Apparatus

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sensors Mode-S transponder

71C715

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

Currently assigned to HL8715 · BOEING 737 MAX 8

Hex
71C715
Octal
34343425
Decimal
7,456,533
Country
KR
Tail
HL8715
Type
B38M
No current signal · last broadcast Jul 26, 13:05 UTC
Flights observed
465
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 13:05 UTC

Last known position

Most recent position reported by Mode-S 71C715.

Country allocation

The ICAO 24-bit address 71C715 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
ESR861 - 21 2026-07-01
ESR632 Eastar Jet 19 2026-07-23
ESR613 Eastar Jet 18 2026-07-21
ESR614 Eastar Jet 16 2026-07-21
ESR603 - 15 2026-07-09
ESR817 - 14 2026-07-02
ESR631 Eastar Jet 14 2026-07-23
ESR626 Eastar Jet 14 2026-07-26
ESR625 Eastar Jet 14 2026-07-26
ESR611 - 14 2026-07-09
ESR604 - 14 2026-07-09
ESR818 - 13 2026-07-02
ESR605 - 13 2026-07-15
ESR862 - 12 2026-07-01
ESR612 - 12 2026-07-09
ESR602 Eastar Jet 12 2026-07-21
ESR881 Eastar Jet 11 2026-07-21
ESR646 - 11 2026-07-13
ESR606 - 11 2026-07-16
ESR601 Eastar Jet 11 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ESR650 FUK → ICN Jul 26, 12:00 UTCJul 26, 13:05 UTC1h 5m
2026-07-26 ESR649 ICN → FUK Jul 26, 09:35 UTCJul 26, 10:25 UTC50m
2026-07-26 ESR626 CTS → ICN Jul 26, 04:15 UTCJul 26, 06:40 UTC2h 26m
2026-07-26 ESR625 ICN → CTS Jul 26, 00:45 UTCJul 26, 03:05 UTC2h 20m
2026-07-25 ESR581 ICN → PQC Jul 25, 11:35 UTCJul 25, 23:25 UTC11h 50m
2026-07-25 ESR672 TKS → ICN Jul 25, 07:45 UTCJul 25, 09:10 UTC1h 25m
2026-07-25 ESR671 ICN → TKS Jul 25, 05:00 UTCJul 25, 06:20 UTC1h 20m
2026-07-24 ESR582 PQC → ICN Jul 24, 10:50 UTCJul 24, 22:40 UTC11h 50m
2026-07-24 ESR626 CTS → ICN Jul 24, 04:35 UTCJul 24, 07:00 UTC2h 25m
2026-07-24 ESR625 ICN → CTS Jul 24, 00:50 UTCJul 24, 03:15 UTC2h 25m
2026-07-23 ESR582 PQC → ICN Jul 23, 11:05 UTCJul 23, 23:20 UTC12h 15m
2026-07-23 ESR632 OKA → ICN Jul 23, 06:05 UTCJul 23, 07:55 UTC1h 50m
2026-07-23 ESR631 ICN → OKA Jul 23, 02:45 UTCJul 23, 04:30 UTC1h 45m
2026-07-22 ESR561 ICN → CXR Jul 22, 12:45 UTCJul 22, 23:10 UTC10h 25m
2026-07-22 ESR882 TPE → ICN Jul 22, 03:05 UTCJul 22, 05:10 UTC2h 5m
2026-07-21 ESR881 ICN → TPE Jul 21, 23:10 UTCJul 22, 01:10 UTC2h 0m
2026-07-21 ESR872 PVG → ICN Jul 21, 13:50 UTCJul 21, 19:20 UTC5h 30m
2026-07-21 ESR614 KIX → ICN Jul 21, 10:20 UTCJul 21, 11:45 UTC1h 25m
2026-07-21 ESR613 ICN → KIX Jul 21, 07:45 UTCJul 21, 09:15 UTC1h 30m
2026-07-21 ESR602 NRT → ICN Jul 21, 04:20 UTCJul 21, 06:25 UTC2h 5m
