Apparatus

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sensors Mode-S transponder

71BF83

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

Currently assigned to HL7783 · BOEING 777-300ER

Hex
71BF83
Octal
34337603
Decimal
7,454,595
Country
KR
Tail
HL7783
Type
B77W
No current signal · last broadcast Jul 26, 18:30 UTC
Flights observed
206
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 18:30 UTC

Last known position

Most recent position reported by Mode-S 71BF83.

Country allocation

The ICAO 24-bit address 71BF83 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
KAL652 Korean Air 15 2026-07-23
KAL651 Korean Air 15 2026-07-23
KAL038 Korean Air 15 2026-07-24
KAL037 Korean Air 14 2026-07-24
KAL092 Korean Air 11 2026-07-26
KAL091 Korean Air 11 2026-07-26
KAL926 - 10 2026-07-18
KAL925 - 10 2026-07-17
KAL946 - 8 2026-07-09
KAL945 - 7 2026-07-08
KAL622 - 6 2026-06-29
KAL476 - 6 2026-06-25
KAL475 - 6 2026-07-12
KAL437 - 6 2026-07-20
KAL624 Korean Air 5 2026-06-04
KAL623 Korean Air 5 2026-06-04
KAL621 - 5 2026-06-28
KAL788 - 4 2026-06-30
KAL787 Korean Air 4 2026-06-29
KAL9981 Korean Air 3 2026-04-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL092 BOS → ICN Jul 26, 17:25 UTCJul 26, 18:30 UTC1h 5m
2026-07-26 KAL091 ICN → BOS Jul 26, 01:05 UTCJul 26, 14:40 UTC13h 36m
2026-07-24 KAL038 ORD → ICN Jul 24, 17:45 UTCJul 25, 07:45 UTC14h 0m
2026-07-24 KAL037 ICN → ORD Jul 24, 02:20 UTCJul 24, 14:25 UTC12h 5m
2026-07-23 KAL652 BKK → ICN Jul 23, 17:15 UTCJul 23, 22:15 UTC5h 0m
2026-07-23 KAL651 ICN → BKK Jul 23, 09:25 UTCJul 23, 14:35 UTC5h 10m
2026-07-23 KAL9988 - Jul 23, 06:35 UTCJul 23, 07:00 UTC25m
2026-07-22 KAL9988 - Jul 22, 19:30 UTCJul 23, 05:50 UTC10h 20m
2026-07-22 KAL9987 ICN → OSL Jul 22, 03:40 UTCJul 22, 16:45 UTC13h 5m
2026-07-21 KAL844 TAO → ICN Jul 21, 08:25 UTCJul 21, 08:50 UTC25m
2026-07-21 KAL843 - Jul 21, 04:35 UTCJul 21, 05:05 UTC30m
2026-07-20 KAL438 CGK → ICN Jul 20, 21:05 UTCJul 21, 02:15 UTC5h 9m
2026-07-20 KAL437 - Jul 20, 17:05 UTCJul 20, 17:20 UTC15m
2026-07-20 KAL437 - Jul 20, 11:00 UTCJul 20, 15:40 UTC4h 40m
2026-07-19 KAL092 BOS → ICN Jul 19, 17:30 UTCJul 20, 08:20 UTC14h 50m
2026-07-19 KAL091 ICN → BOS Jul 19, 01:05 UTCJul 19, 14:15 UTC13h 10m
2026-07-18 KAL652 - Jul 18, 19:25 UTCJul 18, 22:15 UTC2h 50m
2026-07-18 KAL652 - Jul 18, 17:15 UTCJul 18, 17:25 UTC10m
2026-07-18 KAL651 - Jul 18, 14:00 UTCJul 18, 14:10 UTC10m
2026-07-18 KAL651 - Jul 18, 09:25 UTCJul 18, 12:05 UTC2h 40m
