Apparatus

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sensors Mode-S transponder

71BF89

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

Currently assigned to HL7789 · AIRBUS A-321

Hex
71BF89
Octal
34337611
Decimal
7,454,601
Country
KR
Tail
HL7789
Type
A321
No current signal · last broadcast 12h ago
Flights observed
437
Distinct callsigns
20
Country
KR
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 71BF89.

Country allocation

The ICAO 24-bit address 71BF89 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
ASV702 - 29 2026-07-13
ASV704 - 26 2026-07-13
ASV703 - 25 2026-07-13
ASV716 - 22 2026-07-05
ASV701 - 22 2026-07-13
ASV715 - 21 2026-07-05
ASV724 - 20 2026-07-14
ASV723 - 20 2026-07-13
ASV706 - 20 2026-07-05
ASV705 Astravia-Bissau Air Transports Ltd. 20 2026-07-04
ASV711 - 17 2026-07-08
ASV742 - 16 2026-07-07
ASV741 - 16 2026-07-07
ASV714 - 16 2026-07-07
ASV712 - 16 2026-07-09
ASV713 - 15 2026-07-07
ASV102 - 15 2026-07-09
ASV511 - 14 2026-07-07
ASV746 - 13 2026-07-10
ASV728 - 13 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ASV812 ICN → ICN Jul 14, 03:35 UTCJul 14, 10:55 UTC7h 20m
2026-07-14 ASV724 - Jul 14, 00:40 UTCJul 14, 01:40 UTC1h 0m
2026-07-13 ASV723 - Jul 13, 22:35 UTCJul 13, 23:20 UTC45m
2026-07-13 ASV704 NRT → ICN Jul 13, 11:25 UTCJul 13, 13:20 UTC1h 55m
2026-07-13 ASV703 - Jul 13, 07:55 UTCJul 13, 10:00 UTC2h 5m
2026-07-13 ASV702 - Jul 13, 04:05 UTCJul 13, 06:01 UTC1h 55m
2026-07-13 ASV701 - Jul 13, 00:35 UTCJul 13, 02:35 UTC2h 0m
2026-07-12 ASV704 - Jul 12, 11:35 UTCJul 12, 13:30 UTC1h 55m
2026-07-12 ASV703 - Jul 12, 08:15 UTCJul 12, 10:10 UTC1h 55m
2026-07-12 ASV702 - Jul 12, 04:10 UTCJul 12, 06:05 UTC1h 55m
2026-07-12 ASV701 - Jul 12, 00:45 UTCJul 12, 02:40 UTC1h 55m
2026-07-11 ASV528 - Jul 11, 22:30 UTCJul 11, 23:10 UTC40m
2026-07-11 ASV528 - Jul 11, 21:25 UTCJul 11, 21:35 UTC10m
2026-07-11 ASV527 - Jul 11, 12:35 UTCJul 11, 20:45 UTC8h 10m
2026-07-11 ASV811 ICN → ICN Jul 11, 03:40 UTCJul 11, 11:10 UTC7h 30m
2026-07-11 ASV724 - Jul 11, 00:50 UTCJul 11, 01:50 UTC1h 0m
2026-07-10 ASV723 - Jul 10, 22:45 UTCJul 10, 23:30 UTC45m
2026-07-10 ASV704 - Jul 10, 13:25 UTCJul 10, 15:30 UTC2h 5m
2026-07-10 ASV703 - Jul 10, 09:55 UTCJul 10, 11:50 UTC1h 55m
2026-07-10 ASV746 - Jul 10, 04:35 UTCJul 10, 08:10 UTC3h 35m
2026-07-10 ASV724 - Jul 10, 01:45 UTCJul 10, 03:00 UTC1h 15m
2026-07-09 ASV723 - Jul 9, 23:20 UTCJul 10, 00:05 UTC45m
2026-07-09 ASV102 - Jul 9, 11:00 UTCJul 9, 20:30 UTC9h 30m
2026-07-09 ASV746 - Jul 9, 04:55 UTCJul 9, 08:15 UTC3h 20m
2026-07-09 ASV712 KIX → ICN Jul 9, 01:20 UTCJul 9, 02:50 UTC1h 30m
2026-07-08 ASV711 - Jul 8, 22:30 UTCJul 9, 00:00 UTC1h 30m
2026-07-08 ASV704 - Jul 8, 13:50 UTCJul 8, 15:45 UTC1h 55m
2026-07-08 ASV703 - Jul 8, 10:00 UTCJul 8, 12:00 UTC2h 0m
2026-07-08 ASV746 - Jul 8, 07:45 UTCJul 8, 08:25 UTC40m
2026-07-08 ASV745 - Jul 8, 04:40 UTCJul 8, 05:15 UTC35m
2026-07-08 ASV724 - Jul 8, 02:00 UTCJul 8, 03:05 UTC1h 5m
2026-07-08 ASV723 - Jul 8, 00:00 UTCJul 8, 00:50 UTC50m
2026-07-07 ASV511 - Jul 7, 12:50 UTCJul 7, 22:35 UTC9h 45m
2026-07-07 ASV714 KIX → ICN Jul 7, 08:35 UTCJul 7, 09:50 UTC1h 15m
2026-07-07 ASV713 ICN → KIX Jul 7, 05:25 UTCJul 7, 06:50 UTC1h 25m
2026-07-07 ASV742 - Jul 7, 02:35 UTCJul 7, 03:50 UTC1h 15m
2026-07-07 ASV741 - Jul 7, 00:00 UTCJul 7, 01:05 UTC1h 5m
2026-07-06 ASV528 - Jul 6, 11:15 UTCJul 6, 22:00 UTC10h 45m
2026-07-06 ASV728 - Jul 6, 08:10 UTCJul 6, 09:15 UTC1h 5m
2026-07-06 ASV727 - Jul 6, 05:55 UTCJul 6, 06:35 UTC40m
2026-07-06 ASV742 - Jul 6, 02:50 UTCJul 6, 04:10 UTC1h 20m
2026-07-06 ASV741 - Jul 6, 00:30 UTCJul 6, 01:45 UTC1h 15m
2026-07-05 ASV512 - Jul 5, 12:50 UTCJul 5, 22:20 UTC9h 30m
2026-07-05 ASV716 KIX → ICN Jul 5, 09:35 UTCJul 5, 11:05 UTC1h 30m
2026-07-05 ASV715 - Jul 5, 07:00 UTCJul 5, 08:25 UTC1h 25m
2026-07-05 ASV706 - Jul 5, 02:55 UTCJul 5, 05:05 UTC2h 10m
2026-07-04 ASV705 ICN → NRT Jul 4, 23:30 UTCJul 5, 01:20 UTC1h 50m
2026-07-04 ASV704 - Jul 4, 11:30 UTCJul 4, 13:25 UTC1h 55m
2026-07-04 ASV703 ICN → NRT Jul 4, 08:10 UTCJul 4, 10:05 UTC1h 55m
2026-07-04 ASV702 - Jul 4, 04:00 UTCJul 4, 06:05 UTC2h 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 HL7789 page for operator, model, and routing details .

Mode-S 71BF89 frequently asked

What is Mode-S code 71BF89?
71BF89 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7789.
Where is Mode-S 71BF89 registered?
Mode-S code 71BF89 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 71BF89 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF89, octal 34337611, decimal 7,454,601.
What flights does 71BF89 operate?
Mode-S 71BF89 has broadcast 20 distinct callsigns, including ASV702, ASV704, ASV703, ASV716, ASV701.