sensors Mode-S transponder

71C318

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

Currently assigned to HL8318 · BOEING 737-800

Hex
71C318
Octal
34341430
Decimal
7,455,512
Country
KR
Tail
HL8318
Type
B738
Broadcasting now · callsign JJA2211 · 34,000 ft
Flights observed
12
Distinct callsigns
5
Country
KR
Last broadcast
16h ago

Current position

71C318 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C318 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 5 distinct

Callsign Airline Flights Last seen
JJA2212 - 5 2026-04-14
JJA2107 - 3 2026-04-13
JJA2108 - 2 2026-04-13
JJA2402 Jeju Air 1 2026-04-12
JJA2211 - 1 2026-04-13

Recent flights last 12

DateFlightRouteTakeoffLandingDuration
2026-04-14 JJA2212 - Apr 14, 09:45 UTCApr 14, 10:20 UTC35m
2026-04-14 JJA2212 - Apr 14, 07:40 UTCApr 14, 08:40 UTC1h 0m
2026-04-13 JJA2108 - Apr 13, 20:35 UTCApr 13, 21:20 UTC45m
2026-04-13 JJA2108 - Apr 13, 17:55 UTCApr 13, 19:25 UTC1h 30m
2026-04-13 JJA2107 - Apr 13, 16:15 UTCApr 13, 16:30 UTC15m
2026-04-13 JJA2107 - Apr 13, 16:05 UTCApr 13, 16:30 UTC25m
2026-04-13 JJA2107 - Apr 13, 13:05 UTCApr 13, 16:15 UTC3h 10m
2026-04-13 JJA2212 - Apr 13, 08:20 UTCApr 13, 10:30 UTC2h 10m
2026-04-13 JJA2212 - Apr 13, 08:00 UTCApr 13, 10:30 UTC2h 30m
2026-04-13 JJA2212 - Apr 13, 07:40 UTCApr 13, 08:15 UTC35m
2026-04-13 JJA2211 - Apr 13, 00:40 UTCApr 13, 03:30 UTC2h 50m
2026-04-12 JJA2402 VTE → ICN Apr 12, 19:40 UTCApr 12, 20:15 UTC35m

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 HL8318 page for operator, model, and routing details .

Mode-S 71C318 frequently asked

What is Mode-S code 71C318?
71C318 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8318.
Where is Mode-S 71C318 registered?
Mode-S code 71C318 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 71C318 broadcasting right now?
Yes. Mode-S 71C318 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C318, octal 34341430, decimal 7,455,512.
What flights does 71C318 operate?
Mode-S 71C318 has broadcast 5 distinct callsigns, including JJA2212, JJA2107, JJA2108, JJA2402, JJA2211.