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 Jul 26, 21:45 UTC
Flights observed
447
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 21:45 UTC

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 - 37 2026-07-20
ESR632 Eastar Jet 30 2026-07-20
ESR631 Eastar Jet 30 2026-07-20
ESR861 - 21 2026-07-17
ESR648 - 19 2026-07-18
ESR647 - 18 2026-07-18
ESR650 - 17 2026-07-12
ESR649 - 17 2026-07-12
ESR535 Eastar Jet 17 2026-07-19
ESR626 - 15 2026-07-07
ESR862 - 13 2026-07-17
ESR625 - 12 2026-07-07
ESR671 - 10 2026-07-11
ESR601 - 10 2026-07-12
ESR672 - 8 2026-07-11
ESR602 - 8 2026-07-13
ESR818 - 7 2026-07-19
ESR817 Eastar Jet 7 2026-07-19
ESR614 - 6 2026-07-14
ESR613 - 6 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ESR918 CNX → PUS Jul 26, 21:00 UTCJul 26, 21:40 UTC40m
2026-07-26 ESR918 CNX → PUS Jul 26, 16:35 UTCJul 26, 17:50 UTC1h 15m
2026-07-26 ESR917 PUS → CNX Jul 26, 10:30 UTCJul 26, 15:25 UTC4h 55m
2026-07-26 ESR916 KIX → PUS Jul 26, 07:15 UTCJul 26, 08:25 UTC1h 10m
2026-07-26 ESR915 PUS → KIX Jul 26, 04:35 UTCJul 26, 05:50 UTC1h 15m
2026-07-26 ESR942 FUK → PUS Jul 26, 02:20 UTCJul 26, 02:45 UTC25m
2026-07-26 ESR941 PUS → FUK Jul 26, 00:05 UTCJul 26, 00:40 UTC35m
2026-07-25 ESR981 PUS → PQC Jul 25, 10:25 UTCJul 25, 21:45 UTC11h 20m
2026-07-25 ESR968 KMJ → PUS Jul 25, 06:05 UTCJul 25, 06:50 UTC45m
2026-07-25 ESR967 PUS → KMJ Jul 25, 03:40 UTCJul 25, 04:20 UTC40m
2026-07-24 ESR935 PUS → ALA Jul 24, 12:00 UTCJul 25, 01:55 UTC13h 55m
2026-07-24 ESR946 - Jul 24, 09:50 UTCJul 24, 10:25 UTC35m
2026-07-24 ESR943 PUS → FUK Jul 24, 08:00 UTCJul 24, 08:35 UTC35m
2026-07-24 ESR968 KMJ → PUS Jul 24, 06:00 UTCJul 24, 06:40 UTC40m
2026-07-24 ESR967 PUS → KMJ Jul 24, 03:45 UTCJul 24, 04:20 UTC35m
2026-07-24 ESR902 CJU → PUS Jul 24, 01:35 UTCJul 24, 01:50 UTC15m
2026-07-23 ESR271 GMP → CJU Jul 23, 22:55 UTCJul 23, 23:30 UTC35m
2026-07-23 ESR278 - Jul 23, 13:30 UTCJul 23, 14:00 UTC30m
2026-07-23 ESR233 GMP → CJU Jul 23, 11:45 UTCJul 23, 12:20 UTC35m
2026-07-23 ESR220 CJU → GMP Jul 23, 10:20 UTCJul 23, 10:55 UTC35m
2026-07-23 ESR217 GMP → CJU Jul 23, 08:05 UTCJul 23, 08:20 UTC15m
2026-07-23 ESR217 GMP → CJU Jul 23, 06:35 UTCJul 23, 07:00 UTC25m
2026-07-23 ESR217 GMP → CJU Jul 23, 05:10 UTCJul 23, 05:45 UTC35m
2026-07-23 ESR210 CJU → GMP Jul 23, 03:20 UTCJul 23, 03:55 UTC35m
2026-07-23 ESR209 GMP → CJU Jul 23, 01:15 UTCJul 23, 01:50 UTC35m
2026-07-22 ESR202 CJU → GMP Jul 22, 23:30 UTCJul 23, 00:10 UTC40m
2026-07-22 ESR201 GMP → CJU Jul 22, 21:20 UTCJul 22, 21:55 UTC35m
2026-07-22 ESR278 - Jul 22, 12:55 UTCJul 22, 13:30 UTC35m
2026-07-22 ESR222 CJU → GMP Jul 22, 11:15 UTCJul 22, 11:25 UTC10m
2026-07-22 ESR214 CJU → GMP Jul 22, 04:45 UTCJul 22, 05:25 UTC40m
2026-07-22 ESR281 GMP → CJU Jul 22, 02:35 UTCJul 22, 03:10 UTC35m
2026-07-22 ESR204 CJU → GMP Jul 22, 00:20 UTCJul 22, 01:00 UTC40m
2026-07-21 ESR229 GMP → CJU Jul 21, 10:00 UTCJul 21, 10:35 UTC35m
2026-07-21 ESR888 TSA → GMP Jul 21, 07:50 UTCJul 21, 08:35 UTC45m
2026-07-21 ESR888 TSA → GMP Jul 21, 06:25 UTCJul 21, 06:45 UTC20m
2026-07-21 ESR887 GMP → TSA Jul 21, 04:30 UTCJul 21, 04:45 UTC15m
2026-07-21 ESR887 GMP → TSA Jul 21, 02:40 UTCJul 21, 03:15 UTC35m
2026-07-21 ESR204 CJU → GMP Jul 21, 00:25 UTCJul 21, 01:05 UTC40m
2026-07-20 ESR715 - Jul 20, 11:45 UTCJul 20, 12:20 UTC35m
2026-07-20 ESR171F - Jul 20, 10:25 UTCJul 20, 10:45 UTC20m
2026-07-20 ESR632 OKA → ICN Jul 20, 06:20 UTCJul 20, 08:10 UTC1h 50m
2026-07-20 ESR631 ICN → OKA Jul 20, 03:05 UTCJul 20, 04:45 UTC1h 40m
2026-07-20 ESR536 - Jul 20, 00:25 UTCJul 20, 01:00 UTC35m
2026-07-19 ESR535 ICN → MDC Jul 19, 13:10 UTCJul 19, 23:35 UTC10h 25m
2026-07-19 ESR854 CGO → ICN Jul 19, 11:00 UTCJul 19, 11:25 UTC25m
2026-07-19 ESR853 - Jul 19, 06:10 UTCJul 19, 06:35 UTC25m
2026-07-19 ESR818 - Jul 19, 04:20 UTCJul 19, 04:40 UTC20m
2026-07-19 ESR817 ICN → YNT Jul 19, 01:35 UTCJul 19, 01:55 UTC20m
2026-07-18 ESR536 ICN → ICN Jul 18, 12:00 UTCJul 19, 00:05 UTC12h 5m
2026-07-18 ESR648 - Jul 18, 06:15 UTCJul 18, 07:20 UTC1h 5m

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 Jul 26, 21:45 UTC.
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, ESR632, ESR631, ESR861, ESR648.