Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71BF20

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

Currently assigned to HL7720 · AIRBUS A-330-300

Hex
71BF20
Octal
34337440
Decimal
7,454,496
Country
KR
Tail
HL7720
Type
A333
No current signal · last broadcast 58m ago
Flights observed
163
Distinct callsigns
20
Country
KR
Last broadcast
58m ago

Last known position

Most recent position reported by Mode-S 71BF20.

Country allocation

The ICAO 24-bit address 71BF20 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
KAL2117 - 33 2026-07-15
KAL2118 - 32 2026-07-14
KAL2057 - 29 2026-07-13
KAL2058 Korean Air 14 2026-07-14
KAL2106 Korean Air 4 2026-06-11
KAL2027 Korean Air 4 2026-06-04
KAL2105 Korean Air 3 2026-06-10
KAL2028 Korean Air 3 2026-06-04
KAL1312 Korean Air 3 2026-06-11
KAL1246 Korean Air 3 2026-06-10
KAL1244 Korean Air 3 2026-06-11
KAL1188 Korean Air 3 2026-06-10
KAL1177 Korean Air 3 2026-06-11
KAL1121 Korean Air 3 2026-06-10
KAL1113 Korean Air 3 2026-06-11
KAL1055 Korean Air 3 2026-06-10
KAL864 Korean Air 2 2026-06-05
KAL2011 Korean Air 2 2026-06-03
KAL887 Korean Air 1 2026-06-03
KAL882 Korean Air 1 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 KAL2117 GMP → KIX Jul 15, 00:35 UTCJul 15, 01:55 UTC1h 20m
2026-07-14 KAL2058 SHA → GMP Jul 14, 07:15 UTCJul 14, 13:05 UTC5h 50m
2026-07-14 KAL2118 KIX → GMP Jul 14, 03:35 UTCJul 14, 04:50 UTC1h 15m
2026-07-14 KAL2117 GMP → KIX Jul 14, 00:20 UTCJul 14, 01:40 UTC1h 20m
2026-07-13 KAL2057 GMP → GMP Jul 13, 07:15 UTCJul 13, 12:25 UTC5h 10m
2026-07-13 KAL2118 - Jul 13, 03:50 UTCJul 13, 05:05 UTC1h 15m
2026-07-13 KAL2117 GMP → KIX Jul 13, 00:30 UTCJul 13, 01:50 UTC1h 20m
2026-07-12 KAL2058 SHA → GMP Jul 12, 12:05 UTCJul 12, 12:40 UTC35m
2026-07-12 KAL2057 - Jul 12, 07:05 UTCJul 12, 07:50 UTC45m
2026-07-12 KAL2118 - Jul 12, 03:50 UTCJul 12, 05:10 UTC1h 20m
2026-07-12 KAL2117 GMP → KIX Jul 12, 00:40 UTCJul 12, 01:55 UTC1h 15m
2026-07-11 KAL2057 GMP → GMP Jul 11, 07:10 UTCJul 11, 12:05 UTC4h 55m
2026-07-11 KAL2118 KIX → GMP Jul 11, 03:55 UTCJul 11, 05:10 UTC1h 15m
2026-07-11 KAL2117 GMP → KIX Jul 11, 00:30 UTCJul 11, 01:55 UTC1h 25m
2026-07-10 KAL2057 GMP → GMP Jul 10, 07:10 UTCJul 10, 12:40 UTC5h 30m
2026-07-10 KAL2118 KIX → GMP Jul 10, 04:00 UTCJul 10, 05:20 UTC1h 20m
2026-07-10 KAL2117 GMP → KIX Jul 10, 00:35 UTCJul 10, 02:00 UTC1h 25m
2026-07-09 KAL2057 - Jul 9, 07:30 UTCJul 9, 12:30 UTC5h 0m
2026-07-09 KAL2118 KIX → GMP Jul 9, 04:20 UTCJul 9, 05:40 UTC1h 20m
2026-07-09 KAL2117 GMP → KIX Jul 9, 00:35 UTCJul 9, 02:10 UTC1h 35m
2026-07-08 KAL2058 SHA → GMP Jul 8, 11:45 UTCJul 8, 12:30 UTC45m
