Apparatus

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sensors Mode-S transponder

71C718

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

Currently assigned to HL-8718 · BOEING 737 MAX 8

Hex
71C718
Octal
34343430
Decimal
7,456,536
Country
KR
Tail
HL-8718
Type
B38M
No current signal · last broadcast 1h ago
Flights observed
226
Distinct callsigns
20
Country
KR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 71C718.

Country allocation

The ICAO 24-bit address 71C718 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
ESR536 Eastar Jet 18 2026-05-28
ESR861 Eastar Jet 16 2026-05-29
ESR632 Eastar Jet 15 2026-05-29
ESR631 Eastar Jet 14 2026-05-25
ESR650 Eastar Jet 10 2026-05-26
ESR649 Eastar Jet 10 2026-05-26
ESR648 Eastar Jet 10 2026-05-30
ESR647 Eastar Jet 9 2026-05-30
ESR626 Eastar Jet 9 2026-05-27
ESR535 Eastar Jet 9 2026-05-24
ESR862 Eastar Jet 8 2026-05-29
ESR625 Eastar Jet 7 2026-05-27
ESR602 Eastar Jet 6 2026-05-06
ESR601 Eastar Jet 6 2026-05-05
ESR671 Eastar Jet 5 2026-05-23
ESR646 Eastar Jet 5 2026-05-11
ESR593 Eastar Jet 5 2026-05-01
ESR561 Eastar Jet 5 2026-05-15
ESR645 Eastar Jet 4 2026-05-11
ESR562 Eastar Jet 4 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 ESR648 FUK → ICN May 30, 07:35 UTCMay 30, 08:00 UTC25m
2026-05-30 ESR647 ICN → FUK May 30, 05:00 UTCMay 30, 05:30 UTC30m
2026-05-30 ESR818 YNT → ICN May 30, 03:20 UTCMay 30, 03:45 UTC25m
2026-05-30 ESR817 ICN → YNT May 30, 00:10 UTCMay 30, 00:30 UTC20m
2026-05-29 ESR862 HKG → ICN May 29, 16:30 UTCMay 29, 19:40 UTC3h 10m
2026-05-29 ESR861 ICN → HKG May 29, 14:15 UTCMay 29, 14:40 UTC25m
2026-05-29 ESR861 ICN → HKG May 29, 11:30 UTCMay 29, 13:45 UTC2h 15m
2026-05-29 ESR632 OKA → ICN May 29, 02:50 UTCMay 29, 08:00 UTC5h 10m
2026-05-28 ESR536 MDC → ICN May 28, 11:50 UTCMay 28, 23:35 UTC11h 45m
2026-05-28 ESR632 OKA → ICN May 28, 02:45 UTCMay 28, 08:40 UTC5h 55m
2026-05-27 ESR536 MDC → ICN May 27, 11:45 UTCMay 27, 23:45 UTC12h 0m
2026-05-27 ESR626 CTS → ICN May 27, 04:14 UTCMay 27, 06:49 UTC2h 35m
2026-05-27 ESR625 ICN → CTS May 27, 00:44 UTCMay 27, 02:59 UTC2h 15m
2026-05-26 ESR650 FUK → ICN May 26, 12:00 UTCMay 26, 13:04 UTC1h 5m
2026-05-26 ESR649 ICN → FUK May 26, 09:29 UTCMay 26, 09:59 UTC30m
2026-05-26 ESR626 CTS → ICN May 26, 04:24 UTCMay 26, 06:49 UTC2h 25m
2026-05-26 ESR625 ICN → CTS May 26, 00:35 UTCMay 26, 02:55 UTC2h 20m
2026-05-25 ESR862 HKG → ICN May 25, 16:35 UTCMay 25, 19:44 UTC3h 9m
2026-05-25 ESR861 ICN → HKG May 25, 14:15 UTCMay 25, 14:30 UTC15m
2026-05-25 ESR861 ICN → HKG May 25, 11:30 UTCMay 25, 13:45 UTC2h 15m
