Apparatus

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sensors Mode-S transponder

71C099

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

Currently assigned to HL8099 · AIRBUS A-321

Hex
71C099
Octal
34340231
Decimal
7,454,873
Country
KR
Tail
HL8099
Type
A321
Broadcasting now · callsign ABL172 · 31,000 ft
Flights observed
415
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 21:45 UTC

Current position

71C099 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C099 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
ABL163 Air Busan 45 2026-07-26
ABL164 Air Busan 41 2026-07-25
ABL165 Air Busan 37 2026-07-24
ABL172 Air Busan 36 2026-07-24
ABL166 Air Busan 36 2026-07-24
ABL171 Air Busan 35 2026-07-24
ABL176 Air Busan 34 2026-07-26
ABL175 Air Busan 34 2026-07-26
ABL3935 Air Busan 24 2026-07-26
ABL3945 Air Busan 23 2026-07-26
ABL8811 Air Busan 5 2026-05-07
ABL382 Air Busan 5 2026-05-05
ABL381 Air Busan 5 2026-05-05
ABL8040 Air Busan 4 2026-05-07
ABL793 Air Busan 4 2026-04-27
ABL8826 Air Busan 3 2026-05-07
ABL8021 Air Busan 3 2026-04-16
ABL134 Air Busan 3 2026-05-06
ABL133 Air Busan 3 2026-05-06
ABL8803 Air Busan 2 2026-04-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ABL3945 HKG → ICN Jul 26, 18:40 UTCJul 26, 21:40 UTC3h 0m
2026-07-26 ABL3945 HKG → ICN Jul 26, 18:00 UTCJul 26, 18:05 UTC5m
2026-07-26 ABL3935 ICN → HKG Jul 26, 13:10 UTCJul 26, 16:30 UTC3h 20m
2026-07-26 ABL175 KIX → ICN Jul 26, 09:30 UTCJul 26, 10:50 UTC1h 20m
2026-07-26 ABL176 ICN → KIX Jul 26, 06:05 UTCJul 26, 07:20 UTC1h 16m
2026-07-26 ABL163 NRT → ICN Jul 26, 02:45 UTCJul 26, 04:50 UTC2h 5m
2026-07-25 ABL164 ICN → NRT Jul 25, 22:25 UTCJul 26, 00:20 UTC1h 55m
2026-07-25 ABL175 KIX → ICN Jul 25, 09:35 UTCJul 25, 10:55 UTC1h 20m
2026-07-25 ABL176 ICN → KIX Jul 25, 06:15 UTCJul 25, 07:40 UTC1h 25m
2026-07-25 ABL163 NRT → ICN Jul 25, 02:30 UTCJul 25, 04:30 UTC2h 0m
2026-07-24 ABL164 ICN → NRT Jul 24, 22:30 UTCJul 25, 00:35 UTC2h 5m
2026-07-24 ABL165 NRT → ICN Jul 24, 11:45 UTCJul 24, 13:45 UTC2h 0m
2026-07-24 ABL166 ICN → NRT Jul 24, 08:10 UTCJul 24, 10:10 UTC2h 0m
2026-07-24 ABL171 KIX → ICN Jul 24, 04:30 UTCJul 24, 05:45 UTC1h 15m
2026-07-24 ABL172 ICN → KIX Jul 24, 00:55 UTCJul 24, 02:25 UTC1h 30m
2026-07-23 ABL3945 HKG → ICN Jul 23, 17:40 UTCJul 23, 20:50 UTC3h 10m
2026-07-23 ABL3935 ICN → HKG Jul 23, 13:00 UTCJul 23, 16:10 UTC3h 10m
2026-07-23 ABL171 KIX → ICN Jul 23, 04:20 UTCJul 23, 05:40 UTC1h 20m
2026-07-23 ABL172 ICN → KIX Jul 23, 01:00 UTCJul 23, 02:20 UTC1h 20m
2026-07-22 ABL172 ICN → KIX Jul 22, 03:45 UTCJul 22, 05:10 UTC1h 25m
