Apparatus

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sensors Mode-S transponder

71C759

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

Currently assigned to HL8759 · BOEING 737 MAX 8

Hex
71C759
Octal
34343531
Decimal
7,456,601
Country
KR
Tail
HL8759
Type
B38M
No current signal · last broadcast Jul 26, 21:50 UTC
Flights observed
462
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 21:50 UTC

Last known position

Most recent position reported by Mode-S 71C759.

Country allocation

The ICAO 24-bit address 71C759 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
ESR136 Eastar Jet 25 2026-07-26
ESR861 - 24 2026-07-18
ESR626 Eastar Jet 19 2026-07-25
ESR625 Eastar Jet 19 2026-07-25
ESR862 - 18 2026-07-18
ESR648 - 15 2026-07-06
ESR135 Eastar Jet 15 2026-07-25
ESR606 Eastar Jet 14 2026-07-23
ESR602 Eastar Jet 14 2026-07-24
ESR647 - 13 2026-07-06
ESR605 - 13 2026-07-22
ESR601 Eastar Jet 13 2026-07-23
ESR650 Eastar Jet 12 2026-07-22
ESR817 Eastar Jet 11 2026-07-17
ESR649 - 11 2026-07-06
ESR882 - 10 2026-07-12
ESR881 - 10 2026-07-12
ESR818 - 10 2026-07-17
ESR614 Eastar Jet 10 2026-07-24
ESR613 Eastar Jet 10 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ESR581 ICN → PQC Jul 26, 11:35 UTCJul 26, 21:50 UTC10h 15m
2026-07-26 ESR632 OKA → ICN Jul 26, 07:25 UTCJul 26, 08:10 UTC45m
2026-07-26 ESR632 OKA → ICN Jul 26, 06:20 UTCJul 26, 06:30 UTC10m
2026-07-26 ESR631 ICN → OKA Jul 26, 02:45 UTCJul 26, 04:30 UTC1h 45m
2026-07-26 ESR136 ALA → ICN Jul 26, 00:20 UTCJul 26, 00:40 UTC20m
2026-07-25 ESR136 ALA → ICN Jul 25, 12:10 UTCJul 25, 23:25 UTC11h 15m
2026-07-25 ESR135 ICN → ALA Jul 25, 10:55 UTCJul 25, 11:15 UTC20m
2026-07-25 ESR626 CTS → ICN Jul 25, 04:15 UTCJul 25, 06:40 UTC2h 25m
2026-07-25 ESR625 ICN → CTS Jul 25, 00:35 UTCJul 25, 02:55 UTC2h 20m
2026-07-24 ESR594 DAD → ICN Jul 24, 12:15 UTCJul 24, 21:45 UTC9h 30m
2026-07-24 ESR614 KIX → ICN Jul 24, 09:15 UTCJul 24, 10:35 UTC1h 20m
2026-07-24 ESR613 ICN → KIX Jul 24, 06:35 UTCJul 24, 08:00 UTC1h 25m
2026-07-24 ESR602 NRT → ICN Jul 24, 02:55 UTCJul 24, 04:50 UTC1h 55m
2026-07-23 ESR601 ICN → NRT Jul 23, 23:25 UTCJul 24, 01:30 UTC2h 5m
2026-07-23 ESR594 DAD → ICN Jul 23, 12:10 UTCJul 23, 21:50 UTC9h 40m
2026-07-23 ESR820 - Jul 23, 09:10 UTCJul 23, 09:30 UTC20m
2026-07-23 ESR819 - Jul 23, 05:50 UTCJul 23, 06:15 UTC25m
2026-07-23 ESR606 NRT → ICN Jul 23, 02:05 UTCJul 23, 04:05 UTC2h 0m
2026-07-22 ESR605 ICN → NRT Jul 22, 22:40 UTCJul 23, 00:40 UTC2h 0m
2026-07-22 ESR650 FUK → ICN Jul 22, 12:05 UTCJul 22, 13:10 UTC1h 5m
