Apparatus

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sensors Mode-S transponder

71C210

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

Currently assigned to HL8210 · BOEING 777-300ER

Hex
71C210
Octal
34341020
Decimal
7,455,248
Country
KR
Tail
HL8210
Type
B77W
No current signal · last broadcast 1h ago
Flights observed
179
Distinct callsigns
20
Country
KR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 71C210.

Country allocation

The ICAO 24-bit address 71C210 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
KAL091 - 31 2026-07-04
KAL092 Korean Air 30 2026-07-04
KAL926 - 16 2026-07-10
KAL925 - 15 2026-07-09
KAL475 - 9 2026-06-30
KAL652 - 7 2026-07-12
KAL651 - 7 2026-07-12
KAL438 - 5 2026-07-10
KAL437 - 5 2026-07-10
KAL476 Korean Air 4 2026-06-10
KAL038 Korean Air 4 2026-07-01
KAL037 - 4 2026-07-01
KAL946 Korean Air 3 2026-05-08
KAL788 Korean Air 3 2026-05-19
KAL787 Korean Air 3 2026-05-18
KAL643 - 3 2026-07-14
KAL874 - 2 2026-07-12
KAL873 - 2 2026-07-12
KAL766 Korean Air 2 2026-04-16
KAL765 Korean Air 2 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KAL643 - Jul 14, 10:40 UTCJul 14, 10:55 UTC15m
2026-07-14 KAL643 - Jul 14, 05:25 UTCJul 14, 08:05 UTC2h 40m
2026-07-13 KAL658 - Jul 13, 15:10 UTCJul 13, 20:10 UTC5h 0m
2026-07-13 KAL657 - Jul 13, 05:40 UTCJul 13, 06:01 UTC20m
2026-07-13 KAL657 - Jul 13, 01:05 UTCJul 13, 04:00 UTC2h 55m
2026-07-12 KAL652 - Jul 12, 19:01 UTCJul 12, 21:50 UTC2h 50m
2026-07-12 KAL652 - Jul 12, 16:55 UTCJul 12, 17:10 UTC15m
2026-07-12 KAL651 - Jul 12, 14:35 UTCJul 12, 14:50 UTC15m
2026-07-12 KAL651 - Jul 12, 09:45 UTCJul 12, 12:10 UTC2h 25m
2026-07-12 KAL874 - Jul 12, 07:31 UTCJul 12, 07:55 UTC25m
2026-07-12 KAL873 - Jul 12, 04:25 UTCJul 12, 04:45 UTC20m
2026-07-11 KAL844 - Jul 11, 08:45 UTCJul 11, 09:10 UTC25m
2026-07-11 KAL843 - Jul 11, 05:20 UTCJul 11, 05:35 UTC15m
2026-07-10 KAL438 - Jul 10, 22:20 UTCJul 11, 03:35 UTC5h 15m
2026-07-10 KAL438 - Jul 10, 20:45 UTCJul 10, 20:55 UTC10m
2026-07-10 KAL437 - Jul 10, 11:40 UTCJul 10, 17:00 UTC5h 20m
2026-07-10 KAL926 - Jul 10, 06:45 UTCJul 10, 07:10 UTC25m
2026-07-09 KAL926 - Jul 9, 20:00 UTCJul 10, 06:00 UTC10h 0m
2026-07-09 KAL925 - Jul 9, 04:45 UTCJul 9, 16:40 UTC11h 55m
2026-07-09 KAL925 - Jul 9, 03:25 UTCJul 9, 03:40 UTC15m
2026-07-07 KAL438 - Jul 7, 21:10 UTCJul 8, 02:10 UTC5h 0m
2026-07-07 KAL438 - Jul 7, 19:40 UTCJul 7, 19:50 UTC10m
2026-07-07 KAL437 - Jul 7, 17:25 UTCJul 7, 17:40 UTC15m
2026-07-07 KAL437 - Jul 7, 11:10 UTCJul 7, 16:00 UTC4h 50m
2026-07-07 KAL926 - Jul 7, 07:30 UTCJul 7, 07:50 UTC20m
2026-07-06 KAL926 - Jul 6, 20:20 UTCJul 6, 22:50 UTC2h 30m
2026-07-06 KAL925 - Jul 6, 05:35 UTCJul 6, 17:35 UTC12h 0m
2026-07-06 KAL925 - Jul 6, 04:15 UTCJul 6, 04:35 UTC20m
2026-07-04 KAL092 BOS → ICN Jul 4, 17:15 UTCJul 5, 07:40 UTC14h 25m
2026-07-04 KAL091 ICN → BOS Jul 4, 00:50 UTCJul 4, 14:20 UTC13h 30m
2026-07-03 KAL874 - Jul 3, 07:40 UTCJul 3, 08:05 UTC25m
2026-07-03 KAL873 - Jul 3, 04:45 UTCJul 3, 05:00 UTC15m
2026-07-02 KAL438 - Jul 2, 21:15 UTCJul 3, 02:15 UTC5h 0m
2026-07-02 KAL437 - Jul 2, 17:15 UTCJul 2, 17:30 UTC15m
2026-07-02 KAL437 - Jul 2, 11:05 UTCJul 2, 15:55 UTC4h 50m
2026-07-01 KAL038 ORD → ICN Jul 1, 17:50 UTCJul 2, 07:25 UTC13h 35m
2026-07-01 KAL037 ICN → ORD Jul 1, 02:05 UTCJul 1, 14:25 UTC12h 20m
2026-06-30 KAL475 ICN → ICN Jun 30, 10:50 UTCJun 30, 22:05 UTC11h 15m
2026-06-29 KAL092 BOS → ICN Jun 29, 17:30 UTCJun 30, 07:25 UTC13h 55m
2026-06-29 KAL091 ICN → BOS Jun 29, 01:00 UTCJun 29, 14:19 UTC13h 20m
2026-06-27 KAL092 BOS → ICN Jun 27, 17:34 UTCJun 28, 08:29 UTC14h 55m
2026-06-27 KAL091 ICN → BOS Jun 27, 01:19 UTCJun 27, 14:25 UTC13h 5m
2026-06-26 KAL092 BOS → ICN Jun 26, 06:29 UTCJun 26, 08:34 UTC2h 5m
2026-06-25 KAL092 BOS → ICN Jun 25, 18:04 UTCJun 26, 01:20 UTC7h 15m
2026-06-25 KAL091 ICN → BOS Jun 25, 01:04 UTCJun 25, 14:09 UTC13h 5m
2026-06-23 KAL092 BOS → ICN Jun 23, 17:09 UTCJun 24, 07:24 UTC14h 15m
2026-06-23 KAL091 ICN → BOS Jun 23, 01:04 UTCJun 23, 14:25 UTC13h 20m
2026-06-22 KAL926 - Jun 22, 06:45 UTCJun 22, 07:04 UTC20m
2026-06-21 KAL926 - Jun 21, 20:05 UTCJun 22, 06:00 UTC9h 55m
2026-06-21 KAL925 - Jun 21, 04:24 UTCJun 21, 16:34 UTC12h 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 HL8210 page for operator, model, and routing details .

Mode-S 71C210 frequently asked

What is Mode-S code 71C210?
71C210 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8210.
Where is Mode-S 71C210 registered?
Mode-S code 71C210 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 71C210 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 71C210, octal 34341020, decimal 7,455,248.
What flights does 71C210 operate?
Mode-S 71C210 has broadcast 20 distinct callsigns, including KAL091, KAL092, KAL926, KAL925, KAL475.