2026-07-08 KAL2057 - Jul 8, 07:15 UTCJul 8, 08:00 UTC45m
2026-07-08 KAL2118 KIX → GMP Jul 8, 03:45 UTCJul 8, 05:05 UTC1h 20m
2026-07-08 KAL2117 GMP → KIX Jul 8, 00:35 UTCJul 8, 01:55 UTC1h 20m
2026-07-07 KAL2058 SHA → GMP Jul 7, 11:45 UTCJul 7, 12:20 UTC35m
2026-07-07 KAL2057 - Jul 7, 07:05 UTCJul 7, 07:50 UTC45m
2026-07-07 KAL2118 - Jul 7, 03:40 UTCJul 7, 05:00 UTC1h 20m
2026-07-07 KAL2117 GMP → KIX Jul 7, 00:45 UTCJul 7, 02:05 UTC1h 20m
2026-07-06 KAL2057 GMP → GMP Jul 6, 07:10 UTCJul 6, 12:35 UTC5h 25m
2026-07-06 KAL2118 - Jul 6, 04:00 UTCJul 6, 05:20 UTC1h 20m
2026-07-06 KAL2117 GMP → KIX Jul 6, 00:35 UTCJul 6, 01:55 UTC1h 20m
2026-07-05 KAL2057 GMP → GMP Jul 5, 07:10 UTCJul 5, 12:20 UTC5h 10m
2026-07-05 KAL2118 - Jul 5, 04:00 UTCJul 5, 05:25 UTC1h 25m
2026-07-05 KAL2117 GMP → KIX Jul 5, 00:25 UTCJul 5, 01:40 UTC1h 15m
2026-07-04 KAL2057 GMP → GMP Jul 4, 07:15 UTCJul 4, 12:20 UTC5h 5m
2026-07-04 KAL2118 KIX → GMP Jul 4, 03:50 UTCJul 4, 05:10 UTC1h 20m
2026-07-04 KAL2117 GMP → KIX Jul 4, 00:25 UTCJul 4, 01:35 UTC1h 10m
2026-07-03 KAL2057 GMP → GMP Jul 3, 07:10 UTCJul 3, 12:50 UTC5h 40m
2026-07-03 KAL2118 KIX → GMP Jul 3, 04:05 UTCJul 3, 05:25 UTC1h 20m
2026-07-03 KAL2117 GMP → KIX Jul 3, 00:35 UTCJul 3, 01:55 UTC1h 20m
2026-07-02 KAL2058 SHA → GMP Jul 2, 11:55 UTCJul 2, 12:30 UTC35m
2026-07-02 KAL2057 - Jul 2, 07:25 UTCJul 2, 08:15 UTC50m
2026-07-02 KAL2118 KIX → GMP Jul 2, 03:55 UTCJul 2, 05:15 UTC1h 20m
2026-07-02 KAL2117 GMP → KIX Jul 2, 00:25 UTCJul 2, 01:45 UTC1h 20m
2026-07-01 KAL2057 GMP → GMP Jul 1, 07:15 UTCJul 1, 12:15 UTC5h 0m
2026-07-01 KAL2118 - Jul 1, 03:50 UTCJul 1, 05:10 UTC1h 20m
2026-07-01 KAL2117 GMP → KIX Jul 1, 00:35 UTCJul 1, 01:55 UTC1h 20m
2026-06-30 KAL2058 SHA → GMP Jun 30, 11:30 UTCJun 30, 12:05 UTC35m
2026-06-30 KAL2057 - Jun 30, 07:10 UTCJun 30, 07:55 UTC45m
2026-06-30 KAL2118 KIX → GMP Jun 30, 04:10 UTCJun 30, 05:25 UTC1h 15m

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 HL7720 page for operator, model, and routing details .

Mode-S 71BF20 frequently asked

What is Mode-S code 71BF20?
71BF20 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7720.
Where is Mode-S 71BF20 registered?
Mode-S code 71BF20 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 71BF20 broadcasting right now?
No active broadcast right now. Last signal was 58m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF20, octal 34337440, decimal 7,454,496.
What flights does 71BF20 operate?
Mode-S 71BF20 has broadcast 20 distinct callsigns, including KAL2117, KAL2118, KAL2057, KAL2058, KAL2106.