Apparatus

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sensors Mode-S transponder

71C716

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

Currently assigned to HL8716 · BOEING 737 MAX 8

Hex
71C716
Octal
34343426
Decimal
7,456,534
Country
KR
Tail
HL8716
Type
B38M
No current signal · last broadcast 52m ago
Flights observed
389
Distinct callsigns
20
Country
KR
Last broadcast
52m ago

Last known position

Most recent position reported by Mode-S 71C716.

Country allocation

The ICAO 24-bit address 71C716 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
ESR915 - 31 2026-07-10
ESR916 - 29 2026-07-10
ESR968 - 27 2026-07-14
ESR967 - 27 2026-07-14
ESR981 - 23 2026-07-08
ESR936 - 13 2026-07-13
ESR984 - 12 2026-07-09
ESR941 - 12 2026-07-10
ESR982 - 11 2026-07-08
ESR988 - 10 2026-07-14
ESR942 - 10 2026-07-10
ESR284 - 10 2026-06-18
ESR283 - 9 2026-06-18
ESR230 - 9 2026-06-18
ESR219 - 9 2026-06-18
ESR212 - 9 2026-06-18
ESR206 - 9 2026-06-18
ESR987 - 8 2026-07-14
ESR983 - 8 2026-07-09
ESR211 - 8 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ESR988 TPE → PUS Jul 14, 18:35 UTCJul 14, 21:20 UTC2h 45m
2026-07-14 ESR987 PUS → TPE Jul 14, 13:45 UTCJul 14, 15:35 UTC1h 50m
2026-07-14 ESR968 - Jul 14, 06:00 UTCJul 14, 06:40 UTC40m
2026-07-14 ESR967 - Jul 14, 03:45 UTCJul 14, 04:20 UTC35m
2026-07-13 ESR936 PUS → PUS Jul 13, 10:15 UTCJul 14, 01:00 UTC14h 45m
2026-07-13 ESR944 - Jul 13, 08:05 UTCJul 13, 08:45 UTC40m
2026-07-13 ESR943 - Jul 13, 06:05 UTCJul 13, 06:20 UTC15m
2026-07-13 ESR914 KIX → PUS Jul 13, 03:40 UTCJul 13, 04:45 UTC1h 5m
2026-07-13 ESR913 PUS → KIX Jul 13, 01:15 UTCJul 13, 02:20 UTC1h 5m
2026-07-12 ESR988 - Jul 12, 20:15 UTCJul 12, 21:05 UTC50m
2026-07-12 ESR988 - Jul 12, 18:50 UTCJul 12, 19:10 UTC20m
2026-07-12 ESR987 PUS → TPE Jul 12, 13:45 UTCJul 12, 15:50 UTC2h 5m
2026-07-12 ESR968 - Jul 12, 05:50 UTCJul 12, 06:35 UTC45m
2026-07-12 ESR967 - Jul 12, 03:40 UTCJul 12, 04:15 UTC35m
2026-07-11 ESR944 - Jul 11, 09:45 UTCJul 11, 10:15 UTC30m
2026-07-11 ESR943 - Jul 11, 07:45 UTCJul 11, 08:15 UTC30m
2026-07-11 ESR968 - Jul 11, 05:55 UTCJul 11, 06:35 UTC40m
2026-07-11 ESR967 - Jul 11, 03:40 UTCJul 11, 04:15 UTC35m
2026-07-10 ESR936 PUS → PUS Jul 10, 10:10 UTCJul 11, 00:45 UTC14h 35m
2026-07-10 ESR916 KIX → PUS Jul 10, 07:25 UTCJul 10, 08:30 UTC1h 5m
2026-07-10 ESR915 PUS → KIX Jul 10, 04:40 UTCJul 10, 05:45 UTC1h 5m
2026-07-10 ESR942 - Jul 10, 02:10 UTCJul 10, 02:50 UTC40m
2026-07-10 ESR941 - Jul 10, 00:10 UTCJul 10, 00:35 UTC25m
2026-07-09 ESR984 - Jul 9, 20:10 UTCJul 9, 21:05 UTC55m
2026-07-09 ESR984 - Jul 9, 18:50 UTCJul 9, 19:05 UTC15m
2026-07-09 ESR983 - Jul 9, 15:20 UTCJul 9, 16:00 UTC40m
2026-07-09 ESR983 - Jul 9, 13:40 UTCJul 9, 14:00 UTC20m
2026-07-09 ESR916 KIX → PUS Jul 9, 07:25 UTCJul 9, 08:30 UTC1h 5m
2026-07-09 ESR915 PUS → KIX Jul 9, 04:45 UTCJul 9, 05:50 UTC1h 5m
2026-07-09 ESR942 - Jul 9, 02:05 UTCJul 9, 02:40 UTC35m
2026-07-09 ESR941 - Jul 9, 00:10 UTCJul 9, 00:25 UTC15m
2026-07-08 ESR982 - Jul 8, 21:10 UTCJul 8, 21:40 UTC30m
2026-07-08 ESR981 - Jul 8, 10:05 UTCJul 8, 20:10 UTC10h 5m
2026-07-08 ESR916 KIX → PUS Jul 8, 07:20 UTCJul 8, 08:25 UTC1h 5m
2026-07-08 ESR915 PUS → KIX Jul 8, 04:40 UTCJul 8, 05:50 UTC1h 10m
2026-07-08 ESR914 - Jul 8, 02:05 UTCJul 8, 03:10 UTC1h 5m
2026-07-07 ESR913 PUS → KIX Jul 7, 22:00 UTCJul 7, 23:00 UTC1h 0m
2026-07-07 ESR968 - Jul 7, 05:50 UTCJul 7, 06:40 UTC50m
2026-07-07 ESR967 - Jul 7, 03:35 UTCJul 7, 04:10 UTC35m
2026-07-06 ESR936 ALA → PUS Jul 6, 10:00 UTCJul 7, 00:45 UTC14h 45m
2026-07-06 ESR916 KIX → PUS Jul 6, 07:15 UTCJul 6, 08:20 UTC1h 5m
2026-07-06 ESR915 PUS → KIX Jul 6, 04:40 UTCJul 6, 05:45 UTC1h 5m
2026-07-06 ESR942 - Jul 6, 02:25 UTCJul 6, 03:05 UTC40m
2026-07-06 ESR941 - Jul 6, 00:00 UTCJul 6, 00:30 UTC30m
2026-07-05 ESR918 - Jul 5, 20:25 UTCJul 5, 21:10 UTC45m
2026-07-05 ESR918 - Jul 5, 16:20 UTCJul 5, 17:30 UTC1h 10m
2026-07-05 ESR917 - Jul 5, 10:05 UTCJul 5, 14:50 UTC4h 45m
2026-07-05 ESR916 KIX → PUS Jul 5, 07:25 UTCJul 5, 08:25 UTC1h 0m
2026-07-05 ESR915 PUS → KIX Jul 5, 04:35 UTCJul 5, 05:40 UTC1h 5m
2026-07-05 ESR942 - Jul 5, 02:10 UTCJul 5, 02:40 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 HL8716 page for operator, model, and routing details .

Mode-S 71C716 frequently asked

What is Mode-S code 71C716?
71C716 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8716.
Where is Mode-S 71C716 registered?
Mode-S code 71C716 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 71C716 broadcasting right now?
No active broadcast right now. Last signal was 52m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C716, octal 34343426, decimal 7,456,534.
What flights does 71C716 operate?
Mode-S 71C716 has broadcast 20 distinct callsigns, including ESR915, ESR916, ESR968, ESR967, ESR981.