Apparatus

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sensors Mode-S transponder

71C220

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

Currently assigned to HL8220 · BOEING 737-800

Hex
71C220
Octal
34341040
Decimal
7,455,264
Country
KR
Tail
HL8220
Type
B738
No current signal · last broadcast 2h ago
Flights observed
175
Distinct callsigns
20
Country
KR
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 71C220.

Country allocation

The ICAO 24-bit address 71C220 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
TWB264 Tway Airlines 10 2026-05-30
TWB263 Tway Airlines 10 2026-05-30
TWB671 Tway Airlines 6 2026-05-29
TWB287 Tway Airlines 6 2026-05-28
TWB672 Tway Airlines 5 2026-05-29
TWB288 Tway Airlines 5 2026-05-29
TWB908 Tway Airlines 4 2026-05-04
TWB901 Tway Airlines 4 2026-05-04
TWB667 Tway Airlines 4 2026-04-26
TWB643 Tway Airlines 4 2026-05-21
TWB242 Tway Airlines 4 2026-05-20
TWB241 Tway Airlines 4 2026-05-19
TWB903 Tway Airlines 3 2026-05-05
TWB902 Tway Airlines 3 2026-05-05
TWB718 Tway Airlines 3 2026-04-30
TWB701 Tway Airlines 3 2026-05-03
TWB644 Tway Airlines 3 2026-05-21
TWB314 Tway Airlines 3 2026-05-08
TWB034 Tway Airlines 3 2026-05-27
TWB907 Tway Airlines 2 2026-04-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 TWB033 ICN → CXR May 30, 10:45 UTCMay 30, 11:10 UTC25m
2026-05-30 TWB264 CTS → ICN May 30, 05:40 UTCMay 30, 08:30 UTC2h 50m
2026-05-30 TWB263 ICN → CTS May 30, 01:40 UTCMay 30, 03:40 UTC2h 0m
2026-05-29 TWB672 KHH → ICN May 29, 08:20 UTCMay 29, 10:45 UTC2h 25m
2026-05-29 TWB671 ICN → KHH May 29, 04:30 UTCMay 29, 07:05 UTC2h 35m
2026-05-29 TWB288 KMJ → ICN May 29, 01:40 UTCMay 29, 02:40 UTC1h 0m
2026-05-28 TWB287 ICN → KMJ May 28, 23:00 UTCMay 29, 00:00 UTC1h 0m
2026-05-28 TWB264 CTS → ICN May 28, 05:45 UTCMay 28, 08:25 UTC2h 40m
2026-05-28 TWB263 ICN → CTS May 28, 01:20 UTCMay 28, 03:35 UTC2h 15m
2026-05-27 TWB034 CXR → ICN May 27, 10:10 UTCMay 27, 21:15 UTC11h 5m
2026-05-27 TWB264 CTS → ICN May 27, 05:40 UTCMay 27, 08:15 UTC2h 35m
2026-05-27 TWB263 ICN → CTS May 27, 01:44 UTCMay 27, 04:04 UTC2h 20m
2026-05-26 TWB264 CTS → ICN May 26, 05:59 UTCMay 26, 08:30 UTC2h 30m
2026-05-26 TWB263 ICN → CTS May 26, 01:30 UTCMay 26, 03:50 UTC2h 20m
2026-05-25 TWB246 NRT → ICN May 25, 10:20 UTCMay 25, 12:15 UTC1h 55m
2026-05-25 TWB245 ICN → NRT May 25, 06:20 UTCMay 25, 08:15 UTC1h 55m
2026-05-24 TWB672 KHH → ICN May 24, 08:20 UTCMay 24, 10:55 UTC2h 35m
2026-05-24 TWB671 ICN → KHH May 24, 04:20 UTCMay 24, 06:55 UTC2h 35m
2026-05-24 TWB288 KMJ → ICN May 24, 01:35 UTCMay 24, 02:35 UTC1h 0m
2026-05-23 TWB287 ICN → KMJ May 23, 23:05 UTCMay 24, 00:05 UTC1h 0m
