Apparatus

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sensors Mode-S transponder

71C098

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

Currently assigned to HL8098 · BOEING 737-800

Hex
71C098
Octal
34340230
Decimal
7,454,872
Country
KR
Tail
HL8098
Type
B738
No current signal · last broadcast 32m ago
Flights observed
153
Distinct callsigns
20
Country
KR
Last broadcast
32m ago

Last known position

Most recent position reported by Mode-S 71C098.

Country allocation

The ICAO 24-bit address 71C098 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
TWB664 Tway Airlines 5 2026-05-20
TWB663 Tway Airlines 5 2026-05-20
TWB312 Tway Airlines 5 2026-05-20
TWB311 Tway Airlines 5 2026-05-19
TWB720 Tway Airlines 4 2026-05-22
TWB715 Tway Airlines 4 2026-05-23
TWB126 Tway Airlines 4 2026-05-15
TWB125 Tway Airlines 4 2026-05-14
TWB725 - 3 2026-05-22
TWB717 Tway Airlines 3 2026-05-05
TWB710 Tway Airlines 3 2026-05-23
TWB331 Tway Airlines 3 2026-05-05
TWB314 Tway Airlines 3 2026-05-11
TWB306 Tway Airlines 3 2026-05-24
TWB305 Tway Airlines 3 2026-05-11
TWB263 Tway Airlines 3 2026-05-09
TWB242 Tway Airlines 3 2026-05-30
TWB013 Tway Airlines 3 2026-05-17
TWB907 Tway Airlines 2 2026-04-19
TWB906 Tway Airlines 2 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 TWB242 NRT → ICN May 30, 03:30 UTCMay 30, 05:55 UTC2h 25m
2026-05-29 TWB241 ICN → NRT May 29, 23:45 UTCMay 30, 01:30 UTC1h 45m
2026-05-24 TWB306 KIX → ICN May 24, 10:45 UTCMay 24, 12:10 UTC1h 25m
2026-05-24 TWB313 TAE → KIX May 24, 08:10 UTCMay 24, 08:55 UTC45m
2026-05-24 TWB214 FUK → TAE May 24, 05:50 UTCMay 24, 06:30 UTC40m
2026-05-23 TWB424 UBN → TAE May 23, 13:10 UTCMay 23, 21:10 UTC8h 1m
2026-05-23 TWB808 CJU → TAE May 23, 10:05 UTCMay 23, 10:15 UTC10m
2026-05-23 TWB715 GMP → CJU May 23, 04:20 UTCMay 23, 04:45 UTC25m
2026-05-23 TWB710 CJU → GMP May 23, 02:05 UTCMay 23, 02:40 UTC34m
2026-05-22 TWB812 - May 22, 13:25 UTCMay 22, 13:35 UTC10m
2026-05-22 TWB806 CJU → TAE May 22, 09:45 UTCMay 22, 10:00 UTC15m
2026-05-22 TWB725 - May 22, 07:20 UTCMay 22, 07:40 UTC20m
2026-05-22 TWB720 CJU → GMP May 22, 05:30 UTCMay 22, 06:10 UTC40m
2026-05-20 TWB664 TPE → TAE May 20, 19:50 UTCMay 20, 20:05 UTC15m
2026-05-20 TWB664 TPE → TAE May 20, 18:10 UTCMay 20, 18:30 UTC20m
2026-05-20 TWB663 TAE → TPE May 20, 15:40 UTCMay 20, 16:05 UTC25m
2026-05-20 TWB663 TAE → TPE May 20, 14:00 UTCMay 20, 14:10 UTC10m
2026-05-20 TWB352 - May 20, 09:40 UTCMay 20, 09:50 UTC10m
2026-05-20 TWB352 - May 20, 08:35 UTCMay 20, 09:05 UTC30m
2026-05-20 TWB351 TAE → TOY May 20, 06:30 UTCMay 20, 06:55 UTC25m
2026-05-20 TWB312 KIX → TAE May 20, 01:55 UTCMay 20, 03:00 UTC1h 5m
