Apparatus

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sensors Mode-S transponder

71BE37

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

Currently assigned to HL7637 · BOEING 747-8

Hex
71BE37
Octal
34337067
Decimal
7,454,263
Country
KR
Tail
HL7637
Type
B748
No current signal · last broadcast Jul 26, 20:25 UTC
Flights observed
117
Distinct callsigns
14
Country
KR
Last broadcast
Jul 26, 20:25 UTC

Last known position

Most recent position reported by Mode-S 71BE37.

Country allocation

The ICAO 24-bit address 71BE37 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 14 distinct

Callsign Airline Flights Last seen
KAL018 Korean Air 33 2026-07-25
KAL017 Korean Air 31 2026-07-25
KAL8016 - 16 2026-06-29
KAL8015 - 15 2026-06-29
KAL012 - 5 2026-07-02
KAL011 - 5 2026-07-01
KAL704 Korean Air 2 2026-06-01
KAL703 Korean Air 2 2026-06-01
KAL2011 Korean Air 2 2026-07-26
KAL2001 Korean Air 2 2026-05-20
KL198P - 1 2026-07-20
KAL2012 Korean Air 1 2026-07-26
KAL2002 Korean Air 1 2026-05-20
KAL199F Korean Air 1 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL2012 HKG → ICN Jul 26, 17:15 UTCJul 26, 20:20 UTC3h 5m
2026-07-26 KAL2011 ICN → HKG Jul 26, 14:30 UTCJul 26, 14:40 UTC10m
2026-07-26 KAL2011 ICN → HKG Jul 26, 11:35 UTCJul 26, 13:45 UTC2h 10m
2026-07-25 KAL018 LAX → ICN Jul 25, 20:15 UTCJul 26, 08:15 UTC12h 0m
2026-07-25 KAL017 ICN → LAX Jul 25, 06:10 UTCJul 25, 17:15 UTC11h 5m
2026-07-23 KAL018 LAX → ICN Jul 23, 20:20 UTCJul 24, 07:35 UTC11h 15m
2026-07-23 KAL017 ICN → LAX Jul 23, 06:20 UTCJul 23, 17:25 UTC11h 5m
2026-07-21 KAL018 - Jul 21, 21:00 UTCJul 21, 22:00 UTC1h 0m
2026-07-21 KAL017 ICN → LAX Jul 21, 06:00 UTCJul 21, 17:00 UTC11h 0m
2026-07-20 KL198P PUS → ICN Jul 20, 13:55 UTCJul 20, 14:35 UTC40m
2026-07-11 KAL199F ICN → PUS Jul 11, 12:50 UTCJul 11, 13:50 UTC1h 0m
2026-07-10 KAL018 - Jul 10, 20:25 UTCJul 11, 08:15 UTC11h 50m
2026-07-10 KAL017 ICN → LAX Jul 10, 05:50 UTCJul 10, 16:40 UTC10h 50m
2026-07-08 KAL018 - Jul 8, 20:25 UTCJul 9, 08:35 UTC12h 10m
2026-07-08 KAL017 ICN → LAX Jul 8, 06:10 UTCJul 8, 17:00 UTC10h 50m
2026-07-05 KAL018 - Jul 5, 20:35 UTCJul 6, 08:45 UTC12h 10m
2026-07-05 KAL017 ICN → LAX Jul 5, 05:50 UTCJul 5, 16:30 UTC10h 40m
2026-07-03 KAL018 - Jul 3, 20:20 UTCJul 4, 08:30 UTC12h 10m
2026-07-03 KAL017 - Jul 3, 05:50 UTCJul 3, 16:15 UTC10h 25m
2026-07-02 KAL012 - Jul 2, 07:15 UTCJul 2, 19:25 UTC12h 10m
2026-07-01 KAL011 ICN → LAX Jul 1, 11:05 UTCJul 1, 21:35 UTC10h 30m
