Apparatus

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sensors Mode-S transponder

71C070

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

Currently assigned to HL8070 · BOEING 737-800

Hex
71C070
Octal
34340160
Decimal
7,454,832
Country
KR
Tail
HL8070
Type
B738
No current signal · last broadcast 14h ago
Flights observed
184
Distinct callsigns
20
Country
KR
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S 71C070.

Country allocation

The ICAO 24-bit address 71C070 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
TWB675 Tway Airlines 9 2026-04-25
TWB256 Tway Airlines 7 2026-04-25
TWB255 Tway Airlines 7 2026-04-24
TWB688 Tway Airlines 4 2026-05-27
TWB687 Tway Airlines 4 2026-05-27
TWB676 Tway Airlines 4 2026-04-25
TWB667 Tway Airlines 4 2026-04-27
TWB639 Tway Airlines 4 2026-04-21
TWB322 Tway Airlines 4 2026-05-29
TWB717 Tway Airlines 3 2026-05-28
TWB715 Tway Airlines 3 2026-05-22
TWB710 Tway Airlines 3 2026-05-22
TWB331 Tway Airlines 3 2026-05-28
TWB321 Tway Airlines 3 2026-05-29
TWB320 Tway Airlines 3 2026-05-28
TWB304 Tway Airlines 3 2026-05-10
TWB303 Tway Airlines 3 2026-05-10
TWB252 Tway Airlines 3 2026-05-23
TWB241 Tway Airlines 3 2026-05-06
TWB208 Tway Airlines 3 2026-05-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 TWB236 FUK → PUS May 29, 11:05 UTCMay 29, 11:15 UTC10m
2026-05-29 TWB322 KIX → PUS May 29, 06:45 UTCMay 29, 07:20 UTC35m
2026-05-29 TWB321 PUS → KIX May 29, 04:30 UTCMay 29, 05:05 UTC35m
2026-05-28 TWB320 KIX → PUS May 28, 10:15 UTCMay 28, 10:50 UTC35m
2026-05-28 TWB331 CJU → KIX May 28, 08:00 UTCMay 28, 08:50 UTC50m
2026-05-28 TWB717 GMP → CJU May 28, 05:15 UTCMay 28, 05:45 UTC30m
2026-05-28 TWB718 CJU → GMP May 28, 03:40 UTCMay 28, 04:15 UTC35m
2026-05-28 TWB807 TAE → CJU May 28, 01:25 UTCMay 28, 01:35 UTC10m
2026-05-27 TWB808 CJU → TAE May 27, 10:10 UTCMay 27, 10:25 UTC15m
2026-05-27 TWB688 TPE → CJU May 27, 06:40 UTCMay 27, 07:05 UTC25m
2026-05-27 TWB687 CJU → TPE May 27, 04:34 UTCMay 27, 04:59 UTC25m
2026-05-27 TWB707 GMP → CJU May 27, 01:14 UTCMay 27, 01:39 UTC25m
2026-05-26 TWB926 PUS → GMP May 26, 07:55 UTCMay 26, 08:24 UTC30m
2026-05-26 TWB925 GMP → PUS May 26, 05:59 UTCMay 26, 06:29 UTC30m
2026-05-26 TWB924 PUS → GMP May 26, 04:10 UTCMay 26, 04:39 UTC30m
2026-05-26 TWB923 GMP → PUS May 26, 02:04 UTCMay 26, 02:29 UTC25m
2026-05-26 TWB706 - May 26, 00:24 UTCMay 26, 00:49 UTC25m
2026-05-25 TWB703 GMP → CJU May 25, 22:05 UTCMay 25, 22:34 UTC30m
2026-05-25 TWB736 - May 25, 12:40 UTCMay 25, 13:05 UTC25m
2026-05-25 TWB735 GMP → CJU May 25, 10:15 UTCMay 25, 10:40 UTC25m
