Apparatus

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sensors Mode-S transponder

71BE23

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

Currently assigned to HL7623 · BOEING 747-8

Hex
71BE23
Octal
34337043
Decimal
7,454,243
Country
KR
Tail
HL7623
Type
B748
Broadcasting now · callsign KAL259 · 31,000 ft
Flights observed
277
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 22:15 UTC

Current position

71BE23 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71BE23 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
KAL8592 Korean Air 21 2026-06-13
KAL591 Korean Air 20 2026-06-12
KAL214 Korean Air 18 2026-07-25
KAL233 - 15 2026-07-10
KAL510 Korean Air 13 2026-07-26
KAL8256 - 12 2026-07-17
KAL509 Korean Air 11 2026-07-26
KAL8255 Korean Air 10 2026-07-17
KAL537 Korean Air 10 2026-07-23
KAL554 - 9 2026-07-09
KAL553 - 9 2026-07-09
KAL213 Korean Air 9 2026-07-24
KAL538 Korean Air 8 2026-07-24
KAL261 Korean Air 8 2026-05-13
KAL259 - 8 2026-07-19
KAL517 Korean Air 7 2026-05-26
KAL318 - 6 2026-07-24
KAL317 - 6 2026-07-24
KAL552 - 5 2026-07-22
KAL518 Korean Air 5 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL510 AMS → ICN Jul 26, 19:40 UTCJul 26, 22:15 UTC2h 35m
2026-07-26 KAL509 ICN → ARN Jul 26, 02:20 UTCJul 26, 15:00 UTC12h 41m
2026-07-25 KAL214 LAX → SFO Jul 25, 11:50 UTCJul 25, 23:00 UTC11h 10m
2026-07-25 KAL214 LAX → SFO Jul 25, 08:25 UTCJul 25, 09:15 UTC50m
2026-07-24 KAL213 ICN → LAX Jul 24, 18:10 UTCJul 25, 05:10 UTC11h 0m
2026-07-24 KAL318 - Jul 24, 13:45 UTCJul 24, 14:05 UTC20m
2026-07-24 KAL317 - Jul 24, 08:45 UTCJul 24, 09:05 UTC20m
2026-07-24 KAL538 FRA → ICN Jul 24, 06:15 UTCJul 24, 06:35 UTC20m
2026-07-23 KAL538 FRA → ICN Jul 23, 19:50 UTCJul 24, 05:25 UTC9h 35m
2026-07-23 KAL537 ICN → FRA Jul 23, 16:15 UTCJul 23, 17:15 UTC1h 0m
2026-07-23 KAL537 ICN → FRA Jul 23, 04:05 UTCJul 23, 14:30 UTC10h 25m
2026-07-23 KAL537 ICN → FRA Jul 23, 02:55 UTCJul 23, 03:20 UTC25m
2026-07-22 KAL315 ICN → ICN Jul 22, 15:15 UTCJul 22, 23:20 UTC8h 5m
2026-07-22 KAL552 - Jul 22, 10:20 UTCJul 22, 12:10 UTC1h 50m
2026-07-21 KAL8246 SEA → ICN Jul 21, 14:00 UTCJul 22, 00:40 UTC10h 40m
2026-07-21 KAL8245 ICN → ANC Jul 21, 08:05 UTCJul 21, 11:20 UTC3h 15m
2026-07-20 KAL8245 ICN → ANC Jul 20, 16:55 UTCJul 21, 05:40 UTC12h 45m
2026-07-19 KAL260 - Jul 19, 17:00 UTCJul 20, 06:30 UTC13h 30m
2026-07-19 KAL259 - Jul 19, 08:05 UTCJul 19, 13:35 UTC5h 30m
2026-07-18 KAL259 ICN → ANC Jul 18, 17:00 UTCJul 19, 06:45 UTC13h 45m
