Apparatus

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sensors Mode-S transponder

71C717

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

Currently assigned to HL8717 · BOEING 737 MAX 8

Hex
71C717
Octal
34343427
Decimal
7,456,535
Country
KR
Tail
HL8717
Type
B38M
Broadcasting now · callsign ESR607 · 4,125 ft
Flights observed
499
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 21:45 UTC

Current position

71C717 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C717 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 - 31 2026-07-09
ESR614 - 24 2026-07-15
ESR613 - 23 2026-07-15
ESR602 Eastar Jet 21 2026-07-25
ESR606 - 19 2026-07-14
ESR605 - 19 2026-07-13
ESR862 - 18 2026-07-09
ESR601 Eastar Jet 18 2026-07-24
ESR604 - 15 2026-07-14
ESR603 - 14 2026-07-14
ESR632 - 13 2026-07-16
ESR612 - 13 2026-07-12
ESR611 - 13 2026-07-12
ESR650 Eastar Jet 12 2026-07-25
ESR649 Eastar Jet 12 2026-07-25
ESR518 - 12 2026-07-18
ESR648 Eastar Jet 10 2026-07-24
ESR647 Eastar Jet 10 2026-07-24
ESR646 Eastar Jet 10 2026-07-23
ESR631 - 10 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ESR593 ICN → DAD Jul 26, 13:20 UTCJul 26, 21:45 UTC8h 25m
2026-07-26 ESR8262 DAT → ICN Jul 26, 11:25 UTCJul 26, 11:50 UTC25m
2026-07-26 ESR8262 DAT → ICN Jul 26, 10:10 UTCJul 26, 10:40 UTC30m
2026-07-26 ESR8261 ICN → DAT Jul 26, 07:00 UTCJul 26, 08:45 UTC1h 45m
2026-07-26 ESR882 TPE → ICN Jul 26, 04:10 UTCJul 26, 04:55 UTC45m
2026-07-26 ESR882 TPE → ICN Jul 26, 02:45 UTCJul 26, 03:00 UTC15m
2026-07-25 ESR881 ICN → TPE Jul 25, 23:00 UTCJul 26, 01:05 UTC2h 5m
2026-07-25 ESR650 FUK → ICN Jul 25, 11:55 UTCJul 25, 12:55 UTC1h 0m
2026-07-25 ESR649 ICN → FUK Jul 25, 09:30 UTCJul 25, 10:15 UTC45m
2026-07-25 ESR602 NRT → ICN Jul 25, 02:50 UTCJul 25, 04:45 UTC1h 55m
2026-07-24 ESR601 ICN → NRT Jul 24, 23:10 UTCJul 25, 01:05 UTC1h 55m
2026-07-24 ESR650 FUK → ICN Jul 24, 11:50 UTCJul 24, 12:55 UTC1h 5m
2026-07-24 ESR649 ICN → FUK Jul 24, 09:35 UTCJul 24, 10:15 UTC40m
2026-07-24 ESR648 FUK → ICN Jul 24, 06:25 UTCJul 24, 07:25 UTC1h 0m
2026-07-24 ESR647 ICN → FUK Jul 24, 03:40 UTCJul 24, 04:40 UTC1h 0m
2026-07-23 ESR624 - Jul 23, 08:50 UTCJul 23, 11:15 UTC2h 25m
2026-07-23 ESR623 ICN → CTS Jul 23, 04:55 UTCJul 23, 07:20 UTC2h 25m
2026-07-23 ESR646 FUK → ICN Jul 23, 02:45 UTCJul 23, 03:35 UTC50m
2026-07-22 ESR645 ICN → FUK Jul 22, 23:55 UTCJul 23, 00:40 UTC45m
2026-07-22 ESR624 - Jul 22, 11:10 UTCJul 22, 11:35 UTC25m
2026-07-22 ESR623 ICN → CTS Jul 22, 05:10 UTCJul 22, 05:25 UTC15m
