Apparatus

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sensors Mode-S transponder

71C513

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

Currently assigned to HL8513 · BOEING 737 MAX 8

Hex
71C513
Octal
34342423
Decimal
7,456,019
Country
KR
Tail
HL8513
Type
B38M
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
296
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S 71C513.

Country allocation

The ICAO 24-bit address 71C513 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
TWB007 - 22 2026-07-25
TWB282 Tway Airlines 19 2026-07-25
TWB008 - 19 2026-07-14
TWB304 - 17 2026-07-18
TWB303 - 17 2026-07-18
TWB205 Tway Airlines 17 2026-07-21
TWB206 Tway Airlines 16 2026-07-21
TWB281 Tway Airlines 13 2026-07-25
TWB245 - 13 2026-07-07
TWB202 - 13 2026-07-09
TWB201 - 13 2026-07-09
TWB246 - 12 2026-07-07
TWB302 Tway Airlines 10 2026-07-22
TWB301 Tway Airlines 9 2026-07-21
TWB055 Tway Airlines 9 2026-07-26
TWB208 Tway Airlines 8 2026-07-23
TWB207 Tway Airlines 8 2026-07-23
TWB013 - 7 2026-07-12
TWB034 - 6 2026-07-14
TWB102 Tway Airlines 5 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TWB055 ICN → PQC Jul 26, 11:15 UTCJul 26, 22:45 UTC11h 30m
2026-07-25 TWB007 - Jul 25, 23:20 UTCJul 26, 09:10 UTC9h 51m
2026-07-25 TWB248 NRT → ICN Jul 25, 13:10 UTCJul 25, 15:05 UTC1h 55m
2026-07-25 TWB247 ICN → NRT Jul 25, 09:30 UTCJul 25, 11:35 UTC2h 5m
2026-07-25 TWB282 OKA → ICN Jul 25, 07:00 UTCJul 25, 07:45 UTC45m
2026-07-25 TWB282 OKA → ICN Jul 25, 05:50 UTCJul 25, 06:00 UTC10m
2026-07-25 TWB281 ICN → OKA Jul 25, 02:20 UTCJul 25, 04:00 UTC1h 40m
2026-07-24 TWB102 BKK → ICN Jul 24, 18:05 UTCJul 24, 23:15 UTC5h 10m
2026-07-24 TWB101 ICN → BKK Jul 24, 10:45 UTCJul 24, 15:50 UTC5h 5m
2026-07-23 TWB007 - Jul 23, 23:15 UTCJul 24, 09:00 UTC9h 45m
2026-07-23 TWB208 FUK → ICN Jul 23, 11:45 UTCJul 23, 12:45 UTC1h 0m
2026-07-23 TWB207 ICN → FUK Jul 23, 09:15 UTCJul 23, 10:00 UTC45m
2026-07-23 TWB244 NRT → ICN Jul 23, 05:40 UTCJul 23, 07:40 UTC2h 0m
2026-07-23 TWB243 ICN → NRT Jul 23, 01:45 UTCJul 23, 03:45 UTC2h 0m
2026-07-22 TWB308 KIX → ICN Jul 22, 15:30 UTCJul 22, 16:50 UTC1h 20m
2026-07-22 TWB307 ICN → KIX Jul 22, 12:20 UTCJul 22, 13:50 UTC1h 30m
2026-07-22 TWB302 KIX → ICN Jul 22, 03:30 UTCJul 22, 04:55 UTC1h 25m
2026-07-21 TWB301 ICN → KIX Jul 21, 23:25 UTCJul 22, 00:55 UTC1h 30m
2026-07-21 TWB308 KIX → ICN Jul 21, 15:30 UTCJul 21, 16:45 UTC1h 15m
2026-07-21 TWB307 ICN → KIX Jul 21, 12:25 UTCJul 21, 13:50 UTC1h 25m
2026-07-21 TWB206 FUK → ICN Jul 21, 08:55 UTCJul 21, 09:45 UTC50m
