08:01 UTCJul 12, 08:45 UTC45m
2026-07-12 TWB689 - Jul 12, 05:55 UTCJul 12, 06:45 UTC50m
2026-07-12 TWB805 - Jul 12, 02:10 UTCJul 12, 02:30 UTC20m
2026-07-11 TWB810 - Jul 11, 13:30 UTCJul 11, 13:45 UTC15m
2026-07-11 TWB811 - Jul 11, 11:15 UTCJul 11, 11:35 UTC20m
2026-07-11 TWB252 - Jul 11, 05:05 UTCJul 11, 06:05 UTC1h 0m
2026-07-11 TWB251 - Jul 11, 02:00 UTCJul 11, 03:25 UTC1h 25m
2026-07-10 TWB314 - Jul 10, 10:40 UTCJul 10, 11:40 UTC1h 0m
2026-07-10 TWB305 ICN → KIX Jul 10, 07:10 UTCJul 10, 08:40 UTC1h 30m
2026-07-10 TWB242 NRT → ICN Jul 10, 03:55 UTCJul 10, 05:55 UTC2h 0m
2026-07-10 TWB241 ICN → NRT Jul 10, 00:40 UTCJul 10, 02:30 UTC1h 50m
2026-07-09 TWB306 KIX → ICN Jul 9, 11:00 UTCJul 9, 12:30 UTC1h 30m
2026-07-09 TWB313 - Jul 9, 08:00 UTCJul 9, 09:10 UTC1h 10m
2026-07-09 TWB214 - Jul 9, 05:55 UTCJul 9, 06:20 UTC25m
2026-07-08 TWB213 TAE → FUK Jul 8, 23:30 UTCJul 8, 23:50 UTC20m
2026-07-08 TWB314 - Jul 8, 10:45 UTCJul 8, 11:15 UTC30m
2026-07-08 TWB305 - Jul 8, 07:10 UTCJul 8, 08:45 UTC1h 35m
2026-07-08 TWB242 NRT → ICN Jul 8, 03:30 UTCJul 8, 05:30 UTC2h 0m
2026-07-07 TWB241 ICN → NRT Jul 7, 23:45 UTCJul 8, 01:40 UTC1h 55m
2026-07-07 TWB208 - Jul 7, 11:50 UTCJul 7, 12:50 UTC1h 0m
2026-07-07 TWB207 - Jul 7, 09:10 UTCJul 7, 09:55 UTC45m
2026-07-07 TWB304 KIX → ICN Jul 7, 05:45 UTCJul 7, 07:05 UTC1h 20m
2026-07-07 TWB303 ICN → KIX Jul 7, 02:00 UTCJul 7, 03:20 UTC1h 20m
2026-06-04 TWB306 KIX → ICN Jun 4, 10:50 UTCJun 4, 12:10 UTC1h 20m
2026-06-04 TWB313 TAE → KIX Jun 4, 08:15 UTCJun 4, 09:00 UTC45m
2026-06-04 TWB214 FUK → TAE Jun 4, 06:05 UTCJun 4, 06:45 UTC40m
2026-06-03 TWB810 CJU → TAE Jun 3, 10:40 UTCJun 3, 10:55 UTC15m
2026-06-03 TWB727 GMP → CJU Jun 3, 08:20 UTCJun 3, 08:45 UTC25m
2026-06-02 TWB924 PUS → GMP Jun 2, 04:05 UTCJun 2, 04:35 UTC30m
2026-06-02 TWB923 GMP → PUS Jun 2, 02:10 UTCJun 2, 02:40 UTC30m
2026-06-01 TWB708 CJU → GMP Jun 1, 01:45 UTCJun 1, 02:20 UTC35m
2026-05-31 TWB705 GMP → CJU May 31, 23:20 UTCMay 31, 23:50 UTC30m
2026-05-29 TWB708 CJU → GMP May 29, 01:35 UTCMay 29, 02:05 UTC30m
2026-05-28 TWB705 GMP → CJU May 28, 23:10 UTCMay 28, 23:35 UTC25m
2026-05-28 TWB708 CJU → GMP May 28, 01:25 UTCMay 28, 01:55 UTC30m
2026-05-26 TWB215 TAE → FUK May 26, 08:15 UTCMay 26, 08:24 UTC10m
2026-05-26 TWB214 FUK → TAE May 26, 06:10 UTCMay 26, 06:44 UTC35m
2026-05-26 TWB707 GMP → CJU May 26, 00:54 UTCMay 26, 01:20 UTC25m
2026-05-25 TWB702 CJU → GMP May 25, 23:24 UTCMay 25, 23:49 UTC25m
2026-05-25 TWB801 TAE → CJU May 25, 21:15 UTCMay 25, 21:24 UTC10m
2026-05-24 TWB664 TPE → TAE May 24, 19:50 UTCMay 24, 20:10 UTC20m
2026-05-24 TWB664 TPE → TAE May 24, 18:05 UTCMay 24, 18:25 UTC20m
2026-05-24 TWB663 TAE → TPE May 24, 15:35 UTCMay 24, 16:10 UTC35m
2026-05-24 TWB810 CJU → TAE May 24, 10:55 UTCMay 24, 11:10 UTC15m

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 HL8564 page for operator, model, and routing details .

Mode-S 71C564 frequently asked

What is Mode-S code 71C564?
71C564 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8564.
Where is Mode-S 71C564 registered?
Mode-S code 71C564 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 71C564 broadcasting right now?
Yes. Mode-S 71C564 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C564, octal 34342544, decimal 7,456,100.
What flights does 71C564 operate?
Mode-S 71C564 has broadcast 20 distinct callsigns, including TWB687, TWB810, TWB688, TWB901, TWB314.