2026-07-22 ESR631 ICN → OKA Jul 22, 04:20 UTCJul 22, 04:40 UTC20m
2026-07-22 ESR631 ICN → OKA Jul 22, 02:55 UTCJul 22, 03:30 UTC35m
2026-07-22 ESR136 ALA → ICN Jul 22, 00:10 UTCJul 22, 00:30 UTC20m
2026-07-21 ESR136 ALA → ICN Jul 21, 12:15 UTCJul 21, 23:20 UTC11h 5m
2026-07-21 ESR135 ICN → ALA Jul 21, 10:55 UTCJul 21, 11:20 UTC25m
2026-07-21 ESR632 OKA → ICN Jul 21, 06:20 UTCJul 21, 08:05 UTC1h 45m
2026-07-21 ESR631 ICN → OKA Jul 21, 02:55 UTCJul 21, 04:45 UTC1h 50m
2026-07-20 ESR624 - Jul 20, 10:45 UTCJul 20, 13:15 UTC2h 30m
2026-07-20 ESR623 - Jul 20, 07:10 UTCJul 20, 09:20 UTC2h 10m
2026-07-20 ESR612 KIX → ICN Jul 20, 04:10 UTCJul 20, 05:30 UTC1h 20m
2026-07-20 ESR611 ICN → KIX Jul 20, 00:50 UTCJul 20, 02:50 UTC2h 0m
2026-07-19 ESR562 - Jul 19, 22:45 UTCJul 19, 23:30 UTC45m
2026-07-19 ESR561 ICN → CXR Jul 19, 12:35 UTCJul 19, 21:40 UTC9h 5m
2026-07-19 ESR614 KIX → ICN Jul 19, 09:15 UTCJul 19, 10:35 UTC1h 20m
2026-07-19 ESR613 ICN → KIX Jul 19, 06:35 UTCJul 19, 08:05 UTC1h 30m
2026-07-19 ESR602 NRT → ICN Jul 19, 02:50 UTCJul 19, 04:40 UTC1h 50m
2026-07-18 ESR601 ICN → NRT Jul 18, 23:15 UTCJul 19, 01:10 UTC1h 55m
2026-07-18 ESR862 HKG → ICN Jul 18, 16:25 UTCJul 18, 19:45 UTC3h 20m
2026-07-18 ESR861 - Jul 18, 11:35 UTCJul 18, 14:40 UTC3h 5m
2026-07-18 ESR820 - Jul 18, 08:55 UTCJul 18, 09:15 UTC20m
2026-07-18 ESR819 - Jul 18, 05:50 UTCJul 18, 06:15 UTC25m
2026-07-18 ESR646 - Jul 18, 02:40 UTCJul 18, 03:45 UTC1h 6m
2026-07-18 ESR645 ICN → FUK Jul 18, 00:00 UTCJul 18, 00:45 UTC45m
2026-07-17 ESR854 CGO → ICN Jul 17, 10:50 UTCJul 17, 11:15 UTC25m
2026-07-17 ESR853 - Jul 17, 05:39 UTCJul 17, 06:05 UTC25m
2026-07-17 ESR818 - Jul 17, 03:05 UTCJul 17, 03:30 UTC25m
2026-07-17 ESR817 ICN → YNT Jul 17, 00:20 UTCJul 17, 00:40 UTC20m
2026-07-16 ESR862 - Jul 16, 16:25 UTCJul 16, 19:35 UTC3h 10m
2026-07-16 ESR861 ICN → HKG Jul 16, 11:40 UTCJul 16, 14:45 UTC3h 5m
2026-07-16 ESR672 - Jul 16, 07:40 UTCJul 16, 08:55 UTC1h 15m

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 HL8759 page for operator, model, and routing details .

Mode-S 71C759 frequently asked

What is Mode-S code 71C759?
71C759 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8759.
Where is Mode-S 71C759 registered?
Mode-S code 71C759 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 71C759 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C759, octal 34343531, decimal 7,456,601.
What flights does 71C759 operate?
Mode-S 71C759 has broadcast 20 distinct callsigns, including ESR136, ESR861, ESR626, ESR625, ESR862.