Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C700

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

Currently assigned to HL8700 · BOEING 737-800

Hex
71C700
Octal
34343400
Decimal
7,456,512
Country
KR
Tail
HL8700
Type
B738
No current signal · last broadcast Jul 26, 20:55 UTC
Flights observed
818
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 20:55 UTC

Last known position

Most recent position reported by Mode-S 71C700.

Country allocation

The ICAO 24-bit address 71C700 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
ESR782 Eastar Jet 38 2026-07-26
ESR716 Eastar Jet 33 2026-07-26
ESR781 Eastar Jet 32 2026-07-26
ESR711 Eastar Jet 31 2026-07-24
ESR224 Eastar Jet 31 2026-07-26
ESR233 Eastar Jet 30 2026-07-26
ESR223 Eastar Jet 30 2026-07-26
ESR282 Eastar Jet 28 2026-07-26
ESR214 Eastar Jet 24 2026-07-25
ESR281 Eastar Jet 22 2026-07-25
ESR274 - 21 2026-07-05
ESR213 Eastar Jet 21 2026-07-26
ESR276 - 20 2026-07-20
ESR273 - 20 2026-07-05
ESR216 Eastar Jet 20 2026-07-26
ESR275 Eastar Jet 19 2026-07-20
ESR208 Eastar Jet 18 2026-07-23
ESR277 Eastar Jet 17 2026-07-25
ESR272 Eastar Jet 17 2026-07-24
ESR207 Eastar Jet 17 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ESR782 TPE → CJJ Jul 26, 18:50 UTCJul 26, 20:55 UTC2h 5m
2026-07-26 ESR781 CJJ → TPE Jul 26, 14:50 UTCJul 26, 16:40 UTC1h 50m
2026-07-26 ESR716 CJU → CJJ Jul 26, 13:00 UTCJul 26, 13:30 UTC30m
2026-07-26 ESR233 GMP → CJU Jul 26, 10:40 UTCJul 26, 11:15 UTC35m
2026-07-26 ESR224 CJU → GMP Jul 26, 09:10 UTCJul 26, 09:45 UTC35m
2026-07-26 ESR223 GMP → CJU Jul 26, 07:00 UTCJul 26, 07:35 UTC35m
2026-07-26 ESR216 CJU → GMP Jul 26, 05:10 UTCJul 26, 05:50 UTC40m
2026-07-26 ESR213 GMP → CJU Jul 26, 02:50 UTCJul 26, 03:25 UTC35m
2026-07-26 ESR282 CJU → GMP Jul 26, 00:50 UTCJul 26, 01:35 UTC45m
2026-07-25 ESR205 GMP → CJU Jul 25, 22:00 UTCJul 25, 22:35 UTC35m
2026-07-25 ESR232 CJU → GMP Jul 25, 12:50 UTCJul 25, 13:35 UTC45m
2026-07-25 ESR277 GMP → CJU Jul 25, 10:35 UTCJul 25, 11:10 UTC35m
2026-07-25 ESR222 CJU → GMP Jul 25, 08:35 UTCJul 25, 09:25 UTC50m
2026-07-25 ESR221 GMP → CJU Jul 25, 06:35 UTCJul 25, 07:10 UTC35m
2026-07-25 ESR214 CJU → GMP Jul 25, 04:50 UTCJul 25, 05:30 UTC40m
2026-07-25 ESR281 GMP → CJU Jul 25, 02:40 UTCJul 25, 03:15 UTC35m
2026-07-25 ESR282 CJU → GMP Jul 25, 01:00 UTCJul 25, 01:40 UTC40m
2026-07-24 ESR711 CJJ → CJU Jul 24, 22:55 UTCJul 24, 23:20 UTC25m
2026-07-24 ESR782 TPE → CJJ Jul 24, 19:30 UTCJul 24, 21:25 UTC1h 55m
2026-07-24 ESR781 CJJ → TPE Jul 24, 15:50 UTCJul 24, 17:50 UTC2h 0m