2026-05-19 TWB311 TAE → KIX May 19, 23:25 UTCMay 20, 00:05 UTC40m
2026-05-19 TWB683 TAE → YNJ May 19, 02:20 UTCMay 19, 08:05 UTC5h 45m
2026-05-18 TWB681 TAE → DYG May 18, 02:10 UTCMay 18, 02:20 UTC10m
2026-05-17 TWB030 DAD → TAE May 17, 22:35 UTCMay 17, 22:45 UTC10m
2026-05-17 TWB013 ICN → DAD May 17, 13:01 UTCMay 17, 21:05 UTC8h 5m
2026-05-17 TWB244 NRT → ICN May 17, 05:45 UTCMay 17, 07:30 UTC1h 45m
2026-05-17 TWB243 ICN → NRT May 17, 01:40 UTCMay 17, 03:50 UTC2h 10m
2026-05-16 TWB102 BKK → ICN May 16, 17:25 UTCMay 16, 22:35 UTC5h 10m
2026-05-16 TWB101 ICN → BKK May 16, 09:10 UTCMay 16, 14:25 UTC5h 15m
2026-05-16 TWB304 KIX → ICN May 16, 05:56 UTCMay 16, 07:20 UTC1h 25m
2026-05-16 TWB303 ICN → KIX May 16, 02:15 UTCMay 16, 03:50 UTC1h 35m
2026-05-15 TWB126 KLO → ICN May 15, 05:25 UTCMay 15, 09:15 UTC3h 50m
2026-05-14 TWB125 ICN → KLO May 14, 23:55 UTCMay 15, 03:50 UTC3h 55m
2026-05-14 TWB306 KIX → ICN May 14, 10:45 UTCMay 14, 12:05 UTC1h 20m
2026-05-14 TWB313 TAE → KIX May 14, 08:20 UTCMay 14, 09:10 UTC50m
2026-05-14 TWB312 KIX → TAE May 14, 02:00 UTCMay 14, 03:05 UTC1h 5m
2026-05-13 TWB311 TAE → KIX May 13, 23:20 UTCMay 14, 00:05 UTC45m
2026-05-13 TWB312 KIX → TAE May 13, 02:05 UTCMay 13, 02:35 UTC30m
2026-05-12 TWB311 TAE → KIX May 12, 23:30 UTCMay 13, 00:15 UTC45m
2026-05-12 TWB664 TPE → TAE May 12, 18:10 UTCMay 12, 20:01 UTC1h 50m
2026-05-12 TWB663 TAE → TPE May 12, 14:10 UTCMay 12, 16:05 UTC1h 55m
2026-05-12 TWB252 NRT → TAE May 12, 05:05 UTCMay 12, 06:10 UTC1h 5m
2026-05-11 TWB314 KIX → TAE May 11, 10:40 UTCMay 12, 03:25 UTC16h 46m
2026-05-11 TWB305 ICN → KIX May 11, 07:10 UTCMay 11, 08:35 UTC1h 25m
2026-05-10 TWB126 KLO → ICN May 10, 05:25 UTCMay 10, 09:10 UTC3h 45m
2026-05-09 TWB125 ICN → KLO May 9, 23:55 UTCMay 10, 03:30 UTC3h 35m
2026-05-09 TWB034 CXR → ICN May 9, 10:35 UTCMay 9, 21:55 UTC11h 20m
2026-05-09 TWB264 CTS → ICN May 9, 05:40 UTCMay 9, 08:20 UTC2h 40m
2026-05-09 TWB263 ICN → CTS May 9, 01:20 UTCMay 9, 03:20 UTC2h 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 HL8098 page for operator, model, and routing details .

Mode-S 71C098 frequently asked

What is Mode-S code 71C098?
71C098 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8098.
Where is Mode-S 71C098 registered?
Mode-S code 71C098 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 71C098 broadcasting right now?
No active broadcast right now. Last signal was 32m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C098, octal 34340230, decimal 7,454,872.
What flights does 71C098 operate?
Mode-S 71C098 has broadcast 20 distinct callsigns, including TWB664, TWB663, TWB312, TWB311, TWB720.