2026-05-25 ESR631 ICN → OKA May 25, 02:50 UTCMay 25, 08:45 UTC5h 55m
2026-05-24 ESR536 MDC → ICN May 24, 23:35 UTCMay 24, 23:46 UTC11m
2026-05-24 ESR535 ICN → MDC May 24, 11:50 UTCMay 24, 21:10 UTC9h 20m
2026-05-24 ESR632 OKA → ICN May 24, 02:50 UTCMay 24, 08:05 UTC5h 15m
2026-05-23 ESR536 MDC → ICN May 23, 11:45 UTCMay 23, 23:45 UTC12h 1m
2026-05-23 ESR672 TKS → ICN May 23, 07:40 UTCMay 23, 09:05 UTC1h 25m
2026-05-23 ESR671 ICN → TKS May 23, 05:05 UTCMay 23, 06:25 UTC1h 20m
2026-05-23 ESR671 ICN → TKS May 23, 04:50 UTCMay 23, 04:55 UTC5m
2026-05-23 ESR818 YNT → ICN May 23, 03:20 UTCMay 23, 03:40 UTC20m
2026-05-23 ESR817 ICN → YNT May 23, 00:10 UTCMay 23, 00:30 UTC20m
2026-05-22 ESR650 FUK → ICN May 22, 12:10 UTCMay 22, 13:10 UTC1h 0m
2026-05-22 ESR649 ICN → FUK May 22, 09:30 UTCMay 22, 10:05 UTC35m
2026-05-22 ESR626 CTS → ICN May 22, 04:10 UTCMay 22, 06:40 UTC2h 30m
2026-05-22 ESR625 ICN → CTS May 22, 00:35 UTCMay 22, 02:55 UTC2h 20m
2026-05-21 ESR562 CXR → ICN May 21, 12:15 UTCMay 21, 23:15 UTC11h 0m
2026-05-21 ESR614 KIX → ICN May 21, 09:35 UTCMay 21, 10:55 UTC1h 20m
2026-05-21 ESR613 ICN → KIX May 21, 06:35 UTCMay 21, 07:55 UTC1h 20m
2026-05-21 ESR606 NRT → ICN May 21, 02:40 UTCMay 21, 04:55 UTC2h 15m
2026-05-20 ESR605 ICN → NRT May 20, 22:50 UTCMay 21, 01:00 UTC2h 10m
2026-05-20 ESR650 FUK → ICN May 20, 11:50 UTCMay 20, 12:55 UTC1h 5m
2026-05-20 ESR649 ICN → FUK May 20, 09:30 UTCMay 20, 10:00 UTC30m
2026-05-20 ESR648 FUK → ICN May 20, 06:20 UTCMay 20, 07:20 UTC1h 0m
2026-05-20 ESR647 ICN → FUK May 20, 03:55 UTCMay 20, 04:25 UTC30m
2026-05-19 ESR632 OKA → ICN May 19, 07:40 UTCMay 19, 08:05 UTC25m
2026-05-19 ESR631 ICN → OKA May 19, 04:00 UTCMay 19, 04:20 UTC20m
2026-05-19 ESR631 ICN → OKA May 19, 02:40 UTCMay 19, 03:10 UTC30m
2026-05-18 ESR862 HKG → ICN May 18, 16:25 UTCMay 18, 19:40 UTC3h 14m
2026-05-18 ESR861 ICN → HKG May 18, 14:20 UTCMay 18, 14:35 UTC15m
2026-05-18 ESR861 ICN → HKG May 18, 11:25 UTCMay 18, 13:40 UTC2h 15m
2026-05-18 ESR648 FUK → ICN May 18, 06:50 UTCMay 18, 07:20 UTC30m

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 HL-8718 page for operator, model, and routing details .

Mode-S 71C718 frequently asked

What is Mode-S code 71C718?
71C718 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL-8718.
Where is Mode-S 71C718 registered?
Mode-S code 71C718 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 71C718 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 71C718, octal 34343430, decimal 7,456,536.
What flights does 71C718 operate?
Mode-S 71C718 has broadcast 20 distinct callsigns, including ESR536, ESR861, ESR632, ESR631, ESR650.