2026-07-20 ESR601 ICN → NRT Jul 20, 23:25 UTCJul 21, 01:20 UTC1h 54m
2026-07-20 ESR8532 NTG → ICN Jul 20, 09:05 UTCJul 20, 14:00 UTC4h 55m
2026-07-20 ESR626 CTS → ICN Jul 20, 05:05 UTCJul 20, 07:35 UTC2h 30m
2026-07-20 ESR625 ICN → CTS Jul 20, 01:25 UTCJul 20, 03:40 UTC2h 15m
2026-07-19 ESR581 - Jul 19, 10:55 UTCJul 19, 23:20 UTC12h 25m
2026-07-19 ESR632 - Jul 19, 06:20 UTCJul 19, 08:10 UTC1h 50m
2026-07-19 ESR631 - Jul 19, 02:45 UTCJul 19, 04:30 UTC1h 45m
2026-07-19 ESR136 - Jul 19, 00:10 UTCJul 19, 00:35 UTC25m
2026-07-18 ESR135 ICN → ALA Jul 18, 11:00 UTCJul 18, 23:20 UTC12h 20m
2026-07-18 ESR632 - Jul 18, 06:20 UTCJul 18, 08:05 UTC1h 45m
2026-07-18 ESR631 - Jul 18, 04:15 UTCJul 18, 04:40 UTC25m
2026-07-18 ESR631 - Jul 18, 02:55 UTCJul 18, 03:30 UTC35m
2026-07-17 ESR581 ICN → ICN Jul 17, 11:04 UTCJul 17, 23:20 UTC12h 15m
2026-07-17 ESR626 - Jul 17, 04:14 UTCJul 17, 06:40 UTC2h 25m
2026-07-17 ESR625 - Jul 17, 00:45 UTCJul 17, 02:59 UTC2h 15m
2026-07-16 ESR593 ICN → ICN Jul 16, 12:05 UTCJul 16, 22:00 UTC9h 55m
2026-07-16 ESR820 - Jul 16, 08:55 UTCJul 16, 09:20 UTC25m
2026-07-16 ESR819 - Jul 16, 05:35 UTCJul 16, 05:55 UTC20m
2026-07-16 ESR606 NRT → ICN Jul 16, 02:05 UTCJul 16, 04:05 UTC2h 0m
2026-07-15 ESR605 - Jul 15, 22:40 UTCJul 16, 00:30 UTC1h 50m
2026-07-15 ESR650 - Jul 15, 11:55 UTCJul 15, 12:55 UTC1h 0m
2026-07-15 ESR649 - Jul 15, 09:30 UTCJul 15, 10:20 UTC50m
2026-07-15 ESR648 - Jul 15, 06:20 UTCJul 15, 07:15 UTC55m
2026-07-15 ESR647 - Jul 15, 03:40 UTCJul 15, 04:25 UTC45m
2026-07-14 ESR136 - Jul 14, 23:50 UTCJul 15, 00:10 UTC20m
2026-07-14 ESR136 - Jul 14, 22:40 UTCJul 14, 23:00 UTC19m
2026-07-14 ESR135 - Jul 14, 10:45 UTCJul 14, 11:10 UTC25m
2026-07-14 ESR602 NRT → ICN Jul 14, 02:55 UTCJul 14, 04:55 UTC2h 0m
2026-07-13 ESR601 ICN → NRT Jul 13, 23:15 UTCJul 14, 01:15 UTC2h 0m
2026-07-13 ESR624 - Jul 13, 08:50 UTCJul 13, 11:10 UTC2h 20m

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 HL8715 page for operator, model, and routing details .

Mode-S 71C715 frequently asked

What is Mode-S code 71C715?
71C715 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8715.
Where is Mode-S 71C715 registered?
Mode-S code 71C715 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 71C715 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 13:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C715, octal 34343425, decimal 7,456,533.
What flights does 71C715 operate?
Mode-S 71C715 has broadcast 20 distinct callsigns, including ESR861, ESR632, ESR613, ESR614, ESR603.