2026-05-23 TWB264 CTS → ICN May 23, 05:35 UTCMay 23, 08:10 UTC2h 35m
2026-05-23 TWB263 ICN → CTS May 23, 01:30 UTCMay 23, 03:45 UTC2h 15m
2026-05-22 TWB264 CTS → ICN May 22, 05:40 UTCMay 22, 08:05 UTC2h 25m
2026-05-22 TWB263 ICN → CTS May 22, 01:20 UTCMay 22, 03:40 UTC2h 20m
2026-05-21 TWB034 CXR → ICN May 21, 10:15 UTCMay 21, 21:45 UTC11h 30m
2026-05-21 TWB644 HKG → ICN May 21, 05:25 UTCMay 21, 08:30 UTC3h 5m
2026-05-21 TWB643 ICN → HKG May 21, 03:25 UTCMay 21, 03:40 UTC15m
2026-05-21 TWB643 ICN → HKG May 21, 00:30 UTCMay 21, 02:50 UTC2h 20m
2026-05-20 TWB208 FUK → ICN May 20, 11:45 UTCMay 20, 12:55 UTC1h 10m
2026-05-20 TWB207 ICN → FUK May 20, 09:30 UTCMay 20, 10:00 UTC30m
2026-05-20 TWB242 NRT → ICN May 20, 03:35 UTCMay 20, 05:40 UTC2h 6m
2026-05-19 TWB241 ICN → NRT May 19, 23:50 UTCMay 20, 01:45 UTC1h 55m
2026-05-19 TWB672 KHH → ICN May 19, 08:15 UTCMay 19, 10:50 UTC2h 35m
2026-05-19 TWB671 ICN → KHH May 19, 04:40 UTCMay 19, 07:10 UTC2h 30m
2026-05-19 TWB671 ICN → KHH May 19, 04:25 UTCMay 19, 04:30 UTC5m
2026-05-19 TWB288 KMJ → ICN May 19, 01:35 UTCMay 19, 02:35 UTC1h 0m
2026-05-18 TWB287 ICN → KMJ May 18, 23:10 UTCMay 19, 00:05 UTC55m
2026-05-18 TWB672 KHH → ICN May 18, 08:10 UTCMay 18, 10:45 UTC2h 35m
2026-05-18 TWB671 ICN → KHH May 18, 04:25 UTCMay 18, 06:50 UTC2h 25m
2026-05-18 TWB288 KMJ → ICN May 18, 01:40 UTCMay 18, 02:40 UTC1h 0m
2026-05-17 TWB287 ICN → KMJ May 17, 23:15 UTCMay 18, 00:20 UTC1h 5m
2026-05-17 TWB034 CXR → ICN May 17, 10:10 UTCMay 17, 21:40 UTC11h 30m
2026-05-17 TWB264 CTS → ICN May 17, 05:40 UTCMay 17, 08:00 UTC2h 20m
2026-05-17 TWB263 ICN → CTS May 17, 01:25 UTCMay 17, 03:50 UTC2h 25m
2026-05-16 TWB264 CTS → ICN May 16, 05:40 UTCMay 16, 07:55 UTC2h 16m
2026-05-16 TWB263 ICN → CTS May 16, 01:35 UTCMay 16, 04:00 UTC2h 25m
2026-05-14 TWB264 CTS → ICN May 14, 05:40 UTCMay 14, 07:50 UTC2h 10m
2026-05-14 TWB263 ICN → CTS May 14, 01:25 UTCMay 14, 03:55 UTC2h 30m
2026-05-13 TWB644 HKG → ICN May 13, 05:25 UTCMay 13, 08:45 UTC3h 20m
2026-05-13 TWB643 ICN → HKG May 13, 00:00 UTCMay 13, 03:10 UTC3h 10m

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 HL8220 page for operator, model, and routing details .

Mode-S 71C220 frequently asked

What is Mode-S code 71C220?
71C220 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8220.
Where is Mode-S 71C220 registered?
Mode-S code 71C220 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 71C220 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 71C220, octal 34341040, decimal 7,455,264.
What flights does 71C220 operate?
Mode-S 71C220 has broadcast 20 distinct callsigns, including TWB264, TWB263, TWB671, TWB287, TWB672.