2026-07-24 ESR716 CJU → CJJ Jul 24, 13:25 UTCJul 24, 13:55 UTC30m
2026-07-24 ESR233 GMP → CJU Jul 24, 10:55 UTCJul 24, 11:30 UTC35m
2026-07-24 ESR224 CJU → GMP Jul 24, 09:20 UTCJul 24, 10:00 UTC40m
2026-07-24 ESR223 GMP → CJU Jul 24, 07:00 UTCJul 24, 07:35 UTC35m
2026-07-24 ESR216 CJU → GMP Jul 24, 05:20 UTCJul 24, 06:00 UTC40m
2026-07-24 ESR213 GMP → CJU Jul 24, 02:55 UTCJul 24, 03:30 UTC35m
2026-07-24 ESR272 CJU → GMP Jul 24, 01:10 UTCJul 24, 01:50 UTC40m
2026-07-23 ESR711 CJJ → CJU Jul 23, 22:55 UTCJul 23, 23:25 UTC30m
2026-07-23 ESR782 TPE → CJJ Jul 23, 19:20 UTCJul 23, 21:15 UTC1h 55m
2026-07-23 ESR781 CJJ → TPE Jul 23, 15:20 UTCJul 23, 17:20 UTC2h 0m
2026-07-23 ESR716 CJU → CJJ Jul 23, 13:25 UTCJul 23, 14:00 UTC35m
2026-07-23 ESR227 GMP → CJU Jul 23, 11:05 UTCJul 23, 11:40 UTC35m
2026-07-23 ESR224 CJU → GMP Jul 23, 09:20 UTCJul 23, 10:00 UTC40m
2026-07-23 ESR223 GMP → CJU Jul 23, 07:05 UTCJul 23, 07:35 UTC30m
2026-07-23 ESR216 CJU → GMP Jul 23, 05:15 UTCJul 23, 05:55 UTC40m
2026-07-23 ESR213 GMP → CJU Jul 23, 02:50 UTCJul 23, 03:30 UTC40m
2026-07-23 ESR208 CJU → GMP Jul 23, 00:55 UTCJul 23, 01:35 UTC40m
2026-07-22 ESR711 CJJ → CJU Jul 22, 22:55 UTCJul 22, 23:20 UTC25m
2026-07-22 ESR821 - Jul 22, 15:05 UTCJul 22, 21:15 UTC6h 10m
2026-07-22 ESR716 - Jul 22, 13:05 UTCJul 22, 13:35 UTC30m
2026-07-22 ESR224 CJU → GMP Jul 22, 11:10 UTCJul 22, 11:15 UTC5m
2026-07-22 ESR216 CJU → GMP Jul 22, 04:55 UTCJul 22, 05:25 UTC30m
2026-07-22 ESR213 GMP → CJU Jul 22, 02:50 UTCJul 22, 03:25 UTC35m
2026-07-22 ESR272 - Jul 22, 01:00 UTCJul 22, 01:40 UTC40m
2026-07-21 ESR711 CJJ → CJU Jul 21, 23:00 UTCJul 21, 23:25 UTC25m
2026-07-21 ESR782 TPE → CJJ Jul 21, 20:25 UTCJul 21, 21:00 UTC35m
2026-07-21 ESR782 TPE → CJJ Jul 21, 18:55 UTCJul 21, 19:15 UTC20m
2026-07-21 ESR781 CJJ → TPE Jul 21, 16:35 UTCJul 21, 16:55 UTC20m
2026-07-21 ESR781 CJJ → TPE Jul 21, 14:55 UTCJul 21, 15:35 UTC40m
2026-07-21 ESR716 - Jul 21, 13:20 UTCJul 21, 13:50 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 HL8700 page for operator, model, and routing details .

Mode-S 71C700 frequently asked

What is Mode-S code 71C700?
71C700 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8700.
Where is Mode-S 71C700 registered?
Mode-S code 71C700 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 71C700 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C700, octal 34343400, decimal 7,456,512.
What flights does 71C700 operate?
Mode-S 71C700 has broadcast 20 distinct callsigns, including ESR782, ESR716, ESR781, ESR711, ESR224.