Apparatus

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sensors Mode-S transponder

71C073

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

Currently assigned to HL8073 · AIRBUS A-321

Hex
71C073
Octal
34340163
Decimal
7,454,835
Country
KR
Tail
HL8073
Type
A321
No current signal · last broadcast 1h ago
Flights observed
457
Distinct callsigns
20
Country
KR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 71C073.

Country allocation

The ICAO 24-bit address 71C073 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
ASV704 - 29 2026-07-01
ASV706 - 27 2026-07-19
ASV703 - 27 2026-07-01
ASV702 - 25 2026-07-01
ASV701 - 24 2026-07-01
ASV716 Astravia-Bissau Air Transports Ltd. 22 2026-07-19
ASV715 - 22 2026-07-19
ASV705 - 22 2026-07-19
ASV746 - 17 2026-07-20
ASV745 - 14 2026-07-20
ASV728 - 13 2026-07-17
ASV727 - 13 2026-07-17
ASV711 Astravia-Bissau Air Transports Ltd. 13 2026-07-20
ASV511 Astravia-Bissau Air Transports Ltd. 13 2026-07-21
ASV724 Astravia-Bissau Air Transports Ltd. 12 2026-07-20
ASV723 Astravia-Bissau Air Transports Ltd. 12 2026-07-19
ASV712 - 12 2026-07-21
ASV908 - 11 2026-07-13
ASV907 - 11 2026-07-13
ASV906 - 11 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 ASV511 ICN → DAD Jul 21, 12:20 UTCJul 21, 14:45 UTC2h 25m
2026-07-21 ASV714 KIX → ICN Jul 21, 07:50 UTCJul 21, 09:10 UTC1h 20m
2026-07-21 ASV713 ICN → KIX Jul 21, 04:40 UTCJul 21, 06:10 UTC1h 30m
2026-07-21 ASV712 KIX → ICN Jul 21, 01:45 UTCJul 21, 03:10 UTC1h 25m
2026-07-20 ASV711 ICN → KIX Jul 20, 22:45 UTCJul 21, 00:10 UTC1h 24m
2026-07-20 ASV746 - Jul 20, 07:10 UTCJul 20, 08:10 UTC1h 0m
2026-07-20 ASV745 - Jul 20, 04:40 UTCJul 20, 05:15 UTC35m
2026-07-20 ASV724 FUK → ICN Jul 20, 01:50 UTCJul 20, 02:50 UTC1h 0m
2026-07-19 ASV723 ICN → FUK Jul 19, 23:35 UTCJul 20, 00:25 UTC50m
2026-07-19 ASV511 - Jul 19, 12:35 UTCJul 19, 22:10 UTC9h 35m
2026-07-19 ASV716 KIX → ICN Jul 19, 09:35 UTCJul 19, 10:55 UTC1h 20m
2026-07-19 ASV715 - Jul 19, 06:55 UTCJul 19, 08:25 UTC1h 30m
2026-07-19 ASV706 - Jul 19, 03:40 UTCJul 19, 05:30 UTC1h 50m
2026-07-19 ASV705 - Jul 19, 00:10 UTCJul 19, 02:05 UTC1h 55m
2026-07-18 ASV512 ICN → ICN Jul 18, 13:00 UTCJul 18, 22:40 UTC9h 40m
2026-07-18 ASV716 KIX → ICN Jul 18, 09:50 UTCJul 18, 11:15 UTC1h 25m
2026-07-18 ASV715 - Jul 18, 07:10 UTCJul 18, 08:40 UTC1h 30m
2026-07-18 ASV742 - Jul 18, 04:30 UTCJul 18, 05:55 UTC1h 25m
2026-07-18 ASV741 - Jul 18, 02:14 UTCJul 18, 03:30 UTC1h 16m