2026-07-22 ESR646 FUK → ICN Jul 22, 02:45 UTCJul 22, 03:45 UTC1h 0m
2026-07-22 ESR645 ICN → FUK Jul 22, 00:15 UTCJul 22, 01:00 UTC45m
2026-07-21 ESR594F - Jul 21, 00:20 UTCJul 21, 03:25 UTC3h 5m
2026-07-19 ESR593 - Jul 19, 13:20 UTCJul 19, 16:15 UTC2h 55m
2026-07-19 ESR624 - Jul 19, 08:55 UTCJul 19, 11:15 UTC2h 20m
2026-07-19 ESR623 ICN → CTS Jul 19, 04:55 UTCJul 19, 07:20 UTC2h 25m
2026-07-19 ESR646 FUK → ICN Jul 19, 02:40 UTCJul 19, 03:35 UTC55m
2026-07-19 ESR645 ICN → FUK Jul 19, 00:05 UTCJul 19, 00:50 UTC45m
2026-07-18 ESR518 - Jul 18, 17:00 UTCJul 18, 21:55 UTC4h 55m
2026-07-18 ESR517 - Jul 18, 09:40 UTCJul 18, 14:15 UTC4h 35m
2026-07-18 ESR626 - Jul 18, 04:15 UTCJul 18, 06:40 UTC2h 25m
2026-07-18 ESR625 ICN → CTS Jul 18, 00:25 UTCJul 18, 02:50 UTC2h 26m
2026-07-17 ESR650 FUK → ICN Jul 17, 11:50 UTCJul 17, 12:50 UTC1h 0m
2026-07-17 ESR649 - Jul 17, 09:35 UTCJul 17, 10:20 UTC45m
2026-07-17 ESR648 - Jul 17, 06:05 UTCJul 17, 07:05 UTC1h 0m
2026-07-17 ESR647 - Jul 17, 03:34 UTCJul 17, 04:14 UTC40m
2026-07-16 ESR582 PQC → ICN Jul 16, 11:34 UTCJul 16, 23:15 UTC11h 40m
2026-07-16 ESR632 - Jul 16, 06:20 UTCJul 16, 08:10 UTC1h 50m
2026-07-16 ESR631 - Jul 16, 04:10 UTCJul 16, 04:30 UTC20m
2026-07-16 ESR631 - Jul 16, 02:50 UTCJul 16, 03:25 UTC35m
2026-07-15 ESR872 ICN → ICN Jul 15, 13:45 UTCJul 15, 18:20 UTC4h 35m
2026-07-15 ESR614 KIX → ICN Jul 15, 09:15 UTCJul 15, 10:30 UTC1h 15m
2026-07-15 ESR613 ICN → KIX Jul 15, 06:30 UTCJul 15, 07:55 UTC1h 25m
2026-07-15 ESR602 NRT → ICN Jul 15, 02:50 UTCJul 15, 04:40 UTC1h 50m
2026-07-14 ESR601 ICN → NRT Jul 14, 23:15 UTCJul 15, 01:10 UTC1h 55m
2026-07-14 ESR604 NRT → ICN Jul 14, 10:10 UTCJul 14, 12:10 UTC2h 0m
2026-07-14 ESR603 ICN → NRT Jul 14, 06:25 UTCJul 14, 08:20 UTC1h 55m
2026-07-14 ESR606 NRT → ICN Jul 14, 02:15 UTCJul 14, 04:15 UTC2h 0m
2026-07-13 ESR605 ICN → NRT Jul 13, 22:40 UTCJul 14, 00:35 UTC1h 55m

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 HL8717 page for operator, model, and routing details .

Mode-S 71C717 frequently asked

What is Mode-S code 71C717?
71C717 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8717.
Where is Mode-S 71C717 registered?
Mode-S code 71C717 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 71C717 broadcasting right now?
Yes. Mode-S 71C717 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C717, octal 34343427, decimal 7,456,535.
What flights does 71C717 operate?
Mode-S 71C717 has broadcast 20 distinct callsigns, including ESR861, ESR614, ESR613, ESR602, ESR606.