Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C350

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

Currently assigned to HL8350 · BOEING 737 MAX 8

Hex
71C350
Octal
34341520
Decimal
7,455,568
Country
KR
Tail
HL8350
Type
B38M
No current signal · last broadcast 2h ago
Flights observed
267
Distinct callsigns
20
Country
KR
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 71C350.

Country allocation

The ICAO 24-bit address 71C350 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
KAL804 - 22 2026-07-14
KAL721 - 22 2026-07-14
KAL803 - 21 2026-07-14
KAL722 - 19 2026-07-14
KAL833 - 18 2026-07-09
KAL713 - 17 2026-07-04
KAL834 - 16 2026-07-09
KAL714 - 15 2026-07-04
KAL782 - 10 2026-07-11
KAL708 - 10 2026-07-06
KAL806 - 9 2026-07-04
KAL805 - 8 2026-07-04
KAL781 - 8 2026-07-11
KAL707 - 8 2026-07-06
KAL841 - 7 2026-07-05
KAL726 Korean Air 7 2026-05-10
KAL842 - 6 2026-07-06
KAL795 - 6 2026-06-30
KAL796 Korean Air 5 2026-06-30
KAL725 Korean Air 5 2026-05-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KAL721 ICN → KIX Jul 14, 10:05 UTCJul 14, 11:25 UTC1h 20m
2026-07-14 KAL804 - Jul 14, 07:55 UTCJul 14, 08:15 UTC20m
2026-07-14 KAL803 - Jul 14, 04:00 UTCJul 14, 04:25 UTC25m
2026-07-14 KAL722 KIX → ICN Jul 14, 00:25 UTCJul 14, 01:50 UTC1h 25m
2026-07-13 KAL721 - Jul 13, 10:10 UTCJul 13, 11:30 UTC1h 20m
2026-07-13 KAL804 - Jul 13, 08:10 UTCJul 13, 08:35 UTC25m
2026-07-13 KAL803 - Jul 13, 04:05 UTCJul 13, 04:25 UTC20m
2026-07-13 KAL722 KIX → ICN Jul 13, 00:25 UTCJul 13, 01:45 UTC1h 20m
2026-07-12 KAL721 ICN → KIX Jul 12, 10:10 UTCJul 12, 11:30 UTC1h 20m
2026-07-12 KAL804 - Jul 12, 08:05 UTCJul 12, 08:25 UTC20m
2026-07-12 KAL803 - Jul 12, 03:50 UTCJul 12, 04:15 UTC25m
2026-07-11 KAL782 - Jul 11, 12:15 UTCJul 11, 13:15 UTC1h 0m
2026-07-11 KAL781 - Jul 11, 09:55 UTCJul 11, 10:35 UTC40m
2026-07-11 KAL742 - Jul 11, 05:50 UTCJul 11, 07:20 UTC1h 30m
2026-07-11 KAL741 - Jul 11, 03:01 UTCJul 11, 04:15 UTC1h 15m
2026-07-10 KAL782 - Jul 10, 12:25 UTCJul 10, 13:25 UTC1h 0m
2026-07-10 KAL781 - Jul 10, 09:50 UTCJul 10, 10:35 UTC45m
2026-07-09 KAL834 - Jul 9, 09:55 UTCJul 9, 10:20 UTC25m
2026-07-09 KAL833 - Jul 9, 05:55 UTCJul 9, 06:15 UTC20m
2026-07-08 KAL834 - Jul 8, 10:20 UTCJul 8, 10:45 UTC25m
2026-07-08 KAL833 - Jul 8, 06:00 UTCJul 8, 06:25 UTC25m
2026-07-06 KAL708 - Jul 6, 10:15 UTCJul 6, 12:20 UTC2h 5m
2026-07-06 KAL707 - Jul 6, 06:00 UTCJul 6, 08:00 UTC2h 0m
2026-07-06 KAL842 - Jul 6, 02:50 UTCJul 6, 03:10 UTC20m
2026-07-05 KAL841 - Jul 5, 23:05 UTCJul 5, 23:25 UTC20m
2026-07-05 KAL782 - Jul 5, 12:15 UTCJul 5, 13:20 UTC1h 5m
2026-07-05 KAL781 - Jul 5, 10:00 UTCJul 5, 10:45 UTC45m
2026-07-05 KAL742 - Jul 5, 05:20 UTCJul 5, 06:55 UTC1h 35m
2026-07-05 KAL741 - Jul 5, 02:05 UTCJul 5, 03:20 UTC1h 15m
2026-07-04 KAL714 - Jul 4, 12:20 UTCJul 4, 14:30 UTC2h 10m
2026-07-04 KAL713 ICN → NRT Jul 4, 08:40 UTCJul 4, 10:40 UTC2h 0m
2026-07-04 KAL806 - Jul 4, 04:40 UTCJul 4, 05:05 UTC25m
2026-07-04 KAL805 - Jul 4, 00:35 UTCJul 4, 00:55 UTC20m
2026-07-03 KAL714 - Jul 3, 12:20 UTCJul 3, 14:30 UTC2h 10m
2026-07-03 KAL713 ICN → NRT Jul 3, 08:35 UTCJul 3, 10:30 UTC1h 55m
2026-07-03 KAL806 - Jul 3, 04:40 UTCJul 3, 05:05 UTC25m
2026-07-03 KAL805 - Jul 3, 00:45 UTCJul 3, 01:00 UTC15m
2026-07-02 KAL708 - Jul 2, 11:50 UTCJul 2, 12:15 UTC25m
2026-07-02 KAL708 - Jul 2, 10:15 UTCJul 2, 11:15 UTC1h 0m
2026-07-02 KAL707 - Jul 2, 06:00 UTCJul 2, 08:00 UTC2h 0m
2026-07-01 KAL708 - Jul 1, 11:10 UTCJul 1, 13:10 UTC2h 0m
2026-07-01 KAL707 ICN → NRT Jul 1, 07:45 UTCJul 1, 09:40 UTC1h 55m
2026-06-30 KAL796 CTS → ICN Jun 30, 10:45 UTCJun 30, 11:30 UTC45m
2026-06-30 KAL795 - Jun 30, 06:50 UTCJun 30, 07:45 UTC55m
2026-06-30 KAL806 - Jun 30, 04:50 UTCJun 30, 05:15 UTC25m
2026-06-30 KAL805 - Jun 30, 00:39 UTCJun 30, 00:55 UTC15m
2026-06-29 KAL796 CTS → ICN Jun 29, 10:34 UTCJun 29, 11:29 UTC55m
2026-06-29 KAL795 - Jun 29, 06:50 UTCJun 29, 08:04 UTC1h 15m
2026-06-29 KAL806 - Jun 29, 04:39 UTCJun 29, 05:15 UTC35m
2026-06-29 KAL805 - Jun 29, 00:39 UTCJun 29, 00:54 UTC15m

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 HL8350 page for operator, model, and routing details .

Mode-S 71C350 frequently asked

What is Mode-S code 71C350?
71C350 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8350.
Where is Mode-S 71C350 registered?
Mode-S code 71C350 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 71C350 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C350, octal 34341520, decimal 7,455,568.
What flights does 71C350 operate?
Mode-S 71C350 has broadcast 20 distinct callsigns, including KAL804, KAL721, KAL803, KAL722, KAL833.