Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C588

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

Currently assigned to HL8588 · BOEING 737-800

Hex
71C588
Octal
34342610
Decimal
7,456,136
Country
KR
Tail
HL8588
Type
B738
No current signal · last broadcast Jul 26, 12:35 UTC
Flights observed
495
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 12:35 UTC

Last known position

Most recent position reported by Mode-S 71C588.

Country allocation

The ICAO 24-bit address 71C588 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
ESR984 - 27 2026-07-18
ESR952 Eastar Jet 27 2026-07-21
ESR951 Eastar Jet 27 2026-07-21
ESR913 Eastar Jet 25 2026-07-20
ESR983 - 23 2026-07-18
ESR988 Eastar Jet 21 2026-07-19
ESR987 - 20 2026-07-19
ESR964 - 18 2026-07-21
ESR963 Eastar Jet 17 2026-07-20
ESR915 - 17 2026-07-14
ESR914 Eastar Jet 17 2026-07-20
ESR943 - 15 2026-07-18
ESR916 - 15 2026-07-14
ESR944 - 14 2026-07-18
ESR985 - 11 2026-07-16
ESR284 Eastar Jet 10 2026-07-26
ESR283 Eastar Jet 10 2026-07-26
ESR271 Eastar Jet 10 2026-07-24
ESR230 Eastar Jet 10 2026-07-26
ESR219 Eastar Jet 10 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ESR230 CJU → GMP Jul 26, 11:55 UTCJul 26, 12:30 UTC35m
2026-07-26 ESR283 GMP → CJU Jul 26, 09:45 UTCJul 26, 10:20 UTC35m
2026-07-26 ESR284 CJU → GMP Jul 26, 08:05 UTCJul 26, 08:40 UTC35m
2026-07-26 ESR219 GMP → CJU Jul 26, 06:00 UTCJul 26, 06:40 UTC41m
2026-07-26 ESR212 CJU → GMP Jul 26, 04:15 UTCJul 26, 05:00 UTC45m
2026-07-26 ESR211 GMP → CJU Jul 26, 02:10 UTCJul 26, 02:45 UTC35m
2026-07-26 ESR204 CJU → GMP Jul 26, 00:25 UTCJul 26, 01:10 UTC45m
2026-07-25 ESR231 GMP → CJU Jul 25, 11:15 UTCJul 25, 11:45 UTC30m
2026-07-25 ESR276 CJU → GMP Jul 25, 09:30 UTCJul 25, 10:15 UTC45m
2026-07-25 ESR275 GMP → CJU Jul 25, 07:10 UTCJul 25, 07:45 UTC35m
2026-07-25 ESR274 CJU → GMP Jul 25, 05:25 UTCJul 25, 06:05 UTC40m
2026-07-25 ESR273 GMP → CJU Jul 25, 03:15 UTCJul 25, 03:45 UTC30m
2026-07-25 ESR272 CJU → GMP Jul 25, 01:15 UTCJul 25, 02:00 UTC45m
2026-07-24 ESR271 GMP → CJU Jul 24, 22:55 UTCJul 24, 23:30 UTC35m
2026-07-24 ESR228 CJU → GMP Jul 24, 11:10 UTCJul 24, 11:55 UTC45m
2026-07-24 ESR227 GMP → CJU Jul 24, 09:15 UTCJul 24, 09:45 UTC30m
2026-07-24 ESR220 CJU → GMP Jul 24, 07:25 UTCJul 24, 08:10 UTC45m
2026-07-24 ESR217 GMP → CJU Jul 24, 05:15 UTCJul 24, 05:50 UTC35m
2026-07-24 ESR210 CJU → GMP Jul 24, 03:20 UTCJul 24, 04:05 UTC45m
2026-07-24 ESR209 GMP → CJU Jul 24, 01:05 UTCJul 24, 01:40 UTC35m
2026-07-23 ESR202 CJU → GMP Jul 23, 23:30 UTCJul 24, 00:10 UTC40m