2026-06-29 KAL8016 - Jun 29, 17:19 UTCJun 30, 05:40 UTC12h 21m
2026-06-29 KAL8015 ICN → LAX Jun 29, 04:14 UTCJun 29, 14:29 UTC10h 15m
2026-06-27 KAL018 - Jun 27, 19:39 UTCJun 28, 08:19 UTC12h 40m
2026-06-27 KAL017 ICN → LAX Jun 27, 05:55 UTCJun 27, 16:14 UTC10h 20m
2026-06-25 KAL018 - Jun 25, 19:54 UTCJun 26, 08:15 UTC12h 20m
2026-06-25 KAL017 - Jun 25, 05:55 UTCJun 25, 16:05 UTC10h 10m
2026-06-23 KAL018 - Jun 23, 19:39 UTCJun 24, 07:40 UTC12h 0m
2026-06-23 KAL017 ICN → LAX Jun 23, 05:54 UTCJun 23, 16:09 UTC10h 15m
2026-06-21 KAL018 - Jun 21, 19:50 UTCJun 22, 07:54 UTC12h 5m
2026-06-21 KAL017 ICN → LAX Jun 21, 05:54 UTCJun 21, 16:30 UTC10h 35m
2026-06-19 KAL018 - Jun 19, 19:49 UTCJun 20, 07:09 UTC11h 20m
2026-06-19 KAL017 ICN → LAX Jun 19, 05:54 UTCJun 19, 16:34 UTC10h 40m
2026-06-18 KAL012 - Jun 18, 07:05 UTCJun 18, 18:30 UTC11h 25m
2026-06-17 KAL011 ICN → LAX Jun 17, 11:05 UTCJun 17, 22:15 UTC11h 10m
2026-06-15 KAL018 - Jun 15, 20:10 UTCJun 16, 08:44 UTC12h 35m
2026-06-15 KAL017 ICN → LAX Jun 15, 06:15 UTCJun 15, 16:40 UTC10h 25m
2026-06-14 KAL018 - Jun 14, 07:25 UTCJun 14, 07:50 UTC25m
2026-06-13 KAL018 - Jun 13, 19:55 UTCJun 14, 06:55 UTC11h 0m
2026-06-13 KAL017 - Jun 13, 06:05 UTCJun 13, 16:20 UTC10h 15m
2026-06-11 KAL018 LAX → ICN Jun 11, 19:50 UTCJun 12, 08:25 UTC12h 36m
2026-06-11 KAL017 ICN → LAX Jun 11, 06:05 UTCJun 11, 16:15 UTC10h 10m
2026-06-09 KAL018 LAX → ICN Jun 9, 20:15 UTCJun 10, 09:20 UTC13h 5m
2026-06-09 KAL017 ICN → LAX Jun 9, 05:50 UTCJun 9, 15:50 UTC10h 0m
2026-06-07 KAL018 LAX → ICN Jun 7, 19:45 UTCJun 8, 08:25 UTC12h 40m
2026-06-07 KAL017 ICN → LAX Jun 7, 05:55 UTCJun 7, 16:05 UTC10h 10m
2026-06-04 KAL018 LAX → ICN Jun 4, 19:55 UTCJun 5, 08:05 UTC12h 10m
2026-06-04 KAL017 ICN → LAX Jun 4, 06:00 UTCJun 4, 16:20 UTC10h 20m
2026-06-03 KAL018 LAX → ICN Jun 3, 07:00 UTCJun 3, 07:25 UTC25m
2026-06-02 KAL018 LAX → ICN Jun 2, 19:55 UTCJun 3, 06:30 UTC10h 35m

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 HL7637 page for operator, model, and routing details .

Mode-S 71BE37 frequently asked

What is Mode-S code 71BE37?
71BE37 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7637.
Where is Mode-S 71BE37 registered?
Mode-S code 71BE37 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 71BE37 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BE37, octal 34337067, decimal 7,454,263.
What flights does 71BE37 operate?
Mode-S 71BE37 has broadcast 14 distinct callsigns, including KAL018, KAL017, KAL8016, KAL8015, KAL012.