Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C561

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

Currently assigned to HL8561 · AIRBUS A-330-300

Hex
71C561
Octal
34342541
Decimal
7,456,097
Country
KR
Tail
HL8561
Type
A333
No current signal · last broadcast Jul 26, 22:10 UTC
Flights observed
141
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 22:10 UTC

Last known position

Most recent position reported by Mode-S 71C561.

Country allocation

The ICAO 24-bit address 71C561 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 Tway Airlines 26 2026-07-26
TWB161 Tway Airlines 25 2026-07-26
TWB643 Tway Airlines 13 2026-05-05
TWB532 Tway Airlines 11 2026-05-06
TWB644 Tway Airlines 10 2026-05-05
TWB531 Tway Airlines 9 2026-05-05
TWB155 Tway Airlines 8 2026-07-25
TWB264 - 6 2026-07-12
TWB263 - 6 2026-07-12
TWB156 Tway Airlines 5 2026-07-25
TWB502 - 3 2026-07-07
TWB501 - 3 2026-07-06
TWB614 - 2 2026-07-16
TWB613 - 2 2026-07-15
TWB422 - 2 2026-07-01
TWB421 - 2 2026-07-01
TWB302 Tway Airlines 1 2026-05-04
TWB301 Tway Airlines 1 2026-05-03
TWB206 Tway Airlines 1 2026-06-14
TWB205 - 1 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TWB162 SIN → ICN Jul 26, 19:00 UTCJul 26, 22:10 UTC3h 10m
2026-07-26 TWB161 ICN → SIN Jul 26, 12:45 UTCJul 26, 12:55 UTC10m
2026-07-26 TWB161 ICN → SIN Jul 26, 07:15 UTCJul 26, 09:55 UTC2h 40m
2026-07-26 TWB202 NRT → TAE Jul 26, 03:55 UTCJul 26, 04:55 UTC1h 0m
2026-07-26 TWB201 ICN → FUK Jul 26, 01:25 UTCJul 26, 02:20 UTC55m
2026-07-25 TWB156 CGK → ICN Jul 25, 16:55 UTCJul 25, 22:10 UTC5h 15m
2026-07-25 TWB155 ICN → CGK Jul 25, 12:40 UTCJul 25, 12:55 UTC15m
2026-07-25 TWB155 ICN → CGK Jul 25, 06:30 UTCJul 25, 11:15 UTC4h 45m
2026-07-21 TWB162 SIN → ICN Jul 21, 18:20 UTCJul 21, 21:25 UTC3h 5m
2026-07-21 TWB161 ICN → SIN Jul 21, 12:45 UTCJul 21, 13:00 UTC15m
2026-07-21 TWB161 ICN → SIN Jul 21, 07:20 UTCJul 21, 10:00 UTC2h 40m
2026-07-18 TWB162 SIN → ICN Jul 18, 18:40 UTCJul 18, 21:45 UTC3h 5m
2026-07-18 TWB162 SIN → ICN Jul 18, 15:35 UTCJul 18, 15:45 UTC10m
2026-07-18 TWB161 - Jul 18, 07:15 UTCJul 18, 13:15 UTC6h 0m
2026-07-16 TWB162 - Jul 16, 19:14 UTCJul 16, 22:19 UTC3h 5m
2026-07-16 TWB162 - Jul 16, 16:09 UTCJul 16, 16:19 UTC10m
2026-07-16 TWB161 - Jul 16, 12:40 UTCJul 16, 12:49 UTC10m
2026-07-16 TWB161 - Jul 16, 07:15 UTCJul 16, 10:00 UTC2h 45m
2026-07-16 TWB614 - Jul 16, 03:45 UTCJul 16, 04:10 UTC25m
2026-07-15 TWB613 - Jul 15, 23:30 UTCJul 15, 23:55 UTC25m