2026-07-21 ABL163 NRT → ICN Jul 21, 03:50 UTCJul 21, 05:50 UTC2h 0m
2026-07-20 ABL164 - Jul 20, 22:25 UTCJul 21, 00:20 UTC1h 55m
2026-07-20 ABL165 NRT → ICN Jul 20, 11:25 UTCJul 20, 13:30 UTC2h 5m
2026-07-20 ABL166 ICN → NRT Jul 20, 07:35 UTCJul 20, 09:45 UTC2h 10m
2026-07-20 ABL171 KIX → ICN Jul 20, 04:30 UTCJul 20, 05:55 UTC1h 25m
2026-07-20 ABL172 ICN → KIX Jul 20, 01:20 UTCJul 20, 03:05 UTC1h 45m
2026-07-19 ABL3945 HKG → ICN Jul 19, 17:35 UTCJul 19, 20:40 UTC3h 5m
2026-07-19 ABL3935 ICN → HKG Jul 19, 12:45 UTCJul 19, 16:05 UTC3h 20m
2026-07-19 ABL175 KIX → ICN Jul 19, 09:40 UTCJul 19, 11:05 UTC1h 25m
2026-07-19 ABL176 - Jul 19, 06:15 UTCJul 19, 07:45 UTC1h 30m
2026-07-19 ABL163 - Jul 19, 02:40 UTCJul 19, 04:40 UTC2h 0m
2026-07-18 ABL164 - Jul 18, 22:25 UTCJul 19, 00:20 UTC1h 55m
2026-07-18 ABL175 KIX → ICN Jul 18, 09:35 UTCJul 18, 11:00 UTC1h 25m
2026-07-18 ABL176 - Jul 18, 06:30 UTCJul 18, 08:00 UTC1h 30m
2026-07-18 ABL163 - Jul 18, 02:29 UTCJul 18, 04:20 UTC1h 51m
2026-07-17 ABL164 - Jul 17, 22:25 UTCJul 18, 00:29 UTC2h 5m
2026-07-17 ABL165 NRT → ICN Jul 17, 11:25 UTCJul 17, 13:20 UTC1h 55m
2026-07-17 ABL166 ICN → NRT Jul 17, 07:44 UTCJul 17, 09:50 UTC2h 5m
2026-07-17 ABL171 - Jul 17, 04:20 UTCJul 17, 05:39 UTC1h 20m
2026-07-17 ABL172 ICN → KIX Jul 17, 01:00 UTCJul 17, 02:20 UTC1h 20m
2026-07-16 ABL3945 - Jul 16, 17:40 UTCJul 16, 21:00 UTC3h 20m
2026-07-16 ABL3935 ICN → HKG Jul 16, 13:10 UTCJul 16, 16:15 UTC3h 5m
2026-07-16 ABL173 KIX → ICN Jul 16, 09:00 UTCJul 16, 10:15 UTC1h 15m
2026-07-16 ABL174 - Jul 16, 06:05 UTCJul 16, 07:30 UTC1h 25m
2026-07-16 ABL163 - Jul 16, 02:30 UTCJul 16, 04:25 UTC1h 55m
2026-07-15 ABL164 - Jul 15, 22:20 UTCJul 16, 00:15 UTC1h 55m
2026-07-15 ABL163 - Jul 15, 02:30 UTCJul 15, 04:30 UTC2h 0m
2026-07-14 ABL164 ICN → NRT Jul 14, 22:30 UTCJul 15, 00:30 UTC1h 59m
2026-07-14 ABL163 - Jul 14, 02:25 UTCJul 14, 04:20 UTC1h 55m
2026-07-13 ABL164 - Jul 13, 22:35 UTCJul 14, 00:30 UTC1h 55m

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 HL8099 page for operator, model, and routing details .

Mode-S 71C099 frequently asked

What is Mode-S code 71C099?
71C099 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8099.
Where is Mode-S 71C099 registered?
Mode-S code 71C099 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 71C099 broadcasting right now?
Yes. Mode-S 71C099 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C099, octal 34340231, decimal 7,454,873.
What flights does 71C099 operate?
Mode-S 71C099 has broadcast 20 distinct callsigns, including ABL163, ABL164, ABL165, ABL172, ABL166.