2026-07-17 ASV528 - Jul 17, 12:25 UTCJul 17, 23:25 UTC11h 0m
2026-07-17 ASV728 - Jul 17, 08:25 UTCJul 17, 09:20 UTC55m
2026-07-17 ASV727 - Jul 17, 05:50 UTCJul 17, 06:40 UTC50m
2026-07-17 ASV742 - Jul 17, 02:59 UTCJul 17, 04:20 UTC1h 20m
2026-07-17 ASV741 - Jul 17, 00:30 UTCJul 17, 01:39 UTC1h 10m
2026-07-16 ASV512 - Jul 16, 12:25 UTCJul 16, 22:30 UTC10h 5m
2026-07-16 ASV716 KIX → ICN Jul 16, 09:25 UTCJul 16, 10:40 UTC1h 15m
2026-07-16 ASV715 - Jul 16, 06:40 UTCJul 16, 08:10 UTC1h 30m
2026-07-16 ASV706 - Jul 16, 03:00 UTCJul 16, 04:55 UTC1h 55m
2026-07-15 ASV705 - Jul 15, 23:30 UTCJul 16, 01:20 UTC1h 50m
2026-07-15 ASV746 - Jul 15, 07:05 UTCJul 15, 08:05 UTC1h 0m
2026-07-15 ASV745 - Jul 15, 04:40 UTCJul 15, 05:05 UTC25m
2026-07-15 ASV724 - Jul 15, 01:45 UTCJul 15, 02:45 UTC1h 0m
2026-07-14 ASV723 - Jul 14, 23:35 UTCJul 15, 00:30 UTC55m
2026-07-14 ASV511 - Jul 14, 12:30 UTCJul 14, 22:05 UTC9h 35m
2026-07-14 ASV716 KIX → ICN Jul 14, 09:15 UTCJul 14, 10:45 UTC1h 30m
2026-07-14 ASV715 - Jul 14, 06:35 UTCJul 14, 07:55 UTC1h 20m
2026-07-14 ASV706 - Jul 14, 03:00 UTCJul 14, 05:00 UTC2h 0m
2026-07-13 ASV705 - Jul 13, 23:30 UTCJul 14, 01:25 UTC1h 55m
2026-07-13 ASV9002 GMP → ICN Jul 13, 21:20 UTCJul 13, 21:45 UTC25m
2026-07-13 ASV908 - Jul 13, 12:30 UTCJul 13, 13:10 UTC40m
2026-07-13 ASV907 - Jul 13, 09:35 UTCJul 13, 10:15 UTC40m
2026-07-13 ASV906 - Jul 13, 07:55 UTCJul 13, 08:35 UTC40m
2026-07-13 ASV905 - Jul 13, 05:25 UTCJul 13, 06:01 UTC35m
2026-07-13 ASV904 - Jul 13, 03:40 UTCJul 13, 04:20 UTC40m
2026-07-13 ASV903 - Jul 13, 01:15 UTCJul 13, 01:50 UTC35m
2026-07-12 ASV902 - Jul 12, 23:30 UTCJul 13, 00:05 UTC35m
2026-07-12 ASV901 - Jul 12, 21:30 UTCJul 12, 22:05 UTC35m
2026-07-12 ASV908 - Jul 12, 12:30 UTCJul 12, 13:01 UTC30m
2026-07-12 ASV907 - Jul 12, 09:30 UTCJul 12, 10:05 UTC35m
2026-07-12 ASV906 - Jul 12, 07:45 UTCJul 12, 08:30 UTC45m

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 HL8073 page for operator, model, and routing details .

Mode-S 71C073 frequently asked

What is Mode-S code 71C073?
71C073 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8073.
Where is Mode-S 71C073 registered?
Mode-S code 71C073 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 71C073 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 71C073, octal 34340163, decimal 7,454,835.
What flights does 71C073 operate?
Mode-S 71C073 has broadcast 20 distinct callsigns, including ASV704, ASV706, ASV703, ASV702, ASV701.