2026-07-21 TWB205 ICN → FUK Jul 21, 06:15 UTCJul 21, 07:05 UTC50m
2026-07-20 TWB308 KIX → ICN Jul 20, 15:30 UTCJul 20, 16:50 UTC1h 20m
2026-07-20 TWB307 ICN → KIX Jul 20, 12:20 UTCJul 20, 13:45 UTC1h 25m
2026-07-20 TWB206 FUK → ICN Jul 20, 08:45 UTCJul 20, 09:45 UTC1h 0m
2026-07-20 TWB205 ICN → FUK Jul 20, 06:20 UTCJul 20, 07:20 UTC1h 0m
2026-07-18 TWB007 ICN → ICN Jul 18, 23:20 UTCJul 19, 09:00 UTC9h 40m
2026-07-18 TWB208 - Jul 18, 11:45 UTCJul 18, 12:50 UTC1h 5m
2026-07-18 TWB207 - Jul 18, 09:15 UTCJul 18, 10:00 UTC45m
2026-07-18 TWB304 KIX → ICN Jul 18, 06:10 UTCJul 18, 07:30 UTC1h 20m
2026-07-18 TWB303 ICN → KIX Jul 18, 02:05 UTCJul 18, 03:40 UTC1h 36m
2026-07-17 TWB033 ICN → ICN Jul 17, 10:55 UTCJul 17, 23:20 UTC12h 25m
2026-07-17 TWB644 HKG → ICN Jul 17, 05:35 UTCJul 17, 08:54 UTC3h 20m
2026-07-17 TWB643 ICN → HKG Jul 17, 00:10 UTCJul 17, 03:25 UTC3h 15m
2026-07-16 TWB208 - Jul 16, 11:50 UTCJul 16, 12:49 UTC1h 0m
2026-07-16 TWB207 - Jul 16, 09:20 UTCJul 16, 10:10 UTC50m
2026-07-16 TWB282 - Jul 16, 06:05 UTCJul 16, 07:45 UTC1h 40m
2026-07-16 TWB281 - Jul 16, 03:45 UTCJul 16, 04:10 UTC25m
2026-07-16 TWB281 - Jul 16, 02:20 UTCJul 16, 03:00 UTC40m
2026-07-15 TWB055 ICN → ICN Jul 15, 11:20 UTCJul 15, 23:45 UTC12h 25m
2026-07-14 TWB008 ICN → ICN Jul 14, 23:05 UTCJul 15, 09:15 UTC10h 10m
2026-07-14 TWB034 ICN → ICN Jul 14, 10:50 UTCJul 14, 21:15 UTC10h 25m
2026-07-13 TWB034 ICN → ICN Jul 13, 10:45 UTCJul 13, 21:25 UTC10h 40m
2026-07-12 TWB013 ICN → ICN Jul 12, 13:01 UTCJul 12, 23:00 UTC10h 0m
2026-07-11 TWB008 ICN → ICN Jul 11, 23:10 UTCJul 12, 09:15 UTC10h 5m
2026-07-11 TWB282 - Jul 11, 13:50 UTCJul 11, 14:25 UTC35m
2026-07-11 TWB282 - Jul 11, 12:45 UTCJul 11, 12:55 UTC10m
2026-07-11 TWB281 - Jul 11, 09:30 UTCJul 11, 11:20 UTC1h 50m
2026-07-10 TWB644 HKG → ICN Jul 10, 05:35 UTCJul 10, 08:50 UTC3h 15m
2026-07-10 TWB643 ICN → HKG Jul 10, 00:10 UTCJul 10, 03:20 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 HL8513 page for operator, model, and routing details .

Mode-S 71C513 frequently asked

What is Mode-S code 71C513?
71C513 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8513.
Where is Mode-S 71C513 registered?
Mode-S code 71C513 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 71C513 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C513, octal 34342423, decimal 7,456,019.
What flights does 71C513 operate?
Mode-S 71C513 has broadcast 20 distinct callsigns, including TWB007, TWB282, TWB008, TWB304, TWB303.