Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
292
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S 71C564.

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 9 2026-07-22
TWB901 Tway Airlines 7 2026-07-23
TWB688 Tway Airlines 7 2026-07-20
TWB810 - 6 2026-07-12
TWB690 Tway Airlines 6 2026-07-21
TWB689 Tway Airlines 6 2026-07-21
TWB314 - 6 2026-07-16
TWB305 - 6 2026-07-16
TWB902 Tway Airlines 5 2026-07-23
TWB812 - 5 2026-07-21
TWB811 - 5 2026-07-21
TWB803 - 5 2026-07-21
TWB663 - 5 2026-07-18
TWB313 - 5 2026-07-13
TWB306 - 5 2026-07-13
TWB242 - 5 2026-07-16
TWB241 - 5 2026-07-15
TWB214 - 5 2026-07-17
TWB908 Tway Airlines 4 2026-07-20
TWB903 Tway Airlines 4 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TWB703 GMP → CJU Jul 26, 22:15 UTCJul 26, 22:45 UTC30m
2026-07-26 TWB734 - Jul 26, 12:10 UTCJul 26, 12:45 UTC35m
2026-07-26 TWB733 - Jul 26, 10:05 UTCJul 26, 10:35 UTC30m
2026-07-26 TWB652 KHH → GMP Jul 26, 07:45 UTCJul 26, 08:25 UTC40m
2026-07-26 TWB652 KHH → GMP Jul 26, 05:55 UTCJul 26, 06:40 UTC46m
2026-07-26 TWB651 GMP → KHH Jul 26, 02:05 UTCJul 26, 04:35 UTC2h 30m
2026-07-25 TWB922 PUS → GMP Jul 25, 21:45 UTCJul 25, 22:30 UTC45m
2026-07-25 TWB676 KHH → PUS Jul 25, 09:45 UTCJul 25, 12:00 UTC2h 15m
2026-07-25 TWB675 PUS → KHH Jul 25, 07:40 UTCJul 25, 08:25 UTC45m
2026-07-25 TWB675 PUS → KHH Jul 25, 06:10 UTCJul 25, 06:25 UTC15m
2026-07-24 TWB320 KIX → PUS Jul 24, 10:15 UTCJul 24, 11:30 UTC1h 15m
2026-07-24 TWB331 CJU → KIX Jul 24, 07:35 UTCJul 24, 08:35 UTC1h 0m
2026-07-24 TWB717 GMP → CJU Jul 24, 05:20 UTCJul 24, 05:55 UTC35m
2026-07-23 TWB736 - Jul 23, 12:55 UTCJul 23, 13:35 UTC40m
2026-07-23 TWB735 GMP → CJU Jul 23, 10:50 UTCJul 23, 11:25 UTC35m
2026-07-23 TWB728 CJU → GMP Jul 23, 09:00 UTCJul 23, 09:40 UTC40m
2026-07-23 TWB905 KWJ → CJU Jul 23, 06:30 UTCJul 23, 06:40 UTC10m
2026-07-23 TWB904 CJU → KWJ Jul 23, 05:20 UTCJul 23, 05:35 UTC15m
2026-07-23 TWB903 KWJ → CJU Jul 23, 03:15 UTCJul 23, 03:25 UTC10m
2026-07-23 TWB902 CJU → KWJ Jul 23, 02:00 UTCJul 23, 02:15 UTC15m
2026-07-23 TWB901 KWJ → CJU Jul 23, 00:00 UTCJul 23, 00:10 UTC10m
2026-07-22 TWB687 CJU → TPE Jul 22, 05:00 UTCJul 22, 05:25 UTC25m
2026-07-22 TWB807 TAE → CJU Jul 22, 01:15 UTCJul 22, 01:30 UTC15m
2026-07-21 TWB802 CJU → TAE Jul 21, 23:45 UTCJul 22, 00:00 UTC15m
2026-07-21 TWB803 - Jul 21, 21:45 UTCJul 21, 22:00 UTC15m
2026-07-21 TWB812 - Jul 21, 12:55 UTCJul 21, 13:15 UTC20m
2026-07-21 TWB811 - Jul 21, 10:55 UTCJul 21, 11:10 UTC15m
2026-07-21 TWB806 CJU → TAE Jul 21, 09:35 UTCJul 21, 10:00 UTC25m
2026-07-21 TWB690 KHH → CJU Jul 21, 05:45 UTCJul 21, 06:30 UTC45m
2026-07-21 TWB689 CJU → KHH Jul 21, 03:40 UTCJul 21, 04:25 UTC45m
2026-07-20 TWB901 KWJ → CJU Jul 20, 23:50 UTCJul 21, 00:05 UTC15m
2026-07-20 TWB908 CJU → KWJ Jul 20, 10:35 UTCJul 20, 10:45 UTC10m
2026-07-20 TWB688 TPE → CJU Jul 20, 06:30 UTCJul 20, 06:55 UTC25m
2026-07-20 TWB687 CJU → TPE Jul 20, 04:25 UTCJul 20, 04:55 UTC30m
2026-07-20 TWB807 - Jul 20, 01:15 UTCJul 20, 01:30 UTC15m
2026-07-19 TWB802 CJU → TAE Jul 19, 23:45 UTCJul 20, 00:10 UTC25m
2026-07-19 TWB803 - Jul 19, 21:40 UTCJul 19, 21:50 UTC10m
2026-07-19 TWB812 - Jul 19, 12:55 UTCJul 19, 13:20 UTC25m
2026-07-19 TWB811 - Jul 19, 10:50 UTCJul 19, 11:05 UTC15m
2026-07-19 TWB806 CJU → TAE Jul 19, 09:10 UTCJul 19, 09:40 UTC30m
2026-07-19 TWB725 - Jul 19, 06:35 UTCJul 19, 07:10 UTC35m
2026-07-19 TWB720 - Jul 19, 05:00 UTCJul 19, 05:35 UTC35m
2026-07-19 TWB228 FUK → CJU Jul 19, 01:45 UTCJul 19, 02:05 UTC20m
2026-07-18 TWB213 TAE → FUK Jul 18, 22:10 UTCJul 18, 22:30 UTC20m
2026-07-18 TWB664 - Jul 18, 18:15 UTCJul 18, 20:05 UTC1h 50m
2026-07-18 TWB663 - Jul 18, 15:25 UTCJul 18, 15:40 UTC15m
2026-07-18 TWB663 - Jul 18, 13:55 UTCJul 18, 14:20 UTC25m
2026-07-18 TWB808 - Jul 18, 09:55 UTCJul 18, 10:20 UTC25m
2026-07-18 TWB690 - Jul 18, 05:35 UTCJul 18, 06:15 UTC40m
2026-07-18 TWB689 - Jul 18, 03:30 UTCJul 18, 04:15 UTC45m

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?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
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, TWB901, TWB688, TWB810, TWB690.