2026-07-18 KAL926 - Jul 18, 06:35 UTCJul 18, 07:05 UTC30m
2026-07-17 KAL926 - Jul 17, 20:04 UTCJul 18, 05:45 UTC9h 41m
2026-07-17 KAL925 - Jul 17, 04:49 UTCJul 17, 16:55 UTC12h 5m
2026-07-17 KAL925 - Jul 17, 03:39 UTCJul 17, 04:04 UTC25m
2026-07-15 KAL038 - Jul 15, 17:45 UTCJul 16, 06:55 UTC13h 10m
2026-07-15 KAL037 ICN → ORD Jul 15, 02:20 UTCJul 15, 14:45 UTC12h 25m
2026-07-14 KAL652 - Jul 14, 19:15 UTCJul 14, 21:55 UTC2h 40m
2026-07-14 KAL652 - Jul 14, 17:05 UTCJul 14, 17:20 UTC15m
2026-07-14 KAL651 - Jul 14, 14:30 UTCJul 14, 14:50 UTC20m
2026-07-14 KAL651 - Jul 14, 09:55 UTCJul 14, 12:35 UTC2h 40m
2026-07-13 KAL038 - Jul 13, 17:45 UTCJul 14, 07:25 UTC13h 40m
2026-07-13 KAL037 ICN → ORD Jul 13, 02:10 UTCJul 13, 14:40 UTC12h 30m
2026-07-12 KAL475 ICN → ICN Jul 12, 10:30 UTCJul 12, 21:45 UTC11h 15m
2026-07-11 KAL092 BOS → ICN Jul 11, 17:50 UTCJul 12, 08:25 UTC14h 35m
2026-07-11 KAL091 ICN → BOS Jul 11, 01:25 UTCJul 11, 14:50 UTC13h 25m
2026-07-10 KAL652 - Jul 10, 16:50 UTCJul 10, 21:55 UTC5h 5m
2026-07-10 KAL651 ICN → BKK Jul 10, 09:40 UTCJul 10, 14:35 UTC4h 55m
2026-07-10 KAL892 - Jul 10, 02:10 UTCJul 10, 02:50 UTC40m
2026-07-09 KAL891 - Jul 9, 11:25 UTCJul 9, 12:05 UTC40m
2026-07-09 KAL946 - Jul 9, 04:55 UTCJul 9, 05:15 UTC20m
2026-07-08 KAL946 - Jul 8, 18:30 UTCJul 9, 04:00 UTC9h 30m
2026-07-08 KAL945 - Jul 8, 03:55 UTCJul 8, 15:35 UTC11h 40m
2026-07-08 KAL945 - Jul 8, 02:35 UTCJul 8, 02:55 UTC20m
2026-07-06 KAL092 BOS → ICN Jul 6, 18:25 UTCJul 7, 08:20 UTC13h 55m
2026-07-06 KAL091 ICN → BOS Jul 6, 01:50 UTCJul 6, 15:10 UTC13h 20m
2026-07-04 KAL038 ORD → ICN Jul 4, 17:55 UTCJul 5, 07:20 UTC13h 25m
2026-07-04 KAL037 ICN → ORD Jul 4, 02:05 UTCJul 4, 14:30 UTC12h 25m
2026-07-03 KAL658 - Jul 3, 15:05 UTCJul 3, 20:00 UTC4h 55m
2026-07-03 KAL657 - Jul 3, 01:10 UTCJul 3, 06:10 UTC5h 0m
2026-07-02 KAL652 - Jul 2, 21:15 UTCJul 2, 21:40 UTC25m

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 HL7783 page for operator, model, and routing details .

Mode-S 71BF83 frequently asked

What is Mode-S code 71BF83?
71BF83 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7783.
Where is Mode-S 71BF83 registered?
Mode-S code 71BF83 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 71BF83 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF83, octal 34337603, decimal 7,454,595.
What flights does 71BF83 operate?
Mode-S 71BF83 has broadcast 20 distinct callsigns, including KAL652, KAL651, KAL038, KAL037, KAL092.