2026-07-23 ESR201 GMP → CJU Jul 23, 21:20 UTCJul 23, 21:55 UTC35m
2026-07-23 ESR232 CJU → GMP Jul 23, 13:10 UTCJul 23, 13:45 UTC35m
2026-07-23 ESR231 GMP → CJU Jul 23, 11:00 UTCJul 23, 11:45 UTC45m
2026-07-23 ESR276 - Jul 23, 09:25 UTCJul 23, 10:05 UTC40m
2026-07-23 ESR275 GMP → CJU Jul 23, 06:50 UTCJul 23, 07:25 UTC35m
2026-07-23 ESR274 CJU → GMP Jul 23, 05:10 UTCJul 23, 05:50 UTC40m
2026-07-23 ESR273 GMP → CJU Jul 23, 02:50 UTCJul 23, 03:25 UTC35m
2026-07-23 ESR272 CJU → GMP Jul 23, 01:05 UTCJul 23, 01:45 UTC40m
2026-07-22 ESR207 GMP → CJU Jul 22, 23:00 UTCJul 22, 23:35 UTC35m
2026-07-22 ESR232 CJU → GMP Jul 22, 12:55 UTCJul 22, 13:35 UTC40m
2026-07-22 ESR231 GMP → CJU Jul 22, 11:10 UTCJul 22, 11:20 UTC10m
2026-07-22 ESR274 CJU → GMP Jul 22, 04:50 UTCJul 22, 05:25 UTC35m
2026-07-22 ESR273 GMP → CJU Jul 22, 02:45 UTCJul 22, 03:20 UTC35m
2026-07-22 ESR282 CJU → GMP Jul 22, 00:45 UTCJul 22, 01:25 UTC40m
2026-07-21 ESR901 PUS → CJU Jul 21, 22:05 UTCJul 21, 22:20 UTC15m
2026-07-21 ESR952 CTS → PUS Jul 21, 08:55 UTCJul 21, 11:00 UTC2h 5m
2026-07-21 ESR951 PUS → CTS Jul 21, 05:30 UTCJul 21, 07:25 UTC1h 55m
2026-07-21 ESR964 - Jul 21, 02:55 UTCJul 21, 04:20 UTC1h 25m
2026-07-20 ESR963 PUS → OKA Jul 20, 23:05 UTCJul 21, 00:35 UTC1h 29m
2026-07-20 ESR952 CTS → PUS Jul 20, 09:30 UTCJul 20, 11:45 UTC2h 15m
2026-07-20 ESR951 PUS → CTS Jul 20, 06:10 UTCJul 20, 08:15 UTC2h 5m
2026-07-20 ESR914 KIX → PUS Jul 20, 03:40 UTCJul 20, 04:45 UTC1h 5m
2026-07-20 ESR913 PUS → KIX Jul 20, 01:10 UTCJul 20, 02:15 UTC1h 5m
2026-07-19 ESR988 TPE → PUS Jul 19, 20:20 UTCJul 19, 21:10 UTC50m
2026-07-19 ESR988 TPE → PUS Jul 19, 18:50 UTCJul 19, 19:10 UTC20m
2026-07-19 ESR987 PUS → TPE Jul 19, 13:55 UTCJul 19, 15:45 UTC1h 50m
2026-07-19 ESR952 CTS → PUS Jul 19, 08:50 UTCJul 19, 10:55 UTC2h 5m
2026-07-19 ESR951 PUS → CTS Jul 19, 05:20 UTCJul 19, 07:25 UTC2h 5m
2026-07-19 ESR964 - Jul 19, 03:20 UTCJul 19, 03:50 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 HL8588 page for operator, model, and routing details .

Mode-S 71C588 frequently asked

What is Mode-S code 71C588?
71C588 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8588.
Where is Mode-S 71C588 registered?
Mode-S code 71C588 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 71C588 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 12:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C588, octal 34342610, decimal 7,456,136.
What flights does 71C588 operate?
Mode-S 71C588 has broadcast 20 distinct callsigns, including ESR984, ESR952, ESR951, ESR913, ESR983.