Apparatus

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sensors Mode-S transponder

71C212

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

Currently assigned to HL8212 · AIRBUS A-330-200

Hex
71C212
Octal
34341022
Decimal
7,455,250
Country
KR
Tail
HL8212
Type
A332
No current signal · last broadcast 1h ago
Flights observed
73
Distinct callsigns
8
Country
KR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 71C212.

Country allocation

The ICAO 24-bit address 71C212 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 8 distinct

Callsign Airline Flights Last seen
TWB403 Tway Airlines 15 2026-05-27
TWB406 Tway Airlines 13 2026-05-25
TWB404 Tway Airlines 13 2026-05-28
TWB405 Tway Airlines 9 2026-05-24
TWB407 Tway Airlines 8 2026-05-29
TWB408 Tway Airlines 5 2026-05-29
TWB402 Tway Airlines 5 2026-04-26
TWB401 Tway Airlines 5 2026-04-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 TWB408 BCN → ICN May 29, 20:10 UTCMay 30, 00:30 UTC4h 20m
2026-05-29 TWB407 ICN → BCN May 29, 04:20 UTCMay 29, 17:35 UTC13h 15m
2026-05-29 TWB407 ICN → BCN May 29, 02:55 UTCMay 29, 03:15 UTC20m
2026-05-28 TWB404 FRA → ICN May 28, 03:55 UTCMay 28, 04:20 UTC25m
2026-05-27 TWB404 FRA → ICN May 27, 17:10 UTCMay 28, 03:15 UTC10h 5m
2026-05-27 TWB403 ICN → FRA May 27, 02:39 UTCMay 27, 15:05 UTC12h 25m
2026-05-27 TWB403 ICN → FRA May 27, 01:19 UTCMay 27, 01:34 UTC15m
2026-05-25 TWB406 FCO → ICN May 25, 06:35 UTCMay 25, 06:40 UTC5m
2026-05-25 TWB406 FCO → ICN May 25, 06:20 UTCMay 25, 06:30 UTC10m
2026-05-24 TWB406 FCO → ICN May 24, 19:35 UTCMay 24, 23:15 UTC3h 40m
2026-05-24 TWB405 ICN → FCO May 24, 09:30 UTCMay 24, 16:35 UTC7h 5m
2026-05-24 TWB405 ICN → FCO May 24, 04:00 UTCMay 24, 04:15 UTC15m
2026-05-23 TWB404 FRA → ICN May 23, 04:25 UTCMay 23, 04:45 UTC20m
2026-05-22 TWB404 FRA → ICN May 22, 17:20 UTCMay 22, 19:40 UTC2h 20m
2026-05-22 TWB403 ICN → FRA May 22, 02:40 UTCMay 22, 14:40 UTC12h 0m
2026-05-22 TWB403 ICN → FRA May 22, 01:20 UTCMay 22, 01:40 UTC20m
2026-05-19 TWB406 FCO → ICN May 19, 06:20 UTCMay 19, 06:40 UTC20m
2026-05-18 TWB406 FCO → ICN May 18, 19:40 UTCMay 19, 05:35 UTC9h 55m
2026-05-18 TWB405 ICN → FCO May 18, 05:05 UTCMay 18, 16:55 UTC11h 50m
2026-05-18 TWB405 ICN → FCO May 18, 03:50 UTCMay 18, 04:05 UTC15m
2026-05-16 TWB408 BCN → ICN May 16, 07:05 UTCMay 16, 07:31 UTC25m
2026-05-15 TWB408 BCN → ICN May 15, 19:30 UTCMay 16, 00:05 UTC4h 35m
2026-05-15 TWB407 ICN → BCN May 15, 08:20 UTCMay 15, 16:50 UTC8h 29m
2026-05-15 TWB407 ICN → BCN May 15, 02:50 UTCMay 15, 03:05 UTC15m
2026-05-11 TWB404 FRA → ICN May 11, 17:10 UTCMay 11, 19:25 UTC2h 15m
2026-05-11 TWB403 ICN → FRA May 11, 06:40 UTCMay 11, 14:40 UTC8h 0m
2026-05-11 TWB403 ICN → FRA May 11, 01:25 UTCMay 11, 01:40 UTC15m
2026-05-08 TWB404 FRA → ICN May 8, 17:25 UTCMay 9, 04:45 UTC11h 20m
2026-05-08 TWB403 ICN → FRA May 8, 02:24 UTCMay 8, 14:35 UTC12h 10m
2026-05-08 TWB403 ICN → FRA May 8, 01:04 UTCMay 8, 01:14 UTC10m
2026-05-06 TWB404 FRA → ICN May 6, 17:15 UTCMay 7, 03:30 UTC10h 14m
2026-05-06 TWB403 ICN → FRA May 6, 02:30 UTCMay 6, 14:40 UTC12h 10m
2026-05-06 TWB403 ICN → FRA May 6, 01:10 UTCMay 6, 01:25 UTC15m
2026-05-04 TWB404 FRA → ICN May 4, 04:24 UTCMay 4, 04:39 UTC15m
2026-05-03 TWB404 FRA → ICN May 3, 17:00 UTCMay 4, 03:24 UTC10h 25m
2026-05-03 TWB403 ICN → FRA May 3, 02:35 UTCMay 3, 14:25 UTC11h 49m
2026-05-03 TWB403 ICN → FRA May 3, 01:15 UTCMay 3, 01:25 UTC10m
2026-05-02 TWB406 FCO → ICN May 2, 06:45 UTCMay 2, 06:55 UTC10m
2026-05-01 TWB406 FCO → ICN May 1, 19:50 UTCMay 2, 05:50 UTC10h 0m
2026-05-01 TWB405 ICN → FCO May 1, 04:10 UTCMay 1, 17:05 UTC12h 55m
2026-04-26 TWB402 CDG → ICN Apr 26, 06:15 UTCApr 26, 06:30 UTC15m
2026-04-25 TWB402 CDG → ICN Apr 25, 18:55 UTCApr 26, 05:10 UTC10h 15m
2026-04-25 TWB401 ICN → CDG Apr 25, 07:15 UTCApr 25, 16:10 UTC8h 55m
2026-04-25 TWB401 ICN → CDG Apr 25, 01:40 UTCApr 25, 01:55 UTC15m
2026-04-24 TWB404 FRA → ICN Apr 24, 04:30 UTCApr 24, 04:40 UTC10m
2026-04-23 TWB404 FRA → ICN Apr 23, 17:15 UTCApr 24, 03:35 UTC10h 19m
2026-04-23 TWB403 ICN → FRA Apr 23, 10:05 UTCApr 23, 14:25 UTC4h 20m
2026-04-23 TWB403 ICN → FRA Apr 23, 01:20 UTCApr 23, 01:35 UTC15m
2026-04-22 TWB404 FRA → ICN Apr 22, 04:00 UTCApr 22, 04:15 UTC15m
2026-04-21 TWB404 FRA → ICN Apr 21, 17:05 UTCApr 22, 03:10 UTC10h 5m

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 HL8212 page for operator, model, and routing details .

Mode-S 71C212 frequently asked

What is Mode-S code 71C212?
71C212 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8212.
Where is Mode-S 71C212 registered?
Mode-S code 71C212 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 71C212 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C212, octal 34341022, decimal 7,455,250.
What flights does 71C212 operate?
Mode-S 71C212 has broadcast 8 distinct callsigns, including TWB403, TWB406, TWB404, TWB405, TWB407.