2026-07-18 KAL318 - Jul 18, 13:05 UTCJul 18, 13:25 UTC20m
2026-07-18 KAL317 - Jul 18, 08:00 UTCJul 18, 08:30 UTC30m
2026-07-17 KAL8256 DFW → ICN Jul 17, 21:30 UTCJul 18, 05:05 UTC7h 36m
2026-07-17 KAL8256 ATL → ANC Jul 17, 13:35 UTCJul 17, 20:04 UTC6h 30m
2026-07-17 KAL8255 ANC → DFW Jul 17, 09:45 UTCJul 17, 11:20 UTC1h 35m
2026-07-16 KAL8255 ANC → DFW Jul 16, 18:40 UTCJul 17, 07:35 UTC12h 55m
2026-07-16 KAL315D ICN → ICN Jul 16, 08:45 UTCJul 16, 15:40 UTC6h 55m
2026-07-16 KAL510 - Jul 16, 05:50 UTCJul 16, 06:10 UTC20m
2026-07-15 KAL510 - Jul 15, 19:20 UTCJul 16, 05:00 UTC9h 40m
2026-07-15 KAL509 - Jul 15, 04:05 UTCJul 15, 15:55 UTC11h 50m
2026-07-15 KAL509 - Jul 15, 02:50 UTCJul 15, 03:15 UTC25m
2026-07-14 KAL214 SFO → ICN Jul 14, 10:40 UTCJul 14, 21:55 UTC11h 15m
2026-07-14 KAL214 - Jul 14, 07:25 UTCJul 14, 08:10 UTC45m
2026-07-13 KAL213 - Jul 13, 17:50 UTCJul 14, 04:50 UTC11h 0m
2026-07-13 KAL510 - Jul 13, 05:35 UTCJul 13, 05:55 UTC20m
2026-07-12 KAL510 - Jul 12, 19:01 UTCJul 13, 04:50 UTC9h 50m
2026-07-12 KAL509 - Jul 12, 03:35 UTCJul 12, 15:25 UTC11h 50m
2026-07-12 KAL509 - Jul 12, 02:30 UTCJul 12, 02:45 UTC15m
2026-07-11 KAL318 - Jul 11, 08:55 UTCJul 11, 09:20 UTC25m
2026-07-11 KAL317 - Jul 11, 02:45 UTCJul 11, 03:05 UTC20m
2026-07-10 KAL234 SEA → ICN Jul 10, 13:50 UTCJul 11, 00:20 UTC10h 31m
2026-07-10 KAL233 - Jul 10, 08:10 UTCJul 10, 11:55 UTC3h 45m
2026-07-10 KAL233 ANC → ORD Jul 10, 00:20 UTCJul 10, 05:45 UTC5h 25m
2026-07-09 KAL233 ICN → ANC Jul 9, 15:25 UTCJul 9, 22:55 UTC7h 30m
2026-07-09 KAL554 KIX → ICN Jul 9, 10:55 UTCJul 9, 12:15 UTC1h 20m
2026-07-09 KAL553 ICN → KIX Jul 9, 05:35 UTCJul 9, 07:20 UTC1h 45m
2026-07-08 KAL214 SFO → ICN Jul 8, 11:05 UTCJul 8, 22:30 UTC11h 25m
2026-07-08 KAL214 - Jul 8, 07:30 UTCJul 8, 08:25 UTC55m
2026-07-07 KAL213 - Jul 7, 17:55 UTCJul 8, 04:35 UTC10h 40m
2026-07-07 KAL9204 - Jul 7, 01:25 UTCJul 7, 13:35 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 HL7623 page for operator, model, and routing details .

Mode-S 71BE23 frequently asked

What is Mode-S code 71BE23?
71BE23 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7623.
Where is Mode-S 71BE23 registered?
Mode-S code 71BE23 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 71BE23 broadcasting right now?
Yes. Mode-S 71BE23 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BE23, octal 34337043, decimal 7,454,243.
What flights does 71BE23 operate?
Mode-S 71BE23 has broadcast 20 distinct callsigns, including KAL8592, KAL591, KAL214, KAL233, KAL510.