2026-07-13 TWB156 - Jul 13, 16:50 UTCJul 13, 22:20 UTC5h 30m
2026-07-13 TWB155 - Jul 13, 13:10 UTCJul 13, 13:25 UTC15m
2026-07-13 TWB155 - Jul 13, 07:05 UTCJul 13, 11:50 UTC4h 45m
2026-07-12 TWB264 - Jul 12, 05:50 UTCJul 12, 08:05 UTC2h 15m
2026-07-12 TWB263 ICN → CTS Jul 12, 01:25 UTCJul 12, 03:50 UTC2h 25m
2026-07-11 TWB264 - Jul 11, 05:40 UTCJul 11, 08:05 UTC2h 25m
2026-07-11 TWB263 - Jul 11, 01:25 UTCJul 11, 03:45 UTC2h 20m
2026-07-07 TWB502 SYD → ICN Jul 7, 02:05 UTCJul 7, 13:00 UTC10h 55m
2026-07-06 TWB501 ICN → SYD Jul 6, 13:35 UTCJul 6, 23:25 UTC9h 50m
2026-07-06 TWB264 - Jul 6, 05:55 UTCJul 6, 08:25 UTC2h 30m
2026-07-06 TWB263 ICN → CTS Jul 6, 01:30 UTCJul 6, 03:45 UTC2h 15m
2026-07-04 TWB264 - Jul 4, 05:45 UTCJul 4, 08:00 UTC2h 15m
2026-07-04 TWB263 - Jul 4, 01:30 UTCJul 4, 03:35 UTC2h 5m
2026-07-03 TWB156 - Jul 3, 16:45 UTCJul 3, 22:00 UTC5h 15m
2026-07-03 TWB155 - Jul 3, 12:50 UTCJul 3, 13:05 UTC15m
2026-07-03 TWB155 - Jul 3, 06:35 UTCJul 3, 11:30 UTC4h 55m
2026-07-03 TWB614 - Jul 3, 03:50 UTCJul 3, 04:05 UTC15m
2026-07-02 TWB613 - Jul 2, 23:35 UTCJul 3, 00:00 UTC25m
2026-07-01 TWB422 - Jul 1, 09:20 UTCJul 1, 09:45 UTC25m
2026-07-01 TWB421 - Jul 1, 02:15 UTCJul 1, 03:50 UTC1h 35m
2026-06-25 TWB502 SYD → ICN Jun 25, 02:14 UTCJun 25, 12:40 UTC10h 25m
2026-06-24 TWB501 - Jun 24, 13:20 UTCJun 24, 23:00 UTC9h 40m
2026-06-24 TWB264 - Jun 24, 05:49 UTCJun 24, 08:35 UTC2h 45m
2026-06-24 TWB263 ICN → CTS Jun 24, 01:30 UTCJun 24, 03:50 UTC2h 20m
2026-06-22 TWB162 - Jun 22, 18:19 UTCJun 22, 21:19 UTC3h 0m
2026-06-22 TWB161 - Jun 22, 07:10 UTCJun 22, 12:59 UTC5h 50m
2026-06-21 TWB422 UBN → ICN Jun 21, 09:15 UTCJun 21, 09:40 UTC25m
2026-06-21 TWB421 ICN → UBN Jun 21, 02:15 UTCJun 21, 03:55 UTC1h 40m
2026-06-20 TWB162 - Jun 20, 18:29 UTCJun 20, 21:34 UTC3h 5m
2026-06-20 TWB162 - Jun 20, 15:34 UTCJun 20, 15:44 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 HL8561 page for operator, model, and routing details .

Mode-S 71C561 frequently asked

What is Mode-S code 71C561?
71C561 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8561.
Where is Mode-S 71C561 registered?
Mode-S code 71C561 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 71C561 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C561, octal 34342541, decimal 7,456,097.
What flights does 71C561 operate?
Mode-S 71C561 has broadcast 20 distinct callsigns, including TWB162, TWB161, TWB643, TWB532, TWB644.