2026-05-25 TWB728 CJU → GMP May 25, 08:35 UTCMay 25, 09:10 UTC35m
2026-05-24 TWB688 TPE → CJU May 24, 07:10 UTCMay 24, 07:30 UTC20m
2026-05-24 TWB687 CJU → TPE May 24, 04:40 UTCMay 24, 05:10 UTC30m
2026-05-24 TWB802 CJU → TAE May 24, 00:05 UTCMay 24, 00:15 UTC10m
2026-05-23 TWB216 NRT → ICN May 23, 10:40 UTCMay 23, 11:20 UTC40m
2026-05-23 TWB252 NRT → TAE May 23, 06:45 UTCMay 23, 06:55 UTC10m
2026-05-23 TWB252 NRT → TAE May 23, 05:10 UTCMay 23, 06:10 UTC1h 0m
2026-05-23 TWB251 TAE → NRT May 23, 02:10 UTCMay 23, 03:20 UTC1h 9m
2026-05-22 TWB808 CJU → TAE May 22, 10:10 UTCMay 22, 10:25 UTC15m
2026-05-22 TWB715 GMP → CJU May 22, 04:15 UTCMay 22, 04:45 UTC30m
2026-05-22 TWB710 CJU → GMP May 22, 02:15 UTCMay 22, 02:50 UTC35m
2026-05-21 TWB812 - May 21, 13:15 UTCMay 21, 13:30 UTC15m
2026-05-21 TWB806 CJU → TAE May 21, 09:35 UTCMay 21, 09:50 UTC15m
2026-05-21 TWB725 - May 21, 06:55 UTCMay 21, 07:20 UTC25m
2026-05-21 TWB720 CJU → GMP May 21, 05:15 UTCMay 21, 05:55 UTC40m
2026-05-20 TWB688 TPE → CJU May 20, 06:50 UTCMay 20, 07:10 UTC20m
2026-05-20 TWB687 CJU → TPE May 20, 04:50 UTCMay 20, 05:25 UTC35m
2026-05-19 TWB701 GMP → CJU May 19, 21:45 UTCMay 19, 22:10 UTC25m
2026-05-18 TWB736 - May 18, 12:40 UTCMay 18, 13:10 UTC30m
2026-05-18 TWB735 GMP → CJU May 18, 10:15 UTCMay 18, 10:40 UTC25m
2026-05-18 TWB728 CJU → GMP May 18, 08:45 UTCMay 18, 09:15 UTC30m
2026-05-18 TWB707 GMP → CJU May 18, 01:10 UTCMay 18, 01:40 UTC30m
2026-05-17 TWB702 CJU → GMP May 17, 23:25 UTCMay 18, 00:05 UTC40m
2026-05-17 TWB715 GMP → CJU May 17, 04:15 UTCMay 17, 04:45 UTC30m
2026-05-17 TWB710 CJU → GMP May 17, 02:10 UTCMay 17, 02:45 UTC35m
2026-05-16 TWB843 CJJ → CJU May 16, 23:50 UTCMay 17, 00:05 UTC15m
2026-05-16 TWB850 - May 16, 13:21 UTCMay 16, 13:46 UTC25m
2026-05-16 TWB849 - May 16, 11:16 UTCMay 16, 11:31 UTC15m
2026-05-16 TWB844 CJU → CJJ May 16, 09:35 UTCMay 16, 10:01 UTC25m
2026-05-16 TWB715 GMP → CJU May 16, 04:15 UTCMay 16, 04:40 UTC25m

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 HL8070 page for operator, model, and routing details .

Mode-S 71C070 frequently asked

What is Mode-S code 71C070?
71C070 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8070.
Where is Mode-S 71C070 registered?
Mode-S code 71C070 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 71C070 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C070, octal 34340160, decimal 7,454,832.
What flights does 71C070 operate?
Mode-S 71C070 has broadcast 20 distinct callsigns, including TWB675, TWB256, TWB255, TWB688, TWB687.